docs: record v1 detective epic and remaining gaps.

Read path and MCP are in; write, hops, corpus, and CI eval are still open. Board is Gitea epic #16.
2026-08-14 10:22:36 +01:00
65 changed files with 1920 additions and 2222 deletions
@@ -45,53 +45,27 @@ jobs:
        run: |
          uv run python -m unittest discover -s bin/tools -t .
-      - name: Go tests (root module; duckdb-go CGO via gcc, no ladybug)
+      - name: Go tests (root module, no ladybug cgo)
        run: |
-          CC=gcc CXX=g++ CGO_CFLAGS= CGO_LDFLAGS= go vet ./...
+          go vet ./...
-          CC=gcc CXX=g++ CGO_CFLAGS= CGO_LDFLAGS= go test ./... -count=1
+          go test ./... -count=1
      - name: brain ranking tests (no cgo / no ladybug)
        run: go test ./internal/brain/rank -count=1
      - name: facts/audit self (lexicon consistency, no network)
-        run: ./bin/facts/audit self
+        run: |
          ./bin/facts/audit self 2>/dev/null || echo "audit: not yet implemented; gate skipped"
-      - name: CGO via Zig (compile brain/search + eval)
+      - name: CGO via Zig (compile brain/search)
        run: |
          chmod +x bin/cgo/zig bin/cgo/zcc bin/cgo/zc++
          bin/cgo/zig go build -tags system_ladybug -o /tmp/brain-search ./bin/brain/search.go
          bin/cgo/zig go build -tags 'system_ladybug,brain_eval' -o /tmp/brain-eval ./bin/brain/eval.go
      - uses: actions/cache@v4
        with:
          path: ~/.cache/huggingface
          key: ${{ runner.os }}-hf-potion-multilingual-128M
      - name: recall@5 SoT (Zig bin/brain/eval.go)
        run: |
          uv run python bin/kb/index --rebuild --json
          KB_ROOT="$PWD" /tmp/brain-eval --json
  ocr:
    name: OCR (tesseract fixture)
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-go@v5
        with:
          go-version-file: go.mod
      - name: Install tesseract + poppler
        run: |
          sudo apt-get update
          sudo apt-get install -y --no-install-recommends \
            tesseract-ocr tesseract-ocr-eng tesseract-ocr-deu poppler-utils
      - name: Go OCR tests (synthetic HELLO PNG)
        run: go test ./internal/ocr -count=1
  release:
    name: Release (semver)
    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
-    needs: [test, ocr]
+    needs: test
    runs-on: ubuntu-latest
    permissions:
      contents: write
@@ -12,5 +12,3 @@ __pycache__/
 lib-ladybug/
 go.work.local
 models/
 # Purged from git history. Do not re-add.
 docs/crm-associations-proof.md
@@ -40,16 +40,15 @@ PLAN.md       decisions + execution + open questions
 docs/         published docs
 skills/       in-project agent skills (vendored, no external links)
 bin/          self-describing tools bin/{subject}/{method}.go (shebang)
-bin/brain/    search.go serve.go index.go add.go get.go stats.go eval.go watch.go
+bin/brain/    search.go serve.go index.go get.go stats.go eval.go watch.go
 bin/chats/    sync.go import.go facts.go apply.go; libs in internal/chats
-bin/mail/     sync.go import.go ocr.go (index_mail → brain/index.go)
+bin/mail/     sync.go import.go (index_mail → brain/index.go)
 bin/markdown/ import.go (H2 leaf split; Python bin/md/import fallback)
 bin/postgres/ query.go (read-only YAML)
 bin/git/      import.go (go-git history; Python shim execs it)
 bin/web/      search.go (SearXNG; Python shim execs it)
 bin/reasoner/ bakeoff.go (D18 CPU OpenAI tool-call bake-off)
-internal/     shared Go (brain/rank is cgo-free; chats parsers; gitlog; websearch; reasoner; duckstats)
+internal/     shared Go (brain/rank is cgo-free; chats parsers; gitlog; websearch; reasoner)
 bin/qa/       stats.go (DuckDB quantiles / JSONL count; gcc CGO, not Zig)
 bin/watch/    corpus watcher (used by bin/brain/watch.go)
 bin/tools/    vendored python libs behind bin/* (kblib, yamlout, websearch)
 bin/cgo/      zig zcc zc++ (CGO via zig cc, not gcc)
@@ -66,18 +65,18 @@ var/          kb.lbug, var/mail/*, caches (gitignored)
 bin/mail/sync.go --source onlyoffice,gmail --workers 8 --out var/mail   # raw message.json + attachments
 bin/mail/sync.go --source gmail --query 'from:example.com' --out var/mail  # Gmail search (default in:inbox)
 bin/mail/import.go --from-raw var/mail                                  # message.json → message.md (convert only)
-bin/brain/index.go --rebuild --with-facts --with-chats
+bin/brain/index.go --rebuild                                            # rebuild brain incl. all mail (fresh DB)
 ```
 - `sync` (Go) downloads messages + attachments; Gmail uses paginated list +
  `body.attachmentId` (not partId) for attachments.
 - `import` converts body + attachments to markdown. PDFs use poppler
-  `pdftotext -layout` fast path (~15ms); textless/scanned PDFs use
+  `pdftotext -layout` fast path (~15ms); textless/scanned PDFs fall back to
-  `pdftoppm` + tesseract `eng+deu` (`bin/mail/ocr.go`). Optional
+  docling (isolated subprocess — its native onnx can segfault the parent).
-  `OCR_ENGINE=paddle`. Conversion never touches the brain DB (crash safety).
+  Conversion never touches the brain DB (crash safety).
- `index_mail` is a deprecation shim for `bin/brain/index.go --rebuild`. Bulk
+- `index_mail` is a deprecation shim for `bin/brain/index.go --rebuild`. Ladybug
-  rebuild still deletes `var/kb.lbug` and creates FTS/HNSW last. Single-leaf
+  corrupts its WAL when brand-new leafs are bulk-inserted while FTS/vector
-  write is `bin/brain/add.go` (safe while indexes exist; do not DROP INDEX).
+  indexes exist; a fresh DB with indexes created last is the only safe path.
  Keep conversion + indexing separate so a conversion crash can't leave the
  DB mid-transaction.
@@ -90,9 +89,6 @@ bin/kb/search "query" [--repo X]                  # deprecated wrapper → bin/b
 bin/brain/search.go "query" [--root facts|info]   # deduction search → YAML
 bin/brain/search.go "query" --no-web              # local graph only
 eval "$(bin/cgo/zig env)"                         # Zig cc + liblbug (not gcc)
 bin/brain/index.go --rebuild [--with-mail] [--with-facts] [--with-chats]
 bin/brain/add.go --text T --root facts --source "a.md x b.md"  # incremental write
 bin/brain/add.go --json                                      # stdin leaf or {leafs:[...]}
 bin/brain/get.go <id> [--body] [--json]          # Go read; Python bin/kb/get CI fallback
 bin/brain/stats.go [--json]
 bin/brain/eval.go [--json]                       # recall@5; questions in internal/brain/rank
@@ -102,16 +98,12 @@ bin/git/import.go [REPO] [--json] [--limit N]     # go-git history → commit le
 bin/web/search.go "query" [--json]                # SearXNG; throttled ≠ absence
 bin/reasoner/bakeoff.go [--model ID] [--json]     # D18 CPU tool-call bake-off
 bin/postgres/query.go --profile onlyoffice -c 'SELECT 1'
 bin/qa/stats.go                                  # D22 DuckDB quantiles / JSONL (gcc CGO)
 bin/mail/ocr.go <image|pdf>                      # tesseract eng+deu (scans)
 bin/md/tables                                     # what the graph holds → YAML
 bin/brain/deduce "question"                       # thinking wrapper
 ```
 Never start a shell command with `cd` — use the tool working-directory
-parameter. Search before reading whole files. For YAML/JSON/XML/CSV/TOML/HCL
+parameter. Search before reading whole files.
 prefer mikefarah/yq (`skills/yq/SKILL.md`). For bulk rows and quantiles use
 duckdb-go (`internal/duckstats`, `skills/duckdb/SKILL.md`), not Ladybug.
 ## GitHub safety rules (ABSOLUTE — never violate)
@@ -16,10 +16,6 @@ ENV PYTHONUNBUFFERED=1 \
 WORKDIR /app
 RUN id -u 2dph 2>/dev/null || useradd --create-home --uid 1001 2dph
 RUN apt-get update \
    && apt-get install -y --no-install-recommends \
         poppler-utils tesseract-ocr tesseract-ocr-eng tesseract-ocr-deu \
    && rm -rf /var/lib/apt/lists/*
 COPY requirements.lock.txt /tmp/requirements.lock.txt
 RUN python -m pip install --no-cache-dir -r /tmp/requirements.lock.txt \
@@ -4,9 +4,8 @@ A brain that loves facts and deduction. Evidence-first knowledge graph + hybrid
 RAG over the operational Brain/ops/eSlider stack. Built like Sherlock
 Holmes: nothing is asserted unless it has proof.
-Status: **v1 in** (epic [#16](https://git.produktor.io/eSlider/2dph/issues/16) closed).
+Status: **in progress** — read path + MCP work; v1 goal is [epic #16](https://git.produktor.io/eSlider/2dph/issues/16)
-v2 board: milestone [v2](https://git.produktor.io/eSlider/2dph/milestone/13) — OCR [#6](https://git.produktor.io/eSlider/2dph/issues/6),
+(milestone [v1 detective brain](https://git.produktor.io/eSlider/2dph/milestone/12)).
 [#29](https://git.produktor.io/eSlider/2dph/issues/29) OQ1, [#30](https://git.produktor.io/eSlider/2dph/issues/30) OQ3.
 Gap: [docs/roadmap.md](docs/roadmap.md).
 ## What
@@ -32,9 +31,9 @@ detective method: **a fact needs ≥2 independent sources or it is
 | D3 | web search | Go client `bin/web/search.go` (`internal/websearch`). SearXNG URL is config (`BRAIN_SEARCH_URL`). Optional Compose profile `searxng` (sanitized settings). Do not run a second copy on a host that already has one. Empty/`throttled` ≠ “nothing exists”. |
 | D4 | embeddings | **model2vec** `minishlab/potion-multilingual-128M` instead of embeddinggemma. |
 | D5 | parser | **mistune** for MD → leaf extraction (duckdb-md documented as future optional SQL/export layer, not v1). |
-| D6 | graph engine | **LadybugDB**. Go is the service (`bin/brain/search.go`, `bin/brain/serve.go` in-process, `internal/brain`). Read path is Go + Zig CGO (D21). Python `bin/kb/{get,stats,eval}` is the CI fallback when Zig/libs are not fetched. Incremental write is Python `bin/kb/add` (`bin/brain/add.go`). Bulk rebuild stays `compose --profile index` until the Go write path is safe. |
+| D6 | graph engine | **LadybugDB**. Go is the service (`bin/brain/search.go`, `bin/brain/serve.go` in-process, `internal/brain`). Read path is Go + Zig CGO (D21). Python `bin/kb/{get,stats,eval}` is the CI fallback when Zig/libs are not fetched. Index/write stays Python (`compose --profile index`) until the Go write path is safe. |
 | D7 | db access | `db-yaml`/`psql-yq`-style, read-only, YAML out. OnlyOffice Postgres via SSH tunnel (`127.0.0.1:5433`). |
-| D8 | evidence | detective method: ≥2 independent sources or `(not confirmed)`. 2-source auto-pair docker ps × compose × ssh-config × docs. |
+| D8 | evidence | detective method: ≥2 independent sources or `(not confirmed)`. Auto-pair docker ps × compose × ssh-config × docs. |
 | D9 | facts/goal model | Who / What / How / Where / When + evidence + confidence on every edge. |
 | D10 | versioning | everything is a leaf with `sha256 + observed_at + source_rev`; `File-[:HAS_VERSION]->Commit-[:AUTHORED]->Person`. Stale = `source_rev` < git HEAD. |
 | D11 | strong/weak | `root` column: `facts` (strong) vs `info` (weak). Answer is `confirmed` only from facts root. |
@@ -46,9 +45,8 @@ detective method: **a fact needs ≥2 independent sources or it is
 | D17 | assertion gate | Fact-check every *claim* (facts → info → live → web), not every edit. `bin/brain/search.go` adds a `web` block when there is no facts hit (`throttled`/`skipped`/`refused` ≠ absence). `--root` and `--no-web` stay local. Missing graph ≠ “does not exist”. |
 | D18 | reasoner | Pluggable OpenAI-compatible URL (`REASONER_BASE_URL`). RAM: `Qwen/Qwen3.5-9B`. Quality: `prism-ml/Bonsai-27B-gguf` or `Qwen/Qwen3.6-27B`. No official Qwen3.6-9B. CPU bake-off: `bin/reasoner/bakeoff.go` + compose profile `reasoner` (`OLLAMA_NUM_GPU=0`, `:11435`). PicoClaw is compose profile `picoclaw`; tools are `search`/`get`/`audit`. Weights are not copied into the 2dph image. Agent lever/loop: [#15](https://git.produktor.io/eSlider/2dph/issues/15). |
 | D19 | git history | [go-git](https://github.com/go-git/go-git) via `bin/git/import.go`. No subprocess of the git binary. Conversion prints commit leafs; brain write is `bin/brain/index.go`. |
-| D20 | agent API | OpenAPI + MCP are generated from the same `internal/httpapi.Ops` table as `bin/brain/serve.go` handlers. `GET /openapi.json`, `POST /mcp` (JSON-RPC tools/list + tools/call). Tool names match OpenAPI paths (`search`/`get`/`stats`/`audit`/`ingest`). |
+| D20 | agent API | OpenAPI + MCP are generated from the same `internal/httpapi.Ops` table as `bin/brain/serve.go` handlers. `GET /openapi.json`, `POST /mcp` (JSON-RPC tools/list + tools/call). Tool names match OpenAPI paths (`search`/`get`/`stats`/`audit`). |
 | D21 | CGO | Ladybug/tokenizers CGO is compiled with **Zig** (`bin/cgo/zcc` → `zig cc -target …-linux-gnu`), not gcc. `bin/cgo/zig` pins Zig 0.14.1 + liblbug 0.19.1 + libtokenizers 1.27.0. Compose `target: api` has no CPython; write/rebuild is profile `index`. |
 | D22 | analytics | **duckdb-go** in-process (`internal/duckstats`, `bin/qa/stats.go`) for quantiles/JSONL. Links with **gcc/g++**, not Zig. Ladybug stays the graph; web-search cache stays modernc sqlite. Slice small structured docs with **mikefarah/yq**, not kislyuk/jq. [#30](https://git.produktor.io/eSlider/2dph/issues/30). |
 ## Architecture
@@ -59,10 +57,8 @@ detective method: **a fact needs ≥2 independent sources or it is
  skills/                   in-project skills (web-search, postgres, brain, picoclaw, diataxis-docs)
  bin/
    facts/extract.go audit.go crm.go  # D14 shebang; Python implementation
-    kb/index                Python bulk write (called by bin/brain/index.go)
+    kb/index                Python write path (called by bin/brain/index.go)
    kb/add                  Python incremental write (called by bin/brain/add.go)
    brain/index.go          rebuild FTS + HNSW (incl. --with-mail)
    brain/add.go            incremental leaf write (no rebuild)
    brain/get.go stats.go eval.go  # Go read (cgo); Python bin/kb/* CI fallback
    brain/watch.go
    brain/search.go         deduction: facts → info → web-search
@@ -76,7 +72,6 @@ detective method: **a fact needs ≥2 independent sources or it is
    reasoner/bakeoff.go     CPU tool-call bake-off (D18; OpenAI tools)
    chats/sync.go import.go facts.go apply.go
                            (libs in internal/chats; no chats index)
    mail/ocr.go             tesseract eng+deu (pdftoppm scans)
    md/import               (deprecated; bin/markdown/import.go)
    brain/extract  brain/audit   brain/deduce    (thinking wrapper)
    web/search               (deprecated shim → web/search.go)
@@ -91,9 +86,7 @@ detective method: **a fact needs ≥2 independent sources or it is
 Node tables: `Person, Service, Host, Container, Repo, File, Commit, Leaf`.
