Commit Graph

93 Commits

Author SHA1 Message Date
xarmian aad3c35bdb fix(cli): pad item list --format json pages to completion when --limit is not set (BUG-4024) (#2279)
* fix(cli): pad item list --format json pages to completion when --limit is not set (BUG-4024)

`pad item list --format json` stopped at the CLI's own 200 default and said
so on stderr only, so a consumer parsing the array saw 200 of 204 rows with
no signal in the payload. Ruling: with --format json and no --limit (cobra
Changed, not a value compare) the CLI follows X-Pad-Next-Offset to the end,
sends no limit and prints no notice. The payload stays a plain array; no
API, schema or MCP change.

An explicit --limit, including --limit 0, keeps today's behaviour and its
stderr notice. --limit 0 has always meant "the default" (clamped to 200),
not "no limit"; a test pins that. Table and markdown are untouched.
--offset with no --limit pages from that offset to the end.

One private pager (listAllPages) now backs ListAllItems and
ListAllCollectionItems (the old names stay as wrappers) and new *Report
variants taking a start offset and returning the first page's undeclared
filter keys, so the BUG-3480 warning still fires. A non-advancing next
offset, or more than 1000 pages, is an error and a non-zero exit with a
message naming the cap, never a partial array. This also applies to the
existing callers (reconcile, github status, project standup), which used to
return a short list for the non-advancing case.

Claude-Session: https://claude.ai/code/session_013aLLQx2EARjEzmWHbExjtm

* fix(cli): the list pager requires has-more pages to be full and contiguous (BUG-4024 R2-F1)

listAllPages accepted any next offset greater than the current one, so an
empty has-more page, or a next offset that skipped rows never returned,
followed by a has-more=false page, ended the loop on a partial list with no
error. The server sets has-more only when it trimmed the probe row
(handlers_items.go listItemsPage), so such a page holds exactly `limit` rows
and next-offset == offset+len(items) with len(items) > 0. The pager now
requires exactly that and otherwise returns an error with nil items. The
check subsumes the old `NextOffset <= offset` test.

Tests: empty page (advancing and non-advancing next offset), a jump, and one
short, at the client level; the jump at the `pad item list --format json`
level (non-zero exit, empty stdout).

Claude-Session: https://claude.ai/code/session_013aLLQx2EARjEzmWHbExjtm

* fix(cli): the list pager reads a negative start offset as 0, as the server does (BUG-4024 R3-F1)

Claude-Session: https://claude.ai/code/session_01UiMM6MkrYr1nkuaNkSmkeD
2026-10-21 22:34:38 -04:00
xarmian ed89604ad8 fix(mcp): a refused call names its cause on both transports (BUG-3864) (#2218)
* fix(mcp): a refused call names its cause on both transports (BUG-3864)

A 403 from one of the shared gates now carries details.reason (role,
token_scope, no_access, workspace_not_authorized), with code and message
unchanged. MCP builds one permission_denied envelope from it on both
transports, with a hint that says what to do next. It used to lead with
"Insufficient role" for every 403, so a bot with a read-only API token was
told to ask for a role. An unverified Cloud email is reported as the
server's own email_not_verified code.

Stdio gets the same envelope from a structured marker the CLI root writes
for a 403 coded forbidden, permission_denied or email_not_verified. Before
it, the token-scope and unverified-email refusals said server_error there.

ToolSurfaceVersion 0.99 -> 0.100 (behavior).

Claude-Session: https://claude.ai/code/session_01MPeShv3DBfM9C94PTvMnqi

* fix(server): the inline workspace-role gates name their reason too (BUG-3864)

The bulk endpoint, the owner-only member doors and the owner-only app
install and upgrade doors say role, or no_access for a guest.

Claude-Session: https://claude.ai/code/session_01MPeShv3DBfM9C94PTvMnqi

* fix(mcp): the permission hint is the same on both transports (BUG-3864)

The remote hint appended the route, which stdio has no way to know, so one
refusal reached the two transports with different hints. The tests compared
prefixes only and missed it; both now assert the transports agree exactly.

Claude-Session: https://claude.ai/code/session_01MPeShv3DBfM9C94PTvMnqi

* fix(server): no role hint for a caller with no role to change (BUG-3864)

requireMinRole and the grants list said role for a guest, who holds grants
rather than a role, and for a caller with no workspace role at all. Both
now go through roleGateReason, which answers no_access for either.

Claude-Session: https://claude.ai/code/session_01MPeShv3DBfM9C94PTvMnqi
2026-10-17 19:11:58 -04:00
xarmian 47fe81ab99 fix(cli,mcp): explicit-limit callers read every page or say they are truncated (BUG-3793) (#2154)
* fix(cli,mcp): pad reconcile and pad github status read every page, and the MCP items resource says when it is truncated (BUG-3793)

Three callers set an explicit list limit and treated the capped answer
as complete: pad reconcile read one 500-row page of the workspace, pad
github status read 100 rows of each collection, and the MCP items
resource (pad://workspace/{ws}/items, 200 rows) read as the whole
workspace with no sign it was cut.

reconcile now uses ListAllItems, and github status a new
ListAllCollectionItems (its collection scan moved into
githubStatusScanItems so it is testable); both follow the server's
next-offset to the end. The resource asks for one row past its cap on
both transports (stdio --limit 201; remote fetchItemList honors the
flag) and, when that row comes back, serves 200 rows plus a second
text/plain block saying more exist. A list that fits is unchanged.
Resources are outside the tool catalog: no ToolSurfaceVersion move.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* fix(cli): the completed-work report pages until the cutoff (BUG-3793, Codex r1 Medium)

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-14 06:33:44 -04:00
xarmian fc9ceae92f fix(api): children, starred and shared-collection lists are bounded at 1000 and paged; MCP starred caps at 300 (BUG-3789, BUG-3790, BUG-3792) (#2153)
* fix(api): the children list, the starred list and a shared collection are bounded at 1000 and paged; MCP starred caps at 300 (BUG-3789, BUG-3790, BUG-3792)

Each returned every row with its body: the children of an item, the
caller's starred items, and every item of a shared collection to an
anonymous reader. They now take the BUG-3704 contract: limit defaults
to and is capped at 1000, offset skips rows, and X-Pad-Has-More /
X-Pad-Next-Offset carry the paging state (the share payload, a JSON
object, also says has_more and next_offset in the body). Each order
ends on the id, so offset pages neither repeat nor skip rows that tie.

Children: store.ListChildItems applies the caller's visibility in the
query, so the window and has-more count only visible children, and the
has_children probe reads one visible grandchild instead of every
grandchild with its body. Starred: read without bodies, filtered for
visibility and terminal status (which stays in Go), windowed, and
bodies are loaded only for the page (store.ItemBodies). Share link:
ListItems takes the window.

Callers walk every page: the web children and starred lists by offset
until a short page (request() exposes no headers; rows de-duplicated
by id), the web share page by next_offset (merging items and
attachment refs), including the password retry, and pad item starred
by the server's next-offset. Each walk fails past 50 pages rather than
return a partial list.

MCP pad_item action=starred never pages (lead ruling, as BUG-3704 for
list): both transports ask for one row past the 300 cap (remote
?limit=301, stdio the new `pad item starred --limit`) and say has_more
with the truncation note. ToolSurfaceVersion 0.99.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* test(api): an offset past the end of the starred and children lists is [] (BUG-3789, BUG-3790; lead check)

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-14 05:35:34 -04:00
xarmian 858bd8514e fix(api): item lists are bounded at 1000 with has-more paging, and filter-key probing is bounded (BUG-3704, BUG-3703) (#2143)
* fix(api): a list request's field filters are bounded, and the stored-key probe stops at the first absent key (BUG-3703)

checkListFilterKeys asked StoredFieldKeys about every undeclared filter
key, each a scan of the list's scope, and refused only afterwards: N
absent keys cost N scans. The first absent key already decides the 400,
so the probe stops there (one scan, however many keys), and a request
carrying more than 50 field filters is refused before any store work.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* fix(api): item lists are bounded at 1000 with has-more/next-offset headers, page stably, and page on ?search= too (BUG-3704)

A missing, zero, negative or invalid limit on GET /items and the
collection item list returned every matching item with its body. It now
takes the maximum (1000, lead ruling: an old client loses rows only on a
list past it), an explicit limit is clamped to it, and a limit+1 probe
sets X-Pad-Has-More (always) and X-Pad-Next-Offset (when more). The
list sort always ends on i.id, so an offset page cannot repeat or skip
rows that tie, and the ?search= path applies the offset it used to drop.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* fix(cli,mcp): item lists report the server's exact has-more; pad item list gains --offset; pad_item list says when it is truncated (BUG-3704)

pad item list keeps its 200 default (TASK-2000) and replaces the
len==limit guess with the server's X-Pad-Has-More, naming the next
step (--offset N) on stderr in every format; --offset is new, matching
item search and backlinks. pad project standup's in-progress section
pages through next-offset (ListAllItems), since a report needs every
row. pad_item list asks for one row past its limit and, when it comes
back, trims it and sets has_more with a note; it never pages (lead
ruling). An untruncated result is unchanged.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* chore(mcp): ToolSurfaceVersion 0.98, pad_item list says has_more when truncated (BUG-3704)

Additive on the v0.53 grounds; golden initialize bytes regenerated (the
version and the instructions heading are the only moves).

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* fix(web): pages that need a whole collection page through it; WebMCP pad_item list is bounded and says has_more (BUG-3704)

listAllByCollection walks a collection in pages of the server's 1000
cap. The library page's active-convention/playbook maps, both playbook
pages' invocation_slug uniqueness lists and the conventions page use it,
since each silently misbehaves on a short list. WebMCP pad_item list
had no default at all; it now mirrors the Go catalog (50, max 300, one
probe row, has_more + note when cut short). docs/api.md documents the
bounded, paged list and the 50-filter cap.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* test(web): page mocks and identity-gate rows follow listAllByCollection (BUG-3704)

The library, playbooks and conventions page tests mocked listByCollection,
which those pages no longer call. The TASK-3097 identity gate pins
library loadData (and its three fetch continuations, whose hash takes
the 120 characters before the call) and the playbook editor's
loadPlaybooks: re-reviewed, the checks still run after the one awaited
call, so a result whose pages straddled an identity change is discarded.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* fix(mcp,web): a fractional pad_item list limit takes whole rows (BUG-3704, Codex r2)

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-14 01:07:58 -04:00
xarmian 223c9734d8 fix(cli): a workspace or ref string cannot re-route a request, and PAD_TOKEN is not sent to a server only .pad.toml named (BUG-3645, BUG-3646) (#2127)
BUG-3645: workspace slugs and refs were concatenated raw into request
paths, so a .pad.toml workspace of "victim/#" turned `pad item delete
TASK-1` into DELETE /workspaces/victim/. Every dynamic segment in the
client builders now goes through url.PathEscape. Client.newRequest
refuses a path with a raw '#', an empty, "." or ".." segment (PathEscape
leaves dots alone), or a '/' after its '?', which catches any builder
that misses escaping, plus the raw-path methods' callers. A reflection
census calls every *Client method with a hostile string in each string
argument and asserts that the string stays escaped inside one segment.

BUG-3646: PAD_TOKEN was attached to whatever URL the client was given,
including a committed .pad.toml's url. It is now bound to the server
chosen before that override (--url, PAD_URL, the config or the default).
Requests to a server that only .pad.toml names use the credential saved
for it, and the CLI warns once. Setting PAD_URL to that server or passing
--url opts in. Every check of whether the env token is in play (whoami,
server info, init, login/logout, 2fa) goes through the same accessor.

Claude-Session: https://claude.ai/code/session_01Rj4CMyK2EqxerMihbGs3Kr
2026-10-13 15:19:37 -04:00
xarmian a6f96107f4 feat(lease): an opaque worker id holds item leases, so two agents under one name do not share one (TASK-3613) (#2102)
A lease was "ours" when its free-text label and the account matched, and the
label was the agent's display name, so names carried correctness: two
unregistered Claude Code sessions on one account both held as "claude-code",
and two stateless remote MCP clients shared their bare client name.

A lease is now held under a WORKER ID plus the account (lead rulings on the
item); the label is display only.

- Format: "wk_" + 32 lowercase hex (128 random bits), minted by the CLIENT.
  The server checks the shape (400 invalid_worker_id) and always matches it
  together with the account; a worker id with no signed-in user is refused.
- Store: one predicate, leaseOurs, shared by claim, release and the
  next/ready foreign filter, COALESCEd so its negation is exact. A
  worker-bound lease is ours iff worker id + account match; a name-only one
  keeps the label + account rule, and a worker refreshing its own name-only
  lease binds it. A name-only caller never matches a worker-bound lease,
  even under the same label (the collision fixed). Migrations SQLite 142 /
  PG 112 add items.lease_worker_id (NUL-excluded: format-validated in the
  store before any SQL).
- Server: the worker id comes from the body, then X-Pad-Worker, then a
  ?worker_id query, then the remote MCP caller. The claim answers with the
  caller's own worker_id; reads and the 409 show only the SHORT id
  ("wk_3f2a"); a name-only caller colliding under its own name is told how to
  get a worker id.
- CLI: `pad session register` mints the id into the session's registry
  record, keeps it when the same process re-registers (a /clear: same pid
  and start token) and mints a new one for a new process; older records get
  one lazily; $PAD_WORKER_ID overrides; X-Pad-Worker is sent on every call;
  --worker-id on claim, release, project next and ready (the local-stdio MCP
  path for worker_id).
- MCP: the remote default holder label is the bare client name (dropping
  BUG-2772's "#xxxxxxxx" suffix); the worker id is derived from the account
  and the MCP session; an explicit `worker_id` (pad_item claim/release,
  pad_project next/ready) overrides it and is the resume path across
  connections. ToolSurfaceVersion 0.97 (additive). The catalog text pays for
  itself: tools/list is 4 bytes smaller (the stale holder text is fixed and
  the ttl text trimmed).
- Docs: a claim/release section in docs/api.md (it had none), the
  docs/mcp.md Leases paragraph and changelog, SKILL.md, CLI help. The web UI
  renders no lease today; the TS type gains the short worker for a future
  badge.

Tests: store worker-id rules; server (two workers under one name, account
scoping, the name-only 409 and its message, adopting one's own name-only
lease, 400s, next agreeing with the claim across a matrix); MCP (bare-name
holder, the claim's worker_id, resume via worker_id in claim and next,
malformed refused, session-derived ids stable and distinct); CLI (the id
survives a re-register by the same process, a new process gets a new one,
lazy mint, PAD_WORKER_ID, SetWorkerID). The two CLI rules each kill a
mutant.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-12 09:24:33 -04:00
xarmian fbba819eb8 feat(cli,mcp): pad item context and pad_item action=context (PLAN-3598 slice (c)) (#2099)
The CLI and MCP doors onto GET /items/{ref}/context (slice (b), #2094):
one deterministic brief for working an item.

- `pad item context <ref> [--intent] [--role] [--budget]`: --format json
  prints the server's body verbatim; the default markdown render lists the
  item, parents with parsed acceptance criteria, conventions, playbooks,
  dependencies, decisions, links, conflicts and what was omitted for size.
- client.GetItemContext.
- MCP `pad_item.action=context`, read-only: passThrough to the CLI on
  stdio, and the HTTP route with intent / role / budget on the query.
  New `intent` and `budget` params; `role` is now also read by it.
- Every registry guard: field-conflict exclusions, read-only cmdPath and
  cmdhelp, ChatGPT exclusion, compact description header, instructions.md
  (cut to stay under the initialize budget), the README table.
- ToolSurfaceVersion 0.96 (additive), after TASK-3611's 0.93-0.95; docs/mcp.md entry; golden wire
  files regenerated.

Tests: the markdown render (every section, nearest-parent body only, an
empty brief renders no sections) and the MCP route mapping (goes red when
budget is dropped from the route's queryParams).

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-12 05:56:59 -04:00
xarmian ccd915f1cc feat(push): idempotency keys for push, and the monitor drops a re-published push (TASK-3585) (#2071)
POST .../items/{ref}/push accepts op_key (body) or Idempotency-Key,
claimed after every refusal. Push writes no row, so its answer cannot
commit with it; per the lead's ruling the key is completed AFTER the
publish (store.CompleteIdempotencyKey, its own transaction):
- a clean publish stores the response; a same-key retry replays it and
  publishes nothing;
- an unconfirmed publish stores 409 push_outcome_unknown, so a retry
  says "check your agent session" instead of delivering again;
- a closed bus published nothing and releases the key.

A crash between the publish and the completion lets the lease expire and
a retry take the claim over and publish again. Every publish therefore
carries a push_id derived from (workspace, user, key), the same across a
takeover, on watchevents.Notification and the stream payload, and
`pad watch --stream --for-session` drops a push_id it printed in the last
~256 events / 10 minutes, across reconnects. A monitor that predates
push_id prints every publish (at-least-once, as before).

CLI: `pad push --op-key` (fresh per invocation by default) and one keyed
retry after a 5xx, only against a server advertising idempotency_keys.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-11 16:44:56 -04:00
xarmian 493498c977 feat(items): idempotency keys for comments, notes and decisions; idempotency_target_gone is structured (TASK-3585) (#2068)
* fix(mcp): idempotency_target_gone is a structured code on both transports (TASK-3585)

A replayed create whose item has since been deleted answers 410
idempotency_target_gone. Remote MCP had no 410 arm, and the CLI wrote no
stdio marker for it, so it reached agents as a generic error. It is now
allow-listed, mapped on the remote 410 arm, and marked on stdio, with a
hint shared between internal/cli and internal/mcp.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* feat(items): idempotency keys for comment create (TASK-3585)

POST .../items/{ref}/comments accepts op_key (body) or Idempotency-Key.
The key's answer (the comment id) is recorded inside
CreateCommentWithActivity's transaction, so a retry whose first answer
was lost returns that comment instead of a twin. A refused comment
releases its key; a replay of a comment deleted since answers 410
idempotency_target_gone. `pad item comment --op-key` (a fresh key per
invocation by default) retries once behind the idempotency_keys
capability; MCP comment forwards op_key on both transports.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* feat(items): idempotency keys for note and decision appends (TASK-3585)

PATCH /workspaces/{ws}/items/{ref} accepts op_key (body) or
Idempotency-Key, but only on an append-only update
(append_implementation_note and/or append_decision, plus source); a key
with any other member is refused 400. The answer (the item id and the
minted entries) is recorded in the update's own transaction, so a retry
whose first answer was lost echoes the first entries in `appended`
instead of appending twice. The built-in and patch callers, which reach
this handler with their own key, are untouched.

`pad item note|decide --op-key` (fresh per invocation by default) retry
once behind the idempotency_keys capability; MCP note/decide forward
op_key. ToolSurfaceVersion 0.91 -> 0.92 (additive; also records the 410
now being structured). docs/api.md covers create, comment and append keys.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-11 14:38:15 -04:00
xarmian c46ecc4cf8 feat(items): idempotency keys for item create (TASK-3585) (#2065)
A create carries op_key (body) or Idempotency-Key (header). The key is
claimed before the write and its answer (the created item's id) is stored
inside the create's own transaction, so a retry whose first answer was
lost returns that item instead of creating a twin. A refused create
releases its key; a key reused for a different create is 422
idempotency_key_reused; one still in flight is 409 idempotency_in_flight.
A replay whose item has since been deleted answers 410
idempotency_target_gone.

CLI: `pad item create --op-key`, a fresh key per invocation by default,
and one same-key retry of a 5xx or transport error, only when the server
advertises idempotency_keys. MCP: pad_item create accepts op_key on both
transports (remote maps it into the body; stdio passes --op-key).
ToolSurfaceVersion 0.90 -> 0.91 (additive).

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-11 13:06:44 -04:00
xarmian 7ec0191d45 feat(items): idempotency keys for patch writes (TASK-3585) (#2062)
* feat(items): idempotency keys for patch writes; an unconfirmed patch resolves only through its own tab (TASK-3585)

A patch may carry an idempotency key (Idempotency-Key header, or op_key).
The key is claimed per (workspace, user, key) before any write-path guard,
with a lease, and its answer is recorded inside the write's own
transaction, guarded by the claim token: done holds exactly when the write
committed, so an expired claim committed nothing and may be taken over. A
retry of the same request replays the answer (Idempotent-Replayed); a key
reused for another request is 422; a live claim is 409 in flight; a
refused write releases the key.

When an open editor received the patch and never confirmed it, the key
records the patch id and a boot-scoped reference to that connection. A
retry goes only to that connection, whose tab remembers the patches it
applied and re-acks one it is sent again; with it gone the answer is
patch_outcome_unknown with the diff since, and nothing is re-planned, since
an insert-shaped edit would keep its anchor elsewhere.

The CLI sends a key per invocation and retries once with it on a
transport error or 5xx. MCP 0.90 adds op_key and three codes.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* fix(cli): retry a keyed write only when the server advertises idempotency_keys (TASK-3585)

An older server ignores op_key, so the CLI's single same-key retry of a
5xx could apply a patch twice against a server that serves patch but not
keys. The retry now requires the idempotency_keys capability.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-11 11:33:30 -04:00
xarmian 78729db1a9 feat(items): pad item patch --undo, anchored on each edit's context (PLAN-3578 step 3) (#2058)
Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-11 09:28:08 -04:00
xarmian bc3e23d55a feat(collab): a patch to an item open in an editor applies as a narrowed replace (PLAN-3578 step 2) (#2056)
* feat(collab): a patch to an item open in an editor applies as a narrowed replace (PLAN-3578 step 2)

A content-anchored patch to an item a browser editor holds now goes to a
patch-capable tab (one that connected with ?patch_capable=1; an older tab
would read an edits-only request as an empty body). The tab applies it to
its live document as a replace of exactly the top-level blocks it changes,
aligned under the ruled equivalence (equal, or differing only in a link's
title or bold/italic on whitespace; a trailing empty paragraph ignored), so
it merges with typing and leaves cursors in place. It acks with the
canonical before/after; the server records the version with ExternalContent
and answers with the diff and content_state applied_pending_flush. A block
with no equivalent refuses patch_unstable_roundtrip; refusals are counted
in pad_patch_refusals_total{reason}. MCP 0.88 (behavior).

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* test(collab): a room with only a non-capable tab is never sent a patch (PLAN-3578 step 2)

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-11 07:45:12 -04:00
xarmian 0cc033edd8 feat(items): content-anchored patch writes on an item with no live editor (PLAN-3578 step 1) (#2055)
POST /workspaces/{ws}/items/{ref}/patch {edits:[{old,new,line_hint?}],
expected_seq?} replaces exact text in the body. It runs through updateItem,
so it takes every PATCH guard; the body is computed inside the store
transaction from the row it replaces. Each old must occur exactly once;
edits apply in order, all or nothing; every patch writes a version. The
answer carries a unified diff of what changed.

expected_seq does not refuse: a moved seq is applied over when the
anchors still match, and answered rebased with the intervening writes,
read from a seq chain stamped into item activity entries ({prev_seq, seq,
version_id}). complete is decided at runtime, so any write that left no
stamp reads incomplete; a guard test classifies every seq-moving store
statement. Refusals write nothing: patch_anchor_missing,
patch_anchor_ambiguous, patch_room_open (an open editor; step 2).

CLI: pad item patch, pad item show --lines. MCP 0.87 (additive):
pad_item.patch, get lines, three allow-listed codes. The timeline treats
the chain and patch keys as bookkeeping, not a change.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-11 06:20:09 -04:00
xarmian bc329fb7f4 feat(items): agent body writes are version-checked by default, phase 1: count, warn, replace (PLAN-3555) (#2054)
Phase 1 of the ruling that agent content writes carry the version the agent
read. Nothing is refused yet; phase 2 (428 at the agent doors) follows a week
of these counts.

- server: `replace` request member; pad_content_writes_unguarded_total
  {door,kind}; warnings.unguarded_content_write on an agent door's unguarded
  content write; a seq update_conflict on a content write (applier route
  included) carries content_write, changed_at, changed_by_kind and a
  "do not resend your body" message.
- CLI: `pad item update --replace` (refused with a token or without a body);
  a stderr warning on an unguarded body write; the merge line on conflict.
- MCP 0.86 (additive): pad_item.update `replace`; the content-conflict hint
  on both transports; the update description leads with read, edit, write
  with the seq.
- Docs and prompts: SKILL.md (both copies), instructions.md, api.md,
  mcp.md, deployment.md, README, update help, plan and onboard playbooks.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-11 05:29:53 -04:00
xarmian a896edf067 feat(cli): pad auth 2fa setup and disable; disable asks for the password, or a code on an account without one (TASK-403) (#1927) 2026-10-08 22:36:44 -04:00
xarmian 58be45b35e feat(mcp): remote /mcp writes are agent writes named by clientInfo; refused claims say lease_held (BUG-2772, BUG-3496) (#1903)
* feat(mcp): remote /mcp writes are agent writes, named by the client's declared clientInfo (BUG-2772)

A write over remote /mcp reached the handlers with no X-Pad-Agent and
was recorded as the human. It is now an agent write, named by the
client's own MCP clientInfo.name: a modern request's _meta clientInfo,
else the clientInfo its session sent at initialize (remembered by the
Mcp-Session-Id pad issued; mcp-go's session state does not survive
pad's stateless transport), else unnamed; never the human, never a
guessed name. Each initialize logs the declared client (name, version,
protocol, transport; no tokens).

A remote call's default lease holder is that name plus a short session
id (claude-code#3f9a12), inside defaultLeaseHolder so claim and
next/ready agree; two connections of one client no longer share a
lease. Folds TASK-3495. ToolSurfaceVersion 0.77.

Co-Authored-By: Claude <noreply@anthropic.com>

* fix(mcp): a refused claim reaches both transports as lease_held with its holder (BUG-3496)

* test(mcp): register WriteLeaseHeldError in the stdio marker vocabulary table (BUG-3496)

* fix(mcp): a remembered client name is bound to the account that declared it (BUG-2772 codex r1)

* fix(mcp): the remote lease holder carries eight hex digits of the session id (BUG-2772 lead ruling)

---------

Co-authored-by: Claude <noreply@anthropic.com>
2026-10-08 15:15:26 -04:00
xarmian 833e309052 fix(cli): whoami says what a failed check established, and exits non-zero (BUG-2706) (#1901)
* fix(cli): whoami says what a failed check established, and exits non-zero (BUG-2706)

whoami mapped EVERY failed identity check to a rejection ("PAD_TOKEN is
set but the server rejected it." / "Session expired.") and exited 0.
Measured on main: PAD_TOKEN set, server unreachable, "rejected", exit 0.
whoami is the safe-check scripts and agents run first, so a network blip
sent operators to rotate a healthy token, and exit 0 told scripts they
were signed in (chatgpt-review-seed.sh's `whoami || die` could never
fire).

- Only a 401 or 403 is a rejection (PAD_TOKEN: "rejected it (HTTP n)";
  stored session: "session expired").
- Any other status: "could not check your credentials: <url> answered
  HTTP n ... They were not rejected; try again".
- No answer or an undecodable body: "no usable answer from <url>".
- Every failure, and "not logged in", is now an error (exit 1).
- cli.StatusError: a non-2xx with a non-envelope body (a proxy page) used
  to be a plain fmt error with the status only in its text. It keeps the
  same Error() text and now carries the status; cli.HTTPStatus reads it
  from either error type.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* fix(cli): a 403 on whoami's stored session is a refusal, not an expiry (BUG-2706 codex r1)

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-08 15:03:28 -04:00
xarmian ee288cbebd fix: item lists refuse a filter key that names no field (BUG-3480) (#1880)
* fix: item lists refuse a filter key that names no field (BUG-3480)

The item list endpoints read every query parameter they did not know as
a field filter, so a parameter the server never had (the web Library
page's `all`, WebMCP's `collection`) answered 200 with an empty list.
A filter key must now be declared by a schema in scope (the
collection's, or any visible collection's on the workspace-wide list),
or be stored by an item in scope, which is honoured and named in the
X-Pad-Undeclared-Filter-Keys header (printed to stderr by the CLI).
Otherwise 400 validation_error, "invalid list filter ...". A key that
is not a field key is refused too; the store used to drop it and
answer the unfiltered list. WebMCP pad_item:list now lists a
collection through its path. ToolSurfaceVersion 0.73.

Co-Authored-By: Claude <noreply@anthropic.com>

* test: type the listByCollection mock so svelte-check can index its calls (BUG-3480)

---------

Co-authored-by: Claude <noreply@anthropic.com>
2026-10-08 10:43:33 -04:00
xarmian 99aac1687b feat(cli): pad library diff and pad library update for built-in conventions and playbooks (TASK-3462 U3c) (#1875)
* test: pad library diff/update and the builtin_update capability (TASK-3462 U3c, red)

* feat(cli): pad library diff and pad library update for built-in conventions and playbooks (TASK-3462 U3c)

- diff shows what Pad's library changed since the item was made, what the
  user changed (or a plain comparison when that is unknown), and the
  settings an update would replace.
- update takes the library's text, guarded by the seq read just before. It
  refuses content_pending_flush unless --overwrite-pending-edits, explains
  update_conflict, and reports a current item without sending.
- The server advertises builtin_update; both commands refuse without it,
  since an older server's bare 404 reads like not_builtin.
Not on MCP, per the design.

* test: pad library diff/update codex r1 findings (TASK-3462 U3c, red)

* fix(cli): pad library diff/update codex r1 findings (TASK-3462 U3c)

- The JSON diff carries the current text from a server that does not send it.
- A no-op under --format json is a JSON result.
- A failed capabilities probe says so; it is no longer reported as an older
  server.
- An update prints the write's warnings: applied to an open editor, and
  pending edits pruned.
- content_pending_flush is rendered by the shared helper, which names
  set-aside rows apart from an open editor's; the flag's help covers both.
- The diff names an end-of-file newline change.

* test(cli): built-in diff keeps large numbers and refuses a mixed-version fallback (TASK-3462 U3c, codex r2, red)

* fix(cli): built-in diff keeps numbers as written and refuses a fallback from another version (TASK-3462 U3c, codex r2)

BuiltinText decodes its fields keeping numbers, and the fallback read of the
item does the same, with status and nulls dropped to match the server's
current. A fallback whose seq differs from the state's is refused instead of
mixed in.

* test(cli): built-in update reports undeclared fields (TASK-3462 U3c, codex r5, red)

* fix(cli): built-in update reports undeclared fields like any item update (TASK-3462 U3c, codex r5)
2026-10-08 05:05:04 -04:00
xarmian 15c9f76366 feat: archived collections can be listed, restored and undone; the archive confirm shows the count (TASK-2189) (#1874)
* feat: archived collections can be listed and restored (TASK-2189, server, CLI, MCP v0.72)

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* feat(web): archive shows the item count, guards big collections, and can be undone or restored (TASK-2189)

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* fix: list-archived is read-only, an unknown count needs typing, instructions say v0.72; store tests on both dialects incl. a restore race (TASK-2189)

codex r1.

