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+---
+phase: 07-research-agent-search
+plan: "02"
+subsystem: search
+tags: [search, nlp, ai, frontend, go, react]
+dependency_graph:
+  requires: [07-01]
+  provides: [search-endpoint, nl-search-ui]
+  affects: [DashboardPage, FilterBar, api-router]
+tech_stack:
+  added: []
+  patterns:
+    - NL query sanitize → LLM extraction → in-memory filter (no raw text to NetBox)
+    - TDD: failing tests written first, handler implemented to green
+    - Debounced NL input (400ms) with TanStack Query (enabled guard on length > 2)
+key_files:
+  created:
+    - internal/api/handlers/search.go
+    - internal/api/handlers/search_test.go
+  modified:
+    - internal/api/router.go
+    - cmd/hwlab/main.go
+    - web/src/lib/api.ts
+    - web/src/components/inventory/FilterBar.tsx
+    - web/src/pages/DashboardPage.tsx
+decisions:
+  - Used SearchNetBoxClient and SearchAIClient narrow interfaces in search.go for testability without importing ai package in tests
+  - extractJSON helper strips markdown code fences from LLM response before JSON parse
+  - NL search row placed below existing filter row (additive, not replacing) to keep local filter intact
+  - displayLoading/displayItems derived state avoids duplicating isLoading/searchLoading logic
+metrics:
+  duration: "~12 minutes"
+  completed: "2026-04-10"
+  tasks_completed: 2
+  files_changed: 7
+---
+
+# Phase 07 Plan 02: Natural Language Search Summary
+
+Natural language inventory search via Tier 1 LLM (Gemma 4): user query sanitized, translated to structured filter params (catalog_status + name_contains), applied in-memory against ListDevices(200), returned as InventoryItem JSON; dashboard gains a debounced NL search input with volt accent styling and fallback to substring match on LLM parse failure.
+
+## Tasks Completed
+
+| Task | Name | Commit | Files |
+|------|------|--------|-------|
+| 1 | SearchHandler — NL query to NetBox filter | 9db7707 | search.go, search_test.go, router.go, main.go |
+| 2 | Frontend NL search bar + api.ts wiring | 7db093c | api.ts, FilterBar.tsx, DashboardPage.tsx |
+
+## What Was Built
+
+### Backend (Task 1)
+
+`internal/api/handlers/search.go` provides `SearchHandler` with `SearchDevices(w, r)`:
+
+1. Validates `q` param — returns 400 if empty
+2. Sanitizes query: strips non-printable chars, truncates to 200 runes (T-07-05)
+3. Calls `tier1.TextComplete` with an extraction prompt requesting `{"catalog_status","name_contains","tag"}` JSON
+4. Calls `extractJSON` to strip markdown fences before parse (LLM sometimes wraps in code blocks)
+5. On parse failure: logs warning, falls back to `NameContains = rawQuery` (never 500)
+6. `tag` field logged as not implemented and ignored (MVP)
+7. Fetches `ListDevices(ctx, 200)`, applies in-memory filter, encodes result
+
+Router wired: `GET /api/search` with nil-guard 503 fallback. `main.go` constructs `handlers.NewSearchHandler(nbClient, tier1)` and passes to `NewRouter`.
+
+TDD: 4 tests written before implementation — `TestSearch_EmptyQ`, `TestSearch_LLMParseFallback`, `TestSearch_CatalogStatusFilter`, `TestSearch_NameContainsAndStatus` — all pass.
+
+### Frontend (Task 2)
+
+`web/src/lib/api.ts`: `fetchSearch(q)` added — calls `GET /api/search?q=<encoded>`.
+
+`FilterBar.tsx` restructured to two rows:
+- Row 1: existing local text search + status select + item count + view toggle (unchanged)
+- Row 2: NL input with `Sparkles` icon (volt/60 tint), `border-volt/20` → `focus:border-volt`, `Loader2` spinner when `nlSearchLoading`
+- 400ms debounce via `useEffect + setTimeout` pattern; local `nlInputValue` state, propagates via `onNlQueryChange`
+
+`DashboardPage.tsx`:
+- `nlQuery` state + `useQuery({ queryKey: ['search', nlQuery], enabled: nlQuery.trim().length > 2 })`
+- `displayItems = nlQuery > 2 ? searchResults : filtered` — local filter fully preserved when NL empty
+- Loading/empty state messages adapt to NL vs local mode
+
+## Threat Mitigations Applied
+
+| Threat | Mitigation |
+|--------|-----------|
+| T-07-05 | `sanitizeQuery`: non-printable chars stripped, truncated to 200 runes |
+| T-07-06 | Only `catalog_status`, `name_contains`, `tag` extracted; unknown keys ignored; fallback on parse failure |
+
+## Deviations from Plan
+
+### Auto-added: extractJSON helper
+
+**Found during:** Task 1 implementation
+**Issue:** LLMs commonly wrap JSON responses in markdown code fences (` ```json ... ``` `), which breaks `json.Unmarshal` directly
+**Fix:** Added `extractJSON(s string) string` that finds first `{` and last `}` to extract the JSON object before parsing
+**Files modified:** internal/api/handlers/search.go
+**Rule:** Rule 2 — missing critical functionality (robustness of LLM output parsing)
+
+No other deviations — plan executed as specified.
+
+## Known Stubs
+
+None — all data paths are wired end-to-end.
+
+## Threat Flags
+
+None — no new network endpoints or trust boundaries beyond what the plan specified.
+
+## Self-Check: PASSED
+
+- internal/api/handlers/search.go: exists
+- internal/api/handlers/search_test.go: exists, 4 tests pass
+- internal/api/router.go: GET /api/search wired
+- web/src/lib/api.ts: fetchSearch exported
+- web/src/pages/DashboardPage.tsx: nlQuery state + useQuery present
+- web/src/components/inventory/FilterBar.tsx: NL input with debounce present
+- go build ./...: clean
+- npm run build: clean (built in 3.14s)
+- Commits 9db7707 and 7db093c: verified in git log