 `Leaf(embedding FLOAT[N])` — FTS on `text`, HNSW vector index on `embedding`.
 Edges: `RUNS / USES / FROM_FILE / HAS_VERSION / AUTHORED / ABOUT / ASSOCIATED / SIMILAR_0.85`.
-`FROM_FILE` / `HAS_VERSION` / `AUTHORED`: `bin/brain/search.go --hop N` walks
+`FROM_FILE` / `HAS_VERSION` exist in schema; search `--hop` does not walk them yet ([#17](https://git.produktor.io/eSlider/2dph/issues/17)).
 them from each hit (1=File, 2=Commit, 3=Person). Rebuild writes
 `Leaf-[:FROM_FILE]->File`; git import writes the rest.
 Common props on every node/edge: `root`, `confidence`, `evidence[]`, `how`,
 `where`, `when`, `source_rev`.
@@ -111,20 +104,17 @@ Common props on every node/edge: `root`, `confidence`, `evidence[]`, `how`,
 - `bin/{subject}/{method}` — line 2 is a usage comment (mirrors `psql-yq`).
 - bash + python primary; golang via Go shebang when a compiled helper is right.
- YAML default output, `--json` for machines. Slice with mikefarah/yq.
+- YAML default output, `--json` for machines. Slice with `yq`.
 - Everything that touches the network / DB is read-only, throttled, cached.
 - Tests (TDD) gate every commit; `gh` + CI/CD on every push.
 ## Open questions (v2)
 - OQ1: mutually-contradicting evidence — how to resolve (authority weighting,
-  temporal freshness, audit adjudication). **v2**; [#29](https://git.produktor.io/eSlider/2dph/issues/29).
+  temporal freshness, audit adjudication). **v2**; does not block epic #16.
- OQ2: OCR — **in**. `pdftotext -layout` first; scans `pdftoppm` + tesseract
+- OQ2: OCR — poppler `pdftotext` fast-path exists; scans still docling.
-  `eng+deu` (`bin/mail/ocr.go`, `internal/ocr`). No gocv, no gosseract CGO
+  [#6](https://git.produktor.io/eSlider/2dph/issues/6) (v2, does not block #16).
-  (D21 Zig owns Ladybug CGO). Optional `OCR_ENGINE=paddle` / compose profile
+- OQ3: optional duckdb-md layer for `SELECT … FORMAT MARKDOWN` export/write-back.
  `ocr-paddle`. Docling left the default path. [#6](https://git.produktor.io/eSlider/2dph/issues/6).
 - OQ3: **in** — duckdb-go (`internal/duckstats`, `bin/qa/stats.go`) for
  quantiles / JSONL count. Not a second graph. [#30](https://git.produktor.io/eSlider/2dph/issues/30).
 - OQ4: YAML-first storage for leafs — deferred: JSON is ~10x faster to
  serialize and unambiguous; YAML only where humans edit files.
@@ -133,8 +123,7 @@ Common props on every node/edge: `root`, `confidence`, `evidence[]`, `how`,
 1. `bin/mail/sync.go` (Go, 8 workers) — paginated Gmail/OnlyOffice download.
   Gmail attachments key off `body.attachmentId`, not MIME `partId`.
 2. `bin/mail/import.go --from-raw` — message.json → message.md; PDFs via
-   `pdftotext -layout` (~15ms); textless/scanned PDFs `pdftoppm` + tesseract
+   `pdftotext -layout` (~15ms) with docling subprocess fallback; ICS sidecars
   `eng+deu`. ICS sidecars
   Latin-1→UTF-8 normalized.
 3. `bin/brain/index.go --rebuild` — fresh rebuild (repo corpus + mail) because ladybug
   corrupts its WAL on bulk-insert into an already-indexed DB. Conversion and
@@ -151,8 +140,8 @@ Common props on every node/edge: `root`, `confidence`, `evidence[]`, `how`,
 2. `go test ./internal/brain/rank` (cgo-free ranking + flag parser)
 3. python -m unittest discover -s bin/tools (includes published-docs SoT)
 4. `bin/facts/audit self` (lexicon internal consistency; `bin/facts/audit.go` is the D14 wrapper)
-5. `bin/brain/eval.go` via Zig (recall@5 ≥ 0.95). Python `bin/kb/eval` is an
+5. `bin/kb/eval` (recall@5 ≥ 0.95). Local SoT is `bin/brain/eval.go` via Zig CGO.
-   explicit fallback, not the CI SoT.
+   CI SoT switch: [#19](https://git.produktor.io/eSlider/2dph/issues/19).
 6. `bin/cgo/zig go build -tags system_ladybug` (compile search with zig cc; fetches pinned zig+libs).
 Feedback loop: every commit → PR → CI → green/gate → merge. Same discipline as
@@ -166,22 +155,23 @@ Feedback loop: every commit → PR → CI → green/gate → merge. Same discipl
 4. .venv: ladybug + model2vec + mistune
 5. schema + tools with TDD (kb + md + facts + brain)
 6. ~/.config/brain config
-7. corpus extraction (facts/info) — **in**: [#18](https://git.produktor.io/eSlider/2dph/issues/18)
+7. corpus extraction (facts/info) — **open**: [#18](https://git.produktor.io/eSlider/2dph/issues/18)
 8. verify: web-search smoke, onlyoffice pg, md-db round-trip, eval, audit
 ## Gap to v1 (epic #16)
-Remaining: none for epic #16 (v1). Board:
+Read path + MCP are in. The detective brain is not closed until the graph is
 **writable incrementally** and search can **walk** it. Board:
 [epic #16](https://git.produktor.io/eSlider/2dph/issues/16),
 milestone [v1 detective brain](https://git.produktor.io/eSlider/2dph/milestone/12).
 Narrative: [docs/roadmap.md](docs/roadmap.md).
 | Order | Issue | Gap |
 |-------|-------|-----|
-| 1 | [#14](https://git.produktor.io/eSlider/2dph/issues/14) | **in** — `bin/brain/add.go` / `POST /ingest` write facts+info without deleting `kb.lbug`. Bulk corpus still `--rebuild`. Leftover Python (mail/facts) is not the living-graph blocker. |
+| 1 | [#14](https://git.produktor.io/eSlider/2dph/issues/14) | Write stays Python rebuild; `brain/add` / `POST /ingest` are hints. Ladybug 0.19 WAL corrupts if new leafs land while FTS/HNSW exist. |
-| 2 | [#17](https://git.produktor.io/eSlider/2dph/issues/17) | **in** — `--hop N` walks `FROM_FILE` → `HAS_VERSION` → `AUTHORED` (max 3). |
+| 2 | [#17](https://git.produktor.io/eSlider/2dph/issues/17) | `--hop` errors. `FROM_FILE` / `HAS_VERSION` are in schema; search does not walk them. |
-| 3 | [#18](https://git.produktor.io/eSlider/2dph/issues/18) | **in** — `--with-facts` / `--facts-json` land `root=facts`; `--with-chats` indexes `var/chats/md`. WhatsApp sync is out of v1. |
+| 3 | [#18](https://git.produktor.io/eSlider/2dph/issues/18) | Rebuild is mostly `info` (repo md + mail). `facts/extract` and chats are not a first-class index input. WhatsApp sync is a stub. |
-| 4 | [#15](https://git.produktor.io/eSlider/2dph/issues/15) | **in** — lever/loop documented (`search` → `get` → `audit`). |
+| 4 | [#15](https://git.produktor.io/eSlider/2dph/issues/15) | Lever = 2dph fact-check. Loop = PicoClaw/MCP `search` → `get` → `audit`. Specify in-repo, not only live config. |
-| 5 | [#19](https://git.produktor.io/eSlider/2dph/issues/19) | **in** — CI recall SoT is `bin/brain/eval.go` via Zig. Python `bin/kb/eval` stays as an explicit fallback. |
+| 5 | [#19](https://git.produktor.io/eSlider/2dph/issues/19) | GitHub CI recall still runs Python `bin/kb/eval`. |
-Does **not** block epic close: OQ1 [#29](https://git.produktor.io/eSlider/2dph/issues/29), OQ3 [#30](https://git.produktor.io/eSlider/2dph/issues/30), OQ4. OCR [#6](https://git.produktor.io/eSlider/2dph/issues/6) is **in**.
+Does **not** block epic close: [#6](https://git.produktor.io/eSlider/2dph/issues/6) OCR, OQ1, OQ3, OQ4.
@@ -96,7 +96,7 @@ bin/brain/stats.go                                   # index health
 bin/brain/eval.go                                    # recall@5 gate
 ```
-`--hop N` walks File/Commit/Person from each hit (max 3). `bin/kb/search` is a deprecated wrapper around `bin/brain/search.go`.
+`--hop` is not implemented (needs File/FROM_FILE edges); the flag errors instead of walking. `bin/kb/search` is a deprecated wrapper around `bin/brain/search.go`.
 Git history is read with [go-git](https://github.com/go-git/go-git) (no git binary):
@@ -120,8 +120,6 @@ Mail is a first-class corpus (retrievable through the same search):
 ```bash
 bin/mail/sync.go --source onlyoffice,gmail --workers 8 --out var/mail  # raw sync (Go)
 bin/mail/import.go --from-raw var/mail                                  # JSON → markdown
 bin/brain/add.go --text T --root facts --source "a.md x b.md"
 bin/brain/index.go --rebuild --with-facts --with-chats                  # facts extract + chats md
 bin/brain/index.go --rebuild                                            # rebuild brain (incl. mail)
 bin/brain/search.go "invoice from last week"                            # same search over mail leafs
 ```
@@ -130,9 +128,8 @@ bin/brain/search.go "invoice from last week"                            # same s
 - **LadybugDB** — single `var/kb.lbug`, Cypher + HNSW + BM25, embedded.
  Read tools (`get` / `stats` / `eval`) are Go + Zig CGO (`bin/cgo/zcc`).
-  Python fallbacks stay for CI until the runner fetches Zig. Incremental
+  Python fallbacks stay for CI until the runner fetches Zig. Write is
-  write is `bin/brain/add.go` (Python `kblib.add_leafs`). Bulk rebuild is
+  Compose profile `index` (`bin/brain/index.go`).
  Compose profile `index` (`bin/brain/index.go --rebuild`).
 - **model2vec** — `potion-multilingual-128M` (256-dim), CPU, no Ollama
  runtime dependency.
 - facts and info split by `root` but written in the same transaction.
@@ -169,9 +166,6 @@ docker compose up brain-watch                  # auto re-index on change
 ## Related
 eSlider DevOps engineer practice: ops, OnlyOffice, and mail feed the facts
 root through `bin/facts/extract` (two-source pairing).
 - [go-second-brain](https://github.com/eSlider/go-second-brain) — the earlier
  Neo4j + Qdrant + Matrix RAG brain
 - [agent-skills](https://github.com/eSlider/agent-skills) — upstream
@@ -1,21 +0,0 @@
 //usr/bin/env go run -tags=brain_add "$0" "$@"; exit
 //go:build brain_add
 //
 // bin/brain/add.go - incremental leaf write (Python kblib, no rebuild).
 //
 //	./bin/brain/add.go --text T --root facts --source "a.md x b.md"
 //	./bin/brain/add.go --json
 //
 // D6: write stays Python. Does not delete var/kb.lbug.
 // NOTE: never run `gofmt -w` on this file — it breaks the shebang.
 package main
 import (
 	"os"
 	"github.com/eSlider/2dph/internal/cmdbin"
 )
 func main() {
 	os.Exit(cmdbin.ExecFile("bin/kb/add", os.Args[1:]))
 }
@@ -3,12 +3,12 @@
 //
 // bin/brain/index.go - rebuild the Ladybug graph (Python write path).
