Complete rollback verification after removing unstable Workspace V2 communication changes - PR_26128_004-final-rollback-verification

Author: DavidQ

docs/dev/reports/final_rollback_verification.md

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+# PR_26128_004 Final Rollback Verification
+
+## Baseline State
+- Verified the working tree was clean before this verification report was added.
+- Verified `main` and `origin/main` were aligned at `902875f3`, the `PR_26128_003-continue-yesterday-rollback` commit.
+- Verified no sample JSON or roadmap files had local changes.
+
+## Rollback Checks
+- Confirmed Preview Generator V2 no longer contains workspace direct-write runtime code for `/__workspace-manager-v2/write-preview`.
+- Confirmed Workspace Manager V2 no longer gates Preview Generator V2 launch status on direct-write `repoPath` readiness.
+- Confirmed the Playwright repo server no longer exposes the removed private direct-write endpoint.
+- Confirmed unstable shared repo-handle/tool-communication identifiers are absent from active Workspace V2 / Preview Generator V2 runtime surfaces.
+- Remaining direct-write endpoint strings are negative assertions in Workspace Manager V2 Playwright coverage only.
+
+## Preserved Items
+- Session Inspector remains present as tracked first-class tool files under `tools/session-inspector/**`.
+- Session Inspector remains registered in `tools/toolRegistry.js` and platform shell tool lists.
+- Workspace Manager V2 accordion behavior remains covered by `tests/playwright/tools/WorkspaceManagerV2.spec.mjs`.
+- Targeted launch validation confirmed Workspace Manager V2 and Session Inspector accordion toggles still open and close.
+- Rename/move cleanup and cosmetic/layout-only shell changes remain intact; this verification did not modify those runtime surfaces.
+
+## Validation
+- `npm run test:workspace-v2` -> PASS, 10 tests.
+- Targeted Workspace Manager V2 launch validation -> PASS.
+- Targeted Preview Generator V2 launch validation -> PASS.
+- Targeted Session Inspector launch validation -> PASS.
+- Removed endpoint probes -> PASS:
+  - `/__workspace-manager-v2/write-preview` returned 404.
+  - `/__preview-generator-v2/write-preview` returned 404.
+  - `/__repo/status` returned 404.
+  - `/__repo/games` returned 404.
+
+## Skipped
+- Full samples smoke test was skipped by request. This verification covers the rollback-specific Workspace V2, Preview Generator V2, Session Inspector, accordion, and removed-endpoint surfaces without re-running unrelated sample launch coverage.