Extends the convention + playbook library HTTP layer to support the shape
the upcoming `pad_library` MCP tool and the updated `pad library` CLI need:
- `GET /api/v1/convention-library?category=X` — server-side filter,
case-sensitive exact match. Unknown categories return an empty slice,
not 404.
- `GET /api/v1/playbook-library?category=X&summary=true` — same filter
plus a new summary mode that strips Content and injects Summary
(first non-heading paragraph, ~240 char cap). Web UI and existing
consumers omit the flag and see the legacy full-body shape. Summary
mode deep-copies category slices so a request never mutates the
package-level library data — TestPlaybookLibrary_SummaryDoesNotMutate
Global pins this.
- `GET /api/v1/library/entry?title=X` — NEW. Returns one matched entry
in a `{type, convention|playbook}` envelope. Conventions-first
precedence mirrors the dispatcher's `library activate` so a title
resolves to the same kind in both surfaces. 400 on missing title,
404 on no match.
Hoisted `playbookSummary` to `collections.PlaybookSummary` so the
bootstrap handler and the new library endpoints share one algorithm.
Bootstrap continues to call it for every playbook entry it returns.
Adds 12 handler tests + the existing bootstrap-summary test stays
green after the move. Lint clean on touched packages; `make check`
gate is blocked by a pre-existing gofmt issue in
internal/store/workspace_members.go captured as BUG-1565.
Parent: PLAN-1560. Unblocks TASK-1562 (CLI) and TASK-1563 (MCP catalog).
xarmian
2df6edeaab