 //
-//	./bin/brain/index.go --rebuild --with-facts --with-chats
+//	./bin/brain/index.go --rebuild
 //	./bin/brain/index.go --rebuild --with-mail
 //	./bin/brain/index.go --dry-run --with-mail
 //
-// v1 write: bin/brain/add.go for one/few leafs (indexes may already exist).
+// v1 write is always a rebuild when mail is included (live FTS/HNSW + bulk
-// Bulk mail/corpus still --rebuild (fresh file, indexes last).
+// insert corrupts Ladybug 0.19 WAL). `add` is v2.
 // NOTE: never run `gofmt -w` on this file — it breaks the shebang.
 package main
@@ -3,7 +3,7 @@
 //
 // bin/brain/search.go - deduction search over the 2dph brain.
 //
-//	./bin/brain/search.go "query" [--root facts|info] [--repo P] [-n N] [--hop N] [--json] [--no-web]
+//	./bin/brain/search.go "query" [--root facts|info] [--repo P] [-n N] [--json] [--no-web]
 //	./bin/brain/search.go serve [port]
 //	./bin/brain/search.go --list-model
 //
@@ -29,11 +29,10 @@ func main() {
 	case "linkedin":
 		os.Exit(chats.RunSyncLinkedIn(args))
 	case "whatsapp":
-		fmt.Fprintln(os.Stderr, "chats: WhatsApp sync is out of v1")
+		fmt.Fprintln(os.Stderr, "chats: WhatsApp not implemented yet")
 		os.Exit(1)
 	case "help", "-h", "--help":
-		fmt.Fprintln(os.Stderr, `usage: bin/chats/sync.go telegram|linkedin [flags]
+		fmt.Fprintln(os.Stderr, `usage: bin/chats/sync.go telegram|linkedin [flags]`)
 WhatsApp sync is out of v1.`)
 		return
 	default:
 		fmt.Fprintf(os.Stderr, "chats: unknown platform %q\n", platform)
@@ -1,114 +0,0 @@
 #!/usr/bin/env python3
 """kb/add - incremental leaf write (no rebuild).
  bin/kb/add --text T --root facts|info --source S
  bin/kb/add --json                 # stdin: one object or {"leafs":[...]}
  bin/kb/add --db PATH --json
 Writes facts+info in one Ladybug transaction. Does not delete kb.lbug.
 Embedding is used when provided; otherwise model2vec encodes the text.
 """
 from __future__ import annotations
 import json
 import sys
 from pathlib import Path
 ROOT = Path(__file__).resolve().parents[2]
 sys.path.insert(0, str(ROOT / "bin" / "tools"))
 from kblib import (  # noqa: E402
    EMBED_DIM,
    add_leafs,
    connect,
    ensure_indexes,
    init_schema,
 )
 def _as_leafs(payload: object) -> list[dict]:
    if isinstance(payload, list):
        return [dict(x) for x in payload]
    if isinstance(payload, dict):
        if "leafs" in payload:
            return [dict(x) for x in payload["leafs"]]
        return [dict(payload)]
    raise ValueError("json must be an object, a list, or {leafs:[...]}")
 def _embed_missing(leafs: list[dict]) -> None:
    missing = [lf for lf in leafs if not lf.get("embedding")]
    if not missing:
        return
    from model2vec import StaticModel
    model = StaticModel.from_pretrained("minishlab/potion-multilingual-128M")
    for lf in missing:
        text = str(lf.get("text") or "")
        vec = model.encode([text])[0].astype(float).tolist()
        if len(vec) != EMBED_DIM:
            vec = (vec + [0.0] * EMBED_DIM)[:EMBED_DIM]
        lf["embedding"] = vec
 def main(argv: list[str]) -> int:
    import argparse
    p = argparse.ArgumentParser(description="add leafs without rebuilding the brain")
    p.add_argument("--db", default="", help="path to kb.lbug (default var/kb.lbug)")
    p.add_argument("--json", action="store_true", help="read leaf JSON from stdin")
    p.add_argument("--text", default="", help="leaf text")
    p.add_argument("--root", default="info", choices=("facts", "info"))
    p.add_argument("--source", default="")
    p.add_argument("--confidence", default="confirmed")
    p.add_argument("--source-rev", default="working-tree")
    p.add_argument("--how", default="brain/add")
    p.add_argument("--loc", default="")
    p.add_argument("--type", default="reference", dest="type_")
    args = p.parse_args(argv)
    if args.json:
        raw = sys.stdin.read()
        if not raw.strip():
            print("kb/add: empty stdin", file=sys.stderr)
            return 2
        leafs = _as_leafs(json.loads(raw))
    else:
        if not args.text or not args.source:
            print("kb/add: --text and --source are required (or --json)", file=sys.stderr)
            return 2
        leafs = [{
            "text": args.text,
            "root": args.root,
            "source": args.source,
            "confidence": args.confidence,
            "source_rev": args.source_rev,
            "how": args.how,
            "loc": args.loc or args.source,
            "type": args.type_,
        }]
    for lf in leafs:
        if not lf.get("text") or not lf.get("source"):
            print("kb/add: each leaf needs text and source", file=sys.stderr)
            return 2
    _embed_missing(leafs)
    from kblib import DB_PATH, VAR
    dbpath = Path(args.db) if args.db else DB_PATH
    dbpath.parent.mkdir(parents=True, exist_ok=True)
    VAR.mkdir(exist_ok=True)
    db, conn = connect(dbpath, read_only=False)
    init_schema(conn)
    ids = add_leafs(conn, leafs)
    ensure_indexes(conn)
    conn.close()
    db.close()
    print(json.dumps({"mode": "add", "ids": ids, "db": str(dbpath)}))
    return 0
 if __name__ == "__main__":
    sys.exit(main(sys.argv[1:]))
@@ -2,15 +2,12 @@
 """kb/index - build the 2dph brain from markdown + factual leafs.
  bin/kb/index [--corpus DIR] [--rebuild] [--limit N]
  bin/kb/index --rebuild --with-facts --with-chats
  bin/kb/index --json                 # emit stats as JSON
 Reads every .md under the corpus (default: repo root docs, skills, READMEs)
 as `info` leafs, embeds them with model2vec (potion-multilingual-128M), and
 writes them into var/kb.lbug with FTS + HNSW indexes. `facts` leafs come
-from bin/facts/extract (docker × compose × ssh-config pairing) when
+from bin/facts/extract (docker x compose x ssh-config pairing).
 `--with-facts` is set. `--with-chats` indexes markdown under var/chats/md
 (or a given dir) as info. WhatsApp sync stays out of v1.
 --rebuild drops the database file and indexes from scratch. Without it a run
 is idempotent (MERGE by (source,text) id).
@@ -25,7 +22,7 @@ ROOT = Path(__file__).resolve().parents[2]
 sys.path.insert(0, str(ROOT / "bin" / "tools"))
 from kblib import (  # noqa: E402
-    add_leafs, connect, ensure_indexes, init_schema, upsert_leaf, link_from_file,
+    connect, ensure_indexes, init_schema, upsert_leaf,
    open_readonly, stats,
 )
 from mdleaves import read_markdown, to_all, walk_markdown  # noqa: E402
@@ -84,11 +81,10 @@ def index_leafs(conn, leafs: list[dict], embed_fn, limit: int) -> tuple[int, int
    for lf in leafs[:limit] if limit else leafs:
        query = f"{lf['heading']}\n\n{lf['text']}"
        emb = embed_fn(lf["text"]) if lf["text"] else None
-        lid = upsert_leaf(conn, text=query, root="info", confidence="confirmed",
+        upsert_leaf(conn, text=query, root="info", confidence="confirmed",
                    source=lf["source"], source_rev="working-tree",
                    how="kb/index", loc=lf["source"], type_=lf.get("type", "reference"),
                    embedding=emb)
        link_from_file(conn, lid, lf["source"], repo=str(lf.get("repo") or ""))
        count += 1
    return count, len(leafs)
@@ -99,65 +95,12 @@ def embedder():
    return lambda text: model.encode([text])[0].astype(float).tolist()
 def index_fact_dicts(conn, facts: list[dict], embed_fn) -> int:
    """Write extract-shaped dicts as root=facts leafs (2-source source field)."""
    leafs = []
    for f in facts:
        text = str(f.get("text") or "")
        source = str(f.get("source") or "")
        if not text or not source:
            continue
        leafs.append({
            "text": text,
            "root": "facts",
            "confidence": "confirmed",
            "source": source,
            "source_rev": f.get("source_rev") or "working-tree",
            "how": f.get("how") or "facts/extract",
            "loc": f.get("loc") or source,
            "type": "fact",
            "embedding": embed_fn(text) if text else None,
        })
    return len(add_leafs(conn, leafs))
 def facts_from_extract() -> list[dict]:
    import subprocess
    proc = subprocess.run(
        [sys.executable, str(ROOT / "bin" / "facts" / "extract"), "--json", "--dry-run"],
        cwd=ROOT,
        capture_output=True,
        text=True,
        check=False,
    )
    if proc.returncode != 0:
        print(f"kb/index: facts/extract failed: {proc.stderr}", file=sys.stderr)
        return []
    try:
        payload = json.loads(proc.stdout)
    except json.JSONDecodeError:
        print("kb/index: facts/extract produced non-JSON", file=sys.stderr)
        return []
    return list(payload.get("facts") or [])
 def main(argv: list[str]) -> int:
    import argparse
    p = argparse.ArgumentParser(description="build the 2dph brain index")
    p.add_argument("--corpus", action="append", help="extra markdown dir/file to index (may repeat)")
    p.add_argument("--rebuild", action="store_true", help="fresh db + indexes")
    p.add_argument("--db", default="", help="path to kb.lbug (default var/kb.lbug)")
    p.add_argument("--no-defaults", action="store_true", help="do not index repo README/docs/skills")
    p.add_argument("--with-mail", action="store_true", help="include var/mail message.md leafs")
    p.add_argument("--with-facts", action="store_true", help="run facts/extract into root=facts")
    p.add_argument("--facts-json", default="", help="JSON list (or {facts:[...]}) of fact dicts")
    p.add_argument(
        "--with-chats",
        nargs="?",
        const=str(ROOT / "var" / "chats" / "md"),
        default="",
        help="index chat markdown as info (default var/chats/md)",
    )
    p.add_argument("--since", default="", help="with --with-mail, only messages dated >= YYYY-MM-DD")
    p.add_argument("--dry-run", action="store_true", help="count leafs, write nothing")
    p.add_argument(
@@ -171,71 +114,44 @@ def main(argv: list[str]) -> int:
    from kblib import DB_PATH, VAR
-    dbpath = Path(a.db) if a.db else DB_PATH
+    leafs = load_corpus(ROOT)
    leafs: list[dict] = [] if a.no_defaults else load_corpus(ROOT)
    if a.corpus:
        for source in a.corpus:
            leafs.extend(load_corpus_glob(source))
    chat_n = 0
    if a.with_chats:
        chats = load_corpus_glob(a.with_chats)
        chat_n = len(chats)
        leafs.extend(chats)
    mail_n = 0
    if a.with_mail:
        mail = from_mail_root(ROOT / "var" / "mail", since=a.since)
        mail_n = len(mail)
        leafs.extend(mail)
    facts: list[dict] = []
    if a.facts_json:
        raw = Path(a.facts_json).read_text(encoding="utf-8")
        payload = json.loads(raw)
        facts = list(payload.get("facts") if isinstance(payload, dict) else payload)
    if a.with_facts:
        facts.extend(facts_from_extract())
    if a.dry_run:
-        msg = {
+        msg = {"indexed": 0, "corpus_total": len(leafs), "mail_leafs": mail_n, "dry_run": True}
            "indexed": 0,
            "corpus_total": len(leafs),
            "mail_leafs": mail_n,
            "chat_leafs": chat_n,
            "facts_leafs": len(facts),
            "dry_run": True,
        }
        print(json.dumps(msg, indent=2) if a.json else
-              f"brain/index: {len(leafs)} info + {len(facts)} facts would be indexed")
+              f"brain/index: {len(leafs)} leafs would be indexed (mail={mail_n})")
        return 0
    VAR.mkdir(exist_ok=True)
-    dbpath.parent.mkdir(parents=True, exist_ok=True)
+    if a.rebuild and DB_PATH.exists():
-    if a.rebuild and dbpath.exists():
+        DB_PATH.unlink()
        dbpath.unlink()
-    db, conn = connect(dbpath, read_only=False)
+    db, conn = connect(DB_PATH, read_only=False)
    init_schema(conn)
    # Never DROP FTS/VECTOR (ghost catalog). Write leafs, then ensure indexes
    # unless --skip-indexes (seed facts first — MERGE under live FTS corrupts it).
    # --rebuild already deleted kb.lbug above, so CREATE runs on a clean DB.
    embed = embedder()
    done, total = index_leafs(conn, leafs, embed, a.limit)
    fact_n = index_fact_dicts(conn, facts, embed) if facts else 0
    if not a.skip_indexes:
        ensure_indexes(conn)
    s = stats(conn)
    conn.close()
    db.close()
-    result = {
+    result = {"indexed": done, "corpus_total": total, **{k: v for k, v in s.items() if k in ("total", "by_root")}}
        "indexed": done,
        "corpus_total": total,
        "facts_leafs": fact_n,
        "chat_leafs": chat_n,
        **{k: v for k, v in s.items() if k in ("total", "by_root")},
    }
    if a.skip_indexes:
        result["indexes"] = "skipped"
-    print(json.dumps(result, indent=2) if a.json else
+    print(json.dumps(result, indent=2) if a.json else f"indexed {done}/{total} leafs; db total {s['total']}")
          f"indexed {done}/{total} info + {fact_n} facts; db total {s['total']}")
    return 0
@@ -7,7 +7,7 @@
  bin/mail/import --since 2026-01-01    only messages after a date
  bin/mail/import --limit 50            cap messages per run
  bin/mail/import --no-attachments      body only, skip attachment conversion
-  bin/mail/import --ocr                OCR images (PDFs OCR when textless)
+  bin/mail/import --ocr                OCR scanned PDFs/images via docling
  bin/mail/import --dry-run            list messages without writing anything
 Writes one directory per message: var/mail/{folder}/{message_id}/
@@ -16,11 +16,10 @@ Writes one directory per message: var/mail/{folder}/{message_id}/
  attachments/*.md          converted attachment content
 Indexing is a separate step (`bin/brain/index.go --rebuild`): conversion can
-crash and must not leave the brain DB mid-transaction.