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS

* test: README tool-surface version 0.72; classify the archive Undo's restore continuations (TASK-2189)

Claude-Session: https://claude.ai/code/session_01Q9WssCjFuHjSfLABoW4tmS
2026-10-08 03:59:26 -04:00
xarmian c17865462f feat: built-ins record their origin; an item made from one can be offered Pad's current text (TASK-3462 U1+U2) (#1852)
* feat: built-ins record their origin, and an item made from one can be offered Pad's current text (TASK-3462 U1+U2)

U1: every convention and playbook Pad ships has a stable key and a content
hash; template seeding and the new server-side POST /library/activate record
{key, seed hash, seed text} in item_builtin_origin (migration 128 / pg 102).
CLI, remote MCP and the web Library page activate through the endpoint;
seeded and activated copies of an entry store the same fields. Export/import
carry the origin; copies get none; a request body cannot claim one.

U2: GET /items/{ref}/builtin derives current / update_available / diverged /
unknown_origin / unknown_entry; POST /items/{ref}/builtin/update takes the
library text through the ordinary PATCH path (expected_seq required, status
and title untouched, a forced version row keeps a diverged item's edits);
GET /builtins lists states in one join, showing only fully visible
collections.

* fix: the origin's seed text is NUL-protected (trigger migration 129); the MCP activate test asserts the endpoint call; activation follows the declared kind server-side (TASK-3462)

* fix: the built-in seed moves in the update's own transaction; a NUL-bearing imported origin is skipped; the listing computes visibility once; numbers hash by value (TASK-3462, codex r1)

* fix: on the applier path the built-in seed is recorded only after the apply confirms; a library change that only drops a field is offered (TASK-3462, codex r2)

* fix: a field the library added that the user already set reads diverged; an update clears convention metadata the library dropped (TASK-3462, codex r3)

* test: the lifecycle test finds the imported item by slug (the copy shares its title); ScanNUL's cost figures count the two new columns (TASK-3462)

* test(e2e): Library activate posts the entry to /library/activate and the item records its built-in origin (TASK-3462)
2026-10-07 06:40:06 -04:00
xarmian 8c8deeeb89 fix: an invite asks an existing user instead of adding them; decline; CLI invitations (BUG-2136 U1) (#1831)
* test(server): an invite asks an existing user; re-invite replaces; decline by id and by code (BUG-2136, red)

* fix(server): an invite asks an existing user instead of adding them; a re-invite replaces the pending invitation; decline by id and by code (BUG-2136)

* feat(cli,mcp): pad workspace invitations/accept/decline; invite output says pending; ToolSurfaceVersion 0.66 (BUG-2136)

* test(e2e): invitees accept their invitation before the specs use the membership (BUG-2136)

* test(store): concurrent re-invites of one address leave one pending invitation (BUG-2136)

* test(store): an accept that loses to a decline adds no membership (BUG-2136, codex r1, red)

* test(server): an unverified invitee can decline by code, as they can accept (BUG-2136, codex r1, red)

* fix: an accept that loses to a decline or replace adds no membership; decline by code passes the verified-email gate; honest oracle comment (BUG-2136, codex r1)

* fix(server): the verified-email exemption matches exactly /invitations/{code}/accept|decline (BUG-2136, codex r2)

* test(server): drop the plan-limit harness's now-unused newUser (BUG-2136)
2026-10-06 12:16:32 -04:00
xarmian 67d06fdf81 fix(auth): a CLI session is never a browser cookie, and sign-in refuses a cross-site form (BUG-3350) (#1747)
(a) Sessions did not record how they were issued, and SessionAuth accepted
any padsess_ token from a cookie as a cookie session. isBearerAuth is
decided by transport, so an admin's CLI session sent as a Cookie picked up
the cookie-only platform-admin bypass that bearer use is denied (BUG-1616).
- Migration 105/079 adds sessions.kind ('web' | 'cli'). It backfills 'cli'
  from device_info 'cli-browser-auth' (lead's ruling: no forced re-login;
  older CLI password logins stay 'web' until they expire).
- The kind comes from the device label at creation.
- The CLI sends X-Pad-Client: cli, so its password and 2FA sign-ins mint a
  'cli' session and set no cookie. Rotation keeps the replaced session's
  kind.
- SessionAuth, validateSessionCookie and requestSessionInfo's cookie path
  accept only a 'web' session as a cookie. A CLI session still works as
  the bearer it is.

(b) /auth/login (and 2FA login-verify) were CSRF-exempt and decoded JSON
whatever the Content-Type, so a cross-site text/plain form could sign the
victim into the attacker's account. A sign-in must now be
application/json (415 otherwise), and an Origin the browser names must be
this server (its Host or base URL) or an allowed CORS origin, including the
localhost defaults the dev server uses (403 otherwise). Headless clients
send no Origin. An E2E leg pins the web app's own login form sending JSON.

Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC
2026-10-02 20:48:37 -04:00
xarmian a2e7768035 fix(comments): a deleted comment with replies leaves a tombstone (BUG-3252) (#1675)
* fix(comments): a deleted comment with replies leaves a tombstone (BUG-3252)

Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC

* test(comments): backdate so a tombstone moving updated_at is seen (BUG-3252)

Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC

* chore(mcp,store): v0.59 instructions heading, NUL baseline for comments.deleted_at (BUG-3252)

Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC

* fix(comments): reactions wait for a tombstoning delete; unreact on a tombstone answers 409 (BUG-3252, codex r1)

Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC

* fix(comments): unreact racing a tombstoning delete answers 409, not 404 (BUG-3252, codex r2)

Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC
2026-09-30 00:41:20 -04:00
xarmian 237333681b feat(attachments): attach binds an unattached upload to an item, so its share renders it (TASK-2247) (#1652)
The July audit's share-page broken-image finding was fixed by BUG-2389 and
TASK-2637: the share byte endpoint serves variants of attachments the
shared item OWNS. What was left: an image uploaded with
`pad attachment upload -` (item_id NULL) and then embedded is never owned,
so its share shows the placeholder. A census of this workspace found 4
such refs out of 13, all from that path.

Lead ruling (option C): fix it explicitly, with no implicit binding on
content writes.

- POST /workspaces/{ws}/attachments/{id}/attach {item}. It binds a live,
  unattached original in this workspace, and its live variants, to an
  item. Every UPDATE requires item_id IS NULL, so an attached row is never
  moved, and the bind is exclusive with the never-attached GC claim. The
  item is pinned like CreateAttachmentForLiveItem.
- Authorization: the caller can see and edit the item, and uploaded the
  attachment or is a workspace owner. An attached row answers 409 to a
  caller who can see its owner, and the shared 404 to anyone else.
  Restricted members and guests cannot read unattached rows, so they get
  the 404. That closes the case where a guest binds an id they know to an
  item they can edit and publishes it through its share.
- The attachment_attach capability. `pad attachment attach <id> <item-ref>`
  refuses against a server that does not advertise it, because an older
  build's bare 404 would read as "attachment not found".
- The `upload -` help text, the attachment group help, both skill copies
  and CLAUDE.md say an unattached image does not render on share pages.
- No MCP surface: pad_attachment has no upload.

Tests: 12 server/store tests, including an end-to-end share leg (404
before, variant bytes after), and 9/9 mutants killed. CLI capability
gate: 2 tests, mutant killed. e2e: the share renders the image after
attach; with attach made a no-op it goes red at "attached: no
placeholder".

Claude-Session: https://claude.ai/code/session_01NidgPePY7UvHcEJCMkD2Qz
2026-09-28 19:25:55 -04:00
xarmian 9b7e0832ac fix(comments): deleting a comment that has replies answers 409 comment_has_replies instead of 500 (BUG-3252) (#1608)
* fix(comments): deleting a comment that has replies answers 409 comment_has_replies instead of 500 (BUG-3252)

comments.parent_id references comments(id) with no ON DELETE, so deleting a
parent with replies failed the foreign key inside the store. Every door said
"internal error", the web delete button included, and nothing was deleted.

Per the lead's ruling (reversible with Dave's veto), the store now refuses
by name. The DELETE carries a NOT EXISTS on replies, so the refusal is part of
the statement itself, and a zero-row result is told apart by counting.
Nothing is deleted. Every door reports it:

- Both server routes answer 409 comment_has_replies with details
  {comment_id, reply_count}.
- The CLI root writes a structured marker, so stdio MCP reports the code
  and hint rather than server_error.
- Remote MCP passes it through the 409 allow-list with the same hint.
- The web timeline shows the server's message in place of "An internal
  error occurred".

MCP 0.58 (behavior bump, on the v0.45 grounds). Cascade versus tombstone
stays an open product decision; this refusal is the floor under either.

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* fix(comments): a delete whose replies vanish between statements retries instead of reporting not-found (BUG-3252, codex r2)

Under Postgres READ COMMITTED the conditional DELETE and the reply count take
separate snapshots, so a reply the DELETE saw could be gone by the count, and
a comment that still existed was reported missing. The zero-row branch now
rechecks that the comment exists and, if it does, runs the conditional
delete again, at most three times.

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* test(comments): pin the replies refusal on Postgres (BUG-3252)

The server and MCP tests run on SQLite, so the conditional DELETE had never
executed on Postgres. This test runs there (make test-pg). Against the bare
DELETE mutant it fails with comments_parent_id_fkey, which is the original
defect.

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9
2026-09-27 09:11:48 -04:00
xarmian 0f1069e9df feat(comments): agents can edit and delete comments from the CLI and every MCP transport (TASK-2695) (#1607)
Web users could edit and delete comments since PLAN-1662. Agents, who write
most comments, could only append corrections.

- Server: new item-scoped routes, PATCH/DELETE
  /workspaces/{ws}/items/{ref}/comments/{id}. They answer 404 unless the
  comment is on {ref}, then run the existing handlers unchanged (edit is
  author-only, delete needs item-edit). GET /server/capabilities advertises
  them as item_scoped_comment_writes.
- CLI: `pad item comment-edit <ref> <comment-id> [message|--stdin]` and
  `pad item comment-delete <ref> <comment-id>`. Both refuse to send to a
  server without the capability, whose bare 404 would otherwise read as
  "comment not found". `pad item comments` now prints each comment's id,
  plus "edited" once its body has changed.
- models.Comment serialises a derived `edited` bool, true when
  updated_at > created_at (the web timeline's rule).
- MCP 0.57: pad_item edit-comment / delete-comment and a comment_id param,
  on stdio, remote /mcp and WebMCP. All three use the item-scoped routes,
  so the check that the comment is on ref happens on the server for every
  transport. Remote packages a delete's 204 as the CLI's JSON.

Found along the way, and out of scope: deleting a comment that has replies
answers 500, because parent_id has no ON DELETE. Filed as BUG-3252.

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9
2026-09-27 07:59:11 -04:00
xarmian 2d51308d39 fix(collab): a schema-version rebuild sets unflushed edits aside instead of deleting them (BUG-3244 A) (#1598)
* wip(collab): the schema-version rebuild sets unflushed edits aside and the item stays marked (BUG-3244 A)

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* wip(server): set-aside rows refuse every content write and restore unless overwrite_pending_edits, which discards and reports them (BUG-3244 A)

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* wip: set-aside read/discard endpoints and pad item set-aside; census and migrated-table entries (BUG-3244 A)

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* wip(store): set-aside edits travel in the workspace bundle; the migrate gate asks the op-log only (BUG-3244 A)

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* wip: set-aside advice branches at every door that names a remedy; mark-only doors share one helper (BUG-3244 A, ruling 1)

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* test(cli): set-aside notices name the right remedy (BUG-3244 A)

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* docs: the rebuild sets unflushed edits aside; freeze reason, API docs and op-log prose follow (BUG-3244 A)

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* test(web): identity-gate rows re-reviewed for the set-aside reason threading (BUG-3244 A)

The edits in each covered unit are a pure pendingEditsReason(e) argument or
string branch, or a reason passed to the dialog; no await, write or fence
changed. Three anonymous-unit matchers follow the new call text, and the
keepalive failure row lists the pure classifier in may.

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* test(server): a restore override counts the set-aside rows it discarded (BUG-3244 A)

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* fix(store): the rebuild sets aside the rows its DELETE returned, so an append between choosing and clearing is not lost (BUG-3244 A, codex r1)

On Postgres each statement takes its own snapshot and the setup lock does
not stop a connected peer appending, so a row committed between the old
INSERT ... SELECT copy and the DELETE was deleted without being set aside.
The kept rows are now chosen from DELETE ... RETURNING. A test hook in the
gap drives a Postgres leg; a mutant that chooses before the gap loses the row.

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* test(web): playbook save row re-reviewed after the BUG-3230 U3 rebase (BUG-3244 A)

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* fix(store): the set-aside move's first statement is the DELETE, so SQLite never upgrades a stale read snapshot (BUG-3244 A, codex r2)

Reading the watermark first took a read snapshot on SQLite; a concurrent
append would then make the DELETE fail with SQLITE_BUSY_SNAPSHOT instead of
waiting. The watermark is now read after the DELETE, where a later value is
only more accurate.

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* feat(mcp): ToolSurfaceVersion 0.56, content_state gains superseded_set_aside (BUG-3244 A)

The value reaches pad_item get / full list, pad_playbook run and the item
resource's line above the body, and its remedy differs from
applied_pending_flush (opening the item will not restore the edits). An
additive bump with a version.go entry; README, CLAUDE.md and the MCP
instructions follow. Read/discard of set-aside rows stays off the catalog.

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9

* test(server): after a bumped rebuild the next open is granted the seed once and the item stays superseded (BUG-3244 A x BUG-3240)

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9
2026-09-27 05:40:55 -04:00
xarmian a537ba84e2 fix(auth): an admin-created registration mints no session, so creating an account no longer hands the admin a live credential for the new user (BUG-3232) (#1581)
handleRegister called createAuthSession on every path, including an admin
creating someone else's account. That minted a live 7-day session for the
NEW user and returned its token to the admin. For a cookie caller it also
set that token as the admin's cookie, and since BUG-3011 that destroyed the
admin's own row. Nobody held the new session, because the new user signs in
on their own: it was an orphaned impersonation credential.

The admin-created path (no invitation, admin caller) now answers 201 with
the user only: no session, no cookie, and no token. The audit event and
autoCreateWorkspace run as before. Invitation and cloud self-serve signups
are the new user signing up and keep their session; tests pin both.

The UI symptom BUG-3232 was first filed for is unreachable: /register and
/join/[code] never post a register with a live session. Also removes the
dead cli.Client.Register, which had no callers.

Claude-Session: https://claude.ai/code/session_016PXRzXhokr61CLbbu3Txj9
2026-09-26 15:27:50 -04:00
xarmian b459892d8b fix(search): the collection filter resolves exact-first per workspace in scope, so a collection named task is no longer shadowed by tasks (BUG-2659, BUG-2839) (#1576)
* fix(search): the collection filter resolves exact-first per workspace in scope, so a collection named `task` is no longer shadowed by `tasks` (BUG-2659, BUG-2839)

/search matched its collection filter as a literal slug, so shorthand
found nothing and both clients normalised it first, which rewrote `task`
to `tasks` even where a `task` collection existed. The handler now
resolves the filter with resolveItemCollectionSlug in every workspace in
scope and filters the store on the resulting collection IDs; one slug
cannot express that, since the same input can resolve differently per
workspace. The capability endpoint advertises
search_collection_resolution, and the CLI sends the name as typed only
to a server that does. The in-process remote MCP mapper stops
normalising outright.

Also corrects cascadeTitleRename's doc comment, which named
links.ReplaceTitle for a cascade that rewrites through
links.RewriteBracketsAt (BUG-2839).

* chore(mcp): tool surface 0.55 — pad_item.search's collection resolves exact-first per workspace (BUG-2659)

Lead-ruled BEHAVIOR bump on the v0.36/v0.40 grounds: in a workspace
holding both task and tasks, the same call now answers from task.
2026-09-26 12:20:58 -04:00
xarmian 919c2975c2 fix(items): note and decide append server-side under the write lock, so they no longer revert a concurrent field write (BUG-3056) (#1458)
* wip(BUG-3056): server-side note/decide append, capability-gated CLI

* test(BUG-3056): server append tests

* test(BUG-3056): CLI capability gate tests

* test(BUG-3056): store append tests on both backends; CLAUDE.md API note

* fix(BUG-3056): keep the remote /mcp door's created_by label (codex r1)

* docs(BUG-3056): CLAUDE.md names the remote door's author label
2026-09-23 07:46:45 -04:00
xarmian 969955c810 fix(mcp): a 413 is too_large on both transports, not server_error (BUG-2829) (#1455)
* fix(mcp): a 413 is too_large on both transports, not server_error (BUG-2829)

Claude-Session: https://claude.ai/code/session_01RYiqbqXmxQMoKHsGm8B77N

* docs(mcp): tool surface 0.45 in instructions, README and CLAUDE.md (BUG-2829)

Claude-Session: https://claude.ai/code/session_01RYiqbqXmxQMoKHsGm8B77N
2026-09-23 05:17:16 -04:00
xarmian 88a5af1a74 fix(mcp): stdio passes "-"-leading free text as text, and reports argv refusals and 429s with the right code (BUG-3142, BUG-3147) (#1444)
* fix(mcp): stdio sends positionals behind "--", so free text starting with "-" is no longer parsed as a flag (BUG-3142)

BuildCLIArgs emitted positionals first with no terminator, so cobra read
`item search "-ship it"` as an unknown shorthand flag and refused the call
before the command ran, on all 12 free-text positionals the stdio transport
carries. It now emits every flag (root flags, --workspace, --format
included) and then `--` and the positionals; the remote door ignores this
vector. Pinned against the real cobra tree through each command's own flag
parser, including a positional that is literally "--workspace".

Claude-Session: https://claude.ai/code/session_01RYiqbqXmxQMoKHsGm8B77N

* fix(mcp): stdio reports an argv refusal as validation_failed, with its message, instead of a retryable server_error (BUG-3142)

Two defects on one path. The root command's flag-error hook prints cobra's
usage block BEFORE the "Error:" line, and stripCobraUsageBlock truncated at
"Usage:", so a flag-parse refusal reached the classifier as an empty string.
And no stderr pattern matched cobra's or pflag's argv refusals at all. The
strip now stops at a following "Error:" line, and one anchored pattern covers
the parse-time family enumerated from cobra v1.10.2 and pflag v1.0.10.

Pinned end to end: the test binary re-executes as the real CLI under
ExecDispatcher, so the real stderr ordering is what gets classified.

Claude-Session: https://claude.ai/code/session_01RYiqbqXmxQMoKHsGm8B77N

* fix(mcp): a 429 reaches a stdio caller as rate_limited with the server's wait, and the tool surface is 0.42 (BUG-3147, BUG-3142)

The CLI printed only the limiter's message, which no stderr pattern matched,
so every 429 reached a stdio MCP caller as a retryable server_error while the
remote transport said rate_limited. The CLI now writes the structured marker
line at its root for a 429 on any command, carrying Retry-After as
details.retry_after_seconds, and stdio lifts it.

ToolSurfaceVersion 0.42 covers this and BUG-3142's classification change in
one entry: both change the code a stdio caller receives, and nothing else.

Claude-Session: https://claude.ai/code/session_01RYiqbqXmxQMoKHsGm8B77N

* test(cmd/pad): the stdio argv test restores the root flag globals it parses into (BUG-3142)

Claude-Session: https://claude.ai/code/session_01RYiqbqXmxQMoKHsGm8B77N
2026-09-22 22:49:36 -04:00
xarmian 6fdd8816f3 feat(playbook): match free text to an active playbook via the decision provider (TASK-3120) (#1429)
* feat(server): POST /playbooks/match — typed-decision Choice over active playbooks (TASK-3120)

PLAN-3114 unit 5. A synchronous, read-only endpoint: given free text, asks
the workspace's typed-decision provider which active (non-draft,
non-deprecated) playbook it best matches, with a reserved "none" option so
unrelated text gets an honest answer instead of a forced pick — and, as a
side effect, keeps a workspace with exactly one active playbook askable
(decision.Question.Validate needs >=2 Choice options).

- decision.Runner gains a nil-safe Provider() accessor: this endpoint needs
  a plain synchronous Ask, not the owed-jobs pipeline Evaluate drives.
- No provider configured -> 404 decision_provider_unavailable (callers fall
  back to slug/trigger routing). A provider error or an out-of-set answer
  the provider was never offered -> 502 decision_provider_error, distinct
  from the 404 case so a caller can tell "try again" from "not configured".
  Zero active playbooks -> 200 with a stated reason, no provider call.
  Over the provider's 255-option ceiling (including "none") -> refused
  rather than silently dropping playbooks and answering from an
  incomplete set.
- listPlaybookItems is factored out of handleListPlaybooks so list and
  match share one visibility-scoped item source and can't drift on which
  playbooks a caller can see.
- 30s timeout on the synchronous provider call, tighter than the
  provider's own worst-case retry budget (~330s) since an HTTP caller
  blocks on this one directly, unlike the async decision tick.
- content_state_population_test.go's BUG-3033 sweep gets a new ruling: the
  PlaybookSummary call here feeds the provider prompt only, never the
  response, so there's no reader-facing text to mark.

Claude-Session: https://claude.ai/code/session_01ByMjAhvdWgbAWWeGE9jwWd

* feat(cli): pad playbook match "<text>" (TASK-3120)

CLI + client-method half of PLAN-3114 unit 5 — POST /playbooks/match.
Table output prints the matched ref/title (or "none"), confidence, model,
and a probabilities table sorted descending; --format json passes the
response through unmodified. Read-only, side-effect-free.

Claude-Session: https://claude.ai/code/session_01ByMjAhvdWgbAWWeGE9jwWd

* docs(skill): route to playbook match as rung 3, offer-only (TASK-3120)

PLAN-3114 unit 5's skill half. Exact invocation-slug match and trigger
match stay rungs 1-2; match is consulted only when the user is plainly
asking for a procedure/workflow and both of those missed — never on
ordinary conversation, since every call spends provider money. Any match
returned is offered, never auto-run, at any confidence: TASK-3137's replay
of this same provider's attention question set found no validated
threshold, so nothing here invents one for this question either. A 404
(no provider configured), a "none" choice, or any other error falls back
silently to today's slug/trigger-only behavior.

Claude-Session: https://claude.ai/code/session_01ByMjAhvdWgbAWWeGE9jwWd

* chore(mcp): de-indent padItemToolDescription's continuation lines (TASK-3120)

Whitespace-only — git diff -w on this file is empty. The description's
continuation lines carried 18 leading spaces purely for visual alignment
under each action's "  name — " bullet in the Go source; that padding is
emitted verbatim into the tools/list JSON, where it conveys nothing an
LLM reading the tool description gets any value from.

De-indented by exactly 14 spaces on every line that had >= 18 (all 116 of
them, uniformly, since the file carries only three indentation levels:
0, 2, 18 — no deeper nesting to preserve a relative offset for).
Continuations now land at 4 (bullet's 2 + 2), so a reader can still tell
which action a line belongs to; a 1-space collapse would have inverted
that (continuation LESS indented than its own bullet).

tools/list: 55290 -> 53666 bytes (-1624). initialize: unchanged at 24530
(it carries no tool descriptions). Frees headroom against the 55296
budget for the pad_playbook.match action landing in the next commit —
budget constants themselves are untouched, per standing instruction.

Claude-Session: https://claude.ai/code/session_01ByMjAhvdWgbAWWeGE9jwWd

* feat(mcp): pad_playbook.match action, ToolSurfaceVersion 0.39 -> 0.41 (TASK-3120)

PLAN-3114 unit 5's MCP half, landing on top of the whitespace-only
catalog_item.go trim (previous commit) so this stays within the
tools/list budget with room to spare.

- catalog_playbook.go: new `text` param, new `match` action
  (passThrough — the CLI's positional arg is named "text", matching
  this tool's param, so no custom shaping is needed) plus a
  description bullet in padPlaybookToolDescription.
- tool_surface.go: `match` marked read-only (nothing stored, no job
  enqueued).
- dispatch_http_routes.go: `playbook match` routeSpec (POST, flat
  {text} body) so the remote /mcp transport can dispatch it in-process.
- version.go: ToolSurfaceVersion 0.39 -> 0.41. 0.40 is reserved for
  PR #1427 (the 0.32/0.33 precedent — a gap is cheaper than a
  collision). 0.41's own entry: pure ADDITIVE bump, same disposition
  as 0.13/0.28/0.11 — nothing existing moved.
- instructions.md, README.md, CLAUDE.md: version headings + the
  pad_playbook bullet/table-row/changelog-sentence updated per the
  drift tests (TestInstructionsMDCoversEveryCatalogAction,
  TestReadmeTableCoversEveryCatalogAction, the two version-match
  tests). instructions.md's addition is intentionally terse ("`match`
  finds a playbook from text.") — it's embedded in the `initialize`
  handshake payload, which has its own 24576-byte budget and had only
  46 bytes of headroom; a fuller explanation lives in the tools/list
  param/action docs instead, which have budget to spare after the trim.
- catalog_readonly_test.go, dispatch_http_parity_test.go: new
  `pad_playbook.match` entries in three hand-built fixture maps
  (expected cmdPath ×2, a hand-rolled cmdhelp stub, and the shared
  parity-drive fixture input) so the existing bijection/parity/dispatch
  guards actually exercise the new action instead of skipping it.

Bytes measured (go test ./internal/mcp -run Budget -v):
  tools/list:  55290 (baseline) -> 53666 (after the trim commit) ->
               54805 (after this commit) — 491 bytes of headroom left
               against the 55296 budget.
  initialize:  24530 (baseline, unchanged by the trim) -> 24574 (after
               this commit) — 2 bytes of headroom against the 24576
               budget. Flagged in the implementer report: this is now
               as tight as tools/list was before the trim, and nothing
               in this unit addresses it.

Claude-Session: https://claude.ai/code/session_01ByMjAhvdWgbAWWeGE9jwWd

* fix(server,decision): don't leak provider errors, classify oversized requests, fix none's wording (TASK-3120)

Lead's shallow-pass findings on cd7a41ed, applied after the MCP commit.

F1 (disclosure): the provider-error path answered with err.Error()
verbatim. typesafe.go's client surfaces the provider's raw 4xx body in
that string (APIError.Error()), which is the INSTANCE's own account
state with typesafe.ai — key validity, quota, billing wording — not
anything about the caller's request. This endpoint requires only
viewer access, so any workspace member could read it. Now logged
server-side in full (slog, workspace + err) and answered with a fixed
message plus a coarse details.reason ("timeout" for a context
deadline, "upstream" otherwise) via a new writeDecisionProviderError
helper. Test constructs a fake error containing a secret-looking
string and asserts it never reaches the response body.

F2 (misclassification): the request budget is 32000 tokens
(~80000 chars). At a couple hundred active playbooks with realistic
summaries, the Choice question's options alone can exceed it before
any state is even added — or leave no room for the input text. Both
were plain fmt.Errorf with no sentinel, so they fell into the generic
"provider failed" 502 path, telling a caller "try again" for a
request that will never fit no matter how many times it's retried.
decision/typesafe.go gains ErrRequestTooLarge (wrapped with %w onto
both pre-send refusals; existing message text unchanged, just
appended-to) alongside the existing ErrMaxTokensExceeded (the
provider's own after-the-fact refusal of a request fitState let
through) — both now map to a distinct 400 match_request_too_large.
New decision-package unit test builds a realistic 254-option Choice
(title + near-cap summary + trigger + slug per option, mirroring what
playbook-match could plausibly send) and confirms fitState refuses it
before the fake HTTP handler is ever called; server-side table test
covers both sentinels through the fake provider.

F3 (nit): the "none" option's description read "...listed above",
but Options is an unordered map — nothing puts them "above" it.
Reworded to "...any of the other options' procedures"; the pinned
exact-prompt test updated to match.

Also (lead's separate MCP-round instruction): decision.go's
maxChoiceOptions is now exported as MaxChoiceOptions, and the
server's over-limit refusal reads that constant instead of a copied
`255` literal, so the two ceilings cannot drift apart.

go test ./internal/decision/... ./internal/mcp/... ./internal/server/...
./cmd/pad/... ./internal/cli/... — all green. golangci-lint run ./...
— 0 issues. Full `go test ./...` run separately; final line in the
report.

Claude-Session: https://claude.ai/code/session_01ByMjAhvdWgbAWWeGE9jwWd

* chore(mcp): cut pad_playbook.match's tools/list text to the approved +292 variant (TASK-3120)

The lead's shape-(a) approval was for the measured "+292 documented"
prototype, not the fuller wording ae38353c actually shipped
(+1139 bytes) — the trim commit exists to pay for the approved
action text, not to fund arbitrary new prose. Cut the `text` param to
one sentence (the 404-fallback advice lives once, in the action
bullet, not repeated in the param) and the `match` action bullet down
to four lines at consistent bullet+2 continuation indentation,
matching the rest of padPlaybookToolDescription's style (the previous
wording had drifted to 20-space continuation on its last two lines).

tools/list: 53666 (post-trim baseline) -> 54023 (+357, close to the
~300 target — wording differs from the original prototype's exact
text, so an exact match isn't expected). initialize: unchanged at
24574 (this file's bullet is tools/list-only; instructions.md is a
separate file, untouched here).

Claude-Session: https://claude.ai/code/session_01ByMjAhvdWgbAWWeGE9jwWd

* fix(server): don't overclaim writeDecisionProviderError's timeout reason (TASK-3120)

The doc comment said "timeout" covered a cancelled caller request too,
but context.Canceled is a distinct error from context.DeadlineExceeded
and errors.Is(err, context.DeadlineExceeded) does not match it — that
case actually falls through to "upstream", contradicting what the
comment claimed. Narrowed the comment to deadline-only (the preferred
fix per review): a cancelled caller's own request also never reads
this response body, so the distinction was moot as well as wrong.
Code was already correct; only the comment overclaimed.

Claude-Session: https://claude.ai/code/session_01ByMjAhvdWgbAWWeGE9jwWd

* fix(cli,skill): pad playbook match needs -- before dash-led text (TASK-3120)

Codex round 2 finding on f31d5d64. Text starting with "-" (a dash-led
sentence, or literal text like "-ship it") is parsed as a flag by
cobra's default scanner, on both the CLI and stdio MCP (which shells
out to this same command). Pre-existing and class-wide — `pad item
search "-x"` fails the same way — so the general stdio fix across
every command is filed as BUG-3142 rather than done here; BuildCLIArgs
is untouched.

This command's own help now shows the workaround: an Example section
with `pad playbook match -- "-ship it"`. skills/pad/SKILL.md's rung-3
routing entry calls it the same way, with a one-line reason, and notes
the MCP form is unaffected (a structured `text` param, not a CLI
token).

New CLI test asserts BOTH directions: `playbook match "-ship it"`
(no --) fails at cobra's flag parser and never reaches the server;
`playbook match -- "-ship it"` succeeds and the server receives the
text with its leading dash intact. Ran both legs — see the test.

