- [lucide-react icon name collisions](lucide-icon-name-collisions.md) — `Badge`/`Activity` from lucide collide with shadcn/ui Badge and React 19 Activity; import Badge from ui, Activity from lucide.
- [OpenAI gpt-5 temperature](openai-temperature-gpt5.md) — gpt-5* reject `temperature != 1`; omit temperature in OpenAI-compatible clients or AI analysis silently fails.
- [NDJSON streaming on Replit](ndjson-streaming-express-replit.md) — use `res.on("close")`+`writableFinished` (NOT `req.on("close")`); persist on disconnect; proxy doesn't buffer; gate fallback to avoid dup rows.
- [Skill fingerprint & relation matching](skill-fingerprint-matching.md) — don't put display name in fingerprint path; match modified by file-path Jaccard (hash-Jaccard misses single-file edits), report content-aware similarity.
- [Testing api-server from shell](api-server-local-curl.md) — external `$REPLIT_DEV_DOMAIN/api` curl returns HTTP 000; curl `http://localhost:<PORT>/api` instead (port from workflow log).
- [Stale codegen & unapplied migrations](skillguard-stale-codegen-and-migrations.md) — "field already in API" tasks: dev/test DB + lib `dist/*.d.ts` lag; run drizzle push + `tsc -b` the lib.
- [Mocking fetch in api-server route tests](api-server-fetch-mocking-in-tests.md) — route tests run app in-process; delegate localhost requests to real fetch, only synthesize upstream; filter spy calls by URL.
- [Custom JWT cookie auth](custom-jwt-auth.md) — auth uses jose HS256 JWT in httpOnly `session` cookie; SESSION_SECRET required; admin seeded once from ADMIN_EMAIL+ADMIN_PASSWORD env vars.
- [/api/rules localization](rules-endpoint-localization.md) — list-rules endpoint must localize by `lang` query (not just scan findings) or German leaks into EN/ES catalog/admin.