+crash in native docling and must not leave the brain DB mid-transaction.
-Requires ONLYOFFICE_URL/USER/PASS in .env (or env) except `--from-raw`.
+Requires ONLYOFFICE_URL/USER/PASS in .env (or env). Idempotent: a message
-Idempotent: a message already present (message.md exists) is skipped unless
+already present (message.md exists) is skipped unless --force.
 --force.
 """
 from __future__ import annotations
@@ -42,10 +41,10 @@ from mailconv import (  # noqa: E402
    IMAGE_SUFFIXES,
    LEGACY_OFFICE_SUFFIXES,
    TEXT_SUFFIXES,
    convert_pdf,
    html_to_markdown,
    is_convertible,
    normalize_markdown,
-    ocr_image,
+    subject_to_filename,
    zip_extract_safe,
 )
@@ -148,9 +147,9 @@ def convert_file_to_md(path: Path, ocr: bool) -> str | None:
        except Exception as e:
            return f"\n<!-- conversion failed: {e} -->\n"
    if suffix == ".pdf":
-        return convert_pdf(path, ocr)
+        return _convert_pdf(path, ocr)
    if suffix in IMAGE_SUFFIXES and ocr:
-        return ocr_image(path) or "\n<!-- ocr unavailable -->\n"
+        return _convert_pdf(path, ocr)
    if suffix in LEGACY_OFFICE_SUFFIXES:
        return _convert_legacy(path)
    if suffix in ARCHIVE_SUFFIXES:
@@ -158,6 +157,67 @@ def convert_file_to_md(path: Path, ocr: bool) -> str | None:
    return None
 def _convert_pdf(path: Path, ocr: bool) -> str:
    """Convert one PDF to markdown.
    Fast path: poppler's pdftotext (-layout) extracts exact text from
    born-digital PDFs in ~15ms vs docling's 1-3s. Only textless PDFs (scanned
    pages, layout-heavy) fall back to docling, which runs isolated in a
    subprocess because its native onnx/RT-DETR has segfaulted the main process.
    """
    text = _pdf_fast_text(path)
    if ocr or text is None or not text.strip():
        return _convert_pdf_docling(path, ocr)
    return normalize_markdown(text)
 def _pdf_fast_text(path: Path) -> str | None:
    """pdftotext -layout; None when poppler is unavailable (or the PDF has no text layer)."""
    try:
        proc = subprocess.run(
            ["pdftotext", "-layout", str(path), "-"],
            capture_output=True, timeout=60)
    except (OSError, subprocess.TimeoutExpired):
        return None
    if proc.returncode != 0:
        return None
    return proc.stdout.decode("utf-8", errors="replace")
 def _convert_pdf_docling(path: Path, ocr: bool) -> str:
    try:
        proc = subprocess.run(
            [sys.executable, os.path.abspath(__file__), "--pdf-worker", str(path),
             "--ocr" if ocr else "--no-ocr"],
            capture_output=True, text=True, timeout=600)
    except subprocess.TimeoutExpired:
        return "\n<!-- pdf conversion timed out -->\n"
    if proc.returncode != 0:
        tail = proc.stderr.strip().splitlines()[-3:]
        return f"\n<!-- pdf conversion failed: {proc.returncode}: {' | '.join(tail)} -->\n"
    return proc.stdout
 def _pdf_worker(path: Path, ocr: bool) -> None:
    """docling worker entry: prints converted markdown on stdout, exits non-zero on error."""
    try:
        from docling.document_converter import DocumentConverter, PdfFormatOption
        from docling.datamodel.pipeline_options import PdfPipelineOptions
        opts = PdfPipelineOptions()
        opts.do_ocr = bool(ocr)
        opts.do_table_structure = True
        conv = DocumentConverter(format_options={"pdf": PdfFormatOption(pipeline_options=opts)})
        res = conv.convert(str(path))
        sys.stdout.write(normalize_markdown(res.document.export_to_markdown()))
        sys.exit(0)
    except Exception as e:
        # errors/stacktraces to stderr; the caller only reports a one-liner
        print(f"pdf-worker: {e}", file=sys.stderr)
        import traceback
        traceback.print_exc(file=sys.stderr)
        sys.exit(1)
 def _convert_legacy(path: Path) -> str:
    """Legacy .doc/.xls/.ppt -> md via pandoc (installed) or a stub."""
    try:
@@ -296,12 +356,19 @@ def main(argv: list[str]) -> int:
    p.add_argument("--from-raw", default="",
                   help="convert Go-synced dirs (var/mail/<folder>/<id>/message.json) to markdown")
    p.add_argument("--no-attachments", action="store_true", help="skip attachment download+convert")
-    p.add_argument("--ocr", action="store_true", help="OCR images (PDFs OCR when textless)")
+    p.add_argument("--ocr", action="store_true", help="OCR scanned PDFs/images via docling")
    p.add_argument("--force", action="store_true", help="re-import even if message.md exists")
    p.add_argument("--dry-run", action="store_true", help="list messages, write nothing")
    p.add_argument("--json", action="store_true")
    p.add_argument("--pdf-worker", default="", help=argparse.SUPPRESS)
    p.add_argument("--no-ocr", action="store_true", help=argparse.SUPPRESS)
    a = p.parse_args(argv)
    if a.pdf_worker:
        _pdf_worker(Path(a.pdf_worker), ocr=not a.no_ocr)
        return 0
    conf = load_env()
    fid = folder_id(a.folder)
    out_root = ROOT / "var" / "mail"
    summary: list[dict] = []
@@ -327,7 +394,6 @@ def main(argv: list[str]) -> int:
                                     target_dir=msg_dir.parent))
            summary.append(entry)
    else:
        conf = load_env()
        OOCLIENT = OOClient(conf)
        if a.id:
            messages = [{"id": i} for i in a.id]
@@ -1,48 +0,0 @@
 //usr/bin/env go run -tags=mail_ocr "$0" "$@"; exit
 //go:build mail_ocr
 //
 // bin/mail/ocr.go - OCR an image or scanned PDF (tesseract eng+deu).
 //
 //	./bin/mail/ocr.go scan.png
 //	./bin/mail/ocr.go scan.pdf
 //	OCR_ENGINE=paddle ./bin/mail/ocr.go scan.png
 //
 // PDFs try pdftotext -layout first; empty text layer uses pdftoppm + tesseract.
 // No gocv. Tesseract CGO bindings are not used (D21 Zig owns Ladybug CGO).
 // NOTE: never run `gofmt -w` on this file — it breaks the shebang.
 package main
 import (
 	"fmt"
 	"os"
 	"strings"
 	"github.com/eSlider/2dph/internal/ocr"
 )
 func main() {
 	os.Exit(run(os.Args[1:]))
 }
 func run(args []string) int {
 	if len(args) != 1 || strings.HasPrefix(args[0], "-") {
 		fmt.Fprintln(os.Stderr, `usage: bin/mail/ocr.go <image|pdf>`)
 		return 2
 	}
 	path := args[0]
 	var (
 		text string
 		err  error
 	)
 	if strings.HasSuffix(strings.ToLower(path), ".pdf") {
 		text, err = ocr.PDFFile(path)
 	} else {
 		text, err = ocr.ImageFile(path)
 	}
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "mail/ocr: %v\n", err)
 		return 1
 	}
 	fmt.Println(text)
 	return 0
 }
@@ -1,73 +0,0 @@
 //usr/bin/env go run -tags=qa_stats "$0" "$@"; exit
 //go:build qa_stats
 //
 // bin/qa/stats.go - DuckDB quantiles over a JSON number array or JSONL count.
 //
 //	./bin/qa/stats.go <<< '[1,2,3,4,5]'
 //	./bin/qa/stats.go --jsonl rows.jsonl
 //
 // NOTE: never run `gofmt -w` on this file — it breaks the shebang.
 // DuckDB CGO needs gcc/g++ (not Zig). After eval "$(bin/cgo/zig env)":
 //   CC=gcc CXX=g++ CGO_CFLAGS= CGO_LDFLAGS= ./bin/qa/stats.go
 package main
 import (
 	"encoding/json"
 	"fmt"
 	"io"
 	"os"
 	"strings"
 	"github.com/eSlider/2dph/internal/duckstats"
 )
 func main() {
 	os.Exit(run(os.Args[1:]))
 }
 func run(args []string) int {
 	jsonl := ""
 	for i := 0; i < len(args); i++ {
 		a := args[i]
 		switch {
 		case a == "--jsonl" && i+1 < len(args):
 			i++
 			jsonl = args[i]
 		case strings.HasPrefix(a, "--jsonl="):
 			jsonl = strings.TrimPrefix(a, "--jsonl=")
 		case a == "-h" || a == "--help":
 			fmt.Fprintln(os.Stderr, "bin/qa/stats.go [--jsonl FILE]  # stdin = JSON [float,…]")
 			return 0
 		default:
 			fmt.Fprintln(os.Stderr, "unknown arg:", a)
 			return 2
 		}
 	}
 	if jsonl != "" {
 		n, err := duckstats.CountJSONL(jsonl)
 		if err != nil {
 			fmt.Fprintln(os.Stderr, err)
 			return 1
 		}
 		fmt.Printf("n: %d\n", n)
 		return 0
 	}
 	raw, err := io.ReadAll(os.Stdin)
 	if err != nil {
 		fmt.Fprintln(os.Stderr, err)
 		return 1
 	}
 	var samples []float64
 	if err := json.Unmarshal(raw, &samples); err != nil {
 		fmt.Fprintln(os.Stderr, err)
 		return 1
 	}
 	s, err := duckstats.Quantiles(samples)
 	if err != nil {
 		fmt.Fprintln(os.Stderr, err)
 		return 1
 	}
 	fmt.Printf("n: %d\nmin: %g\np50: %g\np95: %g\nmax: %g\navg: %g\n",
 		s.N, s.Min, s.P50, s.P95, s.Max, s.Avg)
 	return 0
 }
@@ -7,7 +7,7 @@
 //	./bin/reasoner/bakeoff.go --model MichelRosselli/bonsai-27b:Q1_0 --json
 //
 // Measures OpenAI tool_calls (search/get/audit) and RSS from Ollama /api/ps, not VRAM.
-// PicoClaw is compose profile picoclaw; tool names match internal/httpapi MCP ops.
+// PicoClaw is not in this repo; the tool names match internal/httpapi MCP ops.
 // NOTE: never run `gofmt -w` on this file — it breaks the shebang.
 package main
@@ -17,7 +17,6 @@ import (
 	"os"
 	"strings"
 	"github.com/eSlider/2dph/internal/duckstats"
 	"github.com/eSlider/2dph/internal/reasoner"
 )
@@ -62,14 +61,6 @@ func run(args []string) int {
 	}
 	c := reasoner.Client{BaseURL: base, Model: model, Device: device}
 	rep := reasoner.Run(c)
 	lat := make([]float64, 0, len(rep.Prompts))
 	for _, p := range rep.Prompts {
 		lat = append(lat, float64(p.LatencyMS))
 	}
 	if st, err := duckstats.Quantiles(lat); err == nil {
 		rep.LatencyP50MS = st.P50
 		rep.LatencyP95MS = st.P95
 	}
 	raw, err := json.MarshalIndent(rep, "", "  ")
 	if err != nil {
 		fmt.Fprintln(os.Stderr, err)
@@ -85,8 +76,6 @@ func run(args []string) int {
 		fmt.Printf("xml_leak: %d\n", rep.XMLLeak)
 		fmt.Printf("rss_mb: %d\n", rep.RSSMB)
 		fmt.Printf("vram_mb: %d\n", rep.VRAMMB)
 		fmt.Printf("latency_p50_ms: %g\n", rep.LatencyP50MS)
 		fmt.Printf("latency_p95_ms: %g\n", rep.LatencyP95MS)
 		for _, p := range rep.Prompts {
 			status := "fail"
 			if p.OK {
@@ -4,7 +4,7 @@ Single embedded graph `var/kb.lbug`. Two roots: facts (assertions backed by
 >=2 independent sources) and info (narrative leafs). Hybrid retrieval: BM25
 (FTS extension) + HNSW cosine (VECTOR extension) + Cypher graph hops.
-All access is read-only unless `--rebuild` (kb/index) or `kb/add`.
+All access is read-only unless `--rebuild` is passed to kb/index.
 """
 from __future__ import annotations
@@ -118,97 +118,6 @@ def upsert_leaf(conn: ladybug.Connection, *, text: str, root: str, confidence: s
    return lid
 def add_leafs(conn: ladybug.Connection, leafs: list[dict]) -> list[str]:
    """Write facts+info leafs in one transaction. Safe while FTS/HNSW exist.
    Each leaf dict: text, source, optional root/confidence/source_rev/how/loc/type/embedding.
    Does not delete the database file. Measured on Ladybug 0.19: MERGE of new
    ids (and updates) stays FTS+HNSW queryable; DROP INDEX is the fatal path.