Claude-Session: https://claude.ai/code/session_01ByMjAhvdWgbAWWeGE9jwWd

* fix(skill): local stdio MCP is not exempt from the leading-dash flag parse (TASK-3120)

Codex round 4 finding. The rung-3 routing entry claimed the MCP form of
match was "unaffected" by BUG-3142, but that's only true for remote
/mcp, which keeps `text` a structured param. Local stdio MCP shells
out to `pad playbook match`, turning `text` into a CLI positional via
BuildCLIArgs (dispatch.go:435) — the same flag parser, the same bug.
Corrected: remote /mcp is safe as-is; local stdio MCP still hits it and
should prefer the CLI's `--` form when the text starts with `-`.

Claude-Session: https://claude.ai/code/session_01ByMjAhvdWgbAWWeGE9jwWd

* fix(cmdhelp): the example validator's flag scan must stop at "--" (TASK-3120)

CI red on #1429 (a2a5a853), Go/Go-PG/Nix all failing the same way:
TestRealPadTree_ExampleDriftValidator flagged the new `pad playbook
match -- "-ship it"` example's own dash-led TEXT ARGUMENT as an
unknown flag `--ship it`. Cobra stops flag parsing at a lone "--" —
that's the whole point of the token — but validateExample's scan
treated "--" as just another flag-shaped token: TrimLeft reduced it
to an empty name, which fell into the "skip, keep scanning" branch
instead of stopping the scan. Everything after "--" kept getting
flag-checked, so the terminated example's own positional text was
misread as a flag.

Fixed by checking `t == "--"` BEFORE the dash-stripping and breaking
the scan there, per review. A lone "-" (the stdin convention, e.g.
`pad item import -`) is a different token — it still reaches the
dash-stripping, still reduces to an empty name, and still just
`continue`s past — so it does not terminate the scan.

Three new unit tests in internal/cmdhelp cover all three legs: (a) a
dash-led positional after "--" produces no finding, (b) an unknown
flag BEFORE "--" is still caught — the break cannot hide drift ahead
of the terminator, and (c) a lone "-" does not stop the scan (an
unknown flag after it is still caught). Manually re-ran (a) with the
break removed to confirm it goes red without the fix, then restored
the real fix — ran, not just described: FAIL "a dash-led positional
after -- should not be reported as an unknown flag" without the break,
PASS with it.

The playbook match example itself is unchanged.

Claude-Session: https://claude.ai/code/session_01ByMjAhvdWgbAWWeGE9jwWd
2026-09-22 11:28:57 -04:00
xarmian 5fe478b7d0 fix: refuse a token-guarded content write over unflushed tab edits (BUG-3133) (#1423)
expected_seq guards the row, and a browser tab's typing is not in the row
until the tab flushes. So a content PATCH carrying a current token replaced
those edits: through the applier's setContent with a tab open, and with no
tab open the direct path's PruneItemOpLogTx deleted them, and they existed
nowhere else.

A content write that carries expected_seq or expected_updated_at is now
refused with 409 content_pending_flush while content-bearing op-log rows sit
above the flush watermark. The check is composed into the existing precheck,
so the direct, applier and collab-disabled paths all inherit it, and runs in
the write's own tx after the token check (a stale token still answers
update_conflict). It has its own code because re-reading returns the same
row and seq. overwrite_pending_edits lifts it on the API, the CLI
(--overwrite-pending-edits; item edit --force sets it on the save) and MCP
on both transports, with a shared hint that does not say re-read and retry.

A tokenless write is unchanged, except that a direct write now reports
warnings.pruned_pending_edits when its prune deleted such rows (the CLI
prints it to stderr).

MCP ToolSurfaceVersion 0.39: a behavior bump with one additive param.

Claude-Session: https://claude.ai/code/session_01X4uYKs5ZPF28eCWfm8VPvE
2026-09-22 00:42:02 -04:00
xarmian d2973b24d7 feat(items): expected_seq — an OCC token that can tell two same-second writes apart (BUG-3037) (#1351)
* feat(items): expected_seq — the strong OCC token (BUG-3037)

* test(items): the same-second race, with each token (BUG-3037)

* test(cli): the summary shape carries the seq token (BUG-3037, matrix hole)

* test(web): the pane sends the seq token, with the cached-row arm (BUG-3037)

* test(web): the OCC retry re-reads the token through tokenOf (BUG-3037, matrix hole)

* docs: CLAUDE.md carries the v0.34 tool-surface entry (BUG-3037)

* test(e2e): the pane's field write is guarded by seq (BUG-3037)

* fix(mcp,webmcp): forward the OCC token and refuse a fractional seq (codex round 1)

* test(items): the reproduction no longer races the wall clock (BUG-3037)

* fix(items): seq decides when both OCC tokens are sent (codex round 2)

* fix(cli): --expected-seq is sent by presence, so an explicit 0 is not dropped (codex round 3)

* fix(cli): render a seq conflict with the token the caller sent (codex round 4)

* docs(mcp): agent instructions recommend expected_seq (codex round 5)
2026-09-13 22:38:15 -04:00
xarmian b437cc582d feat: item reminders — the fire-at-an-instant primitive, and one overdue rule for all four surfaces (IDEA-2641, closes #1010) (#1244)
* feat(store): item reminders — the fire-at-an-instant primitive (IDEA-2641)

Adds the storage, the scheduler tick, and the canonical event for one-shot
item reminders (GitHub #1010). Nothing in Pad acted at a target time before
this: a due_date makes an item show up as overdue once somebody asks the
dashboard, so "revisit TASK-X on the 1st" had to live in an external cron.

A TABLE, NOT A SCHEMA-FIELD ANNOTATION. The design sketch proposed marking
schema date fields with a `reminds: true` key on models.FieldDef; recon
overturned it. Such a key does not survive an ordinary collection edit, two
independent ways: the web editor destructures each field into an EditableField
and rebuilds a fresh definition key-by-key on save, so unknown keys are
dropped (`pattern` and `unique_scope` survive only because two lines were
hand-added for them), and models.CollectionSchema has fixed fields with no
catch-all, so any Go unmarshal+marshal round-trip strips unknown properties —
the hazard retargetRelationFieldsTx mutates raw JSON to avoid. Both failures
are silent and both disarm a whole collection's reminders at once. It is the
same defect class that moved traits out of the schema column in TASK-2657.

The table also gives the lifecycle a home. A reminder is armed, then fired,
then acknowledged, and a re-arm returns it to armed — per-reminder state a
field definition has nowhere to keep.

remind_at is an RFC3339 UTC instant, deliberately not a `date` schema value:
those admit both YYYY-MM-DD and full RFC3339 and are compared against the
SERVER'S LOCAL calendar day. A fire-at time cannot carry that ambiguity. The
remaining timezone question for due_date is filed separately.

Firing is one transaction per reminder carrying BOTH the fired_at write and
the outbox insert. That pairing is the point: a fired_at committed without its
event is a reminder that silently notifies nobody and can never be retried,
because the row has left the armed set; an event without fired_at fires every
tick forever. The UPDATE's own `fired_at IS NULL` predicate is the arbiter, so
two instances ticking at once produce exactly one winner.

item.reminder_due is admitted to the closed events/1 set as v1.2, with a new
PayloadReminder family and no SSE name. The subject is the REMINDER, not the
item: two reminders can be armed on one item, so an item-subject event could
not say which fired, and the reminder id is what an acknowledgement addresses.
A new payload family rather than reusing the item snapshot for the same
reason — a snapshot would validate and still not answer the only question the
event exists to answer. No SSE name in v1 because the poll surface is the
contract; adding one later is additive, removing one is not.

Ack is explicit and nothing else acks. An item reaching a terminal status
deliberately does NOT ack: that would make every status write a reminder
mutation, and it would silently consume a reminder set to fire after the work
was done.

* feat(server): reminder surfaces, and one shared overdue rule for all four

Second half of IDEA-2641: the HTTP surface, the scheduler tick's wiring, and
the fix for the finding that justified the unit — `ready` / `next` did no date
handling at all.

OVERDUE NOW HAS ONE IMPLEMENTATION. It used to live inline in the dashboard's
attention loop, which meant `pad project stale` inherited it (it filters that
very list) and the recommendation surface never saw it. So a deadline reached
the two surfaces that REPORT on work and never the one an agent PULLS from.
overdue.go is now the only place that decides, and all four call it.

Two behaviour changes fall out, both deliberate:

  - An overdue item bypasses the orphan branch's high/critical priority gate.
    That gate was where a deadline quietly stopped: a low-priority item three
    weeks late was reported by `stale` and never suggested by `next`.

  - Overdue sorts above in-progress. The list is capped at three, so a rank
    below in-progress would not merely order the deadline lower — on any
    workspace with three things in flight it would keep an overdue item off
    the surface entirely, which is indistinguishable from not shipping this.

The server-local-today comparison is UNCHANGED and known to be wrong for
multi-timezone deployments; it is filed as its own item with the cloud case
stated. Changing what "overdue" means on every existing instance inside a
change about where the rule LIVES is the kind of behaviour change nobody
reviews.

Fired reminders reach `next` / `ready` two ways, from one filtered list:
PendingReminders is the addressable form (it carries the id an ack needs), and
a prepended suggestion is the rendered form. They are prepended AFTER the cap
rather than entered as ranking candidates — a reminder is not a task competing
on priority, and whether it appeared should not depend on how busy the
workspace is.

Terminal-item reminders are FILTERED from the surface, never acked. Acking on
terminal status would couple every status write to reminder state and would
consume a reminder armed to fire after the work was done. The row stays
exactly as the user left it; the distinction is observable, and asserted.

Three guard tests caught this change and each was answered rather than
silenced:

  - The request-body reader guard was right: the handlers now go through
    decodeJSON, inheriting the NUL refusal and the size cap.

  - The canonical-events guard was right: item.reminder_due is admitted to the
    duplicated contract table as SPEC-3 v1.7, with the reminder subject kind
    and the new payload family. SPEC-3's own text owes the same amendment.

  - The NUL census asked for a decision on eight new columns. None carries
    caller text: ids and FKs are server-generated, four are the server clock,
    and remind_at is now re-parsed and re-formatted in the STORE as well as at
    the edge — so the stored value is always machine-produced from a parsed
    time and no caller bytes reach the column. The doc comment that used to
    say "the caller normalizes" protected nothing.

    Regenerating the baseline also found that GEN_NUL_BASELINE=1, which the
    test's own instructions name, was never implemented — the flag did
    nothing, so the documented path was hand-editing the file. Implemented, so
    the next reader gets the mechanism the instructions promise.

* test(reminders): the lifecycle, the four surfaces, and 22 killed mutants

Every test here was designed against a specific mutation and the mutation was
RUN. A green suite proves nothing about a suite nobody tried to break, and
three of the mutants I first wrote were not experiments at all.

Store (10 mutants, all killed): candidate predicate <= flipped to >=; the
event emission lifted out of the fire transaction; the fire UPDATE's
`fired_at IS NULL` arbiter removed; the RowsAffected check ignored; re-arm
clearing fired_at but not acked_at; ack losing `fired_at IS NOT NULL`; the
poll surface losing `acked_at IS NULL`; normalizeRemindAt no longer refusing;
it dropping .UTC(); GetReminder losing its workspace scope.

Surfaces (12, all killed): the priority gate no longer bypassing on overdue;
the sort no longer ranking overdue first; attention leaving the shared helper;
the reason losing its OVERDUE prefix; the comparison flipped to >; terminal
items no longer skipped; terminal reminders no longer filtered; the filter
ACKING instead of hiding; reminders appended instead of prepended; the tick
running on a far-future clock; ack answering 200 for an unfired reminder;
parseRemindAt accepting a bare date.

THREE MUTANTS DID NOT COUNT ON THE FIRST PASS and were rewritten. Two failed
to compile (`if false` orphaned a variable; deleting a parse orphaned an
import) and one had an anchor matching two call sites. A non-compiling mutant
emits zero FAIL lines and reads exactly like a surviving one — it invents a
hole that is not there — so the harness reports BUILD-FAIL and ANCHOR-BAD as
outcomes distinct from SURVIVED. It also restores files from an in-memory copy
rather than `git checkout`, which would delete uncommitted work in the tree.

ONE MUTANT GENUINELY SURVIVED and the test was at fault, not the mutant:
appending rather than prepending reminder suggestions was undetectable because
the fixture had a single item, so the reminder sat at index 0 either way. The
fixture now fills the three-item cap with in-progress work, where an appended
reminder lands fourth and vanishes. Faithful mutant, weak test — checked in
that order.

The same lesson shapes the four-surface fixture: it is a LOW-priority open
orphan, because that is the case the old code handled worst. A high-priority
task would have made the ready/next leg pass against the unfixed tree, which
is a green that measures nothing.

Negative controls throughout: a future deadline is not overdue and does not
reach the gate bypass; a tick with nothing due fires nothing; a completed item
is neither overdue nor suggested. Without them a helper that reported every
date, or a tick that fired everything, would satisfy every positive leg.

The lead's pin is asserted in both directions: a fired reminder on a done item
is ABSENT from the surface and PRESENT and still unacknowledged in the table.
Asserting only the absence would pass against an implementation that consumed
the row, which is the behaviour the pin exists to forbid.

* feat(mcp): pad_item.remind + ack-reminder, ToolSurfaceVersion 0.28

An agent that can RECEIVE a reminder but not set one has half the primitive.
The poll surface is pad_project.next / ready, both long exposed, so reminders
already reached agents — what was missing is the other half: deferring a piece
of work is exactly the moment an agent knows when it wants to be asked again,
and it had no way to say so.

Two additive actions, two optional params. Nothing existing moved, so a v0.27
consumer enumerating neither is unaffected — the v0.13 / v0.11 / v0.8
disposition, which likewise wired existing CLI verbs onto the catalog.

remind_at REFUSES a bare date rather than reading it as midnight. Worth
stating because the `date` schema type accepts YYYY-MM-DD and a caller will
reasonably try it here: a bare date names a 24-hour span, and choosing an hour
inside it would fire at a time nobody picked.

Re-arm and disarm stay CLI-only. Both address a reminder by an id the agent
would have to list first, and no listing action exists on this surface — a
door with no handle. Adding them later is additive.

Five guards had to be taught, and each was answered on its merits rather than
excluded: the HTTP parity test (route mappers added, so the actions work on
the remote transport rather than being advertised and unrouted), the
read-only catalog's cmdhelp fixture and expected cmdPath map, the field-
conflict classifier (remind_at / reminder_id are NOT field writers — a
reminder is a row in its own table addressed by its own id, so listing them
as classified sources would have pointed detectFieldConflicts at something
that is not a field source), and the instructions.md / README action tables.

That machinery is why the version bump is safe to make now, and it earned its
keep on this change: every one of the five failed on the first build after the
catalog entry landed.

CONVE-23 sweep for prose this falsifies:

  - SPEC-3 (DOC-2653) amended to v1.7 in the room, recording item.reminder_due
    with its new subject kind and payload family — the first canonical event
    with no user mutation behind it, since a scheduler tick produces it.
  - CLAUDE.md gains the reminder routes, the CLI verbs, and the v0.28 entry.
    It was also stale at 0.26 with NO v0.27 entry at all: the 0.27 unit swept
    instructions.md and README.md and missed this file. Both added.
  - skills/pad/SKILL.md gains the verbs and a routing entry, including the two
    things an agent will get wrong — the time is an instant, so ask for a time
    of day rather than picking one, and finishing the item does not
    acknowledge the reminder.

* fix(reminders): codex round 1 — four findings, all real, all with a pin

Round 1 found four defects and refuted none of them. Each fix carries a test
that fails against the code as it was, and each of those was mutation-checked.

**P1 — pending reminders bypassed item-level visibility.** Every other
dashboard section reads `allItems`, which the store already scoped to the
caller's collections AND their granted item ids. The pending-reminder list is
a direct workspace-wide query and inherited none of that, so a guest holding a
grant on ONE item could read the refs and titles of every other item in the
collection through its reminders — an item-level leak wearing a
notification's clothes. Now filtered with the same `isItemVisibleToGuest` call
the sibling sections use. The test's two items share a COLLECTION on purpose:
a collection-level filter was already applied, so separate collections would
have made it pass against the unfixed code.

**P1 — soft-deleted items could starve the queue permanently.** Candidate
selection ignored `deleted_at`, and `fireOneReminder` rolls back when it finds
the item gone — which leaves the reminder ARMED and therefore a candidate
again on the next pass. Candidates are ordered oldest-first and bounded by a
limit, so enough archived reminders fill every batch and no live reminder ever
fires. Silent, too: the tick reports zero fired and looks idle. Excluded in
the candidate query rather than skipped downstream, so those rows never occupy
a slot; the reminders themselves are kept, so restoring an item restores its
reminder with it — asserted, because a fix that reaped them would pass the
starvation test alone.

**P2 — the pass stopped at the first failing reminder.** The per-reminder
transaction exists precisely so one unfireable row cannot hold back the rest,
and `return fired, err` made that comment false — with candidates
oldest-first, one persistently broken old reminder blocks every newer one
forever. Now continues and joins the errors, so a pass that fired seven and
failed three reports both halves rather than reading as clean. The loop is
split behind an injected seam because a real mid-transaction failure is not
reachable from outside: the database refuses the corrupt rows that would cause
one (verified — invalid JSON in items.fields is rejected by the schema).

**P2 — suggestions dropped the reminder id.** The docs tell an agent to
acknowledge what it sees in next/ready, and the payload carried no handle: a
stateless poller could read the reminder and had no way to retire it, so it
would be shown the same item forever. `DashboardSuggestion` now carries
`reminder_id` (omitempty), `pad project next` prints the exact ack command,
and the test acks with the id the surface handed out rather than merely
checking the field is populated — a wrong-but-present id satisfies equality
with itself.

Four mutants, four killed; one was rewritten first because its anchor matched
two call sites and was therefore not an experiment.

* fix(reminders): codex round 2 — four findings, all real

**`--rearm` was unusable.** `ExactArgs(1)` forced an item ref that the rearm
branch then ignored, so the flag could not be reached without supplying a ref
that was silently discarded. Now `MaximumNArgs(1)`, with each mode checked
explicitly: a ref is required to arm, and a ref supplied ALONGSIDE `--rearm`
is refused rather than ignored — it names an item the reminder may not even
belong to, and quietly dropping it is how a user learns nothing about the
reminder they just moved.

**`unremind --format json` emitted plain text**, breaking the parseable-output
contract every sibling command honours.

**The MCP `ref` param did not list `remind`.** Agents read that flat
description to decide what to send, so an action missing from it is an
invalid call waiting to happen. It now also says what `ack-reminder` takes
instead, and why: a reminder is addressed by its own id because an item can
carry several.

**Fractional seconds fired early.** `time.Parse` accepts `09:00:00.900Z` and
`Format(RFC3339)` drops the fraction, so it was stored as `09:00:00Z` and
fired 900ms BEFORE the moment the caller named — silently, having rewritten
their value on the way in. Seconds are genuinely the stored resolution (the
column is compared as a string against a whole-second clock, and the tick runs
every 30s), so the only question was which way to resolve it, and truncation
resolved it the wrong way. `NormalizeInstant` now rounds UP: at most a second
of lateness, in exchange for a guarantee that can be stated — a reminder never
fires before the instant it was set for. Late is a reminder; early is a wrong
answer. Whole seconds round-trip exactly, which is asserted, because an
implementation that added a second unconditionally would otherwise pass.

Three mutants for this round, three killed (round-up→truncate,
round-up→unconditional-add, MaximumNArgs→ExactArgs). Thirty across the unit.

Two fixes carry no dedicated test and it is worth being explicit rather than
implying coverage: the `--format json` branch on `unremind` is a one-line
output change with no server-free way to drive it, and the MCP `ref`
description is prose the drift tests do not read — they assert an action is
DOCUMENTED, not that a param's sentence lists it.

* docs(reminders): the ack id is on the surface an agent polls, not only on the arm response

CONVE-23 follow-through on the round-1 fix. Both agent-facing docs told a
caller to acknowledge a reminder with the id "returned when you armed it" —
true, and useless to the caller that matters: a poller reading next/ready
never armed anything. The suggestion now carries reminder_id and `pad project
next` prints the exact ack command, so the docs say that instead.

The prose was written before the fix existed, which is exactly the case
CONVE-23 is about: a change that makes an instruction stale without touching
the file the instruction lives in.

* test(reminders): bind the tick LOOP to the work, not just the pass (CONVE-19)

Every other test in this file calls runReminderTick directly. That vouches for
the component and says nothing about whether anything ever calls it — a tick
that is never started is indistinguishable, from those tests, from one that
is. It is the convention's exact case, and the failure I recorded on my own
identity doc three times in one unit: I test the component and not the
binding.

Driven through the injectable tick channel so the assertion pins a SPECIFIC
pass instead of racing a 30-second ticker, and polled to a bounded deadline so
a loop that never runs FAILS rather than hanging the suite.

Mutant: drop `s.runReminderTick()` from the select and this goes red while
every direct-call test stays green. Killed.

The idempotence leg exists because a second Start spawning a second loop would
leave one running after Stop, making the BUG-842 drain invariant false for
this sweeper specifically — the one property a copied lifecycle is most likely
to get right by accident and least likely to be checked.

The cmd/pad call site (cmd_server.go, alongside StartTokenReaper) stays
verified by inspection: a source-scanning guard for it would be an instrument
asserting facts about source, which is code with an adversary and not worth it
for one line that sits in the middle of five identical neighbours.

* fix(reminders): codex round 3 — a deferred reminder fired anyway, and the poll surface was unbounded

**A re-arm mid-pass did not stop the fire.** The candidate scan selects an id;
before the UPDATE runs, a `--rearm` can move that reminder into the future.
Re-arm clears `fired_at`, so a predicate checking only `fired_at IS NULL`
still matched — the pass fired a reminder the user had just deferred and
emitted its event. The re-arm cannot undo that: it can clear the mark, but the
event is already on the outbox and at-least-once means a consumer has seen it.

The fire UPDATE now revalidates `remind_at <= nowTS` against the SAME nowTS the
candidate scan used. Same-value deliberately: the arbiter and the scan must
agree about when this pass is, or a reminder could pass one and fail the other
for no reason but clock drift inside a single pass.

**The poll surface was unbounded.** Every fired-and-unacknowledged reminder was
loaded and turned into a suggestion prepended to a list that is otherwise
capped at three, so a workspace with five hundred unacknowledged reminders
returned five hundred suggestions — in the dashboard response, the hottest read
in the product, growing until somebody acknowledged them.

Two bounds, because they are two different guarantees: the query takes a window
(default 50, oldest-fired first, so it holds what has waited longest), and the
prepended suggestions are capped at 5 so `suggested_next` stays a
recommendation rather than a second inbox. The full set stays addressable in
`pending_reminders`.

Truncation is REPORTED as a boolean, not a count. A count would have to be
post-visibility-filter to be true for the caller reading it, and the store
cannot compute that — the filter runs per item, above. "There are more than you
can see here" is the strongest claim the data supports, so it is the one made.

Four mutants; two killed outright, two survived and were run down under
CONVE-28:

- **Uncapped suggestions survived because the fixture had ONE reminder** —
  capped and uncapped are the same list at n=1. That is the SECOND time a
  single-item fixture hid a count-or-order property in this file. Fixture now
  arms eight; it also asserts all eight remain in `pending_reminders`, so the
  cap is pinned to the recommendation and not to the data.

- **Removing the SQL LIMIT survived, correctly, and the test comment now says
  so.** The Go slice cap bounds the PAYLOAD; the SQL LIMIT bounds the
  DATABASE'S work. Only the first is observable at this level — with the LIMIT
  gone the response is still bounded, while the query silently goes back to
  materialising every pending row before discarding most of them. That is a
  memory and I/O property with no assertion available here, so it is stated as
  a coverage boundary rather than papered over with a green that would not have
  measured it.

* docs(reminders): the fire predicate arbitrates against two actors, not one

CONVE-23 inside the file the round-3 fix touched. The comment described the
UPDATE as an arbiter for concurrent TICKS, which is what it was written for
and is why I did not re-read it when asked whether a user edit could race the
pass. It now says what it actually defends against, and names the general
shape: an arbiter is only an arbiter with respect to the writers it can see.

* fix(reminders): codex round 4 — the round-3 bound recreated the round-1 starvation

Round 3 bounded the poll surface. Round 4 caught what that bound did: the
query took the first N rows and the dashboard then discarded the ones it could
not show — hidden items, unauthorised items, completed items — so N such rows
hide a visible reminder behind them indefinitely, with no continuation to
reach it.

That is the SAME defect I had removed from the fire path one round earlier,
reintroduced in the read path within the hour. The general form is worth
stating because I clearly did not hold it: **a bounded window is only safe
when the discarding happens BEFORE the bound.** Filtering above a limit is a
starvation every time, and it does not matter what the filter is for.

Two halves, because the two filters are not the same kind of thing:

**Visibility is now scoped IN SQL**, using the same collection-id / item-id
sets every other dashboard section gets through `allItems` — the same
three-way shape as ItemListParams, where holding both collection grants and
item grants is an OR. Invisible rows no longer occupy the window at all, which
is strictly better than filtering them out afterwards and is what the sibling
sections have always done.

**Terminality is paged**, because SQL cannot evaluate it — a collection's
schema defines which statuses are terminal. The collector refills from the
next page when a page comes back short, bounded by a max scan so a workspace
full of completed items cannot turn a dashboard read into a table scan. The
bound is 10x the window: the common shape fills on the first page, and the
pathological shape terminates in a fixed number of indexed reads. Stopping at
the scan bound reports truncation, which is honest — there may be more, and we
did not look.

The empty-scope case is a THIRD state that reads like the second: nil
CollectionIDs means unrestricted, a non-nil EMPTY slice means this caller sees
no collections. Without an explicit guard they collapse, because the switch
matches none of its cases at length zero and adds no clause at all — so
"nothing visible" would return the whole workspace.

Three mutants, one survived: the empty-scope guard, because no dashboard-level
test produces that state (callers that would are refused earlier by workspace
access). Faithful mutant, missing test — it now has a direct one, with a
sanity leg so a build returning nothing cannot pass it by accident. A guard for
a state nothing exercises is exactly the one that rots.

* fix(reminders): codex round 5 — the MCP action I shipped did not work over stdio

**P1: local stdio MCP `remind` was unusable.** cmdhelp derives positionals by
regex from a command's `Use` string, and `<instant>` inside
`remind <ref> --remind-at <instant>` matched — it became a second REQUIRED
positional, so dispatch failed with `missing required argument "instant"`. The
action was advertised on a transport where it could not run.

**The MCP catalog's own tests did not catch it, and the reason is the finding.**
That suite builds its cmdhelp document BY HAND: I wrote `Args: mkArgs("ref")`
in it, so the fixture agreed with what I meant rather than with what the CLI
says. Five parity and drift tests passed against a document I authored to
match my own intention — the "a test that agrees with whatever the table says
is not a test of the table" shape, which the canonical-events test warns about
in its own comment two packages away. The new test reads the REAL command tree
via cmdhelp.Build, which is the only thing in this repo that can disagree with
me about what the CLI declares.

**P2: `pad project ready` withheld the ack handle** that `next` prints.
Showing a fired reminder on the surface an agent polls while withholding the
id it needs to retire it means the same entry comes back on every poll,
forever.

**P2: suggestions asserted a collection they did not have.** The orphan branch
admits ANY collection — its own comment claimed it gated on tasks "mirroring
the active-plan branch", and that comment was simply false — while the output
hardcoded `Collection: "tasks"` and the reason said "Open task". Pre-existing
for high-priority items since BUG-1082; my overdue bypass widened it to any
overdue item, which is how it surfaced.

Fixed by carrying the item's REAL collection rather than by narrowing the
branch: narrowing would silently drop the non-task items this has surfaced for
a year, and the defect is the mislabelling, not the inclusion. The false
comment is replaced with what the code actually does.

The first version of that test used an overdue IDEA and SKIPPED — ideas use
`new`, and the branch requires `open` or an active status, so it never became
a candidate. A test that cannot fire is a failed reconstruction, not a pass;
the fixture is now a bug-like collection whose vocabulary contains `open`,
which is the population the defect can actually reach.

Three mutants, three killed. Forty-one across the unit.

* fix(reminders): codex round 6 — reminders fired from soft-deleted workspaces

**P1, and the only defect in this unit whose consequence leaves the process.**
Workspace soft-delete deliberately keeps items for the 30-day restore window,
so the candidate query's filter on the ITEM's deleted_at found nothing wrong —
and the tick kept firing, emitting outbound webhook events for a workspace
whose owner had deleted it, possibly while deleting their account.

Both queries now join workspaces and require `w.deleted_at IS NULL`. Nothing
is destroyed: a restored workspace resumes firing, which the test asserts,
because "stops firing" and "is destroyed" are very different answers to
someone who restores a workspace and only one of them is right.

That test first failed for the WRONG REASON and the fixture was at fault: it
counted every outbox row in the workspace, and item creation writes its own,
so the assertion was satisfiable by the fixture itself and discriminated
nothing. Scoped to the reminder event type.

**`Use: "remind <ref>"` declared a requirement the command contradicts.**
cmdhelp derives the machine-readable arg spec from that string, and `--rearm`
takes no ref — so the published contract said "required" for something
optional. The requirement is CONDITIONAL, which cmdhelp cannot express, so the
honest declaration is `[ref]` plus the explicit check that names both call
shapes. The round-5 test grew a `required` column, which is what makes this
observable at all: asserting only the arg NAMES would have passed.

**The pad_item tool description omitted both new actions.** The params were
declared and the actions dispatched, but the prose an agent reads to decide
what a tool can do did not mention them — discoverable only by someone who
already knew to look. It now describes both, including the two things an agent
gets wrong: remind_at is an instant, and nothing but an explicit ack retires a
fired reminder.

Three mutants, three killed. Forty-four across the unit.

* fix(reminders): codex round 7 — one predicate for the scan and the arbiter

Third instance of one class, so this fixes the SHAPE rather than the instance.

The class: the candidate scan filters on something the fire transaction does
not revalidate, so a change committed between them fires a reminder that no
longer qualifies. Round 3 was a re-armed instant. Round 1's soft-deleted item
was the same thing caught from the other side. Round 7 is a workspace deleted
between the scan and the fire — the round-6 fix added the condition to the
SCAN only, and the arbiter went on not knowing about it.

Fixing those one at a time is what let the third happen. `reminderFireable` is
now a single string that both sites reference: the scan asks it and the fire
UPDATE re-asks it, so they cannot disagree, and a fourth condition is one edit
in one place rather than two edits someone has to remember are paired.

Written as a correlated EXISTS on item_reminders.item_id rather than a JOIN
precisely so the identical text is valid in both a SELECT and an UPDATE, and
the scan drops its table alias so the two uses are the same characters.

What deliberately stays outside it: `fired_at IS NULL` and `remind_at <= ?`
live on the reminder row itself, are already spelled identically at both
sites, and folding them in would need a parameter order the shared form cannot
express. Said in the comment so the omission reads as a decision.

Both directions are now tested at the arbiter — a workspace deleted mid-pass
and an item deleted mid-pass — because the item case previously relied on the
item load coming back nil, and someone simplifying the EXISTS down to the
workspace check alone would otherwise still see green.

Three mutants, three killed: the arbiter dropping the shared predicate, and
the predicate dropping each of its two halves. Forty-seven across the unit.

