docs: baseline t0 final acceptance

docs/CODEX_HANDOFF.md

@@ -2,8 +2,9 @@
 
 ## Current checkpoint
 
-T0-3 Documentation, Wiki & Roadmap consolidation is complete through D7. The next checkpoint is
-the separately authorized Baseline T0 final acceptance and closure. Baseline T0 is not yet complete.
+**Baseline T0 is complete.** T0-1, T0-2, T0-3.0, and T0-3 have passed their accepted closure
+criteria. Resume evidence-driven Mosaic product development from the canonical roadmap; do not
+reopen completed infrastructure programs without new concrete evidence.
 
 Current repository identity is exactly `constbogdan/Mosaic`; upstream remains
 `damontecres/Wholphin`. Work begins from current protected `origin/main` on a purpose-specific
@@ -30,10 +31,10 @@ not current instruction.
 
 ## Immediate continuity
 
-- Do not declare Baseline T0 complete until its independent final acceptance is explicitly
-  performed and authorized.
 - Public guidance is versioned in the repository. Optional Wiki publication remains a separate
   operator action and cannot replace engineering authority.
+- Existing upstream Draft PR #58 is an expected authenticated human-review waiting state. Do not
+  close, merge, rewrite, or classify it as a platform failure merely to make the queue empty.
 
 ## Non-obvious invariants and negative knowledge
 
@@ -78,12 +79,18 @@ rather than silently publishing a rewritten snapshot.
 
 ## Open risks and questions
 
-- Baseline T0 still requires its independent final acceptance and closure decision.
-- External GitHub settings remain manually administered; documentation may describe them, but no
-  configuration doctor or scheduled drift monitor is justified without repeated evidence.
-- Android TV visual/focus/device behavior is not fully proven by hosted compilation and JVM tests.
-- Cross-repository tooling standardization remains evidence-driven; do not copy Mosaic-specific
-  Gradle, PowerShell, branch, artifact, or release assumptions into another repository.
+- **External/manual responsibility:** GitHub settings remain manually administered. Baseline
+  closure reverified the current ruleset, merge settings, Environments, Actions defaults, Sync Bot
+  credential names, and repository identity; no configuration doctor or scheduled monitor is
+  justified without repeated drift evidence.
+- **Known non-blocking limitation:** Android TV visual/focus/device behavior is not fully proven by
+  hosted compilation and JVM tests; future UI changes still require proportionate device checks.
+- **Future work:** Cross-repository tooling standardization remains evidence-driven. Do not copy
+  Mosaic-specific Gradle, PowerShell, branch, artifact, or release assumptions into another
+  repository.
+- **Future product work:** Watchlist, collections/franchises, Discover, suggestions, next-season
+  automation, quality upgrades, playback improvements, and optional integrations remain roadmap
+  work rather than baseline infrastructure debt.
 
 ## Handoff maintenance
 

docs/MOSAIC_ROADMAP.md

@@ -10,14 +10,31 @@ the [documentation index](README.md).
 - T0-2 bounded authority/bootstrap/diagnostic corrections — complete.
 - T0-3.0 Mosaic identity establishment — complete.
 - T0-3 Documentation, Wiki & Roadmap consolidation — complete through D7.
+- **Baseline T0 — complete.** The final acceptance found no unresolved baseline blocker.
 
-Baseline T0 remains open until its independent final acceptance is performed and authorized.
-Completing T0-3 does not itself declare Baseline T0 complete.
+Baseline closure confirms the current engineering foundation; it does not imply that Mosaic's
+product feature roadmap is complete.
 
 ## Current priorities
 
-1. Perform the separately authorized Baseline T0 final acceptance and closure.
-2. Resume evidence-driven product work from the feature roadmap below after that decision.
+1. Resume evidence-driven Mosaic product development from the feature roadmap below.
+2. Keep infrastructure and cross-repository work demand-driven rather than reopening completed T0
+   programs without new evidence.
+
+## Baseline T0 closure
+
+The final acceptance confirmed T0-1, T0-2, T0-3.0, and T0-3 remain complete and coherent. Current
+operation retains PR-only integration, authoritative hosted validation, exact-tree protected-main
+reuse, independent Development eligibility, isolated signing, exact-byte Stable promotion,
+Hold-plus-forward-fix recovery, Mosaic-only downstream authentication, and human authority over
+upstream REVIEW/conflict Drafts.
+
+Live read-only verification at closure found the protected repository settings, required
+`Full validation`, Environments, configured Sync Bot credential names, and merge-commit-only model
+intact. Recent PR/main CI and scheduled upstream operation were green. Existing upstream Draft PR
+#58 is an authenticated human-review waiting state under the accepted model, not a baseline defect.
+External settings remain manually administered; future UI/device validation, Wiki publication,
+cross-repository standardization, and the feature backlog are non-blocking future responsibilities.
 
 ## Product direction
 

docs/T0_3_DOCUMENTATION_CONSOLIDATION_PLAN.md

@@ -4,8 +4,8 @@ Status: **T0-3 Documentation, Wiki & Roadmap consolidation — COMPLETE. D1-D7 c
 
 This audit describes the documentation set at `main` commit
 `44564901cbdb7ffce4b1c0704aa2d53f93c40fa9`. It does not move, delete, rename, or broadly rewrite
-existing documents. T0-3 is now complete; Baseline T0 remains open and its final acceptance requires
-separate review and authorization.
+existing documents. T0-3 is complete. Baseline T0 was subsequently closed by its separate,
+explicitly authorized final acceptance.
 
 ## Principles
 
@@ -410,5 +410,5 @@ tests, changed-scope pre-commit, whitespace validation, and Fast validation pass
 Wiki, changes no operating contract, and performs no historical restructuring.
 
 All T0-3 completion criteria below are satisfied. **T0-3 Documentation, Wiki & Roadmap
-consolidation is COMPLETE.** Baseline T0 remains open; its independent final acceptance and closure
-is the next checkpoint and is not authorized or performed by D7.
+consolidation is COMPLETE.** At D7 closure, Baseline T0 remained open and its independent final
+acceptance had not yet been performed; that separately authorized checkpoint subsequently closed it.