fix: close PI-140 cutover gaps

Back up unknown legacy Agents, reconnect settled Conversation observation, remove remaining active repository residue, and restore the bundled Python verifier import.

.project-docs/30-worklog/tasks/20260824-pi-remove-opencode-a41c9e72.md

@@ -8,7 +8,7 @@
 - Worktree: D:\Datas\OthersProjects\makelore-pi-remove-opencode-a41c9e72
 - Base commit: 61fede2b4dfed3e29a6c4e37aee73896713979e1
 - Owner: codex-root
-- Status: Implementation Complete; Planner Review Pending
+- Status: Needs Fix Addressed; Planner Re-review Pending
 
 ## Scope
 
@@ -77,9 +77,17 @@
   bundle/smoke scripts, dependencies, and obsolete tests were removed.
 - Retained only the migration-owned schema-v1 normalizer and expected generated
   Agent comparison in `electron/coding-projects/legacy-v1.ts`. Migration keeps
-  exact-delete/backup/rollback/notice behavior, valid schema-v2 projects bypass
-  legacy reads, unrelated `.opencode` content remains inert, and no `.pi/agents`
-  directory is introduced.
+  exact-delete/backup/rollback/notice behavior: it enumerates the legacy Agent
+  directory, removes exact generated files, and moves modified plus unknown Agent
+  files into the timestamped backup. Valid schema-v2 projects bypass legacy reads,
+  unrelated `.opencode` content remains inert, and no `.pi/agents` directory is
+  introduced.
+- Preserved the existing session-observation product behavior at the
+  vendor-neutral boundary. A live ordinary prompt that reaches the authoritative
+  completed settlement queues the final Coding Conversation Snapshot using the
+  project id and product Conversation id; hydrate/reconnect snapshots,
+  steer/follow-up, failed/aborted turns, and replies without assistant natural
+  language do not enqueue.
 - Preserved compatibility identifiers `app.niancode.desktop`, `niancode`, and
   the persisted electron-store name `opencode-projects`. The remaining source
   references to OpenCode are categorized compatibility/history boundaries:
@@ -99,6 +107,10 @@
   for its Provider protocol adapters. They are part of Pi's Provider package,
   not the removed OpenCode runtime/package/plugin/fallback, and remain covered by
   the explicitly accepted real-Provider qualification risk.
+- Removed the unreferenced legacy session run machine and old `.gitignore`
+  exception, updated current repository guidance and the session-observation
+  integration guide to Coding/Pi, and restored the `node:path` import required by
+  the bundled-Python verifier.
 
 ## Verification
 
@@ -108,13 +120,19 @@
   noise remains.
 - `pnpm run typecheck`: passed, including after the pinned-pnpm dependency rebuild.
 - `pnpm exec eslint . --quiet`: passed.
-- Full unit suite: 174 files passed; 1491 tests passed, 2 skipped (1493 total).
+- Full unit suite after planner fixes: 174 files passed; 1495 tests passed,
+  2 skipped (1497 total).
 - Pressure suite: 1 file and 1 test passed.
-- Focused migration/resource suite: 2 files and 9 tests passed, including the
-  valid-v2 no-legacy-read/no-generated-Agent-delete case.
+- Focused post-review suite: 3 files and 33 tests passed for migration,
+  session-observation sync, and Conversation store settlement behavior. It covers
+  valid-v2 no-legacy-read, unknown/modified Agent backup, live ordinary-prompt
+  settlement, no hydrate/follow-up replay, and assistant-natural-language gating.
 - Electron E2E: 3 tests passed for first Pi conversation latency/submit ordering,
   Pi product UI, and bundled Skill project configuration.
 - `pnpm run build:vite`: passed (Renderer, Electron Main, Preload, and utility).
+- `node scripts/verify-bundled-python.mjs --root resources/python/win32-x64
+  --target win32-x64`: passed for Python 3.12.13 and stdlib after restoring the
+  required `node:path` import.
 - Windows Pi bundle: passed with 130 production packages and 6 runtime assets.
 - Staged Pi probe: local sessions, shell, abort, and concurrency passed; decision
   intentionally remained `partial-pass` / `incomplete` because real Provider
@@ -128,10 +146,18 @@
 - Product-package Pi probe: local surface passed; cold p95 638 ms and warm p95
   626 ms. Decision intentionally remained `partial-pass` / `incomplete` because
   the Provider matrix has `realTurnVerified: false`.
-- Zero-residue scans passed for source/package metadata, `/api/opencode`, Windows
-  artifact paths, ASAR package names, and old runtime resource roots. The scan
-  separately categorized the upstream Pi Provider adapter filenames described
-  in Outcome rather than treating their text as a legacy runtime residue.
+- Repository-wide zero-residue scan has no unclassified hit. Production hits are
+  limited to migration paths, persisted compatibility identifiers, packaging
+  exclusion, and the one-time notice; tests contain migration fixtures and
+  negative assertions; old task/evidence records remain history. Canonical
+  project-memory descriptions are explicitly listed below for PI-160 promotion,
+  as required by feature-worktree ownership. The Windows artifact/ASAR scan also
+  separately categorizes the upstream Pi Provider adapter filenames described in
+  Outcome rather than treating their text as a legacy runtime residue.
+- Planner review of `61fede2..5a275b9` returned Standards/Spec Needs Fix for four
+  P1s: unknown Agent backup, silently disconnected session observation, repo-wide
+  residue, and the Python verifier import. The current post-review changes address
+  all four and await incremental planner re-review.
 - `git diff --check`: passed; only the repository's existing LF-to-CRLF warnings
   were emitted.
 - macOS x64/arm64 validation was explicitly skipped and is not reported as Pass.