* fix(reminders): codex round 8 — workspace export silently dropped every reminder

WorkspaceExport is a hand-maintained field list, so a new table joins it only
if someone remembers. Reminders did not: a backup/restore, or a
SQLite→Postgres migration via `pad db migrate-to-pg`, dropped every pending
reminder with nothing in the destination to show anything had gone.

The line that list has always drawn is item-scoped workspace CONTENT
(comments, links, versions — exported) versus per-user state (stars, watches —
not). A reminder has no user column and hangs off an item, which puts it on
the exported side. Stating the rule rather than just adding the field, because
the next person adding a table needs to know which side they are on.

LIFECYCLE MARKS ARE CARRIED, not reset. A fired-and-unacknowledged reminder is
still owed to whoever armed it, so it arrives pending; an armed one whose
instant has passed fires once on the destination's first tick, which is what
would have happened had the workspace never moved. Re-arming everything on
import would invent a schedule the user did not set. NULL rather than empty
string for the unset marks — the lifecycle is defined by NULL-ness, and ""
would make a never-fired reminder read as fired at "".

TestMigratedTablesCoversTheExport caught the second half, which I would have
missed: `pad db migrate-to-pg`'s NUL preflight decides what to REFUSE on from
MigratedTables, so a table the migration copies and the preflight does not
know about is a gap in exactly the guard that exists to prevent one. Added
there too, with the reason it can never actually fire — every column is
machine-produced, so it is listed for coverage rather than expectation — and
the "six tables" prose it falsified is now seven.

Two mutants, two killed: export dropping the block, and import discarding the
marks. Forty-nine across the unit.

* test(reminders): state the fire-path invariant and pin it from the invariant

The lead's read on why rounds 4 and 7 were the same class: the fire path had
no stated invariant, so each fix defended an instance. This states it, and
derives the pin from the paragraph rather than from the bug history.

THE INVARIANT: the candidate scan is a hint and may be assumed to prove
nothing. Every condition that made a row a candidate is re-asserted inside the
transaction that marks it fired, in the same statement that does the marking,
so checking and writing are one atomic act.

Worded as "the scan proves nothing" rather than as a list on purpose — a list
invites the next person to add a condition to the scan and stop, which is
exactly what happened four times here.

TestFirePathInvariant is the pin: one table, one row per scan-side condition,
each invalidating that condition in the window between the scan and the fire
and asserting the same three things — nothing fires, no event leaves, the
reminder is not consumed. The earlier per-defect tests are folded in as rows;
they said the same thing one instance at a time, which is how four of these
shipped. Adding a fifth condition to the scan without a row here should feel
like an omission. It carries a positive control, because four cases that all
assert nothing happens would pass against a build that never fires at all.

The matrix immediately falsified a claim in the paragraph I had just written.
I wrote that the item load inside the transaction is "for the payload, not for
the check"; removing the item half of reminderFireable alone changes no
observable behaviour, because the load then returns nil and the deferred
rollback undoes the write. Item liveness is defended TWICE and a single-mutant
experiment cannot say which guard is carrying it — removing both is what kills
the test. Both are kept, the predicate is named as primary (the row never
matches, so no write happens at all), and the asymmetry is stated: workspace
liveness has no second line, which is why dropping ITS half does fail the pin.

Six mutants: five singles plus the pair. Five killed alone; the item single
survives by design and is documented as such rather than left as an unexplained
green. Fifty-five across the unit.

* fix(reminders): codex round 9 — one legacy row could hide every reminder

**P1: items.item_number is NULLABLE and I scanned it into an int.** Migration
006 added the column to existing rows, so a pre-numbering item still carries
NULL — and scanning NULL into an int fails the Scan, which fails the QUERY,
which degrades the whole pending-reminder section. One old row, and the
feature is dark for everyone in that workspace.

ListWatchesForUser, which this query was modelled on, uses sql.NullInt64 for
exactly this column. I copied its shape and dropped the part that handles the
column's actual nullability — the same way of being wrong as the round-5
cmdhelp fixture: borrowing a form without borrowing what it knows. The legacy
row now carries no ref rather than a fabricated "PREFIX-0", which would name a
different item.

**P1: export shipped reminders that import could only discard.** The items
section filters on deleted_at IS NULL, so a soft-deleted item is not in the
bundle and its reminder can never be reunited with it. My comment claimed the
item_links rationale — round-trip the raw graph so a restore reunites them —
which is true for links and false here, because links keep soft-deleted
endpoints in the bundle and items do not. A link is a row ABOUT two items; a
reminder whose item is absent is a dangling schedule.

**P2: import wrote remind_at raw.** Import is a writer, and a bundle is not
necessarily one this server produced — hand-edited, or from another instance.
A local offset or a bare date would land in the one column every comparison
downstream treats as a UTC instant, firing early, late, or never. It now
normalizes like every other door. An unparseable value is SKIPPED with a
warning rather than failing the restore, matching the lenient import-side
precedent already in this file, and the raw value's LENGTH is logged rather
than its content.

Three mutants, three killed; two needed rewriting because the single-line form
did not compile — reverting the nullable scan also requires reverting the
render, and dropping the normalization orphans a variable.

PROCESS FAULT, recorded because it makes this round's findings weaker than
they look: I edited the tree while this review was reading it — committed the
invariant work and ran five mutation experiments, which write and restore
source, over the same files. A review binds to the tree it read and I moved it
underneath. Every finding above was re-verified against the current tree
before being acted on, and the next round runs with no concurrent edits.

* fix(reminders): codex round 10 — one orphaned item aborted a whole restore

An ORPHANED item — one whose collection is missing from the bundle — still
gets an itemMap entry. It has to: the entry is written before the skip because
parent resolution inside the same loop reads the map for items it has not
reached yet. So `itemMap[x] != ""` is satisfied by an id that names no row,
and inserting a foreign key to it fails (SQLite enforces FKs here via the
DSN's `_pragma=foreign_keys(on)`; Postgres always does).

The pre-existing mapping is the sharp edge. The aggravating half was mine:
this loop treated a failed reminder insert as FATAL, where item_links and
item_versions both skip, so one orphaned item carrying a reminder rolled back
an entire 900-item workspace restore. A reminder is the least critical thing
in a bundle and it had the strictest failure handling in the file.

Both halves fixed: the loop gates on items that actually landed, and a failed
insert warns and skips like its siblings.

TWO GUARDS THAT ONLY DIE TOGETHER, and this is measured rather than assumed.
Reverting either alone leaves the test green — with the map gate restored the
skip survives the FK failure, and with the fatal return restored the gate
means the insert never fails. Removing both is what fails it. They are kept as
a pair because they defend the same failure at different depths (prevent the
bad write / survive a bad write arriving some other way), and the pair is
recorded in the code so a future reader does not delete one as dead after
watching its mutant survive. Second time this shape appeared today; the first
was item liveness on the fire path.

The bundle in the test is hand-built, because ExportWorkspace cannot produce
an orphan — which is the reason it needed a test. That shape only arrives from
a hand-edited or foreign bundle, and surviving those is what import is for.

Three mutants: two singles that survive by design, plus the pair that kills.
Sixty-one across the unit.

* fix(reminders): codex round 11 — four contract slips, one of them another unit's

**suggested_next returned up to eight entries against a cap of three.** Round 3
prepended reminders PAST the list's own cap, reasoning they should not compete
for slots. Every consumer — the web dashboard, `pad project next`, `pad project
ready` — is written for three.

Worse, it silently falsified a decision recorded elsewhere: BootstrapDashboard
deliberately has no suggested_next_overflow_count BECAUSE this list is capped
at three upstream, and its comment names raising that cap as the moment to add
one. My change made another unit's reasoning wrong in a file I never opened.
The combined list is now trimmed back to three, reminders still leading — a
reminder can push a task suggestion out, which is the right way round, and the
full set stays addressable in pending_reminders.

My first version of that trim used `limit`, which is REASSIGNED above to
len(candidates) — so on a workspace whose only entries are reminders it would
have truncated to zero, killing precisely the case the surface exists for.
Caught by reading the surrounding lines before running anything; it has its own
test now.

**pending_reminders was uncapped in the bootstrap projection.**
BootstrapDashboard embeds *DashboardResponse, so every new field joins the boot
payload automatically — here, a window of up to 50, which is the budget
PLAN-1410 spent a unit trimming. Capped at 5 with an overflow count, under its
own constant rather than borrowing bootstrapAttentionCap: they answer different
questions and a future change to one must not silently move the other.

**Truncation was reported from the wrong question.** The collector used the
store's `more` flag, which answers "is there another PAGE", not "did I read all
of THIS one" — so a window filling part way through the final page reported
that the caller had seen everything while unread rows sat behind the fill
point. The paging bounds are now injectable so the case is testable at all:
building it with a window of 50 needs ~75 rows in a specific pattern, with a
window of 3 it is four.

**Import accepted acked-without-fired**, which is not one of the lifecycle's
three states. Such a row fires, is excluded from the pending surface because it
is already acked, and can never be acknowledged because AckReminder requires
acked_at IS NULL — an event emitted into permanent invisibility. The
acknowledgement is dropped and the schedule kept, since an ack of something
that never fired means nothing.

Five mutants, five killed (one rewritten — removing the flag orphans a
variable). Sixty-six across the unit.

* fix(reminders): codex round 12 — a read is not a hold; scope the arm; ack from the ack

Four P2s from round 12 (two independent runs, both landing on the same
line of the fire path), each closed at the layer where it lives:

- fireOneReminder pins the item and workspace rows FOR NO KEY UPDATE on
  Postgres before the arbiter UPDATE. reminderFireable re-asserted
  liveness at the predicate's instant and nothing held it to the commit
  instant; under READ COMMITTED an archival could commit in between and
  the event left the process about a deleted resource. Same idiom and
  same lock strength as CreateAttachmentForLiveItem; SQLite is excluded
  by its BEGIN IMMEDIATE, not skipped for convenience. Two PG-only pins
  verify "blocked" in pg_stat_activity, not by elapsed time; the
  pin-removed mutant fails both.
- CreateReminder asserts "live item of THIS workspace" in the INSERT's
  own SELECT and returns ErrReminderItemGone otherwise. The table had an
  FK and no same-workspace constraint; a mismatched pair fed another
  workspace's title to this one's dashboard and webhooks. Handler maps
  it to 404.
- AckReminder matches every fired row (COALESCE keeps the first ack,
  updated_at moves only when acked_at does), so a no-match means exactly
  "not fired at the instant of the ack". The handler no longer decides
  409-vs-200 from the row it read before the UPDATE.
- The invariant paragraph gains its missing sentence: "at that instant"
  means the commit instant, and the pin is what makes the predicate's
  instant and the commit instant the same one.

Round-12 caveat carried: both runs were static reads (sandbox blocked
Go's build cache), so "four" is a floor, not a measurement.

Refs IDEA-2641

* fix(reminders): codex round 13 — a reminder's workspace must agree with its item's, at every read

Every reader scoped by r.workspace_id and then joined the item without
asserting the two agree. No door writes a disagreeing row today
(CreateReminder derives the pair from the item; import maps within the
workspace), and the table has nothing that forbids one — so a hand-edited
bundle, a future move door, or a direct write would carry one
workspace's item into another's dashboard, export, and webhooks.

The identity goes into reminderFireable (scan + arbiter), the Postgres
row pin, ListPendingReminders and the export query. One test writes the
row raw — the only way one can exist — and asserts it is inert at each
site; the predicate-removed mutant scans and fires it.

Refs IDEA-2641

* fix(reminders): codex round 14 — the by-id and by-item reads assert the same identity as every other read

GetReminder scoped by the row's own workspace_id and ListRemindersForItem
by item_id alone, so a row whose two columns disagree — the class rounds
12 and 13 closed at the scan, the arbiter, the pin, the pending surface
and the export — was still readable through the two reads that reach a
single row. reminderOwned is that identity on its own, without the
liveness half those two reads must not have (a fired reminder on an
archived item is history worth showing). The write paths reach a row
only through GetReminder, so scoping it scopes them; a row no door can
write needs no door to delete it. ListRemindersForItem now takes the
workspace its caller already resolved the item in.

The raw-row test asserts both reads refuse the row from both sides; the
reminderOwned-removed mutant surfaces it through GetReminder.

Refs IDEA-2641

* fix(reminders): codex round 16 — an archived item's reminders are readable, and its verbs say "archived"

The doors resolved the item live. Listing an archived item's reminders
answered 409 from a GET, and ack/re-arm/delete answered a bare 404 for a
reminder that exists on an item that exists — while the store, since
round 14, deliberately keeps that history readable. The API already has a
posture for archived items: GET reads them, mutations answer 409
"archived … restore it before editing" (writeItemResolveError). The list
now follows handleGetItem; the lifecycle verbs load the item
include-deleted, run the visibility check first, and then answer the same
409 every other item mutation does. One test walks archive → list 200 /
ack 409 / arm 409 → restore → ack 200 on the same rows.

Refs IDEA-2641

* fix(reminders): codex round 17 — one suggestion per item, the archived 409 by slug, and the door courtesy named

Three findings on the server pass. (1) An item that was both a fired
reminder and an ordinary candidate appeared in suggested_next twice; the
ordinary entry is dropped, the reminder entry (which carries the ack id)
stays, and two reminders on one item remain two entries. (2) Round 16's
409 for an archived item's reminder was written by re-resolving item.Ref,
which is derived and empty for a legacy item with no item_number — so the
class most likely to be legacy fell through to a bare 404. The slug is
handed over instead. (3) The archived check in resolveReminderForWrite is
check-then-write, and an archive landing in between lets the verb through:
accepted and documented — it is the posture of every item mutation here
(UpdateItem's UPDATE has no liveness clause), the outcome is benign, and
putting liveness in AckReminder's WHERE would re-create the no-match
ambiguity round 12 removed.

Refs IDEA-2641
2026-09-04 11:36:11 -04:00
xarmian 63da2f4f5f feat(store,server,cli): count and repair the legacy NUL population (BUG-2810)
Layers A and B stop the value being written. Neither makes a row that
already carries one go away, and BUG-2810's filing is what that costs: an
affected workspace exports with a 200 and re-imports with a 400, so a
self-hoster restoring their own backup is blocked with no path forward in
the product, and `pad db migrate-to-pg` fails partway through the copy
against PostgreSQL's jsonb parser rather than up front.

This is DOC-2823's S3, on Dave's day-54 rulings: U+FFFD as the replacement,
repair standalone only with a migrate-to-pg preflight that refuses and
prints the command, `--repair-nul` on import shipping default-strict.

ONE REPAIR, beside the one predicate. textguard.Repair lives next to
ParameterRefused because four layers that agree about what is REFUSED and
disagree about what a repair PRODUCES is this bug family arriving one step
later. Its contract is a property over the same corpus, in both directions:
every refused value becomes one all four layers accept, and every accepted
value comes back IDENTICAL. The second half is the load-bearing one — a
repair that tidies values nobody complained about rewrites
`{"a":"x\\u0000y"}`, six literal characters after a doubled backslash, and
corrupts it.

The JSON arm is a string-literal SCANNER, not decode-walk-remarshal, which
is what the recon write-up proposed before it was written. Re-marshalling
changes four things nobody asked to change — object key order, insignificant
whitespace, integers wider than float64, HTML-ish characters — and silently
drops one of a document's LITERAL duplicate keys, which is a gap BUG-2812
owns and the last thing a repair should do. Scanning copies every byte it
does not deliberately rewrite, so an untouched document is byte-identical
without that having to be argued. A substring replace is not equivalent and
the test that proves it took a mutation to find: a doubled-backslash literal
ALONE never reaches the scanner, so the discriminating fixture is one
document carrying a live escape AND a literal.

THE COUNT IS COMPUTED IN GO. Measured on the read path in this worktree: a
row planted with `bad<NUL>name` reads back into a Go string with all 8 bytes
and the NUL intact, while `length(name)` in the same database answers 3.
TASK-2824 found that C-truncation and concluded no DB-side REPAIR could be
trusted; the same measurement on the read path says no DB-side COUNT can be
either. SQL narrows — `instr(col, char(0))`, plus the escape prefix on
JSON-classed columns, which is textguard's own pre-filter — and never
decides. The decision stays ParameterRefused with isJSON from the shared
86-column list, i.e. Layer B's classing.

Row addressing is read from the live schema rather than a hand-kept map:
39 tables carry protected columns, one (item_wiki_links) declares no primary
key and is addressed by rowid, two have composite keys, and five have a
single key that is not `id`. The repair checks RowsAffected because an
address that stopped selecting its row would otherwise commit an UPDATE that
touched nothing and report it as repaired — the one failure an operator
cannot see in the output.

`email_optouts(email)` is both a protected column and its own primary key.
Repairing it changes the row's identity and can collide with an existing
row, which in that table means somebody starts receiving mail again. It is
reported and skipped, with the reason.

The import flag is NOT an exemption from the gate. `--repair-nul` buys the
body one repair attempt and then runs the same `bodyDecodesNUL` on the
repaired bytes, which still decides — a decode path that skipped the check
is the door BUG-2803 spent thirty rounds closing, on the endpoint carrying
the largest attacker-controlled body in the product. Only the ESCAPE form is
repaired: a raw NUL byte makes the document invalid JSON, and widening what
parses is not this flag's job. Both doors are covered, JSON and tar.gz,
because giving them different answers is how one of them keeps being
forgotten.

Postgres is settled with evidence rather than sent up as a ruling: it cannot
hold either defect (22021, 22P05) and the four-way differential test already
pins that, so the scan reports not-applicable WITH the reason rather than
returning a zero a reader could mistake for a clean database.

Spellings settled here, per the dispatch: `pad db scan-nul` and
`pad db repair-nul` as siblings rather than `repair --nul`, matching
`migrate-to-pg`'s hyphenated compound — a repair verb that errors when given
no flag is a worse shape, and there is no second repair to share it with.
scan-nul IS the dry run, so repair-nul grows no --dry-run. It refuses while
the server is running unless --force, on the `pad db restore` precedent: the
report is a claim about a database, and one somebody else is concurrently
writing makes it a claim about a moment that has passed.

docs/backup.md's section on this is rewritten. It still said the rule lives
in the binary and not the database, which S2 made false, and it pointed at
this item for a preflight and a repair that now exist. Its import examples
also showed `pad workspace import < file`, which has never worked — the file
is an argument.

Closes BUG-2810.
2026-09-02 14:53:31 +00:00
xarmian ba1255881d fix(server): refuse a decoded NUL in a JSON request body (BUG-2803) (#1220)
* fix(server): refuse a decoded NUL in a JSON request body (BUG-2803)

The body half of BUG-2782 (path) and BUG-2784 (query). A caller-supplied
string reached a Postgres text parameter, Postgres refused it, and the
handler answered 500 — the honest answer is 400.

WHY THE TRANSPORT RULE CANNOT BE EXTENDED, which is the whole reason this
is a different fix rather than a wider middleware. ValidateQuery works
because a decoded query value is a substring of the raw query with ASCII
substitutions: the bad byte in the raw text IS the bad byte in the value.
That property fails for a JSON body — the reachable NUL arrives as the
six-character escape, all ordinary ASCII — so no request middleware can
find it without decoding the body, which is the handler's job.

MECHANISM, each premise measured against encoding/json rather than
reasoned about:

  raw NUL inside a string  -> decode ERR (invalid character in string literal)
  raw NUL after the value  -> decode ERR
  the escape in a value    -> decodes to a string CONTAINING a NUL
  the escape in a KEY      -> same
  a DOUBLED backslash      -> decodes to literal text, NO NUL
  the uppercase spelling   -> not a JSON escape at all

So the escape is the only vector and its substring is a sound FAST PATH
(absent -> no NUL possible), but not a sufficient test: a doubled
backslash carries the same six characters and decodes to text. In this
product that is not hypothetical — items and documents store markdown,
and a document about JSON escapes is an ordinary thing to write. The
exact step is json.Decoder.Token(), which returns DECODED strings, covers
object keys and arbitrary nesting (an item's fields blob), and needs no
knowledge of the destination type.

NOT REFLECTION over the decoded value, the other obvious design: it sees
[]byte fields AFTER base64 decoding, so a body carrying legitimate binary
({"b":"AQAC"} -> bytes 01 00 02) would be refused for a NUL that is not
text. A token walk sees the base64 characters. No request struct has such
a field today (searched: []byte with a json tag in internal/server and
internal/models, non-test — only models.YjsUpdate.UpdateData, which no
handler decodes from a body); the token walk is chosen so adding one
later cannot silently start rejecting valid requests.

BUFFERING IS NOT A COST. json.Decoder.Decode already holds the whole
top-level value in memory — refill accumulates into dec.buf and grows it
by doubling (encoding/json/stream.go) — so streaming never avoided the
copy. Measured on the 64 MiB workspace-import shape, total allocation:
stream+Decode 354.7 MiB, ReadAll+Unmarshal 256.5 MiB, ReadAll+Decode
512.5 MiB. Peak heap is order-dependent and does not discriminate; the
first run of that measurement showed a 0.77x peak win that vanished when
the legs were swapped, so only the allocation figure is claimed.

POPULATION, measured on Postgres 17 through the real router with a
control leg on every endpoint (92 mutating routes enumerated via
chi.Walk; 13 probed):

  before: 12 of 13 DOOR (control 201 / NUL 500, SQLSTATE 22021)
  after:  0 of 13 — every NUL leg 400, every control leg unchanged

Confirmed doors: workspace name, collection name, item title, item
content, item fields value, item title via PATCH, comment body, agent
role name, view name, document title, webhook secret, workspace import.
workspace-token name is UNMEASURED, not clean — its control leg 500s on
an unrelated FK in this fixture. The other 79 routes are unprobed, not
claimed clean; the completeness argument is structural instead, and
enforced by a test rather than asserted.

SECOND DEFECT, named rather than slipped in: the six handlers that
decoded straight off r.Body had no http.MaxBytesReader either — the cap
decodeJSON has always applied — so each was an unbounded body read.
Routing them through decodeJSON closes that too.

COMPATIBILITY: json.Unmarshal refuses trailing non-whitespace after the
JSON value where Decode ignored it. Deliberate, same direction as this
fix, and the only behaviour change beyond the refusal. Trailing
whitespace still passes. An EMPTY body still returns a wrapped io.EOF,
because handlers_playbooks.go reads errors.Is(err, io.EOF) as "no
arguments supplied" — caught by TestPlaybookRunAcceptsEmptyBody, which is
exactly the wiring a helper-level change is blind to.

No call site changed for the refusal itself: all 65 decodeJSON callers
already turn a decode error into a 400 carrying err.Error().

Release note: a NUL character in a JSON request body now returns 400
instead of 500 on Postgres deployments.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): follow the NUL refusal into JSON-encoded string fields (BUG-2803)

Codex round 1 on #1220: the check scanned ONE JSON layer, and several
fields cross the wire as JSON-ENCODED STRINGS rather than nested objects
— an item's fields, a collection's schema, a workspace's settings. The
OUTER decode of {"fields":"{...}"} yields the inner document as literal
text, in which the escape is still six ordinary characters and no NUL
exists, so the single-layer token walk passed it.

MEASURED on Postgres 17 with a control leg on each, after the
single-layer check was already in place:

  item.fields  as a JSON-encoded string   500   control 201
  collection.schema  as a string          500   control 201
  workspace.settings as a string          500   control 201

The error is DIFFERENT from the rest of this family, which is why it is
worth reading rather than assuming:

  insert collection: ERROR: unsupported Unicode escape sequence (SQLSTATE 22P05)

22P05, not the 22021 the path and query halves produce. The outer string
is pure ASCII so it never trips the text-encoding check; this is
Postgres's own JSON parser refusing the escape inside a document bound
for jsonb, which cannot represent a NUL. After this change all three
answer 400 with their control legs unchanged.

THE FIX: when a decoded string is itself a complete JSON object or array
— the class this API re-parses downstream — walk it too, to a depth
bound of 8. Recursion terminates on its own (each level is a strict
substring of the one above); the bound keeps a hostile body from buying
many full re-parses, and AT the bound the body is refused rather than
passed uninspected, since the escape is known to be present and the walk
has stopped looking.

WHAT THIS OVER-REFUSES, by design and pinned by a test: the rule is
structural, not destination-typed, so a plain TEXT field whose ENTIRE
value is a valid JSON document carrying the escape is refused too, even
though its column would have stored it. Prose ABOUT a JSON escape does
not parse as a bare document, so the case is narrow, and a value of that
shape breaks any consumer that parses it. The destination-typed
alternative — an allow-list of the fields that arrive JSON-encoded — is
exactly correct and goes stale in silence, which is the failure mode
ValidateQuery's comment rejects when it explains why per-site query
validators could not be written.

Tests: nested documents (fields/schema/settings/array/twice-encoded),
with controls for ordinary content, a doubled backslash INSIDE the
nested document, a string that starts like JSON but does not parse, and
prose that merely mentions the escape; the over-refusal pinned as a
decision rather than left as an accident; the depth bound; and a wiring
leg through the real router on SQLite, where the write would otherwise
SUCCEED so a green cannot be the database doing the work. Fixtures build
their JSON-encoded strings with encoding/json rather than hand-written
backslashes, since the escaping rules are the subject under test.

All four new tests fail with the recursion removed.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* test(server): build the NUL-bearing timeline fixture through the store (BUG-2803)

TestTimeline_NeverEmitsACursorItWouldRefuse built its fixture through the
API on a premise its own comment stated: "a structured id comes from the
item's fields blob, which nothing validates on write". BUG-2803 made that
false — decodeJSON now refuses a body whose strings decode to a NUL,
including one nested inside a JSON-encoded `fields` string — so the API
can no longer produce the row and the test 400'd on its fixture.

Repaired rather than deleted, because the DEFENCE it covers is still
live: rows in this shape can predate the rule, and the store has no such
check of its own, so a migration, an import or any future non-HTTP writer
can still produce one. The timeline must keep refusing to hand out a
cursor it would then reject.

The fixture now writes the blob directly, injecting the six-character
JSON escape rather than a raw NUL — the blob is JSON text and both
backends reject a raw NUL in it; the NUL comes into existence when Go
DECODES the blob, which is exactly how the timeline ends up with one
inside an entry id. The test is not vacuous under the change: it asserts
the NUL-bearing id took the positional fallback, so an injection that
failed to produce a NUL fails the test rather than passing quietly.

This is the CONVE-23 case — a change that falsifies existing prose owes a
sweep for that prose. The stale sentence was found by the test failing,
not by the sweep, which is the weaker of the two ways to find it.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* docs(server): correct the timeline comment BUG-2803 falsified (CONVE-23)

The entryID fallback's comment said note and decision ids "come from the
item's fields blob and nothing validates them on write". BUG-2803 made
that half false: the HTTP API now refuses a request body whose strings
decode to a NUL, including one nested inside a JSON-encoded `fields`
string. The sentence was true when written and nothing in this branch's
diff pointed at it.

The fallback still has to exist, and the corrected comment says why:
the STORE has no such check, so rows predating the rule — and anything
writing a blob by another path, a migration, an import, a future
non-HTTP writer — can still carry one.

SWEPT AND DELIBERATELY LEFT: two nearby comments
(handlers_timeline_id_collision_test.go, handlers_timeline_structured_test.go)
also say "nothing validates them on write". Both are about id FORMAT and
DUPLICATION — an imported artifact carrying a UUID-shaped id, a
hand-written blob repeating one — and this change validates neither. In
context those sentences remain true, so they are left alone rather than
edited into noise.

Sweep command: grep -rniE "nothing validates|not validated on write|no
validation on write|unvalidated" --include=*.go internal/ cmd/ — six
further hits, all about other subjects (github_pr raw writes, terminal
schema keys, push payload format, decodeJSON's size bound).

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): scope the nested-NUL walk to JSON-encoded fields (BUG-2803)

Codex round 2 on #1220. The nesting check from the previous commit
recursed into ANY string that parsed as a JSON document, on the argument
that a structural test beats a destination-typed one. That argument was
wrong in a way I had written down as an accepted trade and should have
weighed as a defect: a plain-text `content` value holding a JSON snippet
that merely MENTIONS the escape was accepted before this branch, is
stored in a text column that has no problem with it, and was newly
refused — including on RE-IMPORT of an export carrying it.

Refusing input the server itself produced is a worse failure than the
door the unscoped recursion was closing. Measured before the fix: a
workspace whose item content held such a snippet exported 200 and
re-imported 400.

The walk now descends only under keys whose STRING value is a JSON
document something downstream re-parses: config, events, fields,
metadata, phase_data, plan_overrides, schema, settings, tags, traits.

WHY A LIST IS SAFE HERE, when ValidateQuery's comment rejects exactly
this shape for query parameters: there the set of names is unbounded by
design (parseItemListParams turns any unrecognised parameter into a field
filter), so no list could be complete. Here the set is a closed property
of the wire model — a field is JSON-encoded because a Go struct declares
it as a string holding JSON — and
TestJSONEncodedFieldKeysCoversTheModels derives it from internal/models
and fails when a new one appears. The list cannot go stale in silence.

Over-inclusion is the safe direction and the list takes it: a listed key
that is not really JSON-encoded costs one parse attempt and can only
refuse a complete JSON document carrying the escape, while a missing key
reopens a door. `traits` is listed for that reason — it carries JSON but
its declaration has no comment saying so, which is exactly how the
derivation test would have missed it, so the test asserts coverage in one
direction only and the list is allowed to be a superset.

The walk also changed shape: decoding into `any` and walking the value,
rather than a token stream, because key context is needed to know which
subtree is JSON-encoded. The []byte reasoning is unchanged and still
holds — decoding into `any` never produces a []byte, so a base64 field is
seen as its ASCII text rather than as decoded bytes that might contain a
legitimate 0x00.

Tests: text fields carrying a JSON document are ACCEPTED (five keys),
with a leg proving the same document under a JSON-encoded key is still
refused, so the pair differs only in the key; the derivation test; and
the depth-bound fixture now nests under a JSON-encoded key at every
level, since nesting under an ordinary key would never start the
recursion and would have passed for the wrong reason.

STILL OPEN, and the lead holds it: a LEGACY row whose stored fields blob
already carries the escape still exports 200 and re-imports 400. That is
data this fix cannot make importable without weakening the write-side
refusal, and the disposition (repair sweep, flagged import, or documented
acceptance) is a product ruling. Recorded on the item.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): close the three body doors codex round 3 found (BUG-2803)

All three verified before fixing, none taken on the reviewer's word.

1. BUNDLE IMPORT BYPASSED THE REFUSAL (P1). handlers_import_bundle.go
parses pad-export.json itself rather than through decodeJSON, so the
SAME workspace import — reached with Content-Type application/gzip
instead of application/json — walked straight past the NUL check into
Postgres. The bundle's export blob is now checked with bodyDecodesNUL
before ImportWorkspace, answering the same 400. Test drives a real
tar.gz through the router with a clean-bundle control leg, because this
path answers 400 for a dozen unrelated reasons (bad gzip, out-of-order
tar, duplicate entries) and a bare 400 would prove nothing.

