Online upgrades can strand users on stale desktop UI state or malformed local persistence. This adds a deny-by-default Doctor path that resets only regenerable desktop UI state, reports protected local files with redacted metadata, and keeps protected repair as a dry-run no-op until a reviewed backup-first flow exists.
Constraint: Chat transcripts, model/provider config, Skills, MCP, IM bindings, adapter sessions, OAuth tokens, plugins, and team/session records are user-owned protected state.
Rejected: Automatically rewrite malformed protected JSON | unsafe without schema-specific migrations and backups.
Rejected: Continue relying only on startup migrations | users need an explicit recovery action after a white screen.
Confidence: high
Scope-risk: moderate
Directive: Keep Doctor repair deny-by-default; do not mutate protected state without an explicit reviewed backup-first manual repair flow.
Tested: bun test src/server/__tests__/doctor-service.test.ts
Tested: cd desktop && bun run test src/components/ErrorBoundary.test.tsx src/lib/doctorRepair.test.ts src/__tests__/diagnosticsSettings.test.tsx src/components/layout/StartupErrorView.test.tsx
Tested: cd desktop && bun run lint
Tested: bun run check:server
Tested: bun run verify (failed only existing agent-utils coverage baseline; changed-lines coverage 97.62%)
Not-tested: Packaged desktop manual Doctor click path.
Diagnostics exports previously preserved only compact summaries, which made user-uploaded issue bundles hard to debug. This records richer sanitized details from server, CLI, SDK, browser, React, and desktop API failure paths while keeping request bodies and secrets out of client-side reports.
Constraint: Diagnostic bundles must be useful for GitHub issues without including chat contents, file contents, full environments, or API keys.
Rejected: Only expand the Settings UI summary | the exported bundle would still miss hidden runtime failures.
Confidence: high
Scope-risk: moderate
Directive: Keep diagnostics write paths best-effort and non-blocking; do not add request-body capture without a redaction review.
Tested: bun test src/server/__tests__/diagnostics-service.test.ts src/server/__tests__/conversation-service.test.ts
Tested: cd desktop && bun run test src/api/client.test.ts src/__tests__/diagnosticsSettings.test.tsx --run
Tested: bun run check:server
Tested: bun run check:desktop
Tested: agent-browser E2E on ports 37652/41752 captured client_unhandled_rejection and exported a redacted tar.gz bundle