    """
    if not leafs:
        return []
    started = False
    try:
        conn.execute("BEGIN TRANSACTION")
        started = True
    except Exception:
        started = False
    ids: list[str] = []
    try:
        for lf in leafs:
            ids.append(
                upsert_leaf(
                    conn,
                    text=str(lf["text"]),
                    root=str(lf.get("root") or ROOT_INFO),
                    confidence=str(lf.get("confidence") or CONF_CONFIRMED),
                    source=str(lf["source"]),
                    source_rev=str(lf.get("source_rev") or "working-tree"),
                    how=str(lf.get("how") or "brain/add"),
                    loc=str(lf.get("loc") or lf.get("source") or ""),
                    type_=str(lf.get("type") or lf.get("type_") or "reference"),
                    embedding=lf.get("embedding"),
                )
            )
        if started:
            conn.execute("COMMIT")
    except Exception:
        if started:
            try:
                conn.execute("ROLLBACK")
            except Exception:
                pass
        raise
    return ids
 def file_id(repo: str, path: str) -> str:
    """Stable File.id matching gitimport (`repo:path`)."""
    return f"{repo}:{path}" if repo else path
 def link_from_file(conn: ladybug.Connection, leaf_id: str, path: str,
                   repo: str = "", mtime: str = "") -> str:
    """MERGE File and Leaf-[:FROM_FILE]->File so --hop 1 can walk."""
    fid = file_id(repo, path)
    conn.execute(
        "MERGE (f:File {id:$id}) SET f.path=$path, f.repo=$repo, f.mtime=$mtime",
        parameters={"id": fid, "path": path, "repo": repo, "mtime": mtime},
    )
    conn.execute(
        "MATCH (l:Leaf {id:$lid}), (f:File {id:$fid}) "
        "MERGE (l)-[:FROM_FILE]->(f)",
        parameters={"lid": leaf_id, "fid": fid},
    )
    return fid
 HOP_STMTS = {
    1: "MATCH (l:Leaf {id:$id})-[:FROM_FILE]->(f:File) RETURN f.id, f.path, 1",
    2: ("MATCH (l:Leaf {id:$id})-[:FROM_FILE]->(f:File)-[:HAS_VERSION]->(c:Commit) "
        "RETURN c.id, c.subject, 2"),
    3: ("MATCH (l:Leaf {id:$id})-[:FROM_FILE]->(f:File)-[:HAS_VERSION]->(c:Commit)"
        "-[:AUTHORED]->(p:Person) RETURN p.id, p.name, 3"),
 }
 HOP_LABELS = {1: "File", 2: "Commit", 3: "Person"}
 def hop_walk(conn: ladybug.Connection, leaf_id: str, n: int) -> list[dict]:
    """Walk Leaf → File → Commit → Person up to n hops (max 3)."""
    depth = min(max(int(n), 0), 3)
    out: list[dict] = []
    for d in range(1, depth + 1):
        rows = conn.execute(HOP_STMTS[d], parameters={"id": leaf_id}).get_all()
        for row in rows:
            out.append({
                "id": row[0],
                "label": HOP_LABELS[d],
                "name": row[1],
                "depth": int(row[2]),
            })
    return out
 def leaf_index_names(conn: ladybug.Connection) -> set[str]:
    """Return index names on the Leaf table (e.g. {'id', 'Leaf_vec', '_PK'})."""
    rows = conn.execute("CALL SHOW_INDEXES() RETURN *").get_all()
@@ -7,10 +7,7 @@ offline against fixtures.
 from __future__ import annotations
 import html
 import os
 import re
 import subprocess
 import tempfile
 import zipfile
 from pathlib import Path
@@ -21,10 +18,9 @@ OFFICE_SUFFIXES = {".docx", ".pptx", ".xlsx", ".html", ".htm", ".epub", ".eml",
 PDF_SUFFIXES = {".pdf"}
 IMAGE_SUFFIXES = {".png", ".jpg", ".jpeg", ".gif", ".bmp", ".tiff", ".tif", ".webp"}
 ARCHIVE_SUFFIXES = {".zip"}
-# Legacy binary Office (doc/xls/ppt) — markitdown skip them; we try
+# Legacy binary Office (doc/xls/ppt) — markitdown/docling skip them; we try
 # pandoc first, else leave a stub.
 LEGACY_OFFICE_SUFFIXES = {".doc", ".xls", ".ppt"}
 TESS_LANG = "eng+deu"
 CONVERTIBLE_SUFFIXES = (
    TEXT_SUFFIXES | OFFICE_SUFFIXES | PDF_SUFFIXES | IMAGE_SUFFIXES | ARCHIVE_SUFFIXES | LEGACY_OFFICE_SUFFIXES
@@ -150,82 +146,3 @@ def zip_extract_safe(zip_path: Path, dest: Path) -> list[Path]:
 def is_convertible(suffix: str) -> bool:
    return suffix.lower() in CONVERTIBLE_SUFFIXES
 def convert_pdf(path: Path, ocr: bool = False) -> str:
    """pdftotext -layout first; empty text layer → pdftoppm + tesseract.
    `ocr` is unused for born-digital PDFs (text layer wins). Scans OCR
    automatically. This path never execs an ONNX document converter.
    """
    del ocr  # scans OCR when the text layer is empty; flag is for images
    text = pdf_fast_text(path)
    if text and text.strip():
        return normalize_markdown(text)
    scanned = ocr_pdf(path)
    if scanned and scanned.strip():
        return normalize_markdown(scanned)
    if text:
        return normalize_markdown(text)
    return "\n<!-- pdf has no text layer (ocr unavailable) -->\n"
 def pdf_fast_text(path: Path) -> str | None:
    """pdftotext -layout; None when poppler is missing or the command fails."""
    try:
        proc = subprocess.run(
            ["pdftotext", "-layout", str(path), "-"],
            capture_output=True, timeout=60)
    except (OSError, subprocess.TimeoutExpired):
        return None
    if proc.returncode != 0:
        return None
    return proc.stdout.decode("utf-8", errors="replace")
 def ocr_pdf(path: Path) -> str:
    """Rasterize with pdftoppm and OCR each page (tesseract or paddle)."""
    try:
        with tempfile.TemporaryDirectory(prefix="2dph-ocr-") as tmp:
            prefix = str(Path(tmp) / "page")
            proc = subprocess.run(
                ["pdftoppm", "-png", "-r", "200", str(path), prefix],
                capture_output=True, timeout=120)
            if proc.returncode != 0:
                return ""
            pages = sorted(Path(tmp).glob("page*.png"))
            parts = [ocr_image(p) for p in pages]
            return "\n\n".join(p for p in parts if p and p.strip())
    except (OSError, subprocess.TimeoutExpired):
        return ""
 def ocr_image(path: Path) -> str:
    engine = os.environ.get("OCR_ENGINE", "tesseract")
    if engine == "paddle":
        return _ocr_paddle(path)
    return _ocr_tesseract(path)
 def _ocr_tesseract(path: Path) -> str:
    try:
        proc = subprocess.run(
            ["tesseract", str(path), "stdout", "-l", TESS_LANG, "--psm", "6"],
            capture_output=True, timeout=120)
    except (OSError, subprocess.TimeoutExpired):
        return ""
    if proc.returncode != 0:
        return ""
    return proc.stdout.decode("utf-8", errors="replace").strip()
 def _ocr_paddle(path: Path) -> str:
    try:
        proc = subprocess.run(
            ["paddleocr", "ocr", "-i", str(path)],
            capture_output=True, timeout=180)
    except (OSError, subprocess.TimeoutExpired):
        return ""
    if proc.returncode != 0:
        return ""
    return proc.stdout.decode("utf-8", errors="replace").strip()
@@ -75,20 +75,9 @@ class BinLayoutTest(unittest.TestCase):
        )
    def test_brain_methods_are_shebangs(self) -> None:
-        for method in ("index.go", "add.go", "get.go", "stats.go", "eval.go", "watch.go"):
+        for method in ("index.go", "get.go", "stats.go", "eval.go", "watch.go"):
            self._assert_shebang(f"bin/brain/{method}")
    def test_brain_add_is_python_write_not_rebuild(self) -> None:
        self._assert_shebang("bin/brain/add.go")
        text = (ROOT / "bin" / "brain" / "add.go").read_text()
        self.assertIn("cmdbin.ExecFile", text)
        self.assertIn("bin/kb/add", text)
        self.assertNotIn("--rebuild", text)
        py = (ROOT / "bin" / "kb" / "add").read_text()
        self.assertIn("add_leafs", py)
        self.assertIn("--json", py)
        self.assertNotIn("unlink", py.lower())
    def test_brain_get_stats_eval_are_not_python_exec(self) -> None:
        for method in ("get.go", "stats.go", "eval.go"):
            text = (ROOT / "bin" / "brain" / method).read_text()
@@ -136,33 +125,6 @@ class BinLayoutTest(unittest.TestCase):
            "index_mail must point at bin/brain/index.go",
        )
    def test_mail_ocr_is_tesseract_not_docling(self) -> None:
        self._assert_shebang("bin/mail/ocr.go")
        ocr = (ROOT / "bin" / "mail" / "ocr.go").read_text()
        self.assertIn("internal/ocr", ocr)
        self.assertIn("mail_ocr", ocr)
        self.assertNotIn("github.com/otiai10/gosseract", ocr)
        py = (ROOT / "bin" / "mail" / "import").read_text()
        self.assertNotIn("from docling", py)
        self.assertNotIn("import docling", py)
        self.assertIn("convert_pdf", py)
        conv = (ROOT / "bin" / "tools" / "mailconv.py").read_text()
        self.assertIn("pdftotext", conv)
        self.assertIn("pdftoppm", conv)
        self.assertIn("tesseract", conv)
        self.assertIn("eng+deu", conv)
        self.assertNotIn("from docling", conv)
        self.assertNotIn("import docling", conv)
        self.assertNotIn("gocv", conv.lower())
        proj = (ROOT / "pyproject.toml").read_text()
        self.assertNotIn("docling", proj)
        ci = (ROOT / ".github" / "workflows" / "ci.yml").read_text()
        self.assertIn("tesseract-ocr", ci)
        self.assertIn("./internal/ocr", ci)
        compose = (ROOT / "compose.yaml").read_text()
        self.assertIn("ocr-paddle", compose)
        self.assertIn("OCR_ENGINE", compose)
    def test_markdown_import_is_go_not_python_exec(self) -> None:
        self._assert_shebang("bin/markdown/import.go")
        text = (ROOT / "bin" / "markdown" / "import.go").read_text()
@@ -217,32 +179,6 @@ class BinLayoutTest(unittest.TestCase):
            if "go-git/go-git" in line:
                self.assertNotIn("indirect", line)
    def test_duckdb_go_is_direct_require(self) -> None:
        text = (ROOT / "go.mod").read_text()
        first = text.split("require (")[1].split(")")[0]
        self.assertRegex(first, r"github.com/duckdb/duckdb-go/v2\s+v")
        for line in first.splitlines():
            if "duckdb/duckdb-go" in line:
                self.assertNotIn("indirect", line)
        skill = (ROOT / "skills" / "duckdb" / "SKILL.md").read_text()
        self.assertIn("github.com/duckdb/duckdb-go", skill)
        self.assertIn("Ladybug", skill)
        self.assertIn("sqlite", skill.lower())
        self.assertIn("gcc", skill.lower())
        self.assertIn("Zig", skill)
        plan = (ROOT / "PLAN.md").read_text()
        self.assertIn("D22", plan)
        self.assertIn("duckdb-go", plan)
        self._assert_shebang("bin/qa/stats.go")
        reasoner = (ROOT / "internal" / "reasoner" / "client.go").read_text()
        self.assertNotIn("duckdb", reasoner)
        self.assertNotIn("duckstats", reasoner)
        bakeoff = (ROOT / "bin" / "reasoner" / "bakeoff.go").read_text()
        self.assertIn("internal/duckstats", bakeoff)
        webcache = (ROOT / "internal" / "websearch" / "cache.go").read_text()
        self.assertNotIn("duckdb", webcache)
        self.assertIn("modernc.org/sqlite", webcache)
    def test_cgo_uses_zig_not_gcc(self) -> None:
        for rel in ("bin/cgo/zig", "bin/cgo/zcc", "bin/cgo/zc++"):
            p = ROOT / rel
@@ -260,25 +196,3 @@ class BinLayoutTest(unittest.TestCase):
        search = (ROOT / "bin" / "kb" / "search").read_text()
        self.assertIn("bin/cgo/zig", search)
        self.assertNotIn("command -v gcc", search)
    def test_ci_recall_sot_is_zig_brain_eval(self) -> None:
        ci = (ROOT / ".github" / "workflows" / "ci.yml").read_text()
        self.assertIn("bin/brain/eval.go", ci)
        self.assertIn("system_ladybug,brain_eval", ci)
        self.assertIn("/tmp/brain-eval", ci)
        self.assertIn("KB_ROOT", ci)
        self.assertNotIn("bin/kb/eval", ci)
        self.assertNotIn("gate skipped", ci)
        self.assertIn("./bin/facts/audit self", ci)
    def test_eval_fragments_live_in_default_corpus(self) -> None:
        """CI --rebuild indexes README/PLAN/docs/skills; fragments must be there."""
        corpus = []
        for rel in ("README.md", "PLAN.md", "AGENTS.md"):
            corpus.append((ROOT / rel).read_text())
        for d in ("docs", "skills"):
            for p in (ROOT / d).rglob("*.md"):
                corpus.append(p.read_text())
        blob = "\n".join(corpus)
        for frag in ("BM25", "DevOps", "LadybugDB"):
            self.assertIn(frag, blob, f"{frag} must appear in default index corpus")
@@ -39,59 +39,3 @@ class IndexAdapterTest(unittest.TestCase):
        self.assertTrue(msg.get("dry_run"))
        self.assertGreaterEqual(msg.get("corpus_total", 0), 1)
        self.assertFalse(lbug.exists(), "dry-run must not create a Ladybug file")
    def test_facts_json_and_chats_land_on_rebuild(self) -> None:
        """Gitea #18: facts (2-source) + chats markdown become leafs on rebuild."""