2. ONE CALLER SWALLOWED THE NEW ERROR (P2). handlers_admin.go's
test-email endpoint read `if err := decodeJSON(...); err != nil ||
input.To == ""` and fell back to the admin's own address, so a body
carrying a NUL answered 200. An ABSENT body legitimately means "send it
to me"; a body that is present and REFUSED is a different thing, and
collapsing the two turns a validation error into a success. The two
cases are now separated on errors.Is(err, io.EOF).

3. THE COMPLETENESS TEST COULD NOT SEE PAST TWO CALL SHAPES (P2). It
scanned for json.NewDecoder(r.Body) and io.ReadAll(r.Body), so it was
blind to io.ReadAll(io.LimitReader(r.Body, n)) — a shape ALREADY in the
package — and to any alias or helper. A completeness test that misses a
live example is worse than none, because it reads as coverage. It now
scans for the thing that cannot be spelled around, a reference to the
request body at all, and requires every FILE touching one to be
accounted for with a written reason. Both directions are asserted: an
unaccounted file fails because a door may have opened, and an accounted
file that no longer touches a body ALSO fails, so the list cannot rot
into stale excuses that quietly cover a future reader. Verified with a
positive control (an added body reference in an unlisted file fails) and
a negative one (a stale entry fails).

FOUND BY THAT WIDENED SWEEP, and fixed here rather than filed: the raw
artifact import (POST /workspaces/{ws}/import-artifact) takes TEXT, not
JSON, so it never went through decodeJSON and inherited neither the NUL
refusal nor the path/query rule — a body is neither. A raw NUL or
invalid UTF-8 reached the store and Postgres answered 22021, which the
handler turned into a 500 for what is a client error. It now applies
bindableText, the same predicate ValidatePath and ValidateQuery use, and
answers 400 invalid_body. Note the shape difference from the JSON half:
there the ESCAPE is the vector because a decoder rejects a raw NUL;
here the RAW BYTE is, because nothing is in the way.

Each fix has a mutation run against it: disabling the bundle guard fails
the bundle test, disabling the artifact guard fails the artifact test,
and both controls still pass.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): the escape gate was unsound, and YAML has its own (BUG-2803)

Codex round 4, two P1s, both reproduced before fixing.

1. THE FAST PATH LET A REAL NUL THROUGH. bodyDecodesNUL gated on "does
the raw body contain the six-character escape". That is unsound: the
BACKSLASH itself can be written as an escape, so a body carrying
\u0000 contains no literal six-character sequence anywhere in its
raw bytes, while the OUTER decode manufactures one inside the string —
and if that string is re-parsed as a JSON document (jsonEncodedFieldKeys)
the second parse turns it into a real NUL.

Measured through the real router before the fix: the oblique spelling
answered 201 where the direct one answered 400.

The mistake was applying a fact about how a NUL is spelled INSIDE a
decoded string to the RAW BYTES, where the backslash can itself be an
escape. That is the same layer-confusion this whole bug is made of, for
the third round running.

The gate is now a BACKSLASH. Every JSON escape mechanism requires one, so
a body with no backslash has decoded strings byte-identical to its raw
bytes, and a raw NUL cannot survive the decoder — no backslash therefore
means no NUL, at any depth, however spelled. Bodies WITH one pay for an
exact answer, a larger set than before (any nested JSON carries a
backslash-quote), which is the cost of being correct. The same
correction applies to the per-string pre-filter one level down.

2. YAML HAS ITS OWN ESCAPE VOCABULARY. The raw bindableText check added
last commit passes a double-quoted scalar `title: "a\0b"` — no NUL in
the request bytes — and the YAML decode manufactures one. Measured
before the fix: that artifact imported 201 with a NUL in the item title.
The decoded artifact is now checked too: title, body, and every
frontmatter field value, walked because a playbook's `arguments` is a
nested structure rather than a scalar. Keys are checked as well as
values, on the same precautionary grounds ValidateQuery states for
query parameter names.

Same shape as the JSON half in both cases: a value that is harmless
until a SECOND parse, checked at the layer that can see it.

Tests: the oblique spelling joins the nested-document table, and the
YAML escape joins the artifact table. Each is mutation-verified —
reverting the gate to the substring fails the oblique case only, and
disabling the post-decode artifact check fails the YAML case only, with
the raw-byte cases still killed by the raw check. That per-leg
discrimination is the point: it shows each check earns its own keep
rather than being covered by its neighbour.

Prose corrected where this falsified it: jsonNULEscape's "it is the ONLY
spelling" is true of the escape and was being used to justify a filter on
the raw bytes, which is a different claim. Both now say so explicitly.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): multipart text fields and the bundle manifest (BUG-2803)

Codex round 4's two P2s. Both are the same shape as the rest: a
caller-supplied string reaching a text comparison through a door the
earlier fixes did not cover.

1. MULTIPART TEXT FIELDS. The multipart body is deliberately exempt from
the JSON rule — its payload is binary blob content and must not be
scanned for text validity — but its TEXT fields are a different thing.
`item_id` goes to ResolveItem and into a database comparison exactly as
the query-string channel does, and that channel has been validated at
the transport since BUG-2784; the form channel was not. multipartValues
now drops values that are not bindable text, which makes an unusable
value indistinguishable from an absent one — the disposition
resolveUploadItemID already applies to empty values.

The uploaded FILENAME gets the same predicate, with a fallback to a
generic name rather than a refusal: the bytes are fine, only the label
is unusable.

A NEGATIVE RESULT worth recording, because it changed the test: a RAW
NUL in the multipart header is NOT the vector. Go's multipart reader
refuses it as a malformed MIME header line before any handler sees it
(measured: 400, "malformed MIME header line"). The reachable spelling is
the RFC 5987 encoded form, filename*=UTF-8''sh%00ot.png, which the
header parser accepts and percent-decodes afterwards. The first version
of this test used the raw form and was testing a vector that does not
exist.

2. THE BUNDLE ATTACHMENT MANIFEST. A second JSON document inside the
tar.gz, parsed directly like pad-export.json was, so it needed the same
check. Without it a NUL in a manifest string reached
rehydrateAttachment, whose failure is logged and SKIPPED — so the import
reported success while silently dropping the attachment. The
skip-on-failure behaviour is pre-existing and deliberate (a partial
restore beats none); refusing the bad INPUT is what stops it being
reached this way. Left as it is, and named rather than quietly changed.

A VACUOUS ASSERTION THE MUTATION CAUGHT, recorded because the test would
otherwise have shipped as coverage: the filename leg first asserted
`!strings.ContainsRune(body, 0)` on the RESPONSE, which is JSON — a NUL
in the filename comes back as the six-character escape, not as a 0x00,
so the check passed whether or not the fix was present. It did pass with
the fallback disabled. Now it decodes the response and asserts the
replacement name. The item_id leg had the mirror-image weakness: it
asserted "not a 500", which is the Postgres-only symptom, so on SQLite it
would have passed either way; it now asserts the request behaves exactly
like the no-value control.

Every fix in this commit has a mutation against it, and each kills only
its own leg.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* refactor(server): drop the now-unused escape constant (BUG-2803)

The gate became a backslash check, which was the last production use of
jsonNULEscape; golangci-lint's unused check failed on the next run. Its
documentation was load-bearing, so the explanation moved into
bodyDecodesNUL's comment rather than being deleted with the variable —
including the distinction that made the old gate wrong (the escape has
one spelling INSIDE a decoded string, which is not a claim about the raw
bytes).

Caught by re-running lint on the tip after the previous commit rather
than trusting the run from the tip before it.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): rune-safe truncation and User-Agent sanitising (BUG-2803)

Codex round 5 was asked for the POPULATION rather than a confirmation —
"enumerate every remaining way a caller-supplied string can reach a
database text or jsonb parameter without passing a validity check" — and
returned three residual classes with their sinks. Two are fixed here;
the third is filed, because measuring it needs a fixture this unit
should not grow.

1. TRUNCATION CAN UNDO THE VALIDATION. Four sites cut a caller string
with a plain byte slice (name[:120], input.Name[:200]). If the boundary
lands inside a multi-byte rune the result ends in a partial sequence and
is no longer valid UTF-8 — so a value that PASSED the body check a few
frames earlier arrives at the store unbindable, and Postgres answers
22021 for a request the server already accepted.

This is the interesting one, because no input-side round could have
found it: the defect is downstream of validation, and it is invisible
with ASCII fixtures, which is what every test in that area used.
truncateBindableText walks back off continuation bytes and drops the
straddling rune. Tested with 2-, 3- and 4-byte runes so an off-by-one
walk-back cannot pass them all, and with a counterfactual leg asserting
the naive slice really does produce unbindable output for the same
input — without it the cases would pass against an implementation that
did nothing.

2. USER-AGENT REACHES TEXT COLUMNS. It lands in activities.user_agent
(three document paths, the connected-apps revoke) and
sessions.user_agent (three login paths), and no rule here sees a header.
The disposition is SANITISE, not refuse, and that is deliberate: a
header is metadata this server chose to record, not something the caller
asked for, so a malformed one must not turn an otherwise fine request
into a 400. The two sites that HASH the header are left alone — sha256
over arbitrary bytes is well defined, and changing what is hashed would
invalidate every stored UAHash.

The filing's own earlier probe had recorded User-Agent as NOT
reproducing on the item-create path. That was true and did not
generalise; these are different sinks.

3. NOT FIXED, FILED: the OAuth form-encoded bodies
(/oauth/token, /oauth/authorize/decide, /oauth/revoke,
/oauth/introspect) parse url-encoded form data outside the shared body
validator, with connection_name reaching oauth_connections.name and
client_id reaching the oauth_clients.id lookup. This was the ORIGINAL
subject of BUG-2803 before the filing was re-scoped, and it was recorded
then as unreachable without a fosite-backed fixture. That is still true,
and round 5's sink list is far more than the filing had. Filed rather
than guessed at.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): narrow the gate, stop refusing natural-shape fields (BUG-2803)

Codex round 6 plus one measurement of my own. Three changes, one of them
a revert of something I got wrong in the previous commit.

1. THE GATE COST TOO MUCH, so it is narrower and still sound. The
previous commit gated the walk on "does the raw body contain a
backslash", which is correct but catches every body carrying nested JSON
(each `\"` is a backslash). Measured on a ~377 KB import-shaped body:
60106 allocs/op with that gate versus 30073 with the walk disabled — the
walk was running on ordinary traffic.

The gate is now the four bytes that begin any \u escape for a character
below U+0100. The argument: to manufacture the six-character NUL escape
inside a decoded string, each of its characters arrives either literally
from the raw bytes — in which case the raw contains the escape, which
begins with that prefix — or from a \u escape of its own, and the three
characters involved (backslash U+005C, 'u' U+0075, '0' U+0030) all sit
below U+0100, so those escapes begin with it too. Back to 30073
allocs/op, identical to the walk-disabled build.

That argument is the same KIND of reasoning that was wrong two rounds
ago, so it does not stand on its own: a differential test runs the gated
function against an UNGATED walk over a corpus built to attack it —
oblique backslash, upper-case hex, an escaped 'u', an escaped '0', a
doubled backslash — and fails on any disagreement. It also asserts the
corpus contains both answers, since agreement over a one-sided corpus
would be vacuous. Reverting the gate to the old substring fails it.

2. THE CHECK REFUSED THE NATURAL SHAPE OF ITS OWN FIELDS. `tags` and
`fields` accept both a JSON-encoded STRING and their natural array/object
form, and the walk propagated "this subtree is JSON-encoded" into
containers — so a free-form tag whose whole value happened to be a JSON
document was refused, though nothing re-parses it. Measured: refused
before, accepted now, while the JSON-encoded spelling of the same field
is still refused. The flag now marks only a direct STRING child of a
listed key.

3. REVERTED: I wired the three LOGIN paths to the User-Agent sanitiser
last commit, before reading store.CreateSession. It HASHES the header
and stores no text — the round-5 enumeration named "sessions.user_agent"
and I took the name for a column. The change would have been actively
harmful: login would store sha256(sanitised) while middleware_auth still
compares sha256(RAW), so every session from a client with a non-UTF-8
User-Agent would fail validation. A sink named in a review is a pointer
to verify, not a finding. The real sink is activities.user_agent, from
three document paths and the connected-apps revoke.

4. And the wiring leg codex asked for, on that real sink: a request
through the router with a malformed header, reading the STORED value out
of the activities row, with a control asserting an ordinary header is
kept VERBATIM. Unwiring the production call site fails it; the helper's
unit test does not notice.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): apply the key rule at every level, not once (BUG-2803)

Codex round 7, both findings, the first confirmed by measurement.

1. THE RECURSION WENT ONE LEVEL TOO DEEP. Once the walk descended into
a JSON-encoded string it treated the WHOLE subtree below as
JSON-encoded, so a value nested two levels down — an ordinary string
inside a `fields` blob that happens to hold JSON text — was refused.

That is a false rejection, and the measurement says so plainly. With the
depth-2 check disabled, on Postgres 17:

  depth 1 (the fields blob itself)     -> 400   (correct: Postgres parses it)
  depth 2 (a string INSIDE the blob)   -> 201   (accepted, no error)
  control                              -> 201

The handler parses `fields` ONCE. The inner text is re-escaped when the
blob is written, so what Postgres receives has a doubled backslash and no
escape at all. Only the document Postgres itself parses can carry a fatal
one.

The nested call now passes false rather than true, which makes this a KEY
RULE APPLIED AT EVERY LEVEL rather than a depth limit: a JSON-encoded key
INSIDE a document still recurses (pinned by a test), an ordinary one does
not. Same correction as round 6's natural-shape fix, one level further in
— I fixed the sibling case and left this one, which is CONVE-18's lesson
about my own enumeration being a sample too.

I checked whether anything re-parses a value inside the blob before
loosening this, rather than assuming: `arguments` was the candidate, and
parsePlaybookArguments asserts it is a native ARRAY (raw.([]any)) rather
than a JSON string, so it is covered by the natural-shape rule and needs
no second parse.

2. AN ERROR MESSAGE THAT SENT CLIENTS THE WRONG WAY. The OAuth dynamic
client registration handler prefixed every decode failure with "Request
body must be JSON". A body carrying a NUL is valid JSON, so that message
sends a client hunting a syntax error it does not have. The two failures
are now distinguished.

Round 7 also reports no break in normal CLI, MCP or web-client request
generation — they marshal JSON and encode paths and query parameters —
which is the first thing any round has said about the client surface.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): complete the artifact check, make the walk path-aware (BUG-2803)

Codex round 8. It confirmed round 7's two fixes, then found two real
defects and two inaccurate comments — the comment half being the angle
the round was asked for.

1. THE ARTIFACT CHECK MISSED TWO REACHABLE FIELDS. artifactIsBindableText
walked the decoded artifact by TYPE, so it never covered Provenance —
whose strings are rendered into a Markdown footer appended to the stored
content — and never matched Arguments, declared []map[string]any, a
concrete slice type the walk's []any case does not match. A YAML NUL
escape in either reached storage.

It now MARSHALS the artifact and searches the output for the escape
encoding/json produces. A type switch over a struct that grows is a list
that goes stale in silence; marshalling covers every exported field,
including ones added later. The one thing it cannot see is invalid UTF-8
(which marshals to U+FFFD), and it does not need to: step 2 rejects that
in the request bytes, and YAML cannot manufacture it from valid input —
its escapes name code points, where \0 names a NUL.

Both new cases fail with the check disabled; the raw-byte cases still
pass, killed by the raw check, so each leg is discriminating.

2. THE WALK WAS NOT PATH-AWARE. A collection may declare a user field
literally named `schema` or `tags`. The walk consulted the wire-key list
at every level, so `{"fields":{"schema":"..."}}` treated a user field
name as a wire key and refused valid text holding a JSON example.

The key list is now consulted only OUTSIDE caller data — not under a
natural `fields` object, not inside an element of a `tags` array, not
inside a re-parsed document. Combined with round 7's fix that makes the
descent exactly one level deep BY CONSTRUCTION, which is why the depth
counter is gone: with the flag no longer inherited, a bound could never
fire, and dead protection reads as protection. The depth-bound test is
replaced by one that pins the property directly — an escape IN the
parsed document is refused, one BELOW it is accepted, and a
wire-key-shaped user field does not restart the descent.

3. THREE COMMENTS CORRECTED, all mine, all of the kind a reader would
believe without checking:

- MaxBytesReader: Close FORWARDS to the underlying body rather than
  being a no-op, and with a nil writer there is no automatic 413 — the
  cap surfaces as a read error the callers turn into 400. Behaviour
  unchanged; only the claim was wrong.
- parseArtifactRequest said "three checks" while implementing five, and
  its returns list omitted ErrArtifactUnbindableText. Both added by this
  branch, which is exactly the prose a change is most likely to falsify
  (CONVE-23).
- errJSONBodyNUL claimed all 65 callers surface its message. The STATUS
  is uniform; the wording is not — several substitute a generic string.

4. And one in a test: the timeline fixture said both backends hold a
CHECK constraint a raw NUL violates. items.fields is a plain TEXT column
with no CHECK on SQLite. What was OBSERVED is "SQL logic error:
malformed JSON"; the likely source is an expression index over
json_extract, and that attribution is recorded as NOT verified rather
than asserted.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): a regression this branch introduced, and the same trap again (BUG-2803)

Codex round 9. Both findings are mine, one of them a regression from the
round-8 restructure two commits ago.

1. THE ROUND-8 RESTRUCTURE REOPENED THE ORIGINAL DOOR. Taking the
JSON-encoded branch for a listed key skipped the plain "does this string
contain a NUL" check and asked only "does the document this string
carries hold an escape". Those are different questions. So
{"fields":"a<NUL escape>b"} — a direct NUL in the fields value, the very
first case this whole change closed — was accepted again.

Both checks now run. The test pins all three legs: a direct NUL in the
fields string, an escape inside the fields document, and an ordinary
fields string that must still be accepted, so the first two cannot pass
merely because everything under a listed key is refused.

2. THE ARTIFACT CHECK FELL INTO THE TRAP IT WAS WRITTEN AGAINST. It
searched the MARSHALLED bytes for the escape sequence, and a value
holding the six LITERAL characters marshals to a doubled backslash which
still contains that sequence as a substring — so valid content was
refused. Artifacts are documentation; text about a JSON escape is
exactly what one carries.

Worse than the bug: the comment I wrote asserted the ambiguity "cannot
arise here". It was the same doubled-backslash case bodyDecodesNUL exists
to resolve, one function away, and I wrote a sentence explaining why it
did not apply instead of checking. The marshalled form is now decoded
again and walked with the same machinery — the round trip is what makes
every field reachable without a type switch, the walk is what makes the
answer exact.

Its test asserts literal escape TEXT is accepted in title, body and a
field value, with a counterfactual leg asserting a real NUL in each of
those places is still refused, so acceptance cannot come from the check
doing nothing.

Reverting either fix fails its test and only its test.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* docs(backup): the one case where an export is not importable (BUG-2803)

Codex round 12, an operational pass. It found no migration or config
requirement, and two documentation gaps.

docs/backup.md promises that application-level export/import is portable
across SQLite and PostgreSQL. Since BUG-2803 that has one exception: a
workspace whose stored data contains a NUL exports fine and is refused on
import. It can only affect data written before the rule existed and only
on SQLite, which accepted it — a PostgreSQL instance never stored one.

`pad db migrate-to-pg` has the SAME problem and reports it worse: it
copies rows directly and never passes through the import guard, so a
legacy row fails against PostgreSQL's JSONB parser partway through the
copy rather than being refused up front. That is the likelier way an
operator meets this, since it is the operation that puts an entire old
SQLite database in front of PostgreSQL for the first time. Recorded on
BUG-2810, which owns the preflight and repair.

Round 12's other finding — that the PR's stated release note covered the
JSON 500-to-400 change and none of the rest — is fixed in the PR body
rather than in the tree.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* test(server): close two blind spots the tests themselves had (BUG-2803)

Codex round 13, asked whether the new TESTS are sound. Five findings;
these are the two that were self-contained. The other three are recorded
on the item with what each needs.

1. THE COMPLETENESS SCAN WAS BLIND TO FORM BODIES. It matched only
`.Body`, so FormValue / ParseForm / MultipartForm — which read the
request body just as surely — were invisible. It therefore reported full
coverage while the OAuth form-encoded handlers were entirely outside its
view. Widened, and it immediately failed on handlers_oauth.go, which is
the instrument working.

That file is now ACCOUNTED FOR AS A KNOWN GAP rather than as safe: the
OAuth handlers read form-encoded bodies that no rule in this family
covers (the transport rules see the query half of r.Form, not the body
half), tracked as BUG-2811 and needing a fosite-backed fixture to
measure. The test now STATES the gap instead of being blind to it, which
is the difference between a completeness claim and a completeness
appearance.

2. THE TRUNCATION TEST ADMITTED AN IMPLEMENTATION THAT RETURNED "". Its
assertions were: within the limit, bindable text, a prefix of the input.
An empty string satisfies all three. It now also asserts that an input
fitting the limit comes back UNCHANGED, and that no more than one rune
(4 bytes) is lost to the boundary — so a truncator that drops too much
fails, not just one that keeps too much.

Both were found by asking whether a broken implementation would pass,
which is the question CONVE-12 is about and which I had applied to the
production code and not to these two tests.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* test(server): the three remaining round-13 gaps (BUG-2803)

Codex round 13's other three findings, all of the same shape: a test
that would stay green with the production change reverted.

1. THE MANIFEST CHECK WAS UNTESTED. The bundle test built archives
containing only pad-export.json, so disabling the INDEPENDENT attachment-
manifest check left the suite green. The new test builds a bundle with
both entries, differing only in the manifest, so a refusal cannot come
from the export half. Verified by disabling each check separately: only
the matching test fails, so the two are independently covered.

2. THE TEST-EMAIL CHANGE HAD NO HANDLER-LEVEL TEST. Every existing leg
exercised decodeJSON, so reverting handlers_admin.go to default EVERY
decode failure to the admin's own address passed them all. The new test
drives the real endpoint with a wired mock sender and pins the
distinction that used to collapse: an ABSENT body still means "send it
to me" (control), an ordinary body still sends (control), and a body that
is present and refused answers 400 rather than being reinterpreted as
the default recipient.

3. THE MULTIPART LEG CHECKED ONE BYTE CLASS. A filter rejecting NULs
while letting malformed UTF-8 through would have passed it. It now drives
both, which matters because invalid UTF-8 is the class that reaches
Postgres as 22021 on a UTF8 database.

Round 13 was asked whether the new TESTS are sound — deterministic,
order-independent, and failing on broken code. It reported the fixtures
isolated and found five ways they were not discriminating. Two were
fixed in the previous commit; these are the rest.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* test(server): pin the wiring at every call site, not one (BUG-2803)

Codex round 14 confirmed round 13's five, then found the same shape one
level out: reverting a SINGLE call site back to the unsafe form left the
whole suite green, because the surviving fixtures are ASCII and a
helper's unit test does not care who calls it.

TestTextSafeHelpersAreUsedAtEveryCallSite asserts the wiring STATICALLY
rather than adding a fixture per site (an OAuth connection, a cloud
login, four audit paths). A byte-slice truncation of a caller string
fails it, and so does a raw User-Agent read outside the exempt set. Both
directions are checked: finding none of the SAFE form also fails, so a
scan that silently matched nothing cannot pass forever.

The User-Agent exemptions carry counts rather than being blanket, so a
NEW raw read in an exempt file still fails. All four reads in
handlers_auth.go are exempt because they feed a HASH — CreateSession
hashes the header and stores no text — and sanitising before hashing
would be actively harmful: login would store sha256(sanitised) while the
session check still hashes the RAW header, failing validation for every
client with a non-UTF-8 User-Agent. middleware_request_text.go's one raw
read is requestUserAgent itself.

Verified by reverting one truncation call site and one User-Agent call
site independently; each fails the test.

Round 14's third finding is fixed behaviourally rather than statically,
because the static scan cannot see it — handlers_oauth.go is already
listed for its form-body reads. TestOAuthRegisterRefusesNULBody drives
the real dynamic-registration endpoint with cloud mode and an OAuth
server wired, with a control leg registering successfully, and pins both
the refusal and the message split: the body IS valid JSON, so the answer
must not send a client hunting a syntax error.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): match wire keys the way the decoder does (BUG-2803)

Codex round 16, asked whether this change is consistent with its siblings
in the same file and extensible by someone who did not write it. It found
a live bypass instead.

encoding/json matches an incoming key to a struct field by an exact match
first and a CASE-INSENSITIVE one otherwise, so {"Fields":...} and
{"FIELDS":...} land in ItemCreate.Fields exactly as {"fields":...} does.
The walk looked the key up case-SENSITIVELY, so it skipped the nested
document for a body the handler went on to accept, and the database
answered the original 500.

Measured before the fix: `fields` refused, `Fields` and `FIELDS`
accepted.

This is the same defect shape as everything else in this unit — a check
that agrees with one layer's rules while the layer that actually consumes
the value uses different ones — which is why the fix is a PREDICATE
rather than a wider map: the map is the vocabulary, and the matching RULE
belongs to the consumer. Someone adding a key should not also have to
remember to add its spellings.

The test drives six spellings including mixed case, with a control
asserting an unlisted key stays caller data in any casing, so this is
case-insensitive matching rather than matching everything.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): fold keys the way encoding/json folds them (BUG-2803)

Codex round 17, first of five findings. The previous commit fixed the
ASCII half of key matching and left the Unicode half, which is this
bug's own pattern one more time.

encoding/json matches with Unicode SIMPLE FOLDING, not lower-casing.
U+017F LATIN SMALL LETTER LONG S folds to 's', so "ſchema" reaches the
`schema` struct field while strings.ToLower("ſchema") is unchanged and
missed the allowlist — a nested NUL under that spelling reached the
handler undetected.

Matching is now strings.EqualFold against each canonical key. The test
carries both a lower-case fold spelling and an upper-case one alongside
the ASCII cases, and keeps its control asserting an unlisted key stays
caller data in any casing.

The other four round-17 findings are recorded on the item rather than
patched here: they are genuine layer disagreements (duplicate keys
merging differently in a typed decode than in a map, a scan-failure
disposition on inputs the typed decode tolerates, and unknown-field
policy) whose fixes are design decisions rather than corrections, and
this seat is near its context bar. Each is written up with the
measurement it needs.

Claude-Session: https://claude.ai/code/session_011T365kP1N9V88y15HxL4YN

* fix(server): pin that a NUL-bearing manifest refusal keeps the partial workspace (BUG-2803)

Codex round 18. The comment on the manifest NUL branch said refusing the
input "stops it from being reached this way" and stopped there, which
reads as though the refusal undoes the import. It does not.

A plain error with a non-nil workspace keeps the partial workspace,
exactly as every other manifest failure in this loop does — the rollback
branch fires only for *importStatusError, and mid-stream manifest
failures intentionally keep what was imported (TASK-896). Returning a
rollback-shaped error here would give NUL-bearing manifests different
semantics from malformed ones, which is a change to the bundle-import
contract rather than a fix to this bug.

So the behaviour is unchanged and now DELIBERATE: the comment states it,
and the test asserts the persisted state rather than only the HTTP
answer. Mutation: routing the branch through *importStatusError makes
the refusal roll back, and the new assertion fails naming the release
note it would falsify. The pre-existing status/body assertions do not
notice.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* docs(server): record the four map-model disagreements as dispositions, and pin them (BUG-2803)

Lead ruling day-68 is land-and-follow: this branch lands on its measured
commits, and the token-stream rewrite is the BUG-2812 unit's spec rather
than a late restructure of an 18-commit branch under review pressure.
That makes the four open findings from rounds 16-17 something to WRITE
DOWN precisely, not something to leave in a trail comment.

The doc comment on bodyDecodesNUL now carries all four, with the one
root cause named: this scan decodes into map[string]any and the typed
decode does not agree with that model about keys. Two under-refuse
(duplicate-key merge; scan-failure passthrough) and are BUG-2812's spec
- both dissolve under a walk that never builds values. Two over-refuse
(unknown fields; case-variant duplicates) and are ACCEPTED, because
refusing is the safe direction. The asymmetry is stated rather than
smoothed over: within the map model, (1) and (4) are one defect seen
from two sides and only one of them fails safe.

Finding (3) is an observable compatibility change - a forward-compatible
field carrying a NUL escape now gets a 400 where it got a 200 - so it
goes in the release note as well as here. A qualification only protects
where the actor meets it.

All four are pinned by a test, measured on this tip rather than carried
over from the round-16/17 write-up. The two known-gap legs assert the
WRONG answer on purpose: when BUG-2812 lands they FAIL, naming the doc
comment and the release note as what to update. Both gap legs carry a
premise assertion - the same bodies with the disagreement mechanism
removed ARE detected - without which they would pass against a check
that detected nothing.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* test(server): wire release-note item 10 to the router, with its before-state measured (BUG-2803)

The disposition test proves bodyDecodesNUL RETURNS true for an unknown
field carrying a NUL escape. The release note claims the API answers
400. Those are different claims and only the second one is what an
operator or client author reads - CONVE-19, my own convention: a
direct-call test vouches for the component, not its binding.

Two legs, and the control is the load-bearing one. An unknown field with
an ordinary value must still be ACCEPTED, so this pins "refused for the
NUL" rather than "refused for being unknown". The handler does not
reject unknown fields; if it ever started to, the note's explanation
would be wrong while its status code stayed right, and no
status-code-only assertion could see that.

The before-state is measured rather than asserted from memory. Disabling
the check makes the same request answer 201 - which is main's behaviour,
since decodeJSONWithLimit there unmarshals straight into the typed value
and the key is dropped. So "answers 400 where it answered 200" is a
measurement in both directions, not a recollection of one.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* docs(backup): the NUL rule lives in the binary, not the database (BUG-2803, BUG-2813)

Codex round 19, the fresh-angle deploy/rollback/mixed-version pass.

docs/backup.md said a NUL-bearing row "can only affect data written
before that rule existed, and only on SQLite". The second half is true.
The first half is false, and the reason is the interesting part: the
guard is in decodeJSONWithLimit, so the invariant is a property of the
running BINARY, not of the database.

On SQLite any window where an older binary serves the same database can
still write one - a rollback after upgrading, a staged rollout with an
old and a new instance sharing a database, a second older instance on
the same file. The window closes, the guard returns, and the rows are
already stored, behaving exactly like genuinely old ones. A rollback is
an ordinary operational move, so this is not an exotic path.

The doc now states the binary-version dependence, says which dialect is
affected and why PostgreSQL is not (it refuses a NUL itself, at every
version), and gives the operational answer: drain writes from older
binaries before the new one serves, or roll forward rather than back.

Store-layer enforcement - so the running build stops mattering - is
filed as BUG-2813 rather than added here. It is a dialect-level change
and the day-68 ruling on this unit is land-and-follow.

