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* feat(materialize): recover unsaved editor sessions into items.content in the background (TASK-2198 U4) Wires the U3 supervisor in. A collab room reclaimed at the end of its grace TTL with content-bearing rows above the flush watermark (T3), or a dormant pending item found by a one-minute sweep (T1), is queued; one worker goroutine materializes the item's whole content-bearing op-log with the whole-workspace link index and lands it through store.MaterializeFlush, under the collab item lock with no room open. The write is a flush: cursor == MAX(op-log id), rows pending, no set-aside rows, checked in the write's own transaction; watermark to the cursor only; seq bumped; one version row attributed to system/recovery; the op-log is never pruned. PAD_MATERIALIZE=off disables it entirely. A per-item in-memory failure budget (3 failures, doubling backoff, reset by a new op-log row) keeps untrusted input from being retried in a loop. Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC * test(store): recovery watermark is the cursor, not MAX at UPDATE time (TASK-2198 U4) Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC * test(store): a second recovery still writes its own version row (TASK-2198 U4) Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC * docs(mcp): op-log recovery bounds the stale-body window; tool surface v0.60 (TASK-2198 U4) content_state applied_pending_flush now clears on its own after the item's room closes, unless recovery fails or PAD_MATERIALIZE=off. Every sentence that called the window unbounded, or said nothing server-side moves op-log content into items.content, is corrected (CLAUDE.md, instructions.md, README, docs/deployment.md, docs/backup.md, code comments). BEHAVIOR bump to 0.60; goldens regenerated. Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC * fix(materialize): count ErrNoMemoryCap silently against the per-item budget (TASK-2198 U4) U3 now refuses every job with ErrNoMemoryCap when no memory cap can be established, and warns once itself. The recovery worker counts it like any failure but logs it at debug, not per item. Its log lines go through a logger seam so the test can tell. Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC * style: gofmt (TASK-2198 U4) Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC * feat(materialize): one log line per budget exhaustion; count set-aside skips on the sweep line (TASK-2198 U4) An item that uses up its failure budget logs exactly one WARN naming the item, the failure count and the last error kind (DEBUG when the kind is no_memory_cap, which the supervisor already warned about once), and logs again only after op-log growth resets the budget and it is exhausted anew. The schema-version skip goes through the same line. Items skipped for set-aside rows are counted and reported on a new single sweep summary line, written only when it has news; never per item. Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC * fix(materialize): keyset-page the recovery sweep so no candidate starves (TASK-2198 U4, codex r1) The sweep read the oldest 200 candidates from the start every tick, and the room check and the failure budget filtered them afterwards. Once 200 sat in backoff or exhausted, every sweep returned the same 200 and the 201st was never queued: filtering above a bound is starvation. Each tick now reads one page strictly after an in-memory keyset cursor (newest op-log created_at, item id) and wraps to the start after a short page, so every candidate is offered within ceil(N/limit)+1 ticks, whatever sorts ahead of it. Keyset over NOT IN: no parameter-count limit, and it also covers the room check, which an exclusion list would not. Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC * test(materialize): the sweep cursor wraps; docs for the exhaustion line, the set-aside count and paging (TASK-2198 U4) Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC * docs(deployment): reflow the recovery budget paragraph (TASK-2198 U4) Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC * test(materialize): recovery strips the follows-title marker as a tab's save does (TASK-2198 U4, BUG-3315) Since #1688 a tab loads a link that follows its target's title with the follows-title marker in the link's title attribute, so the marker lives in Y.Docs that recovery replays. Three fixture cases (a follows-title link; the same link after a rename; a URL edited to an external address) are generated from documents that really hold the marker, and the existing 8 are unchanged. A new leg recovers each through the production path (whole-workspace index) and through the runner with a restricted and an empty index, and asserts no 'pad-follows-title' reaches the body. It goes red in all 7 ways when the bundle's marker strips are disabled. Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC * test(store): a recovery version row carries #1691's history data (TASK-2198 U4) Rebased onto PLAN-2348 U2 (#1691), which adds user_id, line counts and a create marker to version rows. Recovery writes its row through the same UpdateItem insert, so it gets them automatically: no user_id (a system row), not a create, and line counts equal to diff.LineCounts of the stale and recovered bodies. The leg pins that. Claude-Session: https://claude.ai/code/session_01H63zaWhkb5pAafx2WGjrVC