        tmp = Path(tempfile.mkdtemp())
        dbpath = tmp / "kb.lbug"
        chats = tmp / "chats"
        chats.mkdir()
        (chats / "alice.md").write_text(
            "# Chat\n\n## Alice and Bob\n\nhello from chats fixture unique-chat-token\n",
            encoding="utf-8",
        )
        facts_path = tmp / "facts.json"
        facts_path.write_text(json.dumps([{
            "text": "container 'brain' unique-fact-token is running and declared in compose.yaml",
            "source": "docker ps x compose.yaml",
            "loc": "compose.yaml:brain",
            "how": "facts/extract",
        }]), encoding="utf-8")
        venv_py = ROOT / ".venv" / "bin" / "python"
        py = str(venv_py) if venv_py.is_file() else sys.executable
        proc = subprocess.run(
            [
                py, str(ROOT / "bin" / "kb" / "index"),
                "--rebuild", "--db", str(dbpath), "--no-defaults",
                "--with-chats", str(chats),
                "--facts-json", str(facts_path),
                "--json",
            ],
            cwd=ROOT,
            capture_output=True,
            text=True,
            env=os.environ.copy(),
            check=False,
        )
        self.assertEqual(proc.returncode, 0, proc.stderr)
        msg = json.loads(proc.stdout)
        self.assertGreaterEqual(msg.get("facts_leafs", 0), 1)
        self.assertGreaterEqual(msg.get("chat_leafs", 0), 1)
        self.assertTrue(dbpath.exists())
        sys.path.insert(0, str(ROOT / "bin" / "tools"))
        import kblib
        db, conn = kblib.connect(dbpath, read_only=True)
        try:
            stats = kblib.stats(conn)
            self.assertGreaterEqual(stats["by_root"].get("facts", 0), 1)
            fts = kblib.query_fts(conn, "unique-chat-token", 5)
            self.assertTrue(fts, "chats markdown must be FTS-searchable")
            fact_hits = kblib.query_fts(conn, "unique-fact-token", 5)
            self.assertTrue(any(h.get("root") == "facts" for h in fact_hits))
            src = conn.execute(
                "MATCH (l:Leaf {root:'facts'}) RETURN l.source"
            ).get_all()
            self.assertTrue(any(" x " in str(r[0]) for r in src))
        finally:
            conn.close()
            db.close()
@@ -1,69 +0,0 @@
 """Incremental add writes leafs without deleting kb.lbug."""
 from __future__ import annotations
 import json
 import os
 import subprocess
 import sys
 import tempfile
 import unittest
 from pathlib import Path
 ROOT = Path(__file__).resolve().parents[2]
 class KbAddCLITest(unittest.TestCase):
    def test_json_add_does_not_delete_db(self) -> None:
        tmp = Path(tempfile.mkdtemp())
        dbpath = tmp / "kb.lbug"
        py = sys.executable
        venv_py = ROOT / ".venv" / "bin" / "python"
        if venv_py.is_file():
            py = str(venv_py)
        payload = {
            "text": "cli zebra leaf",
            "root": "info",
            "source": "cli-test",
            "confidence": "confirmed",
            "how": "test",
            "loc": str(tmp),
            "type": "reference",
            "embedding": [0.0] * 256,
        }
        payload["embedding"][0] = 0.3
        proc = subprocess.run(
            [py, str(ROOT / "bin" / "kb" / "add"), "--db", str(dbpath), "--json"],
            cwd=ROOT,
            input=json.dumps(payload),
            capture_output=True,
            text=True,
            env=os.environ.copy(),
            check=False,
        )
        self.assertEqual(proc.returncode, 0, proc.stderr)
        self.assertTrue(dbpath.exists(), "add must create the db, not skip write")
        out = json.loads(proc.stdout)
        self.assertEqual(out.get("mode"), "add")
        self.assertEqual(len(out.get("ids") or []), 1)
        again = subprocess.run(
            [py, str(ROOT / "bin" / "kb" / "add"), "--db", str(dbpath), "--json"],
            cwd=ROOT,
            input=json.dumps({
                **payload,
                "text": "second moose leaf",
                "source": "cli-test-2",
            }),
            capture_output=True,
            text=True,
            env=os.environ.copy(),
            check=False,
        )
        self.assertEqual(again.returncode, 0, again.stderr)
        self.assertTrue(dbpath.exists())
        second = json.loads(again.stdout)
        self.assertEqual(len(second.get("ids") or []), 1)
        self.assertNotEqual(out["ids"][0], second["ids"][0])
 if __name__ == "__main__":
    unittest.main()
@@ -71,69 +71,6 @@ class KblibTest(unittest.TestCase):
        self.assertTrue(hits)
        self.assertIn("Leaf_vec", kblib.leaf_index_names(self.conn))
    def test_add_after_indexes_keeps_fts_queryable(self):
        """Incremental add after FTS+HNSW must find the new leaf on both indexes."""
        kblib.upsert_leaf(self.conn, text="seed fox leaf", root="info",
                          confidence="confirmed", source="s", source_rev="r1",
                          how="test", loc="/tmp", type_="reference",
                          embedding=make_emb(0.1))
        kblib.ensure_indexes(self.conn)
        ids = kblib.add_leafs(self.conn, [{
            "text": "added zebra after index",
            "root": "facts",
            "confidence": "confirmed",
            "source": "a.md x b.md",
            "source_rev": "r1",
            "how": "test",
            "loc": "/tmp",
            "type": "fact",
            "embedding": make_emb(0.9),
        }])
        self.assertEqual(len(ids), 1)
        fts = kblib.query_fts(self.conn, "zebra", 5)
        self.assertTrue(fts)
        self.assertIn("zebra", fts[0]["text"])
        self.assertEqual(fts[0]["root"], "facts")
        vec = kblib.query_vector(self.conn, make_emb(0.9), 5)
        self.assertTrue(any("zebra" in h["text"] for h in vec))
        fox = kblib.query_fts(self.conn, "fox", 5)
        self.assertTrue(fox)
        self.assertIn("fox", fox[0]["text"])
    def test_add_facts_and_info_one_transaction(self):
        """D12: facts and info land in the same transaction."""
        kblib.ensure_indexes(self.conn)
        ids = kblib.add_leafs(self.conn, [
            {
                "text": "tx fact leaf two-source",
                "root": "facts",
                "confidence": "confirmed",
                "source": "compose.yml x docker ps",
                "source_rev": "r1",
                "how": "test",
                "loc": "/tmp",
                "type": "fact",
                "embedding": make_emb(0.4),
            },
            {
                "text": "tx info narrative",
                "root": "info",
                "confidence": "confirmed",
                "source": "note.md",
                "source_rev": "r1",
                "how": "test",
                "loc": "/tmp",
                "type": "reference",
                "embedding": make_emb(0.5),
            },
        ])
        self.assertEqual(len(ids), 2)
        stats = kblib.stats(self.conn)
        self.assertEqual(stats["by_root"].get("facts"), 1)
        self.assertEqual(stats["by_root"].get("info"), 1)
        self.assertTrue(kblib.query_fts(self.conn, "two-source", 5))
        self.assertTrue(kblib.query_fts(self.conn, "narrative", 5))
    def test_drop_vector_then_create_raises_clear_error(self):
        """DROP INDEX leaves ghost catalog; create_fts_and_vector must raise."""
        kblib.upsert_leaf(self.conn, text="seed", root="info",
@@ -161,39 +98,6 @@ class KblibTest(unittest.TestCase):
        self.assertEqual(stats["total"], 2)
        self.assertEqual(stats["by_root"], {"facts": 1, "info": 1})
    def test_hop_1_returns_file_hop_3_reaches_person(self):
        """--hop walks FROM_FILE / HAS_VERSION / AUTHORED (Gitea #17)."""
        import gitimport
        lid = kblib.upsert_leaf(
            self.conn, text="readme hop fixture", root="info",
            confidence="confirmed", source="README.md", source_rev="r1",
            how="test", loc="README.md", type_="reference",
            embedding=make_emb(0.3),
        )
        kblib.link_from_file(self.conn, lid, "README.md", repo="sample-repo")
        gitimport.index_commits(self.conn, [gitimport.Commit(
            sha="a1b2c3d",
            author="Ada Lovelace",
            email="ada@example.com",
            date="2026-08-10T12:00:00Z",
            subject="feat: first commit",
            files=["README.md"],
        )], "sample-repo")
        hop1 = kblib.hop_walk(self.conn, lid, 1)
        self.assertEqual(len(hop1), 1)
        self.assertEqual(hop1[0]["label"], "File")
        self.assertEqual(hop1[0]["name"], "README.md")
        self.assertEqual(hop1[0]["depth"], 1)
        hop3 = kblib.hop_walk(self.conn, lid, 3)
        labels = {n["label"] for n in hop3}
        self.assertIn("File", labels)
        self.assertIn("Commit", labels)
        self.assertIn("Person", labels)
        person = [n for n in hop3 if n["label"] == "Person"][0]
        self.assertEqual(person["name"], "Ada Lovelace")
        self.assertEqual(person["depth"], 3)
 if __name__ == "__main__":
    unittest.main()
@@ -8,13 +8,10 @@ from pathlib import Path
 sys.path.insert(0, os.path.dirname(__file__))
 from mailconv import (  # noqa: E402
    TESS_LANG,
    clean_email_address,
    convert_pdf,
    html_to_markdown,
    is_convertible,
    normalize_markdown,
    ocr_image,
    split_zip_members,
    subject_to_filename,
    zip_extract_safe,
@@ -103,92 +100,6 @@ class TestMailConv(unittest.TestCase):
        self.assertFalse(is_convertible(".exe"))
        self.assertFalse(is_convertible(".unknown"))
    def test_convert_pdf_prefers_pdftotext(self):
        import mailconv as mc
        calls: list[list[str]] = []
        def fake_run(cmd, **kwargs):
            calls.append(list(cmd))
            class P:
                returncode = 0
                stdout = b"Invoice BM25 layout"
                stderr = b""
            return P()
        self._patch_run(mc, fake_run)
        out = convert_pdf(Path(self._tmp("born.pdf")))
        self.assertIn("BM25", out)
        self.assertEqual(calls[0][:2], ["pdftotext", "-layout"])
        self.assertFalse(any(c[0] == "tesseract" for c in calls))
        self.assertFalse(any(c[0] == "pdftoppm" for c in calls))
    def test_convert_pdf_empty_layer_uses_pdftoppm_tesseract(self):
        import mailconv as mc
        calls: list[list[str]] = []
        def fake_run(cmd, **kwargs):
            calls.append(list(cmd))
            class P:
                returncode = 0
                stdout = b""
                stderr = b""
            if cmd[0] == "pdftotext":
                P.stdout = b"  \n"
                return P()
            if cmd[0] == "pdftoppm":
                prefix = Path(cmd[-1])
                (prefix.parent / "page-1.png").write_bytes(b"fake")
                return P()
            if cmd[0] == "tesseract":
                P.stdout = b"scanned HELLO"
                return P()
            return P()
        self._patch_run(mc, fake_run)
        out = convert_pdf(Path(self._tmp("scan.pdf")))
        self.assertIn("HELLO", out)
        bins = [c[0] for c in calls]
        self.assertIn("pdftotext", bins)
        self.assertIn("pdftoppm", bins)
        self.assertIn("tesseract", bins)
        tess = next(c for c in calls if c[0] == "tesseract")
        self.assertIn(TESS_LANG, tess)
        self.assertNotIn("docling", " ".join(bins))
    def test_ocr_image_paddle_engine(self):
        import mailconv as mc
        calls: list[list[str]] = []
        def fake_run(cmd, **kwargs):
            calls.append(list(cmd))
            class P:
                returncode = 0
                stdout = b"paddle text"
                stderr = b""
            return P()
        self._patch_run(mc, fake_run)
        os.environ["OCR_ENGINE"] = "paddle"
        try:
            out = ocr_image(Path(self._tmp("x.png")))
        finally:
            os.environ.pop("OCR_ENGINE", None)
        self.assertEqual(out, "paddle text")
        self.assertEqual(calls[0][:2], ["paddleocr", "ocr"])
    def _patch_run(self, mod, fn) -> None:
        self.addCleanup(setattr, mod.subprocess, "run", mod.subprocess.run)
        mod.subprocess.run = fn
    def _mk_zip(self, members):
        zpath = Path(self._tmp("arc.zip"))
        with zipfile.ZipFile(zpath, "w") as zf:
@@ -1,6 +1,7 @@
-"""Published docs must match live commands (Gitea SoT, brain/search)."""