The same false implication was carried by the PR's release note calling
such a workspace "legacy"; corrected there too.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* docs(server): cite the ruling in house style, not the team-room day counter (BUG-2803)

"lead ruling day-68" is the internal day counter, which means nothing to
anyone reading this repo and is inconsistent with every other citation
in it - the codebase cites a lead ruling by DATE or by BUG ref, never by
day-N. Replaced with the bug ref, which is the part a reader can
actually follow.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* docs(server): drop a commit count I had already measured as wrong, and stop asserting a cause I borrowed (BUG-2803)

Two defects in a comment I wrote an hour ago, both of the kind this
unit's trail keeps recording.

"an 18-commit branch" - the branch was 20 commits at b0192871 when I
counted it this session, and is more now. 18 came from the previous
checkpoint's own miscount, which I had ALREADY identified and written up
before I typed it again here. A number that arrives inside a sentence
about something else does not feel like a claim, which is exactly why it
survives. The count is incidental to the argument, so it is gone rather
than corrected - a figure that has to be maintained to stay true is a
liability in a doc comment.

"this branch's one regression came from exactly that" - the ruling's
reasoning, restated by me as a verified fact. The regression I know
about came from wiring a fix off a reviewer-named sink list without
reading the mechanism, which is adjacent to "restructuring late under
review pressure" but is not the same mechanism, and I did not check
whether it is the one the ruling meant. Now attributed to the ruling and
stated as its reasoning, with the part I can defend - the review loop
finding something in nearly every round indicates a design problem -
carrying the argument.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* fix(server): sanitise the MCP audit tool_name, and correct three claims wider than their evidence (BUG-2803)

Codex round 20, asked for a POPULATION rather than a confirmation
(CONVE-24). It returned a covered list AND four findings; this commit
carries the two that belong to this unit plus the doc corrections.

## The door: MCP audit is a second reader, not a pass-through

parseMCPRequestBody runs its OWN json.Unmarshal and binds the decoded
method / params.name to mcp_audit_log.tool_name, TEXT NOT NULL. A
six-character NUL escape therefore arrives as a real NUL: PostgreSQL
refuses the audit INSERT with 22021 - the exact symptom this unit exists
to remove - and SQLite stores an unprintable tool name. Nothing upstream
catches it; the /mcp transport decodes the JSON-RPC envelope itself
rather than through decodeJSON, so the body rule never sees the request.

Measured before fixing: the decoded name reached the column intact.

This unit's own completeness map had CERTIFIED that reader as safe, on
the grounds that "decoding still happens in the MCP dispatcher". That is
true and it does not bear on what this middleware persists - a correct
description of a mechanism, with no question asked about what it does,
sitting in the one artifact whose job is to say the population is
covered. Corrected there too.

Disposition is SANITISE, not refuse, following the User-Agent precedent
from earlier in this unit, and the rule now lives in one extracted
helper (sanitiseStoredText) with the reasoning attached: the body rule
refuses because the caller asked to store that value; this serves
metadata the SERVER elected to record, where failing the write would
lose the audit row for precisely the request most worth auditing.

Both caller-derived returns are cleaned inside parseMCPRequestBody, so
both call sites - the ok path and the denied path - are covered at the
choke point rather than at either caller. Both are tested: params.name
AND the method path. Mutations un-sanitising each one compile and kill
only their own leg.

## Three claims corrected, all wider than their evidence

- "all 65 call sites" in server.go: measured 70. Removed rather than
  corrected, because the number has to be maintained to stay true and
  says nothing the sentence needs.
- docs/backup.md said a NUL "cannot be stored in a text or JSON column"
  absolutely, two paragraphs above my own text explaining that SQLite
  accepts one. Now stated as what it is: an application rule Pad
  enforces on both dialects, which is exactly why it has to be enforced.
- artifact_import.go said such a value "cannot be stored under any
  encoding this product supports". Refuses, not cannot - stating a
  policy as a capability tells the next reader SQLite enforces
  something it does not.

## Filed, not fixed

BUG-2814 - guarded writes re-emit at-rest NULs (move/copy/restore/
fields-patch), propagating a legacy value to rows that never had one.
Distinct from BUG-2813: that one is about writing a NUL while an old
binary serves, this is the fixed binary SPREADING one already present.
Both dissolve under the same store-layer enforcement, so they are filed
to be designed together rather than patched at each of a long and moving
list of re-emit sites.

Declined: round 20 also reported the release-note assertions as
unsupported. They live in the PR body, which a read-only sandbox cannot
see - the claim is about the reviewer's visibility, not the diff.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* fix(server): sanitise before testing for emptiness, so the audit fallback survives (BUG-2803)

Codex round 21 ranked this the most dangerous un-probed lens, and it is
a boundary my own round-20 fix created.

parseMCPRequestBody tested env.Method == "" and p.Name == "" BEFORE
sanitising. A value made entirely of NUL escapes is non-empty as
decoded and empty once cleaned, so it passed over the fallback and was
then blanked - storing an empty tool_name in a TEXT NOT NULL column.
That is exactly the silent drop the "(unknown)" / "tools/call"
fallbacks exist to prevent; the function's own doc comment says so.

Measured before fixing: both shapes returned an empty tool_name.

Fixed by ordering rather than by adding guards - clean first, then test
- so the invariant is structural instead of something each return has
to remember. Same by-construction preference as the symmetric-gate fix
earlier in this unit.

Worth recording that my first patch was WRONG in a way that compiled:
I put the sanitise above the json.Unmarshal that populates env, so the
method would always have been empty. Caught by printing the patched
function and reading it, not by trusting the script saying "patched".

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* fix(server): classify MCP audit on the raw method, and trim only JSON whitespace (BUG-2803)

Codex round 22. Two P2s, both measured before fixing.

## A forgeable audit row - my own regression from the round-21 fix

The round-21 change reordered sanitise-before-compare so the fallback
would survive an all-NUL value. That reorder made the CLASSIFICATION
read the sanitised method, so "tools/<NUL>call" cleaned up INTO the
literal "tools/call" and the parser then lifted params.name and hashed
the arguments for a method that was never tools/call.

Measured: tool_name="pad_item" with a full 64-character args_hash - an
audit row indistinguishable from a genuine pad_item call, mintable by
anyone who can send a request. Worse than the review described it.

Fixed by splitting the two jobs, which were never the same job:
dispatch decisions read what the client actually SENT; sanitising is
for the value that gets STORED. The round-21 boundary is preserved -
a method empty only after cleaning still falls back to "(unknown)".

Fixing one boundary and creating another in the same function is worth
naming: the reorder was correct for the case it addressed and I did not
ask what else read that value.

## Go whitespace is not JSON whitespace

The empty-body shortcut used bytes.TrimSpace, i.e. unicode.IsSpace,
which strips \v, \f, U+00A0 and more. encoding/json accepts none of
them. So a body of just \v trimmed to empty, returned io.EOF, and an
EOF-tolerant caller - playbook run treats errors.Is(err, io.EOF) as "no
arguments supplied" and runs anyway - took a syntactically invalid body
for an ABSENT one.

Now trims exactly the four bytes JSON calls whitespace. The test drives
both directions, because only the pair discriminates: real JSON
whitespace must still shortcut to EOF or the playbook contract breaks,
and non-JSON whitespace must not or the divergence survives. Reverting
to TrimSpace compiles and fails three legs.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* test(server): give the walker an independent oracle, not one that shares its code (BUG-2803)

Codex round 22, finding 3. TestBodyDecodesNULGateAgreesWithAnUngatedWalk
compares the gated function against an "ungated" reference that calls
the SAME production valueDecodesNUL. That is valid for what the test
claims - it pins the raw-prefix GATE - but it structurally cannot see a
defect in the WALKER, because such a defect is present identically on
both sides and cancels.

That matters here specifically: every walker defect this unit has had
lived in traversal, descent, or key matching (rounds 1, 2, 4, 16, 17),
which is exactly the part the differential cannot check.

Added a second implementation of the contract, written in the test and
deliberately not calling the production walker. It shares encoding/json
and jsonEncodedFieldKeys; it does NOT share traversal, descent, or
key-matching. It is iterative with an explicit stack rather than
recursive, so a recursion-shaped bug cannot reproduce in it by accident.

Demonstrated rather than argued. With the nested-document descent
removed from the production walker - a mutant that reopens the exact
door this unit exists to close, and which compiles:

  differential (gate vs ungated)   ok      <- blind, as the finding said
  independent oracle               FAIL    <- catches it

The corpus is also asserted to contain BOTH answers, since two walkers
that always answer false agree perfectly.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* test(server): make the body-reader inventory type-aware, and state what it still cannot see (BUG-2803)

Codex round 22, finding 4. The inventory that claims every request-body
reader is accounted for was lexical, and wrong in three ways - all in
the direction that matters for a test whose job is to say nothing is
invisible:

  - it recognised only the variable names r and req, so a handler
    holding its request as httpReq or orig was INVISIBLE;
  - it matched inside COMMENTS, so prose could make a file look scanned;
  - the manually-listed traits field was already evidence of the
    model-regex blind spot.

My first fix broadened the pattern to any identifier. That was worse,
and worth recording: it matched every unrelated .Body field - input.Body
in comments, fetched.Body in url import, comment.Body, art.Body,
sidecarErr.Body - flagging five files that read no request body at all.
The only route to green would have been listing those five as
accounted, and an accounting entry HIDES future readers in its file. A
false entry is worse than a missing one, so I abandoned that approach
rather than tuning the regex.

Now keyed on the TYPE via go/ast: collect identifiers declared
*http.Request in a function signature, then find reader selectors on
exactly those identifiers. Names stop mattering, comments are not in the
AST, and .Body on anything else is not a match.

Positive control, run rather than argued: a handler taking httpReq
*http.Request and reading httpReq.Body is FLAGGED by the new scan, and
matched zero times by the old regex.

Two limits now stated in the test, because an unqualified completeness
claim is exactly how the MCP audit reader got certified safe while
persisting a decoded NUL: accounting is per FILE rather than per call
site, and only signature-declared requests are seen - one stashed in a
struct field or captured by a closure is not a parameter.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* fix(server): mark a cleaned audit identity, and repair two vacuous tests of my own (BUG-2803)

Codex round 23, plus a defect in my own instruments that the mutation
matrix found and the tests hid.

## Cleaning is lossy, so a cleaned identity was forgeable

Round 22 closed the coarse version: sanitising before classifying let
"tools/<NUL>call" become a genuine tools/call. Classifying on the raw
method fixed that. But sanitising still COLLAPSES distinct inputs onto
one output, so "pad_<NUL>item" stored exactly what "pad_item" stores -
same tool_name, same args_hash - and anyone able to send a request could
mint an audit row and a Prometheus label attributed to a real call.

Cleaning and identity are different jobs. sanitiseStoredTextChanged now
reports whether anything was removed, and an identity that only became
well-formed by cleaning is marked. The cleaned text is kept, so the row
stays diagnosable; the marker keeps it distinguishable. Descriptive text
(User-Agent) keeps the unmarked helper - nothing decides anything on it.

The parenthesised form is what this file already uses for a synthesised
value, and a real method or tool name does not begin with "(", so the
marker cannot itself be forged by choosing a clever name.

## Two of my own tests were vacuous, found by a surviving mutant

I wrote nul := "\u0000" in the round-21 and round-23 tests, which in Go
is the NUL CHARACTER, not the six-character escape text. Those bodies
were malformed JSON that encoding/json rejected, so neither test ever
reached the path it named. The comment on the line said "the escape, not
the character"; the code did the opposite, and the correct form was
already three lines away in the round-20 test.

Nothing in the test output showed this. It surfaced only because the
marker mutation SURVIVED, and because a surviving mutant was treated as
a question - does the test not discriminate, or did it not run - rather
than as either answer.

Both repaired and both now kill their mutants: removing the marker fails
with tool_name="pad_item" and a matching 64-character hash; removing
the emptiness guard fails with "(sanitised) " instead of "(unknown)".

Correction for the record: the round-21 checkpoint said that fix was
measured failing before the fix. That measurement used the broken
literal. The finding was real and the fix is right, but it is only
properly established as of this commit.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* test(server): use the canonical escNULLiteral helper, not a local literal (BUG-2803)

The helper is assembled from bytes precisely so this escape cannot decay
into the NUL character it describes, and its comment says so: written as
a Go literal it is one backslash away from being the NUL itself.

I rolled a local one in three tests anyway, and two of them decayed
exactly as that comment predicted - vacuous until the mutation matrix
caught them. The safeguard existed, was documented, and I walked past
it; using it is the only version of this fix that cannot recur.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* fix(metrics): bound the cleaned-identity marker as a metric label, and correct a false cardinality claim (BUG-2803, BUG-2817)

Codex round 24, which enumerated CONSUMERS of the values this unit
changed rather than asking again whether the guard is right. Most of
that enumeration came back FINE, which is the useful half; three
findings did not.

## The marker must not reach Prometheus as part of a name

The cleaned-identity marker is right for the audit ROW - an operator
reading one row needs to know which tool it resembles. It is wrong for
a metric SERIES: "(sanitised) pad_item" and "pad_item" would be two
series per user and per status, for a distinction no aggregate query
asks. metricsToolLabel collapses the marked form to the bare marker, so
it costs exactly ONE extra label value in total and that value is a
constant rather than anything a caller supplies.

Two tests, and the second exists because the first is not enough. The
direct-call test proves the collapse function collapses. The WIRING test
proves the emit path calls it - CONVE-19, my own convention. Measured:
with the call removed from recordMCPCallMetrics, the direct-call test
stays green and the wiring test fails naming the leaked label.

## A cardinality claim that was never true

internal/metrics documented the tool label as "bounded by the catalog
(~7 tools today)" with arithmetic resting on that. The value is
whatever the caller put in params.name, recorded even for requests that
dispatch later rejects, so an authenticated caller can mint a series per
request. The comment now says so and points at BUG-2817, filed with the
fix shape and the two wrinkles it has to decide - the catalog lives in
internal/mcp, and legitimate JSON-RPC methods are not catalog tools.

That unboundedness is PRE-EXISTING and not this unit's to fix; bounding
the marker's own contribution is, which is why the collapse is here and
the rest is filed.

Also corrected: I wrote BUG-2815 into two comments before filing, and
the filing came back BUG-2817. Predicting an identifier is the same
class of claim as predicting a count.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* fix: keep a storable extension in the filename fallback, and sync the rename draft (BUG-2803)

Codex round 24, the two remaining consumer findings. Both trace to this
unit, and both are cases where a value was made SAFE without asking what
reads it.

## The filename fallback was lossier than its sibling

An unstorable upload name became a bare "upload" - no extension - while
the empty-name fallback two lines below has always produced
"upload.bin". The unusable part of "sh<NUL>ot.png" is the STEM; ".png"
is ordinary text, and it is what consumers dispatch on:
Content-Disposition, the web download anchor, bundle export naming, and
, whose documented contract is handing a path to
something that opens files by extension. That command was measurably
affected - it treats any non-empty stored name as authoritative, so its
MIME-based extension fallback never ran and the temp file was
extensionless.

Fixed at the source: a storable extension survives the fallback,
bounded to 16 bytes so a hostile name cannot smuggle a long tail
through. The CLI keeps a defensive extension fallback for any
extensionless stored name, which also covers rows written before this.

Both directions are tested: "sh<NUL>ot.png" now stores "upload.png",
and "shot.p<NUL>ng" - where the EXTENSION is the unusable part - still
stores bare "upload". Without the second leg, "keep the extension"
could quietly become "keep whatever trails the last dot" and reintroduce
the value the fallback exists to remove. Dropping the extension again
fails the first leg.

## A rename that could never come clean

saveName replaced the app object but never updated the draft, so when
the server normalised the name the draft stayed as typed, the equality
check never matched, Save stayed enabled, and each press re-sent the
same request. The server caps at 120 BYTES via rune-safe truncation
while the input allows 120 CHARACTERS, so any multibyte name near the
limit diverges.

The draft is now assigned the value the server actually STORED rather
than compared for length, which stays correct for any future
normalisation. svelte-check: 0 errors.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* fix: reserve the synthesised-value namespace, and stop a fallback carrying an unvetted extension (BUG-2803, BUG-2818, BUG-2819)

Codex round 25, which probed whether the values this unit SYNTHESISES
can themselves be attacked. Earlier rounds asked whether the guard
refuses bad input; this asked what the substitutes are worth.

## A fallback must not carry an extension the product would refuse

Preserving a storable extension was right; bindableText was the wrong
bar for it. Control characters are valid UTF-8 and not NUL, so they are
storable - and they are STRIPPED when the name is written into
Content-Disposition. So ".s<VT>vg" passes the extension blocklist, which
sees no known extension, and reaches the client as ".svg".

attachments.SafeFallbackExtension now requires a KNOWN, ALLOWED
extension, so a synthesised name can only carry a suffix the product
already accepts on the ordinary path. Tested both ways: an obfuscated
.svg and an unknown .foo are both dropped to bare "upload", while
.png still survives.

That divergence is PRE-EXISTING on the ordinary path, where the caller's
name is stored as given and no fallback is involved - filed as BUG-2818
with the fix shape. This change only declines to add a second door.

## A mutation exposed a guard that could not fire

I first wrote an explicit alphanumeric loop in that predicate as well.
Removing it changed nothing: no key in extMIMEMap contains a
non-alphanumeric character, so the map lookup already excluded every
obfuscated suffix. Keeping an unreachable guard whose comment claims it
stops control characters would have misdescribed which line does the
work - so the loop is gone, and TestExtMIMEMapKeysArePlain enforces the
property it was relying on. A guard that survives its own mutation is a
question, not a clearance.

## The marker was forgeable, so the namespace is reserved

Marking only what cleaning changed was not enough. A caller may name a
tool "(unknown)" - what the parser returns for a malformed body - or
"(sanitised) pad_item", and a genuine request then records the same
identity as a substituted one. The older sentinels always had this;
the new marker inherited it.

A leading "(" is now reserved for values this server synthesises, and
any caller value entering that namespace is marked too, so the two
never collide. Cost stated: an MCP tool genuinely named with a leading
"(" is recorded marked; tool names are identifiers in every catalog
this server knows.

The principled fix for the whole class is a provenance FIELD rather than
sentinel strings in a caller-controlled namespace. That is BUG-2819 - it
is a migration on two tables, and the same trick cannot rescue attachment
filenames, which are legitimately named with parentheses.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* test(server): fix the independent oracle, which was wrong in a branch its corpus omitted (BUG-2803)

Codex round 26, finding 5, and it lands on the instrument I introduced
two rounds ago to check the walker.

The oracle descended into a listed key's JSON document whenever it met
one - including when that key appeared INSIDE a natural object that was
itself under a listed key. Production does not: a natural object or
array under a listed key is USER DATA, because the server marshals it
and nothing re-parses it, so a listed key appearing inside it is an
ordinary field name rather than a document marker.

Measured on {"fields":{"schema":"<escape text>"}}: production=false,
oracle=true. Production is RIGHT and the oracle was wrong, so had that
body been in the corpus the test would have failed and pointed at the
production walker.

It was not in the corpus. That is the part worth keeping: the test
already asserted its corpus was not one-sided - that BOTH answers
appear - and that check passed while a whole branch of the contract went
unexercised. Both answers appearing is not the same property as every
branch being covered, and I had treated it as though it were.

Fixed by giving the oracle the same user-data rule, and both bodies are
now in the corpus - the natural-object case that must answer false, and
its string-valued counterpart that must answer true.

Re-verified that the correction did not blunt it: with the production
nested descent removed, the oracle still fails.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* fix: refuse path-component filenames, and single-source the MIME extension table (BUG-2803)

Codex round 26, findings 2 and 3.

## ".." is not a filename, it is a path component

The server guard listed "", "." and "/" but not "..", which survives
bindableText. filepath.Ext("..") is "." - non-empty - so an extension
check waves it through too, and a consumer joining it onto a directory
gets that directory's PARENT. The CLI builds its temp path exactly that
way.

Both ends fixed, deliberately independently. The server now rejects any
name that is only dots or carries a separator, checked on the trimmed
form so "..." and "./" do not each need a case. The CLI sanitises the
name it receives regardless: a client that builds a local path out of a
remote string should not depend on the remote end having sanitised it,
and this CLI talks to whatever instance it is pointed at.

Tested with "..", "...", "./" and "a/b", with an ordinary name as the
premise leg. Restoring the old narrow guard fails it.

## Two tables for one relationship

The CLI kept its own MIME-to-extension table and it had drifted: images
and video but not gzip, tar, XML, YAML, TOML, HTML, JavaScript or
several documents the server has always allowed. So the extension
fallback added in round 24 silently did nothing for exactly the types
whose viewers most depend on it.

The CLI now delegates to attachments.ExtensionForMIME, and the second
table is gone. Measured after: gzip .gz, tar .tar, html .html, js .js,
pdf .pdf.

The reverse map needs one choice per type where several extensions
share one, and those preferences are asserted to name types the forward
map actually uses - because the first version listed "text/yaml", which
this map does not use (it says application/yaml), so that preference
could never fire. Same class as the alphanumeric guard removed in the
previous commit, caught the same way.

Also recorded against myself: I destroyed both new functions mid-edit by
running git checkout on a file with uncommitted work, to "revert an
approach". That is a documented trap I have hit before and had written
down. The committed function survived; the uncommitted ones did not.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* test(server): make the body-reader scan scope-aware, wrong in both directions before (BUG-2803)

Codex round 26, finding 4. The scan used ONE flat name-set per top-level
function, which is wrong in both directions at once:

  - a function literal inside a handler was scanned with the OUTER
    function's request names, so an unrelated inner variable that
    happened to be called r was FALSELY flagged;
  - a request arriving only as a function literal's own parameter was
    INVISIBLE, because literals were never given names of their own.

A false flag in this test is not harmless. The only way to green is to
add the file to the accounted list, and an accounting entry HIDES every
future reader in that file - so a false positive here converts directly
into a blind spot later. That is the same trap that made me abandon the
broadened regex two commits ago.

Now walks a SCOPE at a time. Each scope inherits its parent's request
names, drops any it shadows with a parameter of a different type, and
adds its own. Local aliases (req := r) are picked up as well, since that
is an ordinary thing for a handler to do and the alias reads the same
body.

Three controls, run rather than argued:

  closure parameter reader   -> FLAGGED
  local alias reader         -> FLAGGED
  shadowed inner variable    -> not flagged

The first two were invisible to the previous scanner, which never gave
literals their own names, and the third is the false positive it
produced - both by reading the code this replaces.

Limits restated honestly rather than left as they were, since two of
them are now closed. Still invisible: a request in a struct field, one
from a context, and one whose type reaches http.Request through an alias
or embedded field. This matches the literal spelling rather than
resolving types; closing those means the type checker, not the parser.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* fix: stop the reverse MIME map emitting BLOCKED extensions, and close four instrument gaps (BUG-2803)

Codex round 27 returned "do not merge yet" with three P1s. All of them
are mine, from the previous two commits.

## The reverse map turned a refusal list into a source of extensions

extMIMEMap is the FORWARD table used to REFUSE uploads - it deliberately
lists .svg, .exe, .com so those extensions can be recognised and
rejected. Reversing it wholesale meant ExtensionForMIME("image/svg+xml")
answered ".svg", where the old CLI table answered nothing, and
 names a local file with that.

So I closed an SVG door two commits ago and reopened one through the
MIME helper. Blocked types now get no reverse mapping at all, and the
test asserts it with a premise leg (the map must CONTAIN a blocked type,
or the assertion never runs). Removing the exclusion fails naming .svg,
.com and .msi.

## The oracle was closer, not identical

Production descends only into a JSON DOCUMENT - a string whose trimmed
form starts with { or [. The oracle unmarshalled any valid JSON, so a
SCALAR under a listed key made it answer true where production answers
false. Closer to production is not a usable oracle; only identical is.
Aligned, and the scalar case is in the corpus.

## The scan was still not scope-aware, and could now MISS a reader

A nested block shared the enclosing name-set, so
{ r := &http.Response{}; r.Body.Read(nil) } was FALSELY flagged. And the
shadowing rule deleted a name rebound to http.Request BY VALUE - which
still shares the Body, since it is an interface holding the same reader
- so that read became invisible. Blocks are now their own scope and a
value request counts.

## The controls I claimed were not in the suite

Round 27 was right: I had run them as throwaway probes and deleted them,
so nothing held the scanner to them. The scanner is now a package-level
helper and TestBodyReaderScanDiscriminates drives it over ten synthetic
files - six that must be detected (plain, unconventional name, closure
parameter, alias, value copy, form reader) and four that must not
(no request, shadowed by a closure parameter, rebound in a nested block,
mentioned only in a comment).

## And an over-refusal of my own making

The filename guard rejected any dot-only name and anything containing a
separator. Only "." and ".." are path components; "..." is an ordinary
POSIX filename, and filepath.Base has already reduced "a/b" to "b", so
the separator test was dead on this platform and removed rather than
left looking load-bearing. Preservation controls now pin that
legitimate names survive.

Also removed: an unused id parameter on safeLocalFilename.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* test(server): only a DEFINE can rebind a name, and cover the idiomatic reassignment (BUG-2803)

Found by probing my own previous commit rather than by a review round -
the first time in this sequence I have caught the adjacent breakage
before the next round did.

The scope rules deleted a request name on ANY assignment whose right
side was not a request identifier. That is wrong in the dangerous
direction, and it fires on the most idiomatic line in Go HTTP code:

    r = r.WithContext(ctx)
    io.ReadAll(r.Body)      // <- invisible to the scan

WithContext is a call, so the name was dropped and every later read went
unseen. Measured before the fix: MISSED.

The correct rule is type-sound. Go is statically typed, so a plain
cannot change a variable's type: if it held a request before, it holds
one after. Only a DEFINE introduces a new binding that can be something
else. So the delete is now gated on token.DEFINE, which is both more
correct and simpler than what it replaces.

Three controls added, and the two that would have caught this are the
ones I had not written: a WithContext reassignment, and readers inside
an if body and a for body - the last two because making every nested
block its own scope is exactly the kind of change that could have
started missing them. Thirteen controls now, six negative.

Reverting to delete-on-any-assignment compiles and fails the
WithContext leg.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* fix: make the body-reader scan conservative by design, and reduce filenames cross-platform (BUG-2803)

Codex round 28. Two findings, and the first is the fifth consecutive
round to find a FALSE NEGATIVE in the same instrument.

## Stop modelling scopes; change the error direction instead

Rounds 24 through 28 each found another way the scope-modelling scan
missed a real reader: a value-copied request, a plain
r = r.WithContext(ctx), a mixed r, ok := ... that reuses an existing
variable, and if/for/switch initialisers and case clauses whose scopes
it did not model. Each fix closed one case and left another. That is a
design telling me something, not a run of bad luck.

The two error directions are not symmetric here. A false NEGATIVE hides
a body reader, which is the entire thing this test exists to prevent. A
false POSITIVE costs one human review and an accounting entry with a
reason attached. So the scanner now OVER-APPROXIMATES on purpose: any
name bound to an http.Request anywhere in the file counts for the whole
file, aliases are followed to a fixed point, and names are never
un-bound. Every scope-shaped false negative becomes structurally
impossible.

The cost is real and is now asserted rather than discovered: two
controls that previously expected "not flagged" - a name shadowed by a
closure parameter, and one rebound in a nested block - now assert
CONSERVATIVELY FLAGGED, so the bias is on the record. Three of round
28's named misses are added as controls and pass: mixed short
declaration, switch case, if-initialiser shadow. Sixteen controls, and
the accounting test still passes against the real package - so the
over-approximation costs nothing today.

Exactness needs go/types with a real package load, which is a bigger
instrument than this test warrants. The comment says so, and names the
signal that would justify building it: an accounted entry whose reason
is "the scan over-flagged".

## A filename safe on this OS is not safe on the consumer's

filepath.Base is platform-specific, so on Unix it leaves a backslash
alone - and the stored name is consumed cross-platform. A Windows client
joining a stored "..\evil.png" onto a directory traverses upward.

Reduced to the leaf under BOTH separator conventions. This normalises
rather than refuses, which is less lossy than replacing the whole name
and keeps round 27's point that a backslash is legitimate on Unix.
Removing the reduction compiles and fails the new test.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* test(server): count readers per accounted file, add two missing reader methods, correct a false reason (BUG-2803)

Codex round 29, and its central point was aimed at my REASONING, not my
code. It was right.

## The over-approximation argument was wrong for per-file accounting

I justified a deliberately conservative scanner by saying a false
positive costs one review and one accounting entry. That is not what it
costs. Once a file is listed, a NEW reader added to it is covered by the
existing entry and the test stays green - so a false positive does not
cost a review, it permanently blinds the list for that file. My own
comment already recorded that hazard two commits earlier, and I argued
past it anyway.

The fix is to make the entry carry a COUNT of reader expressions rather
than a yes/no. Adding a reader to an accounted file now changes the
number and fails, so the entry must be re-read and its reason
re-justified. It churns exactly when a body reader is added or removed,
which is when a human should look.

Demonstrated: inserting r.PostFormValue into handlers_tokens.go - an
already-accounted file - is FLAGGED. Before this it was absorbed
silently.

The conservative bias stays, because the false-negative classes it
eliminates are real and the count now removes the reason it was
expensive.

## Two real reader methods were missing

MultipartReader STREAMS the body and FormFile triggers multipart parsing
of it. Neither was in the selector list, and FormFile is used in
production in handlers_attachments.go - so the list was incomplete
against code that exists, not hypothetically.

## A reason in the list was simply false

handlers_tokens.go was accounted as "a nil/ContentLength check only - it
never reads the body". It guards on those and then calls decodeJSON. A
wrong reason is the same defect as a missing entry: both let a reader
pass as reviewed.

## And I guessed the counts

I wrote plausible numbers for the per-file counts and every one was
wrong; the test reported the real ones on its first run. Same habit this
branch keeps catching - a figure written from expectation reads exactly
like a figure that was counted. They are measured now and the comment
says so.

Also recorded: my first verification script failed to apply its mutation
and still printed a verdict, which I nearly banked. It now aborts unless
the mutation is present in the file.

Claude-Session: https://claude.ai/code/session_01AUvLoXsKdS5sdpYju6rj4p

* fix(attachments,cli): close the closing round's two view defects, correct two overclaiming comments (BUG-2803)

The closing enumeration (successor seat, per the lead's convergence ruling)
returned two real attachment-view defects and two comments claiming more than
their code delivers. Fixed here; the round's two design-scale findings are
filed instead (BUG-2820 scanner precision via go/types, BUG-2822
Windows-unstorable filename forms).

- Reverse MIME map: four ALLOWED spellings (text/xml, text/yaml,
  application/javascript, audio/webm) had no reverse extension because no
  extMIMEMap entry uses them as its value — `pad attachment view` wrote an
  extensionless temp file for exactly the types the delegation was built to
  fix. Population measured against the whole allowlist: these four, no more.
  An alias table closes them; TestEveryAllowedMIMEHasAnExtension asserts the
  class property over the allowlist (a future allowlist entry with no reverse
  extension fails), plus alias hygiene (allowed keys only, no forward-derived
  collisions, alias extensions must map to ALLOWED types so the table can
  never mint a refused extension). Mutation-verified: removing the alias
  application fails the test on all four types.

