docs(phase2): coverage gate, migration TODOs, session handoff

- add tools/check_coverage.py and .audit/coverage ledger (schema + settings pilot)
- add coverage gap worklist and source-doc migration TODOs
- add session handoff; redirect stale resume points in AGENTS.md, docs/README.md, reconciliation record
- add rows: CAPTURE-41, CAPTURE-141, METADATA-66, PUBLISH-31, SETTINGS-51

.audit/2026-09-18-reconciliation-decisions.md

@@ -10,14 +10,11 @@ context is not lost between sessions. Loose ends are collected in section 16.
 
 ## 0. Resume here (for a new session)
 
-- Repo: `D:\dev\SlabUploader`. Branch: `docs/clean-main` (pushed to origin).
-- State: `main` fast-forwarded to `d754cac` (all shipped code); old specs preserved behind tag `pre-simplification`; Phase 1 scaffold committed as `b42e3cb`; reconciled requirement set drafted as `238fcc4` (128 rows, 8 namespaces).
-- Immediate next step: Ty reviews `docs/REQUIREMENTS.md` (Gitea branch `docs/clean-main`) and lists rewrite problems by requirement ID; the next session folds corrections in.
-- After that: migrate capability and contract docs into `docs/capabilities/` and `docs/contracts/`, make them branch-neutral, and have them cite IDs instead of restating requirements.
-- Gate that must stay green: `python tools/check_requirements.py`.
-- Read first: `docs/STRUCTURE.md` (contract and namespaces), `docs/REQUIREMENTS.md`, `docs/MILESTONES.md`.
-- Old-spec source: `git show pre-simplification:docs/<FILE>.md`. Raw extractions: `C:\Users\Ty\AppData\Local\Temp\opencode\slab-inventory\`.
-- Deferred rulings: section 18.
+**SUPERSEDED 2026-09-18. Read `.audit/2026-09-18-session-handoff.md` instead.**
+
+This section is kept only so the history below still reads correctly. The current state,
+locked rulings, gate output, and next steps all live in the handoff. Everything below this
+point is the decision log from the original reconciliation, not the current resume point.
 
 ## 1. Why this exists