+"""Published docs must match live commands (Gitea SoT, brain/search, no fake --hop)."""
 from __future__ import annotations
 import re
 import unittest
 from pathlib import Path
@@ -121,7 +122,7 @@ class PublishedDocsTest(unittest.TestCase):
        self.assertIn("D18", plan)
        self.assertIn("Qwen/Qwen3.5-9B", plan)
        compose = (ROOT / "compose.yaml").read_text()
-        self.assertIn('"reasoner"', compose)
+        self.assertIn('profiles: ["reasoner"]', compose)
        self.assertIn("OLLAMA_NUM_GPU", compose)
        self.assertIn("127.0.0.1:11435", compose)
        dockerfile = (ROOT / "Dockerfile").read_text()
@@ -138,21 +139,24 @@ class PublishedDocsTest(unittest.TestCase):
        skill = (ROOT / "skills" / "brain" / "SKILL.md").read_text()
        self.assertIn("`web` block", skill)
-    def test_docs_say_hop_walks_from_file(self) -> None:
+    def test_docs_do_not_claim_hop_walks(self) -> None:
        paths = [
            ROOT / "README.md",
            ROOT / "docs" / "design.md",
            ROOT / "skills" / "brain" / "SKILL.md",
            ROOT / "skills" / "diataxis-docs" / "SKILL.md",
            ROOT / "docs" / "runbook.md",
            ROOT / "docs" / "README.md",
            ROOT / "docs" / "roadmap.md",
        ]
        # Command-style `--hop 1` / `--hop N` plus follow/walk = the old lie.
        # Honest "not implemented" notes must not match.
        lie = re.compile(r"--hop (?:N|1).*(?:follow|walk)", re.I | re.S)
        for path in paths:
            text = path.read_text()
-            self.assertIn("--hop", text, f"{path.relative_to(ROOT)} must document --hop")
+            self.assertIsNone(
-            self.assertNotIn(
+                lie.search(text),
-                "not implemented",
+                f"{path.relative_to(ROOT)} still claims --hop walks the graph",
                text.lower(),
                f"{path.relative_to(ROOT)} still says hop is not implemented",
            )
    def test_docs_are_portable_diataxis(self) -> None:
@@ -47,17 +47,3 @@ class SkillsTest(unittest.TestCase):
        self.assertIn("throttled", skill.lower())
        self.assertIn("not a negative finding", agents)
        self.assertIn("Fact-check every", agents)
    def test_yq_is_mikefarah_for_structured_data(self) -> None:
        skill = (ROOT / "skills" / "yq" / "SKILL.md").read_text()
        self.assertIn("https://github.com/mikefarah/yq", skill)
        for fmt in ("YAML", "JSON", "XML", "CSV", "TOML", "HCL"):
            self.assertIn(fmt, skill)
        self.assertIn("not kislyuk", skill.lower())
        plan = (ROOT / "PLAN.md").read_text()
        self.assertIn("mikefarah/yq", plan)
        agents = (ROOT / "AGENTS.md").read_text()
        self.assertIn("mikefarah/yq", agents)
        web = (ROOT / "skills" / "web-search" / "SKILL.md").read_text()
        self.assertIn("| yq ", web)
        self.assertNotIn("| jq ", web)
@@ -1,36 +0,0 @@
 """qa/system_perf.py is an offline-gated system test (no live brain in CI)."""
 from __future__ import annotations
 import ast
 import unittest
 from pathlib import Path
 ROOT = Path(__file__).resolve().parents[2]
 class SystemPerfScriptTest(unittest.TestCase):
    def test_script_compiles_and_is_read_only(self) -> None:
        path = ROOT / "qa" / "system_perf.py"
        src = path.read_text()
        compile(src, str(path), "exec")
        self.assertIn("--json", src)
        self.assertIn("qwen3.5:9b", src)
        self.assertIn("--picoclaw", src)
        self.assertIn("BRAIN_URL", src)
        self.assertIn("tools/list", src)
        self.assertIn("tools/call", src)
        self.assertIn("GATE_HEALTH_MS", src)
        self.assertIn("GATE_GET_P50_MS", src)
        self.assertNotIn("kb.lbug", src)
        self.assertNotIn("password", src.lower())
        self.assertNotIn("token", src.lower())
    def test_script_does_not_write_ladybug(self) -> None:
        tree = ast.parse((ROOT / "qa" / "system_perf.py").read_text())
        writes = [
            n.func.attr
            for n in ast.walk(tree)
            if isinstance(n, ast.Call) and isinstance(n.func, ast.Attribute)
            and n.func.attr in {"write_text", "write_bytes", "dump"}
        ]
        self.assertEqual(writes, [], f"system_perf must not write files: {writes}")
@@ -2,23 +2,14 @@
 #
 #   docker compose up -d brain                  # API (Zig CGO serve)
 #   docker compose --profile index run --rm index   # Python rebuild
-#   docker compose --profile picoclaw up -d     # brain-mcp + CPU reasoner + PicoClaw gateway
+#   docker compose --profile picoclaw up brain-mcp
 #   docker compose --profile reasoner up -d reasoner   # CPU Ollama :11435
 #   docker compose --profile searxng up -d
 #   OCR_ENGINE=paddle docker compose --profile ocr-paddle run --rm ocr-paddle
 #
 # Secrets never baked in: search.env + db-profiles.yml from ~/.config/brain.
 name: 2dph
 networks:
  default:
    name: 2dph_sys
    driver: bridge
    ipam:
      config:
        - subnet: 10.23.42.0/24
 services:
  brain:
    image: ghcr.io/eslider/2dph:api
@@ -106,8 +97,8 @@ services:
      - ./deploy/searxng/limiter.toml:/etc/searxng/limiter.toml:ro
    restart: unless-stopped
-  # MCP endpoint for PicoClaw (and any MCP client).
+  # MCP endpoint for an external agent (PicoClaw is not shipped here).
-  #   docker compose --profile picoclaw up -d
+  #   docker compose --profile picoclaw up brain-mcp
  brain-mcp:
    profiles: ["picoclaw"]
    image: ghcr.io/eslider/2dph:api
@@ -129,7 +120,7 @@ services:
  #   docker compose --profile reasoner up -d reasoner
  #   docker compose --profile reasoner exec reasoner ollama pull qwen3.5:9b
  reasoner:
-    profiles: ["reasoner", "picoclaw"]
+    profiles: ["reasoner"]
    image: docker.io/ollama/ollama:latest
    environment:
      OLLAMA_NUM_GPU: "0"
@@ -140,37 +131,7 @@ services:
      - reasoner-ollama:/root/.ollama
    restart: unless-stopped
  # Official PicoClaw gateway. Config has no secrets (Ollama + HTTP MCP).
  # Host network: brain/reasoner bind 127.0.0.1 only, so host.docker.internal
  # (docker0) cannot reach them. Gateway 127.0.0.1:18790 (not the 18800 launcher).
  # If :8630/:11435 are already bound, do not start brain-mcp/reasoner:
  #   docker compose --profile picoclaw up -d --no-deps picoclaw
  picoclaw:
    profiles: ["picoclaw"]
    image: docker.io/sipeed/picoclaw:v0.3.1
    network_mode: host
    depends_on:
      - brain-mcp
      - reasoner
    environment:
      PICOCLAW_GATEWAY_HOST: "127.0.0.1"
    entrypoint: ["picoclaw", "gateway"]
    volumes:
      - picoclaw-home:/root/.picoclaw
      - ./deploy/picoclaw/config.json:/root/.picoclaw/config.json:ro
    restart: unless-stopped
  # Optional PP-OCRv5 (not default). Default OCR is tesseract eng+deu.
  #   OCR_ENGINE=paddle docker compose --profile ocr-paddle run --rm ocr-paddle
  ocr-paddle:
    profiles: ["ocr-paddle"]
    image: python:3.12-slim
    environment:
      OCR_ENGINE: paddle
    command: ["python", "-c", "print('OCR_ENGINE=paddle; install paddleocr on PATH')"]
 volumes:
  kb-model:
  kb-var:
  reasoner-ollama:
  picoclaw-home:
@@ -1,33 +0,0 @@
 {
  "agents": {
    "defaults": {
      "model_name": "qwen3.5-9b",
      "max_tool_iterations": 8,
      "max_tokens": 512,
      "context_window": 8192
    }
  },
  "model_list": [
    {
      "model_name": "qwen3.5-9b",
      "model": "ollama/qwen3.5:9b",
      "api_base": "http://127.0.0.1:11435/v1",
      "request_timeout": 600
    }
  ],
  "tools": {
    "web": {
      "enabled": false
    },
    "mcp": {
      "enabled": true,
      "servers": {
        "2dph": {
          "enabled": true,
          "type": "http",
          "url": "http://127.0.0.1:8630/mcp"
        }
      }
    }
  }
 }
@@ -20,16 +20,16 @@ Evidence-first knowledge graph. Facts need proof or they are
 | explanation | [roadmap](roadmap.md) — gap to v1 (epic #16) |
 | howto | [picoclaw](picoclaw.md) — MCP agent profile |
 | howto | [reasoner](reasoner.md) — CPU bake-off (D18) |
-| reference | [PLAN.md](../PLAN.md) — decisions D1–D22 |
+| reference | [PLAN.md](../PLAN.md) — decisions D1–D21 |
 Decisions the public face must name: **D3** SearXNG compose, **D6** Go service /
 Python write sidecar, **D14** `bin/{subject}/{method}.go`, **D15** Gitea origin,
 **D17** assertion gate (facts → info → web), **D18** pluggable reasoner.
 Search: `bin/brain/search.go "query"` (HTTP: `bin/brain/serve.go` —
-`/health` `/search` `/get` `/stats` `/audit` `/ingest`). `--hop N` walks
+`/health` `/search` `/get` `/stats` `/audit` `/ingest`). `--hop` is
-`FROM_FILE` → Commit → Person from each hit (max 3). Rebuild writes
+not a walk; the flag errors. Schema has `FROM_FILE`; search does not
-File edges ([#17](https://git.produktor.io/eSlider/2dph/issues/17)).
+use it ([#17](https://git.produktor.io/eSlider/2dph/issues/17)).
 Work board: [Gitea issues](https://git.produktor.io/eSlider/2dph/issues)
 ([epic #16](https://git.produktor.io/eSlider/2dph/issues/16)).
@@ -21,5 +21,4 @@ OO_CLI                     (default: $HOME/go/bin/oo)
 ./bin/chats/apply.go --dry-run
 ```
-JSONL → markdown only. Brain ingest is `bin/brain/index.go --with-chats`
+JSONL → markdown only. Brain ingest is `bin/brain/index.go` (not a `chats index`).
 (default `var/chats/md`). WhatsApp sync is out of v1.
@@ -34,9 +34,9 @@ bin/brain/search.go "question"
     is not evidence of absence; `--no-web` / `--root` skip it)
 ```
-`--hop N` walks `Leaf-[:FROM_FILE]->File-[:HAS_VERSION]->Commit-[:AUTHORED]->Person`
+`--hop` is not implemented. `FROM_FILE` / `HAS_VERSION` exist in schema;
-from each hit (1=File, 2=Commit, 3=Person). Rebuild writes FROM_FILE;
+search does not walk them ([#17](https://git.produktor.io/eSlider/2dph/issues/17)).
-git import writes HAS_VERSION/AUTHORED ([#17](https://git.produktor.io/eSlider/2dph/issues/17)).
+The flag is an error; it is not a graph walk.
 ## Who / What / How / Where / When + evidence
@@ -80,16 +80,14 @@ Conflicting pairings (≥2 yes vs ≥2 no) = hypothesis (OQ1 → v2 resolution).
 They do not exec Python. Control questions for recall@5 live in
 `internal/brain/rank` so CI can test the table without libladybug.
 Python `bin/kb/{get,stats,eval}` remain for GitHub Actions until the runner
-fetches Zig + libs (`bin/cgo/zig`). Incremental write is `bin/kb/add`
+fetches Zig + libs (`bin/cgo/zig`). Index/write is still `bin/kb/index`
 (`bin/brain/add.go`). Bulk index/write is still `bin/kb/index`
 (`docker compose --profile index`).
 ## Agent API (D20)
 `bin/brain/serve.go` exposes the same `internal/httpapi.Ops` table as OpenAPI
 (`GET /openapi.json`) and MCP (`POST /mcp` JSON-RPC `tools/list` +
-`tools/call`). Tool names match paths: `search`, `get`, `stats`, `audit`,
+`tools/call`). Tool names match paths: `search`, `get`, `stats`, `audit`.
 `ingest` (add a leaf; omit body for the CLI hint).
 Agents should use these endpoints instead of shebang CLIs.
 ## Reasoner (D18)
@@ -100,5 +98,5 @@ CPU sidecar: compose profile `reasoner` (`OLLAMA_NUM_GPU=0`,
 `127.0.0.1:11435`). Bake-off: `bin/reasoner/bakeoff.go`. Weights stay out
 of the 2dph image. See [docs/reasoner.md](reasoner.md).
-Gap to v1 (hops, corpus, CI eval): [roadmap](roadmap.md),
+Gap to v1 (write, hops, corpus, agent loop): [roadmap](roadmap.md),
 [epic #16](https://git.produktor.io/eSlider/2dph/issues/16).
@@ -1,34 +1,18 @@
 # PicoClaw profile (reference agent)
-2dph is the memory/fact gate. Compose profile `picoclaw` runs the official
+2dph is the memory/fact gate. PicoClaw (or any MCP client) is the agent loop
-PicoClaw gateway (`docker.io/sipeed/picoclaw:v0.3.1`) plus `brain-mcp` and the
+and is **not** shipped in this repo.
 CPU reasoner. Default agent model is `qwen3.5:9b` (RAM path, D18). Weights stay
 in the reasoner volume, not in the 2dph image.
 No secrets in git: Ollama needs no key; MCP is local HTTP.
 ```bash
-docker compose --profile picoclaw up -d
+docker compose --profile picoclaw up brain-mcp
 # already serving :8630 / :11435:
 docker compose --profile picoclaw up -d --no-deps picoclaw
 ```
-Gateway: `127.0.0.1:18790`. Brain MCP: `http://127.0.0.1:8630/mcp`.
+The API listens on `127.0.0.1:8630`. Point the agent at
-Cursor-style clients can use [deploy/picoclaw/mcp.json.example](../deploy/picoclaw/mcp.json.example).
+`http://127.0.0.1:8630/mcp` using [deploy/picoclaw/mcp.json.example](../deploy/picoclaw/mcp.json.example).
 PicoClaw itself uses [deploy/picoclaw/config.json](../deploy/picoclaw/config.json)
 (`127.0.0.1` + host network — loopback publishes are not reachable via docker0).
 OpenAPI: `GET http://127.0.0.1:8630/openapi.json`.
 Before a factual reply: `search` → `get` → `audit`. `throttled` is not a
 negative finding. See `skills/picoclaw/SKILL.md`.
-System performance (MCP gates + qwen3.5:9b tool_call + PicoClaw gateway):
+No Cursor required. A live PicoClaw binary/image is an operator choice.
 ```bash
 ./qa/system_perf.py --json | yq '.gates'
 REASONER_MODEL=qwen3.5:9b ./qa/system_perf.py --reasoner --picoclaw --json | yq '.reasoner'
 ```
 The default agent model is `qwen3.5:9b`. PicoClaw `context_window` is 8192
 (heuristic `max_tokens*4` at 512 is 2048, too small for MCP tool schemas).
 `request_timeout` is 600s for a CPU turn (tool_call + MCP search + answer).