- safeLocalFilename: a trailing dot survived every check and
  filepath.Ext("photo.") is "." — non-empty — so the MIME-extension fallback
  never fired and the temp file dispatched on no extension. Trailing dots are
  now stripped (cannot empty the name; dots-only names already returned
  early). The CLI guard also gains its first direct tests, including the
  backslash and traversal refusals that previously rode untested.
  Mutation-verified: removing the TrimRight fails both trailing-dot cases.

- Two comment corrections, same defect class the accounting list itself
  names (a wrong reason reads as review): the handlers_cloud.go entry said
  bodyHasCloudSecret "restores" the body — it restores the first 64 KiB and
  drops the tail, a bound that file documents; and the accounting test's
  header said its scan "cannot be spelled around" while its own KNOWN LIMITS
  block lists the spellings that get around it (struct field, context value,
  type alias). The header now matches the limits block.

* fix(server,attachments,cli): close closing-round-2's scanner blind spot and four stale comments (BUG-2803)

Closing round 2 (successor seat) found no product defects; all four findings
were in instruments and comments. Each verified against the code, then fixed:

- The alias fixed-point resolved only identifier RHS (`req := r`), so a
  dereferenced copy (`c := *r; io.ReadAll(c.Body)`) was an invisible body
  reader — and unlike the disclosed type-level classes, this one was not in
  the KNOWN LIMITS block. The copy shares the Body (an interface holding the
  same reader). StarExpr operands now join the alias set; a new control pins
  the case. Mutation-verified: reverting the StarExpr handling fails the
  control. The type-level classes (struct field, context value, type alias)
  remain disclosed and are BUG-2820's territory.

- The KNOWN LIMITS block said shadowed request names are "correctly
  ignored" while the controls deliberately assert they are conservatively
  OVER-FLAGGED — stale prose from the scope-aware era, falsified by the
  round-28 conservative flip that never touched those lines.

- The reverse-map stability loop compared only PREFERRED entries across
  rebuilds; it now compares the entire map (sizes and every mapping) against
  the first build. Boundary stated honestly: every multi-spelling type today
  is preference-pinned, so the full-map comparison discriminates only when a
  future non-preferred multi-spelling entry appears — that future entry is
  what it guards.

- Three orphaned/wrong comments: a `mimeForExt` doc block glued above
  ExtensionForMIME (the function it described is gone); the old hardcoded
  extension-table doc glued above safeLocalFilename (falsified by the
  delegation it predates); and two "120 chars" claims where the cap is 120
  BYTES rune-safe via truncateBindableText — the consent form's
  maxlength=120 counts characters, so a multibyte name passes the client
  and is still truncated server-side, which is now what the comments say.

* fix(cli,server,docs): close the attachment-view path escape, and closing-round-3's instrument and prose findings (BUG-2803)

Closing round 3 found the branch's first product defect since round 17, in
BRANCH-ADJACENT code the round-24 fallback extension work made reachable: the
`pad attachment view` id fallback joined the RAW id onto its temp dir, and the
client sent the id into the URL path UNESCAPED. An id is a CLI argument, but
the documented agent flow harvests it from item content ("pad-attachment:"
refs other workspace members write), so a traversal-shaped "id" could
re-route the HEAD/GET to a different endpoint whose 200 then vouched for it,
and the write escaped the temp dir. Both halves fixed and both
mutation-verified through a new command-level test: reverting the fallback
sanitize demonstrably wrote OUTSIDE the sandboxed TMPDIR; reverting the
PathEscape put a raw "../../" on the recorded wire.

- internal/cli: url.PathEscape(attachmentID) at both id-bearing client sites
  (HeadAttachment, DownloadAttachment — the enumerated population).
- cmd/pad: the id fallback runs through safeLocalFilename, generic
  "attachment" when nothing survives; view's long help no longer claims the
  filename is used "without rewriting the extension" — it describes the
  reduction and the MIME-extension append, and says why the CLI is stricter
  than the server (the name is written to YOUR filesystem).
- cmd/pad: attachmentViewCmd gets its first command-level test (CONVE-19 —
  the helper tests vouched for the component, not its wiring): disposition
  name, extensionless+MIME append, id fallback, traversal containment with a
  wire-escaping control, generic fallback.

Instrument and prose findings, each verified before fixing:

- The KNOWN LIMITS disclosure now names the ordinary alias forms the
  fixed-point does not walk (var-spec, call-derived, named results, range
  bindings) — they were in BUG-2820's filing but not in the in-file
  disclosure, which is what let the round read them as unfiled. The scanner
  itself deliberately does NOT grow another parser patch; go/types is the
  filed fix.
- TestTextSafeHelpersAreUsedAtEveryCallSite pins EXACT occurrence counts
  (measured: 1 declaration + 4 call sites each) instead of a >=4 floor a
  removed call site could hide under.
- middleware_mcp_audit: two stacked comment copies rested non-forgeability
  on "real names do not begin with (" — the exact reasoning round 25
  retired; the const doc now points at auditLabel's namespace-reservation
  rule, which is what actually makes the marker non-forgeable.
- docs/backup.md said repair is needed before "the export or migration" goes
  through, contradicting its own "exports fine" three paragraphs up — it is
  the IMPORT or migration that fails; the export succeeds either way.

* fix(server,cli): decode chunked watch bodies, refuse dot-segment attachment ids, correct two texts (BUG-2803)

Closing round 4 found one PRE-EXISTING product defect and one residue of the
round-3 fix, plus two wrong texts. Each verified before fixing:

- Watch creation gated its body decode on `ContentLength > 0`, so a CHUNKED
  request (ContentLength == -1) had its body silently DROPPED — the caller's
  predicate ignored, an unconditional watch created, 200 returned. The
  population of ContentLength gates in the package is exactly two:
  handlers_tokens.go already used the `!= 0` form, watches now matches it,
  with io.EOF tolerated so the documented no-body-is-valid contract holds
  for an empty chunked body too. Three handler-level tests discriminate the
  cases; the mutation (condition back to `> 0`) fails the two it should and
  passes the empty-body control. The accounting instrument then flagged the
  new `r.Body != nil` reference in the file — its exact job — and the file
  is now accounted with a measured reader count of 1.

- url.PathEscape leaves exact "." and ".." UNCHANGED, so those two ids still
  reached the wire as live dot segments for a proxy or server to normalize —
  the escaping added in round 3 did not cover them. Both id-bearing client
  sites now share attachmentIDPathSegment, which refuses exactly those two
  values before any request (a real id is a UUID; the refusal cannot fire on
  one). Mutation-verified: removing the refusal fails the new subtest, which
  also asserts zero requests reach a recording stub.

- The artifact rejection text said "NUL byte"; the same refusal fires for a
  NUL manufactured by a YAML escape during parsing, where no raw NUL byte
  exists — now "NUL character", in the handler message and the error var.

- A test comment claimed the User-Agent reaches sessions.user_agent as
  text; sessions store only ua_hash, as the accounting list's own exemption
  states two hundred lines up. The sentence now agrees with it.

* fix(attachments,server): remove a can't-fire MIME preference and a stale filename-guard sentence (BUG-2803)

Closing round 5 is down to two P3 comment defects; both verified and fixed:

- preferredExtensions "preferred" .md over a .markdown that has never been
  in the forward map — a line that cannot fire, the exact class this
  branch's own instruments hunt (the alphanumeric guard, the text/yaml
  preference, the charset loop). Entry removed; shortest-wins picks .md as
  the only candidate, unchanged. The preference-hygiene test now asserts
  every entry has a real competitor (>= 2 forward-map spellings), and the
  counterfactual — re-adding the entry — fails it.

- The upload filename guard still carried round 26's "checking the trimmed
  form rather than listing spellings" sentence directly above round 27's
  code that does the opposite (exact "." / ".." comparisons, longer dot
  runs deliberately preserved). The stale layer is gone; the surviving
  paragraph already records why.

* fix(server,docs): drop a dead test fixture, stop claiming the failing row is named (BUG-2803)

Closing round 6 returned one P3 — TestDecodeJSONTrimsOnlyJSONWhitespace
booted a full testServer it never used (`_ = srv`), dressing a direct
decodeJSON test in router coverage it does not have. Removed.

Its enumeration also re-read docs/backup.md against the code: "the failing
row is named in the error" is true of neither leg — the import answers 400
naming the RULE it refused on (the NUL check is body-wide and knows no row),
and `pad db migrate-to-pg` reports which WORKSPACE's copy failed. The doc
now says exactly that, and that locating the value is manual until
BUG-2810's preflight lands.

* fix(server,cli): retire a stale byte-search claim, close two instrument gaps from closing round 7 (BUG-2803)

Round 7 found no production defects; three instrument/comment findings:

- artifactIsBindableText's doc comment still asserted the round-8 byte-search
  approach and that "the ambiguity cannot arise here" — directly above the
  round-9 body comment recording that assertion as simply wrong and doing the
  round-trip walk instead. The doc paragraph now describes the round trip
  and points at the body's history.

- TestBodyReaderScanDiscriminates listed MultipartReader and FormFile in the
  scanner's selector set but had no control for either, so their removal
  from that list was undetectable. Two controls added.

- The attachment-view test proved nothing about the MIME delegation: every
  case used image/png, which the OLD hand-rolled table also knew, so a stale
  local table passed. Two cases added — application/gzip (a type round 26
  found missing from that table) must gain .gz, and blocked image/svg+xml
  must gain nothing. Mutation-verified: a stale-table mutant that answers
  only for png fails the gzip case. (First mutant attempt didn't build —
  unused import — and was not counted as a detection.)

The per-file same-count substitution gap round 7 restated is declined as
filed, not fixed: BUG-2820's filing already specifies per-call-site
accounting via go/types as the fix that retires the per-file count
workaround; the KNOWN LIMITS closing line now carries that ref.

* fix(attachments,server): sweep two pre-BUG-2413 disposition comments, pin the manifest refusal to 400 (BUG-2803)

Closing round 8 found no production defects; two evidence findings, verified
then fixed:

- Two comments still described the PRE-BUG-2413 disposition policy: the
  RenderChip mode doc said the HTTP layer serves every chip inline, and the
  read-path doc derived Content-Disposition from RenderMode. The live policy
  is the explicit fail-closed ServeInline allowlist — most chip types are
  served as "attachment". Both now say so and record the history.

- TestImportBundle_RefusesNULInManifest accepted any status >= 400, so the
  documented 400 could decay into a 500 unnoticed. Pinned to
  http.StatusBadRequest.
2026-08-30 21:30:19 -04:00
xarmian e747a1610c feat(session): registry keyed on the harness session, carrying the agent name; pad session list / prune (TASK-2767) (#1200)
## Summary

TASK-2767 (IDEA-2750 part 2, with part 3 riding along — the keying fix and the reaping are one mechanism).

The local session registry (`~/.pad/sessions`) was keyed on the pid of the `pad session register` subprocess, which is dead before anyone reads the file. One session left a new file per call and its own pid appeared in none of them; the only live identifier was the harness pid a reader could parse out of the socket path's basename. In practice nothing wrote it (zero callers in `plugin/`, `skills/`, or hooks) and nothing read it.

Now:

- **One record per session, keyed on the harness session pid** — `$PAD_SESSION_PID` (harness-agnostic override), else `$CLAUDE_PID` (verified present in both the tool shell and a live plugin monitor's `/proc/<pid>/environ`), else the calling process. A set-but-invalid value is an error, not a silent fall-through.
- **The record carries the agent name** the session's writes are attributed to (`ResolveAgentName`: `.pad.toml agent_name` → `$PAD_AGENT` → detected runtime; `--agent` overrides, `--agent ""` is anonymous), the harness session id, and the messaging socket's identity (inode/device/mtime — the same binding the arm-state file uses).
- **One owner-identity type, one verdict.** `internal/cli/session_owner.go`: `SessionOwner` + tri-state `OwnerLiveness` (`alive` / `dead` / `unknown`). `armStateOwnerAlive` is now `OwnerLiveness(...) == alive` with its file contract preserved (socket identity else mtime; headless pid + start token; fail closed). The registry pruner takes the opposite posture on `unknown`: on Windows `pidAlive` reports dead for every pid, and a reaper built on that would delete every live session's record.
- **Verbs:** `pad session register [--agent]` (writes/refreshes; prunes dead records), `pad session list [--agent] [--cwd] [--all] [--format json]` (liveness per row, newest first; dead hidden unless `--all`), `pad session prune [--older-than DUR]` (dead always; unknown only under an explicit bound; alive never). Nothing on MCP — host-local filesystem state.
- **Who registers:** `plugin/scripts/pad-monitor.sh` runs `pad session register` on start, BEFORE the consent gate — presence is a fact, consent is a grant, and the record is local/0600/never on the wire.
- **Legacy v1 files** list as `legacy` rows: owner = socket-basename pid (else registrar pid), liveness by pid only (v1 recorded no socket identity, and the socket-without-identity rule would have judged every legacy record dead while its session ran). A legacy row can say a session exists, never who it is.

Lead rulings on the four open decisions, all as built: `agent`/`--agent` vocabulary; no server-presence merge in `list`; register from the monitor script before the gate; wire follow-on (agent name on the stream) filed separately as IDEA-2750 part 2b.

One ordering change from the plan's section A: pid precedence is `PAD_SESSION_PID` > `CLAUDE_PID` > self (explicit override beats detection, mirroring `PAD_AGENT` over runtime detection); the plan listed `CLAUDE_PID` first.

## Behaviour changes for existing users of `~/.pad/sessions` / `pad session register`

- Registry files are keyed on the **harness session pid** (`PAD_SESSION_PID` → `CLAUDE_PID` → self), not the `pad` command's pid; repeated registrations overwrite one record instead of accumulating.
- `pad session register` records the agent name, harness session id and socket identity; stores the **real path** of the cwd; prints a different text line and a different JSON shape (the full `SessionRecord`); and **rejects** an invalid `PAD_SESSION_PID` / `CLAUDE_PID` instead of silently keying on itself.
- Existing v1 files are read as `legacy` rows (owner = socket-basename pid, no agent name) and dead ones are pruned by the next register.
- The plugin monitor now registers (and prunes) on every start, before the consent gate.
- `armStateOwnerAlive` now delegates to the shared `OwnerLiveness`; the consent gate's observable behaviour is unchanged on every platform and key type (codex round 4 traced every caller; matrix M29 pins the socket-keyed mapping).

https://claude.ai/code/session_016zc6oxBvpax6Z3iQMsAJno
2026-08-25 15:31:16 -04:00
xarmian ea139272ce fix(server,watchevents): shared session presence + honest push acceptance (BUG-2698, BUG-2699) (#1175)
Two coupled defects in the push path, fixed as one unit because 2699's honest-acceptance signature is the substrate 2698's fix reports through.

BUG-2699 — Bus.Publish reports acceptance. The endpoint returned 200 pushed:true
for a publish that was dropped, because Publish returned nothing and swallowed
every failure. An error is two outcomes and they are kept apart: ErrBusClosed
proves nothing was published (503 unavailable, safe to resend), while any other
error means UNCONFIRMED — go-redis retries a command whose reply was lost, which
is why the publish script already carries a dedupe token — and gets 502
push_unconfirmed, deliberately off the web client's safe-to-resend list.
MemoryBus was the worse case, not the exempt one: neither implementation checked
`closed`, and the in-process one dropped silently with no log at all. Seven
production call sites, not the six the item named; the six best-effort producers
discard through one named helper, and an AST-based test fails when a new
producer publishes directly.

BUG-2698 — RedisSessionPresence. A session-targeted push was resolved against
the answering replica's presence registry, and the handler skips the publish
when the target is absent, so a POST landing on A for a session held on B
dropped the instruction and answered delivered_sessions:0. Fixed at the REGISTRY
rather than the gate: a shared registry makes the snapshot right, which makes
the picker complete and restores the gate's original premise, so the existing
skip becomes correct for the reason it was written. Entry and index are written
atomically under a TTL renewed by a goroutine that lives exactly as long as the
connection; a crashed process stops renewing and Redis clears it. Staleness is
unchanged and now stated in full: ~30s for a dropped client, ~90s for a dead
instance.

delivered_sessions becomes nullable — null means published-but-uncountable,
never zero — documented as three states at every consumer.

35 Codex review rounds. Notable: a per-user registry cap was added and then
removed after three consecutive rounds found defects inside it and a fourth was
asked whether it belonged in this PR at all; a context bound was documented,
disproved by its own test (go-redis does not apply a command context to
connection establishment — 5.0s measured against a 150ms ctx), and rewritten to
say what is true. Every fix was mutation-checked; one instrument was deleted for
passing on broken code and one for not asserting its own premise.

Filed rather than folded in: BUG-2724 (Redis keyspace namespacing + Cluster),
BUG-2725 (delivered_sessions is an estimate with error in both directions),
BUG-2726 (no concurrent-connection limit on the watch stream), BUG-2727 (Redis
absent from readiness/metrics; silent subscriber loss), BUG-2728 (epoch-reset
resume lead).

Gates: build · make lint 0 issues · go test ./... (25 pkgs) · svelte-check 0
errors · vitest 1738 passed · CI 7/7 including Go (PostgreSQL) and Nix.
2026-08-21 20:43:20 -04:00
David Barkhausen 5784d907c0 feat(cli): PAD_TOKEN environment override for stored credentials (#879) (#1160)
* feat(cli): PAD_TOKEN environment override for stored credentials (#879)

Layer 1 of #879: if PAD_TOKEN is set, the CLI uses it as the bearer
token and skips the credential-store lookup — gh's GH_TOKEN convention.
Reads never write credentials.json, so a read-only override sidesteps
the multi-agent identity contention completely; the store is never
touched under the override.

Per the acceptance grounding notes:

- NewClientFromURL resolves PAD_TOKEN before the per-server store
  lookup (the single token-attachment chokepoint).
- whoami no longer lies under the override: it skips the store
  short-circuit and reports the effective identity via a real /me
  fetch, with an 'Auth: PAD_TOKEN environment override' line.
- auth login/logout print a gh-style stderr notice when the override
  is active. logout additionally pins its server-side session
  invalidation to the STORED token — an unpinned Logout() after the
  constructor change would have invalidated the env token's session —
  and skips the server call when there is no stored session.
- pad init's status line and server info's report disclose the
  override (env_token_override field; the auth probe uses the token
  every other command would use).

Zero behaviour change when PAD_TOKEN is unset. Token minting stays
web-only; a minimal 'pad token' CLI is offered as a follow-up.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix(cli): review round 1 — init fails on a rejected PAD_TOKEN; login shortcut skipped under the override; logout asymmetry documented

Per the PR #1160 round-1 review:

- Bug 1: pad init's auth step no longer falls back to stored
  credentials when a set PAD_TOKEN is rejected — it fails with the
  distinct rejected-token message (mirroring whoami), which also makes
  the status line's override disclosure truthful. Test drives the real
  padInitCmd flow and asserts the stored identity is never consulted.
- Bug 2: login's 'Already logged in as <stored user>' shortcut is
  skipped when the override is active — it reads the store, and firing
  it right after envTokenNotice contradicted the notice. A second test
  pins the unchanged no-override shortcut behaviour.
- Doc ask: the deliberate logout asymmetry (the env token's own
  session is never invalidated; its lifecycle belongs to the minter,
  GH_TOKEN posture) is now stated in env_token.go's doc comment and
  the README PAD_TOKEN section.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
2026-08-20 07:54:13 -04:00
xarmian 449ac109e9 fix(server,mcp,cli): refuse system-metadata keys in fields_patch + retry-hostile error code (BUG-2627 part 2, BUG-2675) (#1166)
* fix(server,mcp,cli): refuse system-metadata keys in fields_patch + retry-hostile error code (BUG-2627 part 2, BUG-2675)

Part 2 of BUG-2627 closes the door that mints the defect parts 1 and 3
dealt with: `--field implementation_notes=<json>` stored the entries as a
JSON-ENCODED STRING, which is invisible to every reader and — since part
3's guard — disables `pad item note` on that item until the row is
repaired.

Refused SERVER-SIDE in `fields_patch`, not at the CLI as the item's scope
line proposed. The deviation is deliberate and recorded on the trail: the
CLI is one of three clients, and all three lower a user field-setter into
the same key (`pad item update --field` at cmd_item.go, the MCP `field`
param via dispatch_http_advanced.go on remote, and stdio by shelling out
to that CLI). One gate closes all three; a CLI-only refusal would have
left remote MCP writing the key. Both call sites were read, and the CLI's
lowering is now pinned by a test rather than left as an assumption.

Scope, stated because it is deliberate: this closes UPDATE only. The full
`fields` blob stays open because that door is SHARED — `pad item note` /
`decide` / `github link` send one, and so does convention activation via
BuildConventionItemFields -> ItemCreate. Closing it would break the system
writers the gate exists to protect. Item create therefore remains a mint
site, tracked with the rest of that surface in BUG-2685.

The refusal message is per-key: implementation_notes -> `pad item note`,
decision_log -> `pad item decide`, github_pr -> the GitHub link flow, and
`convention` refuses WITHOUT naming a command, because none writes it.
PATTE-135 wants a remedy that works in the failing state; a single
"use pad item note" line would have been wrong for three of the four keys.

BUG-2675 rides along on one ToolSurfaceVersion bump, as ruled. The append
refusal from part 3 reached MCP agents as `server_error` — not our fault,
and not transient, so agents could reasonably retry a failure that is
deterministic forever. New closed-set code `stored_state_unreadable`,
emitted on BOTH transports: HTTP classifies the sentinel error directly,
stdio via a `pad-structured-error/v1:` marker the CLI now writes for its
own local refusal (the first marker generated without an upstream
APIError). v0.16-then-v0.17 is what a one-transport fix costs.

Also here:
- items.ReservedOverrideKeys -> ReservedFieldKeysIn. The second caller
  passes a patch, not an override map, and the old doc comment said
  fields_patch was an open exposure — true until this commit.
- `Extract* returns nil for THREE reasons` -> FOUR. The comment listed
  four; the count was corrected everywhere except the code.
- Consumer-read artifacts updated where the claim is ACTED on, not only
  where it is documented: instructions.md (incl. a "do not retry this
  code" section), the catalog `field` param description, `pad item update
  --help`, README.

Gates: build · make lint · go test ./... · make test-pg · Codex.
Eleven-mutation matrix run against the new tests; every one killed by an
assertion (two were rewritten after killing by compile error / surviving,
which proves nothing).

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* fix(server,mcp): honest remedy when the stored value is already unreadable; name the MCP-facing code (Codex round 1)

Three findings from the pre-push review, all real:

P2 — the refusal named `pad item note` unconditionally, but on an item
whose stored value is ALREADY undecodable that command refuses too (part
3's guard). The caller was routed in a circle: field write refused -> run
the note -> refused -> back again. That is exactly the failure PATTE-135
exists to prevent, and my own trail had reasoned the remedy was safe on
the strength of the HEALTHY case only. The message now inspects the
item's stored value and, when the key is unparseable, says so and points
at the one action that works in that state (inspection), noting that the
repair needs a full `fields` write no CLI flag exposes.

P2 — two doc claims were false where an actor reads them. The catalog
said reserved keys are refused "on every action that accepts field",
which includes CREATE, and create is deliberately NOT gated; and both the
catalog and instructions.md named `validation_error` (the HTTP code)
where an MCP client actually receives `validation_failed`. Both corrected,
and the create exception is now stated rather than implied by omission —
an agent that reads only "refused on update" will otherwise assume create
is fine, which is how a hole gets used.

nit — the destructive-downstream sentence claimed every reserved key
becomes unreadable and trips an append guard. True only for the two
append-backed keys; github_pr and convention are simply overwritten. The
clause is now per-key, because a confident wrong explanation is worse
than a vague right one.

Two more mutations run against the new branch: always-readable (the
circular remedy returns) and never-readable (the working remedy
disappears) — both killed by assertions.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* fix(models,mcp,cli): one appendability predicate, per-key docs, stdio hint parity (Codex round 2)

Five findings, all real.

P2 — the message's readability check and the guard it describes were two
different decodes. Mine unmarshalled into []json.RawMessage; the guard
uses []ItemImplementationNote. A stored `[1]` passed mine and fails the
guard, so the message would again have prescribed a command that refuses
— the same circularity round 1 caught, through a narrower door. Replaced
with models.StructuredFieldIsAppendable, which ASKS the guard rather than
re-deriving it, plus an agreement test over 12 shapes x 2 keys that
compares the predicate against the real Append* helpers. Verified by
restoring the RawMessage version: the table catches it on `[1]`.

P2 — stdio lost the new code's hint. Remote MCP told the agent retrying
is pointless and how to inspect; stdio got the code with an empty hint,
because the CLI's marker envelope carried none and the classifier parsed
none. Both fixed, with the hint hoisted into paired constants (the same
duplication StructuredErrorMarker already uses) and the test comparing
the two TRANSPORTS' envelopes rather than either against a literal.

P2 — doc text was still false for `convention`: the catalog, the
instructions and `--help` all said reserved keys are maintained by
note/decide/the GitHub flow, which is true of three of the four. Each key
now names its own writer, and `convention` names library activation.
Also dropped the `malformed_override` advertisement — that is the
SERVER's code; an MCP client sees validation_failed for both refusals.

nit — the classification test called structuredAppendErrorResult
directly, so deleting either dispatcher call site left it green.
Added dispatcher-level tests driving the real server + store, asserting
the code, the hint, and that the item's stored fields are byte-identical
afterwards. Mutation-verified by reverting the note call site.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* fix(items,models,mcp): github_pr stays writable through fields_patch; no nil-map panic (Codex round 3)

P1 — the gate refused `github_pr`, and that was wrong. My model was
"system writers use the full fields blob, user setters use fields_patch",
which holds for three of the four reserved keys and fails for this one:
`pad github link` needs a local git checkout and the `gh` CLI, so it is
excluded from remote MCP BY NAME, and internal/mcp/dispatch_http.go's
noRemoteEquivalent map tells remote agents in so many words to use
`item update --field github_pr=...` instead. For that audience the patch
door is not a bypass of the writer — it IS the writer.

So the refusal deleted a documented capability from remote agents, and
answered with a message naming a command they cannot run: the same
circular remedy round 1 caught, aimed this time at the people the gate
was meant to help. items.PatchRefusedFieldKeysIn now exempts the key and
records the rule being applied — refuse a raw write where a real writer
exists — rather than the list it produces. Whether remote agents should
get a proper PR-link action, so the key can be closed too, is a product
question and is left as one.

P2 — the hint told agents to read the bad value with `pad_item action=get`.
They cannot: stripDuplicatedFieldsKeys removes implementation_notes and
decision_log from every MCP response's fields blob, and the top-level
arrays come from the extractor, which returns nil for exactly this shape.
The value is invisible on the whole surface. The hint now says so and
routes to a human, who can read it with `pad item show --format json`.

P2 — `fields` holding a literal `null` unmarshals into a NIL map with no
error, and both Append* helpers assign into what they get back, so
`pad item note` PANICKED ("assignment to entry in nil map") instead of
appending. Reproduced, fixed in parseMutableItemFields, and pinned by a
test that fails on a panic rather than taking the process down. An absent
blob and a null blob mean the same thing to every caller. Pre-existing,
but it sits in the function family this bug is about and the message was
about to recommend the command that panics.

nit — README claimed a "closed eight-code taxonomy" (17 codes, and I had
just added one) and read as if create lowers into fields_patch.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* fix(models,mcp): predicate matches the append on malformed blobs; stop promising a broken workaround (Codex round 4)

P1 — round 3 exempted `github_pr` from the update gate on the strength
of noRemoteEquivalent's documented workaround. That workaround does not
work: ingestFieldKVP (remote) and parseFieldFlag (CLI, and so stdio) both
store a `field` value as a STRING, so the PR data lands double-encoded
and no link appears — the BUG-2627 shape one key over. Filed as BUG-2696
with the three candidate fixes; NOT folded in, because the narrowest of
them changes how every field value is typed.

The exemption stands regardless: refusing would leave remote agents with
strictly less than a broken door. What changes is what we may PROMISE.
The catalog, instructions.md, version.go and README said "this is how you
link a PR"; they now say the door is open and broken, and to hand PR
linking to a human. Advertising a capability that isn't there is the
failure mode this whole unit keeps circling.

P2 — StructuredFieldIsAppendable returned TRUE when the whole fields blob
was unparseable, on the reasoning that a broken outer blob is a different
problem. True of the cause, irrelevant to the caller: the Append* helpers
bail on that same parse, so the message again named a command that fails.
It now returns false, which is simply the honest answer to the question
asked, and the agreement table grew a malformed-outer-blob leg — the gap
that let the disagreement through.

P2 — the message claimed a raw field write always stores something Pad
cannot read back. That holds for the CLI and MCP (a `--field` value is
typed by schema lookup and these keys are in no schema) but not for a
direct REST caller sending a valid array, who is refused for ownership
reasons alone. Reworded to say both parts.

nit — a misplaced parenthetical in the README read as if item CREATE
lowers into fields_patch. It does not; it sends the full blob.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* fix(mcp,models): stop the remote hint advertising the broken PR workaround; classify an unparseable blob as retry-hostile (Codex round 5)

P1 — I corrected four artifacts that pointed agents at the github_pr
field write and missed the fifth: noRemoteEquivalent's own text, which IS
the message a remote agent receives when it calls `github link`, and
which Codex had quoted at me in round 3 to establish the workaround
existed. The nearest artifact to the actor was the one I did not open.
Both entries now say there is no working remote path and name BUG-2696,
with a test pinning the negative so a future edit cannot quietly
reinstate the advice while the write is still broken.

P2 — a fields blob that will not parse at all produced a bare parse
error, so `note` / `decide` reached agents as `server_error`: transient-
looking, and therefore retried, for a failure that is as deterministic as
the per-key one BUG-2675 exists for. Both Append* helpers now wrap that
parse failure in ErrStructuredFieldUnreadable, which both transports
already classify, and the malformed-blob test asserts the sentinel rather
than just an error.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* docs(mcp,cli): qualify what an agent can actually see when the state is unreadable (Codex round 6 nit)

Round 5 widened stored_state_unreadable to cover a fields blob that
fails to parse outright, which made half of its own hint false: MCP's
normalization strips a broken structured KEY (so `get` hides it), but
leaves an unparseable BLOB as a raw string (so `get` shows it). The hint
and instructions.md asserted the first case for both.

Now stated per layer, in the two paired constants and the instructions.
The reason it is worth the words rather than being cut: an agent told
'you cannot see this' does not look, and would have missed a value that
was in fact right there in the response it already had.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* fix(mcp): classify the move/copy reserved-key refusal as validation on stdio too (Codex round 7)

P2 — carried over from v0.22, surfaced because THIS bump documents the
two reserved-key refusals as agreeing across transports. The move/copy
message ("Field(s) reserved for system metadata and not settable here")
matched none of the stdio validation patterns, so the same deterministic
400 arrived as validation_failed on remote and server_error on stdio —
and server_error reads as transient, so an agent retries a refusal that
can never pass. One pattern added, plus a test that drives both real
classifiers with the real server message text for both refusals, so a
reworded message that stops matching fails here rather than in the field.

nit — the github_pr exemption is UPDATE-only; move and copy still refuse
it, because there the argument is BUG-2674's (an override reintroduces
the key the migration just dropped), not this one's. The catalog and
instructions said "not refused" without that qualifier.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* fix(mcp): cover the copy path's own refusal wording in the stdio classifier (Codex round 8)

P2 — round 7 fixed the MOVE wording; the copy path words the same class
of refusal differently ("Destination collection has no field(s): ..."),
so it kept arriving as server_error on stdio and validation_failed on
remote. Third message in one family, and the round-7 test used the move
text for every case, which is why it missed this.

