Task: Integrate consultation scope diagnosis

Identity

Merge client diagnosis 3779f33 into local main and record the paired Yuxi correction. No client product or test changes.

Concurrent and Planning Gates Passed. Official start/status match Identity and exclusive integration ownership. Loaded entry, own/source/review records, required canonical context and all current peer Scope/Intent/Promotion records (55 Yuxi / 130 client). Reused unchanged standards and context at the exact source base commits. Historical placeholder scopes have no concrete merge dependency.
User authorized this local main-branch merge and explicitly approved handing off Yuxi's completed 20260926-merge-teacher-read-yx-d814f812 registration. The previously authorized five foreign documents remain adopted, unchanged and excluded from commits. Source records remain read-only; no new agents, push, deployment, installation or deletion.
Observer implementation touches the same service but is not merged; preserve both changes at its later integration. Peer 20260928-agent-single-chat-27da516b now records implementation approval, but has not promoted or merged a new cross-project conversation contract. This repair aligns the current supported client; no choice between future implementations is made here.
Plan: import exact reviewed source/review commits, verify ancestry and equality outside canonical integration notes, update accepted current-state/architecture pointers, pass task documentation and whitespace checks, commit and complete. Reuse passed tests when the product tree is identical.

Fast-forwarded local main to diagnosis 3779f33 without conflicts. No client product/test changes. Paired Yuxi fix e96d8cf and review cdeae44 are now included in local master.
Recorded the diagnostic result and paired server correction under Integrated Through. Existing accepted client ADR/business rules already define this contract and needed no rewrite.
All five adopted foreign documents across the two primary directories remain unchanged and excluded from commits. No push, deployment, installation or cleanup performed.

Conflict-free merge, source ancestry, exact product/source-record preservation, git diff --check and official task-aware documentation gates passed. The latter also verifies the adopted foreign documents retain their original content/index states.
Client tests/build not rerun: this integration changes diagnostic/canonical memory only. Reviewed Yuxi source passed 2260 non-slow unit cases (1 skipped), 10 real HTTP/PG/checkpoint/native-worker cases, engineering/docs checks and fresh independent review. No client behavior change or production acceptance claimed.

Deploy the merged Yuxi API when authorized; no SQL, client code update or history deletion is required by this fix. Existing failed questions are not automatically replayed.
The integrated source worktrees are retained pending the bounded cleanup offer: Yuxi 20260928-consultation-scope-yx-1d836a72 and reviewer 20260928-consultation-scope-review-c7e4a91b; client diagnosis 20260928-consultation-scope-83fa19c2. Cleanup is separate from merge and does not block delivery.
Preserve this project-topic correction when later combining the adjacent observer implementation. The separately approved single-conversation implementation must reconcile its new contract in its own integration.

No new client contract; diagnostic result recorded in current-state while existing project-level topic/per-question source rules remain authoritative for this integrated client.