The parity table now carries all three real messages plus a control leg
using one the pattern list already covered — without it the table could
pass by matching everything.

Recorded in the pattern list's comment rather than left implicit:
matching prose is a stopgap, the structural fix is the
pad-structured-error/v1 marker that carries the code instead of inferring
it, and until a refusal emits one, this test is where a new wording has
to be added.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* test(mcp): use the real upstream codes in the parity fixtures (Codex round 9 nit)

The copy legs carried `validation_error` where the handlers actually
emit `malformed_override` and `invalid_override`. The 400 branch ignores
the body code today, so the test passed either way — which is exactly why
the fixture mattered: it was quietly recording a wrong contract, and a
future code-aware classifier would regress against a table that agrees
with it.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* docs(mcp): the upstream code is not forwarded to MCP clients (Codex round 10 nit)

The catalog said the server's own code (validation_error /
malformed_override) appears in the MCP message. It does not: the 400
branch emits code=validation_failed with a fixed "Validation failed."
message and the server's text in the HINT, discarding the finer-grained
code. Reworded to say what an agent actually receives, and to say that
telling the two refusals apart means reading the message.

Also carried the update-only qualifier on the github_pr exemption into
the README, matching the catalog and instructions.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* docs(items): state the exemption predicate, not the exemption list (lead ruling)

The lead's ruling on the github_pr reversal: make the REASON what the code
says, so the next key added to reserved metadata is evaluated against
'does this audience have a real writer?' rather than pattern-matched onto
a list that happened to be wrong for one key.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V
2026-08-19 23:17:24 -04:00
xarmian bc68b84848 fix(cli,mcp): send raw collection slug so an alias can't shadow a real collection (BUG-2630) (#1162)
* fix(cli,mcp): send raw collection slug so an alias can't shadow a real collection (BUG-2630)

The client-side alias map (collections.NormalizeSlug) rewrote seven hardcoded
singulars ("task", "plan", …) to their plurals BEFORE the request. In a
workspace whose collection slug IS one of those singulars, the user's exact
name was rewritten away and their create/list/move landed in a DIFFERENT
collection — silently, with a success message naming the wrong one.

Fix, per lead ruling on the BUG-2630 trail, split by transport:

CLI (real HTTP, may hit a pre-resolver server) — Option 2, one shared helper
cli.WithCollectionAliasFallback: send the RAW slug first (the server's
exact-match-first resolver from BUG-2578 wins, so an exact name is never
shadowed), and retry with the alias ONLY on a collection-not-found error, only
when the alias differs. Keying on collection-not-found is load-bearing: a
request to a collection that exists but fails for another reason is never
retried into the alias (that would recreate the bug). Both the schema fetch and
the create funnel through the helper so typed --field values parse against — and
the item lands in — one collection. On a genuine double-miss the error names the
RAW slug the user typed (collection "widget" not found), not the alias.

MCP remote transport (in-process ServeHTTP against the SAME binary, which always
carries the resolver — no version skew) — drop client-side normalization
entirely and send raw. Also removed the dormant expandPath collection
normalization: no routeSpec uses a {collection}/{target_collection} path
placeholder, so the branch was dead code in the area this fixes.

Search is deliberately out of scope (filed BUG-2659): its collection is a global
c.slug=? FILTER, not a path — a miss returns 200 + zero results, not
collection-not-found, so the retry can't key on it; and handleSearch is
cross-workspace, so the per-workspace resolver has no single workspace to run
against. Cross-workspace copy is excluded too (DR-13 forbids auto-retrying the
copy mutation).

Verified live against a real server: create/list/move into a singular collection
that collides with its plural now land in the named singular; shorthand still
resolves; genuine misses error naming the raw slug. New MCP integration test
reproduces the original shadow (item → PLANS-1) when normalization is restored.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* fix(server,cli): own collection resolution server-side + capability-gate the CLI retry (BUG-2630 Codex r1)

Addresses all three Codex round-1 findings, via the lead's ruling that
dissolves the earlier "retry vs archived-protection" tension by making the
server the sole owner of resolution semantics.

Finding #2 (MCP lost the legacy abbreviations t/i/p/d and phase/phases -> plans,
which the server's ±s resolver did not cover): fold the legacy alias map into
collectionSlugCandidates as a LAST-resort candidate. Exact-match-first and the
archived-claims refusal run for the input and every structural candidate before
the alias is reached, so it never shadows or redirects around a real/archived
collection. Now every client can send the raw slug — including the MCP transport
that can't retry — and lose nothing.

Finding #1 (the client retry re-opened the archived/hidden redirect the server
deliberately refused, because not_found can't be told from absent): add a
collection_resolution capability flag to GET /server/capabilities and gate the
CLI retry on it. Happy path unchanged (raw slug, one request). On
collection-not-found ONLY, the client probes capabilities once (cached): if the
server advertises resolution, its not-found is authoritative — the slug is
absent, archived, or hidden — so the client does NOT retry. Only an older server
that lacks the flag (or 404s the endpoint) triggers the legacy alias retry,
which is non-regressive there since old servers never had the protection. The
probe fails safe toward retry. This makes the follow-up distinct-error-code bug
unnecessary.

Finding #3 (double-fail masked a substantive alias error as "collection not
found"): the helper now surfaces a substantive alias-attempt error verbatim, and
only collapses to the raw-named not-found when the alias ALSO 404s.

Verified live against a resolving server: create/list/move into a singular that
collides with its plural land in the named singular; the abbreviation `i`
resolves to `ideas`; and after archiving `plan`, `create plan` honestly fails
("collection \"plan\" not found") instead of being retried into a live `plans`.
Gates: make lint 0 issues; go test ./... green; make test-pg green.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* fix(cli): fail-closed capability probe + always-retry the schema lookup (BUG-2630 Codex r2)

P1: the capability probe cached ANY failure as "no resolver", so a single
transient blip (timeout/5xx) permanently re-enabled the alias retry and could
bypass the archived/hidden protection on a resolving server. Now the probe
distinguishes a DEFINITIVE verdict (HTTP 200 with the flag, or a clean 404 =
legacy build) from an INDETERMINATE one (transport error / 5xx): only definitive
verdicts are cached, and an indeterminate probe fails CLOSED (trusts the
not-found, no retry) without caching, so the next call re-probes. A genuine old
server still returns a clean 404, so its retry is unaffected. Renamed the
predicate to CollectionNotFoundIsAuthoritative to name what it actually decides.

P2: the create schema lookup hits exact-match-only GetCollection, which does NOT
resolve slugs server-side, so capability-gating it made `create task
--field amount=3` 404 the schema fetch, skip the retry, and send amount as the
string "3". The schema lookup now always retries the alias (nil gate),
restoring typed-field parsing against an aliased collection's schema. Best-effort
as before: a genuine miss still degrades to string fields.

New client test covers the probe: definitive verdicts cache (one probe), and a
transient failure fails closed AND re-probes on the next call (mutation-verified).

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* docs(cli): note fail-closed-on-indeterminate as a deliberate safety asymmetry (BUG-2630)

Per lead review: make explicit in CollectionNotFoundIsAuthoritative's doc that
failing closed on an indeterminate capability probe is deliberate — a recoverable
alias-shorthand miss is the safer side of the trade vs a retry doing an
un-undoable wrong-write. Comment-only.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V
2026-08-19 08:13:29 -04:00
xarmian e40df6b31c feat(cli): pad session arm/disarm/status + consent config resolution (PLAN-2613 S2, TASK-2617) (#1149)
* feat(cli): pad session arm/disarm/status + consent config resolution (PLAN-2613 S2, TASK-2617)

The S2 CLI contract S3's plugin skills and S4's web composer build against.
S1 gated push delivery on a server-side armed bit declared at stream
connect; nothing decided WHETHER to arm or sent the declaration. S2 adds
both, defaulting off everywhere.

- ResolveAutoArm (internal/cli/arm_consent.go): pure consent resolver.
  .pad.toml [push] auto_arm is the only per-repo enabler (D4); a per-user
  config auto_arm=false vetoes it (deny-wins); default off. Config
  surfaces: PadToml.Push.AutoArm + config.Config.Push.AutoArm (*bool,
  unset != false), both nil-safe.
- Wire contract: StreamSessionIdentity.Armed sends ?armed=true on the
  event stream — S1's server gate finally has a sender. The monitor
  announces armed = live local arm OR resolved auto_arm, so a repo
  opt-in works end to end with a safe default-off skew.
- Verbs pad session arm/disarm/status: arm/disarm manage a per-session
  local arm-state file; status reports the resolved local/auto decision
  plus the server's own armed/connected counts (new Client.ListSessions),
  degrading gracefully when padd is unreachable.
- Arm-state file (session_arm_state.go): keyed per session by
  CLAUDE_CODE_MESSAGING_SOCKET (cwd fallback for headless, secondary to
  auto_arm). Mandatory liveness — a dead-owner file (socket vanished /
  pid gone) reads as disarmed and is reaped, so a crashed session can
  never arm a future monitor. Local client state only; the server's
  armed bit stays the sole delivery authority.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* fix(cli): address Codex R1 on push-consent (fail-closed config, owner-identity liveness)

- HIGH-1: user config.toml read now fails CLOSED. config.LoadPushConfigAutoArm
  reads the [push] auto_arm value strictly — absent → no opinion, but
  present-but-unparseable → error — and ResolveAutoArmFromDisk refuses to
  auto-arm when it can't confirm the user's veto (was: swallowed by the
  lenient config.Load and treated as no-opinion).
- HIGH-2: arm-state liveness now checks owner IDENTITY, not just presence.
  Socket-keyed files record the socket's mtime and require an exact match,
  so a reused socket path can't revive a stale file. Headless files record
  a Linux /proc start-time token (portable fallback documented) to reject a
  reused pid.
- MED-1: arm-state writes are atomic (temp + rename) and reaping is
  non-destructive (re-checks staleness before removing) — a concurrent
  re-arm is never clobbered.
- MED-2: pad session status applies the .pad.toml URL override, so it
  queries the same server the monitor connects to.
- LOW: malformed arm-state files are now reaped (safe now that writes are
  atomic — a corrupt file can't be a torn in-progress write).

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V

* fix(cli): address Codex R2 on push-consent (atomic config write, stronger owner identity)

- HIGH-1: Config.Save() is now atomic (temp + rename), so a monitor
  reconnecting while `pad configure` rewrites config.toml can't read a
  truncated/partial file, miss a [push] auto_arm=false veto, and arm.
- finding 2: socket owner identity now uses inode+device (unix) as the
  primary signal, with mtime as the non-unix fallback — a rebound socket
  or a lingering stale node at the same path gets a new inode and is
  rejected, closing the mtime-collision / reused-node gaps.
- finding 3: headless liveness fails closed when a proc-start token was
  recorded but can't be re-verified (was: fell back to bare pid-liveness,
  which a reused pid passes); zombies (state 'Z') now report not-alive.
- finding 5: `pad session status` applies an explicit --url override too,
  not just the .pad.toml one.
- finding 4 (connect-time TOCTOU): documented as an accepted, bounded
  residual — a disarm racing an in-flight connect is corrected on the next
  reconnect; fully closing it needs S3's server-side disarm-on-open signal.

Claude-Session: https://claude.ai/code/session_017jD6t1zjxGSq47SQpZfp1V
2026-08-17 22:44:31 -04:00
xarmian 625cab9984 fix: bound item history and stop resolving bodies nobody reads (BUG-2608) (#1147)
* fix: bound item history and stop resolving bodies nobody reads (BUG-2608)

Item history was unbounded on every surface, and summary mode paid for what it
discarded: the endpoint resolved EVERY version by walking the item's whole
reverse-patch chain, and both the CLI and the MCP dispatcher then projected
that away to metadata. An item edited under collab records a version every few
seconds while someone types, so this is routinely hundreds of full-content
reconstructions per history call, for output that shows none of them.

Two independent fixes, because they address different costs.

SUMMARY SKIPS THE WALK. `?summary=true` returns metadata from the raw rows and
never resolves a patch. That is the dominant win: the resolution was pure waste
for every caller except --full. Content and is_diff are cleared TOGETHER — an
empty body still claiming to be a reverse patch would tell a consumer to
resolve something that is not there.

LIMIT BOUNDS THE WINDOW, newest-first. That direction is not a preference: with
reverse patches, reconstructing any version means walking back from current
content, so a newest-end window is the cheap prefix of that walk while an older
one still pays for everything above it. That is also why there is deliberately
no offset — it would advertise a pagination whose later pages cost the same as
no bound at all.

Absent limit stays UNBOUNDED on the endpoint, following the item-list
precedent (maxItemListQueryLimit: "a zero/absent limit is left unbounded — this
only clamps an explicit oversized request"). The defaults live on the CLIENTS,
where a token budget is actually known: `pad item history` defaults to 50 with
--limit to change it, and the MCP catalog action injects 50 (max 300, the same
pair list and backlinks already use). A server that truncates a request nobody
bounded is a silent-truncation trap for third-party API consumers.

The MCP default goes in the CATALOG action rather than either dispatcher, so it
reaches BOTH transports — HTTP reads it off the input, and stdio receives it as
the CLI's new --limit through BuildCLIArgs. ToolSurfaceVersion 0.20 -> 0.21
with a changelog entry, plus instructions.md and README, per the 2304-family
contract discipline. Additive param bump: `limit` already existed, nothing
changed shape, and a v0.20 consumer that sends no limit now gets the newest 50
instead of all — which is the fix, not a break in it.

The restore and single-version-expand paths still resolve the FULL chain, and a
test pins that: bounding their walk would strand exactly the old versions those
paths exist to reach.

Eight mutations, each failing only the leg it targets. Three fixture problems
surfaced that way and are worth naming, because each made a test that could not
fail:
  - force_version in a PATCH body does nothing (`json:"-"` on ItemUpdate), so
    the throttle collapsed six edits into one version; varying the source per
    edit is what actually records them.
  - an 8-byte body is cheaper stored whole than as a patch, so no version was
    ever is_diff=true and the is_diff assertion was inert. The fixture now uses
    a body large enough that the store really stores patches.
  - the cmdhelp test fixture lacked the new --limit flag, so BuildCLIArgs
    silently dropped it. Verified against the REAL cmdhelp tree that the flag
    is present and typed int, so the fixture mirrors the CLI rather than
    flattering it.

* docs: bring CLAUDE.md to v0.21 and name why the two result caps differ (BUG-2608)

Codex round 1, both findings.

CLAUDE.md still described the MCP surface as v0.20 — stale because of my own
bump, in the document every agent working this repo reads first. README and
instructions.md are held to the version by a test; CLAUDE.md is not, which is
exactly why it drifts.

The cap "mismatch" (MCP max 300, endpoint clamp 500) is deliberate layering,
not an oversight — item lists have the identical split (300 in the catalog,
1000 at the endpoint) because the two answer different questions: an agent
token budget is only knowable in the catalog, while the endpoint's clamp is a
server-resource ceiling on what any caller may ask for. But nothing said so
anywhere, so a reader comparing the two numbers had no way to tell design from
accident — which is precisely the report Codex filed. Now stated at the
constant and in CLAUDE.md, including why the versions ceiling is LOWER than the
list one (resolving a version can cost a patch application per row, not just a
row read) and why an absent limit is left unbounded at the endpoint.

* fix+test: honest truncation notice, armed fixtures, and the residual named (BUG-2608)

Codex round 2, both findings, and the second is the more useful one.

CLI TRUNCATION NOTICE was wrong in both directions: it compared the response
length against the requested limit, so an item with exactly N versions was
reported as truncated, and a --limit above the server's ceiling was clamped
there and reported as complete. It now asks for ONE MORE row than it shows and
reports truncation only when that extra row comes back. The one case this still
cannot detect — an ask above the server's own ceiling, where the probe row is
clamped away with everything else — is stated in the code rather than papered
over by hardcoding the server's constant in the CLI.

UNDER-ARMED FIXTURES. The unbounded test seeded 5 versions, so a server quietly
defaulting to 50 would have passed the assertion that denies exactly that; it
now seeds 60. The clamp test seeded 2 and could not observe a clamp at all;
the clamp is now asserted directly against a parseItemVersionsLimit function
extracted for the purpose, over the inputs a URL can really carry (absent, 0,
negative, unparseable, either side of the ceiling).

That extraction replaced my own first attempt, which was worse than no test: it
re-implemented the clamp arithmetic in the test body and asserted the result
against itself. It could not have failed.

THE RESIDUAL, NAMED RATHER THAN IMPLIED. Codex's sharpest point is that the
summary tests cannot detect "resolve everything, then clear the fields" —
verified by mutation: pointing the summary branch at the resolving reader
leaves every handler test green, because the response is byte-identical either
way. So the performance claim does not rest on them. It rests on the handler's
summary branch calling ListItemVersionsPage (one reviewable line) plus a new
store test proving that reader really returns unresolved rows rather than
quietly resolving them — mutation-verified from the other side by making the
resolver a passthrough. The test file says all of this, including that an
end-to-end assertion would need a patch-application counter in the production
path, and why that is not worth it when the cost of being wrong is performance
rather than correctness.

* fix(cli): don't resolve for table output, guard the probe overflow, finish the CLAUDE.md bump (BUG-2608)

Codex round 3, four findings.

--full was treated as "content needed" regardless of output format, but the
table path prints no bodies at any setting — so `pad item history --full`
without --format json made the server walk the entire patch chain to build
content the CLI then dropped. That is the exact waste this bug is about,
reintroduced through the flag meant to opt into it. Content is now resolved
only when it will actually be shown.

The limit+1 probe overflowed at MaxInt: it wrapped negative, the client omitted
the parameter, and a request the user bounded came back unbounded — the
opposite of the ask. Guarded.

The truncation notice's documented blind spot was understated: it is AT the
server ceiling as well as above it, since the probe row is clamped away with
everything else. Wording corrected rather than resolved — the CLI still does
not duplicate the server's constant, because a copied ceiling goes stale
silently and asking for hundreds of versions is already opting out of a bound.

Two more CLAUDE.md sites still called v0.19 current; I fixed only the first on
the previous pass. That document describes the contract in three places and I
updated one, which is its own small lesson about grepping for every instance of
a claim rather than the first.

Live-verified against a real server: --limit 2 truncates and says so, --limit 4
on a 4-version item says nothing (the false positive Codex found), --limit 0
returns everything, --full --format json carries bodies, and the default JSON
shape carries metadata only.

* fix(server): clamp an out-of-range limit instead of treating it as unbounded (BUG-2608)

Codex round 4. `?limit=9223372036854775808` made strconv.Atoi return ErrRange,
which my parser lumped in with 'unparseable' and mapped to 0 — unbounded. So an
absurdly large number defeated the very ceiling the function exists to impose,
which is worse than no clamp at all: the bound looked enforced and was not.

Atoi hands back the saturated value alongside ErrRange, so a range-positive
input is now clamped to the ceiling — it is an oversized ASK, not a malformed
one. Range-negative still falls through to unbounded, matching a plain
negative.

Regression cases cover both overflow directions, and the mutation that
reinstates the old behaviour fails on the exact input.

This is the input-domain lesson again: I enumerated absent, zero, negative and
non-numeric, and stopped at what a person would plausibly type rather than at
what the TYPE admits.

* docs(cli): say in --help that a large --limit is capped server-side (BUG-2608)

Codex round 6, and the third time this ceiling came up — which is the tell that
the disposition was in the wrong place. I had documented it twice in CODE
comments, where the person affected never looks. `--help` says what the flag
does, and it said 'show only the newest N versions (0 = all)', which is false
for an N above the server's cap.

Now stated in both the flag help and the command's long description, including
that the truncation notice cannot detect that case and that --limit 0 is the
way to ask for a complete history.

Deliberately not naming the number: a constant duplicated into help text goes
stale silently, and 'capped server-side' is the part a user needs in order to
act. Behaviour unchanged — this is the artifact catching up with it, which is
the same correction the BUG-2301 sentinel comment and the instructions.md
overclaim both came down to.

* test: seed versions through the store so the fixture stops tripping the rate limiter (BUG-2608)

CI caught this and it is my defect, not a flake. Arming the unbounded test
above the plausible default meant seeding 60 versions, and the fixture did that
with 60 HTTP PATCHes in a burst — which trips the server's rate limiter. It
passed locally and in the Go job and failed under Nix, which is the signature
of a test that was always going to fail intermittently rather than one that
broke.

Seeding now goes through the store. That is not a weakening: versions are
recorded by the store on either path, and the endpoint under test is the READ
side, so seeding underneath the transport costs the assertions nothing while
removing a burst the server is entitled to refuse.

The three things that make this fixture work are now stated where someone would
otherwise undo them by accident — the large body (a small one is stored whole,
so no version is ever is_diff and every diff assertion goes vacuous), the
rotating source (the throttle collapses same-(actor, source) bursts into one
version), and the store-not-HTTP seeding with the rate-limit reason attached.

Re-verified after the change: the fixture still records more than 50 versions
and still produces reverse-patch rows, and the default-cap mutation now uses
the REALISTIC default of 50 rather than the 3 I first tested with — the old
5-version fixture could only have caught an implausibly small cap.
2026-08-17 19:02:53 -04:00
xarmian c84cf7437c feat(sessions): announce session identity on the event stream (PLAN-2558 S2, TASK-2560) (#1094)
* feat(sessions): announce session identity on the event stream (TASK-2560)

PLAN-2558 S2. S1 gave the presence registry a count of anonymous
uuids; this makes each row nameable, which is what S3 needs for an
honest empty state and S5 needs for a target picker.

A monitor now announces itself when it opens the stream:
X-Pad-Session-Label (the working directory's basename) and
X-Pad-Session-Pid. The server sanitizes both and stores them on the
LiveSession; GET /api/v1/sessions returns them.

TRANSPORT. The task body sketched "the stream connect carries it"
without picking a mechanism and explicitly left the call open. Headers,
because a query param would put the label and pid into every access-log
line (this server logs path= for each request) and any proxy log in
front of it — which is the same "don't let local detail travel further
than it needs to" the privacy line below is about — and a separate
registration POST would need its own correlation to the connection it
describes, plus a matching lifecycle, when the registry entry already
lives and dies with the stream. Headers ride the request that exists
and sit alongside Last-Event-ID, already doing this job on this
endpoint. Cost, written into the code rather than discovered later: a
browser EventSource cannot set headers, so a future web-tab consumer
needs a deliberate query-param fallback or a fetch-based SSE reader.

PRIVACY. The basename crosses, never the full cwd — "/home/dave/Dev/
docapp" additionally hands over a home directory and usually an account
name for no gain — and messaging_socket_path never leaves the machine.
Pinned by a test rather than by the implementation being one line.

WHAT THIS DELIBERATELY DOESN'T DO: read ~/.pad/sessions/. The task
framed S2 as giving `pad session register` its first consumer, and the
monitor cannot honestly be one. Registry entries are written by
whatever process ran that command — a different pid — and the only
matchable fields are pid and cwd, so two agent sessions in one checkout
are indistinguishable and "pick the newest" is a coin flip that would
put a confident wrong name in the S5 picker. Process ancestry settles
it exactly and is platform-specific (this binary ships for macOS and
Windows). The monitor's own cwd basename and pid are never wrong and
answer the question the label exists to answer; correlating a stream to
the agent session that spawned it needs an identifier the harness
passes down, which is worth doing when something needs it and worth not
faking until then.

Also moves S1's STALENESS doc block, which sat above LiveSession.Label
where it read as documenting the name rather than the whole entry.

Tests: sanitizer units (whitespace collapse, control-char stripping,
rune-not-byte truncation), header wiring, the end-to-end labelled
session, the unannounced-client compatibility leg (a pre-S2 monitor
must still register and still stream), a hostile-input leg over the
wire, the client's omit-when-unset behaviour, and the basename promise.

Measured rather than assumed: Go's server answers 400 to a header value
containing a control byte before any handler runs (verified with a raw
socket, since Go's own client refuses to send one and the two refusals
are indistinguishable from a normal client test). So that arm of the
sanitizer is unreachable over HTTP; it stays as defence in depth for
the next caller in, and both the comment and the wire test say so
instead of the test quietly passing because the transport refused the
input.

Mutation-tested four ways, each revert grep-verified: handler ignoring
the parsed identity, monitor sending the full cwd, dropping the
truncation, and the client always setting the headers.

Refs TASK-2560, PLAN-2558

* fix(cli): sanitize the session label client-side per Codex review (round 1)

Codex round 1's only finding, and it is a bigger deal than a missing
label. Unix directory names may contain control bytes — "doc\napp" is a
legal directory — and Go's http.Client REFUSES to send a request whose
header value holds one: Do returns "invalid header field value" and
nothing is transmitted. In the monitor that is indistinguishable from
an unreachable padd, so the retry loop backs off and tries again,
forever, printing nothing by contract. A user who named a directory
that way would simply stop receiving notifications, with no signal
anywhere. The server cannot defend against a request that never
arrives.

Reproduced before fixing, with a real directory and a real client,
rather than reasoned about from the error message.

Sanitizing in NewWatchEventsStreamRequest rather than in
monitorSessionIdentity: the invariant is "this function never builds an
unsendable request", which belongs at the point where a value becomes a
header, not at one caller. The client's cap (256 runes) is deliberately
looser than and independent of the server's (64): the server decides
what a label should look like, the client only has to keep the request
sane, and neither has to track the other to stay correct.

The regression test does the ROUND TRIP instead of inspecting the
header, because the header contents were never the bug — http.Header.Set
stores anything, so an assertion on the value passes against the broken
version too. Only attempting the request tells the two apart.
Mutation-verified: reverting the sanitizer fails the test with exactly
the "invalid header field value" error from the field report.
2026-08-14 19:03:33 -04:00
xarmian da6ce642da feat(push): pad push — user-authored instruction dispatch to agent sessions (IDEA-2544 Phase 1) (#1090)
* feat(push): add pad push <ref> -m vertical (IDEA-2544 Phase 1)

Self-addressed, human-to-harness dispatch over the existing watch-events
bus/stream: CLI -> POST .../items/{itemSlug}/push -> a new KindPush
Notification (carrying the generalized TargetUserID addressed-to field
KindAsk will later share) -> watchNotificationVisible delivers it back
to the pushing user's own connected monitor sessions. Transient,
fire-and-forget by design (no migration, no durable inbox) since
assignment already covers the durable-notification case and this is
meant to be the explicit, no-inference dispatch verb instead.

* docs(plugin): document the push notification contract (IDEA-2544 Phase 1)

Push is the one notification kind that IS an instruction rather than a
passive fact, so it gets its own lead bullet in the plugin skill's
notification-etiquette section (ahead of the read-only/park default,
which it explicitly lifts) and a mention in the monitor's description.
The embed-source skills/pad/SKILL.md has no notification section to
mirror this into (the two files diverge by design) and is left
untouched.

* fix(push): reject over-long push messages instead of unbounded Summary

Comments truncate their notification Summary to a preview (the full
body is still fetchable), but a push message IS the payload — silently
truncating it would corrupt the instruction with nothing to recover it
from. Add maxPushMessageLen (4096, measured post-collapse) and reject
anything over it with a 400 rather than truncating; state the same
bound in `pad push --help` so it's discoverable before a 400, not only
from one.

* fix(push): close the watch-fallthrough leak, disambiguate SKILL.md exceptions

Codex round 1 P1: watchNotificationVisible's push branch only returned
early on a MATCH — a non-target caller fell through to the watch-map
check below it, so anyone holding an unconditional (or predicated)
watch on the item received every push addressed to every OTHER user,
instruction text included. Push is addressed private dispatch, not an
item-level fact watchers have a legitimate claim on (unlike assignment,
which watchers are expected to see per `pad watch --help`) — the branch
now returns unconditionally for KindPush, gating strictly on
TargetUserID and never reaching the watch-map fallback either way.
Pinned explicitly since Phase 4's session targeting is expected to
inherit this same exclusivity.

Also (codex P2): reworded the SKILL.md notification-etiquette bullets —
the new push exception and the pre-existing assignment/ask exception
literally contradicted each other ("the ONE narrow exception" claimed
singularity after push had already claimed exception status). Now
explicitly enumerated as the first and second exceptions to the
never-write rule.

* test(cli): pin that PushItem inherits X-Pad-Agent (BUG-2542 rebase)

Verified, not assumed: PushItem builds its request via c.post ->
c.newRequest like every other mutating client method (CreateWatch
included), so the attribution fix's client.agentName wiring covers it
for free with zero code changes needed on this branch. Adds a live
httptest assertion rather than trusting the code-path read alone —
the same shape as TestClientSendsResolvedAgentHeader, scoped to
PushItem specifically since that's the one method this PR added.

* fix(push): disambiguate workspace in the monitor line and skill contract

Codex round 2 P1: the watch-events stream is user-scoped ACROSS every
workspace a caller has watches in, but formatMonitorLine printed only
ItemRef/Kind/Actor/Summary and dropped the Workspace field the wire
payload already carried — a session linked to workspace A receiving a
notification for workspace B would resolve the wrong item (or 404) with
no signal in the line that anything was off.

Fixed universally, not push-only: grepped plugin/ and skills/ for
anything parsing "PAD ..." lines and found none — the Claude Code
plugin host ingests the stdout line as free-text notification prose,
formatMonitorLine's only real consumer is its own fmt.Println, so there
is no wire-format consumer a workspace prefix could break. The
ambiguity predates push (any watched item across workspaces already had
it); push just makes the consequence sharper because it carries an
instruction rather than a passive fact.

SKILL.md's push bullet now tells the agent to resolve with
`pad --workspace <workspace> item show <ref>` using the slug read off
the notification line, not a bare `pad item show <ref>`.

* fix(push): respect --format json instead of hardcoding plain text

Codex round 2 P2: pushCmd's RunE ignored the global format flag and
always printed "Pushed <ref>", silently discarding --format json.

- server.pushResponse replaces the bare map the handler wrote before —
  a typed {ref, workspace, pushed, message} shape, with workspace
  resolved to the CANONICAL slug via s.getWorkspace (not merely echoed
  from whatever the URL contained), matching the same disambiguation
  need the round-2 P1 fix addressed for the monitor line.
- cli.PushItem now returns (*PushResult, error) instead of discarding
  the response body.
- pushCmd checks formatFlag == "json" and calls cli.PrintJSON, mirroring
  runCreateWatch's existing pattern.

internal/cli/agent_identity_test.go's TestPushItemSendsResolvedAgentHeader
needed a one-line update for PushItem's new two-value return — caught by
`go vet ./...`, not `go build ./...` (which doesn't compile test files);
folding vet into my own pre-flight going forward.
2026-08-13 18:41:46 -04:00