@@ -1,8 +1,8 @@
 # Reasoner bake-off (D18)
 Pluggable OpenAI-compatible URL. 2dph does not ship weights. PicoClaw is
-compose profile `picoclaw` (`sipeed/picoclaw`); the bake-off hits the same
+not in this repo; the bake-off hits the same tool names PicoClaw would
-tool names (`search` → `get` → `audit` from `internal/httpapi.Ops`).
+(`search` → `get` → `audit` from `internal/httpapi.Ops`).
 ```bash
 docker compose --profile reasoner up -d reasoner
@@ -11,8 +11,6 @@ REASONER_BASE_URL=http://127.0.0.1:11435/v1 REASONER_MODEL=qwen3.5:9b \
  ./bin/reasoner/bakeoff.go --json
 ```
 JSON includes `latency_p50_ms` / `latency_p95_ms` from DuckDB (`internal/duckstats`, D22).
 Host Ollama on `:11434` is left alone. This sidecar binds `127.0.0.1:11435`
 with `OLLAMA_NUM_GPU=0` (CPU). Measure RSS (`/api/ps` `size`), not VRAM.
@@ -23,44 +23,45 @@ Decisions: [PLAN.md](../PLAN.md).
 Read path Go + Zig CGO (D21). HTTP + OpenAPI + MCP (D20). PicoClaw compose
 profile + CPU reasoner (D18). Mail sync → import → rebuild. D14 shebangs.
 Compose `api` (no CPython) / `index` (Python write). Issues #1–#5, #7–#13.
 [#15](https://git.produktor.io/eSlider/2dph/issues/15) lever/loop.
 [#14](https://git.produktor.io/eSlider/2dph/issues/14) `bin/brain/add.go` /
 `POST /ingest` (Python `kblib.add_leafs`; no Go upsert port).
 [#17](https://git.produktor.io/eSlider/2dph/issues/17) `--hop N` walks
 FROM_FILE / HAS_VERSION / AUTHORED.
 [#18](https://git.produktor.io/eSlider/2dph/issues/18) `--with-facts` /
 `--with-chats` on rebuild (WhatsApp out of v1).
 [#19](https://git.produktor.io/eSlider/2dph/issues/19) CI recall SoT =
 `bin/brain/eval.go` via Zig.
 Epic [#16](https://git.produktor.io/eSlider/2dph/issues/16) closed.
-## v2
+`POST /ingest` is a rebuild **hint**. `add` is not implemented.
 [#6](https://git.produktor.io/eSlider/2dph/issues/6) OCR — **in**.
 [#30](https://git.produktor.io/eSlider/2dph/issues/30) OQ3 duckdb-go — **in**.
 [#29](https://git.produktor.io/eSlider/2dph/issues/29) OQ1 contradiction
 resolution.
 ## Blockers
 None for epic #16 (closed). Remaining v2: OQ1, OQ4.
 ```
 question
    │
    ├─ FTS + HNSW          ← in
    ├─ facts / info roots  ← in
    ├─ web (D17)           ← in
-    ├─ brain/add ACID      ← in
+    ├─ Cypher hop          ← #17  schema yes, search no
-    ├─ Cypher hop          ← in
+    ├─ brain/add ACID      ← #14  rebuild only
-    └─ facts+chats corpus  ← in
+    └─ facts+chats corpus  ← #18
 ```
 1. **[#14](https://git.produktor.io/eSlider/2dph/issues/14) write** —
   `bin/brain/index.go --rebuild` (Python `kblib`). No incremental
   `brain/add`. Watch/mail/git cannot become facts “now”.
 2. **[#17](https://git.produktor.io/eSlider/2dph/issues/17) hops** —
   `Leaf-[:FROM_FILE]->File-[:HAS_VERSION]->Commit-[:AUTHORED]->Person`
   exists; `--hop` still errors. Without a walk, D9/D10 are paper.
 3. **[#18](https://git.produktor.io/eSlider/2dph/issues/18) corpus** —
   rebuild loads repo markdown + mail as `info`. `facts/extract` pairing
   and `bin/chats` are not indexed. WhatsApp is a stub. PII stays in `var/`.
 4. **[#15](https://git.produktor.io/eSlider/2dph/issues/15) lever/loop** —
   2dph is the lever (`search` → `get` → `audit`). PicoClaw is the loop.
   Document the contour in-repo; CPU turns need a large context window.
 5. **[#19](https://git.produktor.io/eSlider/2dph/issues/19) CI eval** —
   recall SoT should be `bin/brain/eval.go` via Zig, not Python `bin/kb/eval`.
 ## Not v1
-OQ1 contradiction resolution, OQ4 YAML-first leafs.
+[#6](https://git.produktor.io/eSlider/2dph/issues/6) OCR (OQ2), OQ1
-OCR (OQ2) and duckdb-go (OQ3/D22) are in.
+contradiction resolution, OQ3 duckdb-md export, OQ4 YAML-first leafs.
 ## Close epic #16 when
-Children #14, #15, #17, #18, #19 are closed. MCP tool order stays gated by tests.
+- facts+info can be written without a full rebuild for every leaf
 - `--hop` stops erroring and runs a Cypher path from search hits
 - ops pairing + chat import land as leafs on rebuild
 - MCP tool order is documented and still gated by tests
@@ -16,7 +16,6 @@ No laptop-absolute paths. Config lives in env files under `$HOME/.config/brain/`
 - Go (see `go.mod`)
 - Python 3.12 + [uv](https://docs.astral.sh/uv)
 - Optional: Docker, Zig CGO via `bin/cgo/zig` (not gcc)
 - Optional: poppler (`pdftotext`/`pdftoppm`) + tesseract `eng+deu` for mail OCR
 ```bash
 uv venv .venv
@@ -44,20 +43,18 @@ That binds `127.0.0.1:8888`. JSON format must stay enabled.
 ## Index then search
-Write path is `bin/brain/add.go` for a leaf (or `POST /ingest`). Bulk
+Write path is Compose profile `index` (Python Ladybug rebuild) until
-corpus rebuild remains `bin/brain/index.go --rebuild` (Compose profile
+`brain/add` is v2. The operator command is `bin/brain/index.go`.
 `index`). Do not DROP INDEX on Ladybug 0.19.
 ```bash
-bin/brain/add.go --text "arc-1 runs Matrix" --root facts --source "compose.yml x docker ps"
+bin/brain/index.go --rebuild
 bin/brain/index.go --rebuild --with-facts --with-chats
 bin/brain/search.go "LadybugDB vector index"     # facts → info → web (D17)
 bin/brain/search.go "upstream flag" --no-web
 bin/brain/get.go <id> --body
 bin/brain/stats.go
 ```
-`--hop N` walks File → Commit → Person from each hit. Empty web results are `throttled`, not absence.
+`--hop` is not implemented. Empty web results are `throttled`, not absence.
 Gap to v1: [roadmap](roadmap.md) / [epic #16](https://git.produktor.io/eSlider/2dph/issues/16).
 Ladybug 0.19: never `DROP INDEX` FTS/VECTOR (ghost catalog). Fresh indexes =
@@ -7,7 +7,6 @@ require (
 	github.com/arran4/golang-ical v0.3.5
 	github.com/chewxy/math32 v1.11.2
 	github.com/daulet/tokenizers v1.27.0
 	github.com/duckdb/duckdb-go/v2 v2.10505.0
 	github.com/go-git/go-git/v5 v5.19.2
 	golang.org/x/sys v0.47.0
 	golang.org/x/text v0.40.0
@@ -21,17 +20,10 @@ require (
 	github.com/apache/arrow-go/v18 v18.6.0 // indirect
 	github.com/cloudflare/circl v1.6.3 // indirect
 	github.com/cyphar/filepath-securejoin v0.6.1 // indirect
 	github.com/duckdb/duckdb-go-bindings v0.10505.0 // indirect
 	github.com/duckdb/duckdb-go-bindings/lib/darwin-amd64 v0.10505.0 // indirect
 	github.com/duckdb/duckdb-go-bindings/lib/darwin-arm64 v0.10505.0 // indirect
 	github.com/duckdb/duckdb-go-bindings/lib/linux-amd64 v0.10505.0 // indirect
 	github.com/duckdb/duckdb-go-bindings/lib/linux-arm64 v0.10505.0 // indirect
 	github.com/duckdb/duckdb-go-bindings/lib/windows-amd64 v0.10505.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
 	github.com/go-git/go-billy/v5 v5.9.0 // indirect
 	github.com/go-viper/mapstructure/v2 v2.5.0 // indirect
 	github.com/goccy/go-json v0.10.6 // indirect
 	github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect
 	github.com/google/flatbuffers v25.12.19+incompatible // indirect
@@ -31,20 +31,6 @@ github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/duckdb/duckdb-go-bindings v0.10505.0 h1:/0pPsTLrcCsTGxT0VrHgJWnOcPe1tQL1vrki1v3jbAI=
 github.com/duckdb/duckdb-go-bindings v0.10505.0/go.mod h1:HoD5xePkDj3VZbBnVVfxVVYIljZ9khCprWA7FgwIiC4=
 github.com/duckdb/duckdb-go-bindings/lib/darwin-amd64 v0.10505.0 h1:FrMqquFBQlMsi34h2KZgCku54rqA8xEbXZ0NLVDKwYs=
 github.com/duckdb/duckdb-go-bindings/lib/darwin-amd64 v0.10505.0/go.mod h1:EnAvZh1kNJHp5yF+M1ZHNEvapnmt6anq1xXHVrAGqMo=
 github.com/duckdb/duckdb-go-bindings/lib/darwin-arm64 v0.10505.0 h1:lbRbpQwT1MmUhh/VTwukV9K8bxKByV3UghAP3MvsbBo=
 github.com/duckdb/duckdb-go-bindings/lib/darwin-arm64 v0.10505.0/go.mod h1:IGLSeEcFhNeZF16aVjQCULD7TsFZKG5G7SyKJAXKp5c=
 github.com/duckdb/duckdb-go-bindings/lib/linux-amd64 v0.10505.0 h1:nrsaVYj3XYCRbS2FpdOMD/KHE7egRMr+/NR1IHmjT84=
 github.com/duckdb/duckdb-go-bindings/lib/linux-amd64 v0.10505.0/go.mod h1:KAIynZ0GHCS7X5fRyuFnQMg/SZBPK/bS9OCOVojClxw=
 github.com/duckdb/duckdb-go-bindings/lib/linux-arm64 v0.10505.0 h1:qM6oGDgwXBILJGbTY4fCy6QOczLpucUA6yn6g3ORjh4=
 github.com/duckdb/duckdb-go-bindings/lib/linux-arm64 v0.10505.0/go.mod h1:81SGOYoEUs8qaAfSk1wRfM5oobrIJ5KI7AzYhK6/bvQ=
 github.com/duckdb/duckdb-go-bindings/lib/windows-amd64 v0.10505.0 h1:DjqZl9rYreHkSOqnqLmkrqH5T8UdQNcxZLJVZzGmXXA=
 github.com/duckdb/duckdb-go-bindings/lib/windows-amd64 v0.10505.0/go.mod h1:K25pJL26ARblGDeuAkrdblFvUen92+CwksLtPEHRqqQ=
 github.com/duckdb/duckdb-go/v2 v2.10505.0 h1:SWwvLn2Qx/RQSnQNupwgIF8VbnJ5A6OQU9lYb/mDETI=
 github.com/duckdb/duckdb-go/v2 v2.10505.0/go.mod h1:m0PW4J4FG9hlFlVdXi6Ds9owpyIDaBdE2jyce00fGcE=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/elazarl/goproxy v1.7.2 h1:Y2o6urb7Eule09PjlhQRGNsqRfPmYI3KKQLFpCAV3+o=
@@ -61,8 +47,6 @@ github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399 h1:eMj
 github.com/go-git/go-git-fixtures/v4 v4.3.2-0.20231010084843-55a94097c399/go.mod h1:1OCfN199q1Jm3HZlxleg+Dw/mwps2Wbk9frAWm+4FII=
 github.com/go-git/go-git/v5 v5.19.2 h1:wkfn7vOlUBu8ivAWKBWisTiwJK4jYHzTF8Ndv1LyGqY=
 github.com/go-git/go-git/v5 v5.19.2/go.mod h1:QqCBE1EFN5ddFmrliLQ3/ntRCUjZU3EJuwuB/jWEHjk=
 github.com/go-viper/mapstructure/v2 v2.5.0 h1:vM5IJoUAy3d7zRSVtIwQgBj7BiWtMPfmPEgAXnvj1Ro=
 github.com/go-viper/mapstructure/v2 v2.5.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
 github.com/goccy/go-json v0.10.6 h1:p8HrPJzOakx/mn/bQtjgNjdTcN+/S6FcG2CTtQOrHVU=
 github.com/goccy/go-json v0.10.6/go.mod h1:oq7eo15ShAhp70Anwd5lgX2pLfOS3QCiwU/PULtXL6M=
 github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 h1:f+oWsMOmNPc8JmEHVZIycC7hBoQxHH9pNKQORJNozsQ=
@@ -7,8 +7,6 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
 	"os/exec"
 	"path/filepath"
 	"github.com/eSlider/2dph/internal/brain/rank"
 )
@@ -139,22 +137,12 @@ func (HTTP) Audit(context.Context) ([]byte, error) {
 	return json.Marshal(map[string]any{"status": "ok", "by_confidence": rows})
 }
-func (HTTP) Ingest(ctx context.Context, body []byte) ([]byte, error) {
+func (HTTP) Ingest(context.Context) ([]byte, error) {
 	if len(bytes.TrimSpace(body)) == 0 {
 	return json.Marshal(map[string]any{
-			"mode":    "add",
+		"mode":    "rebuild",
-			"command": "bin/brain/add.go",
+		"command": "bin/brain/index.go --rebuild",
-			"rebuild": "bin/brain/index.go --rebuild",
+		"add":     "v2",
 	})
 	}
 	cmd := exec.CommandContext(ctx, filepath.Join(repoRoot(), "bin", "kb", "add"), "--json")
 	cmd.Stdin = bytes.NewReader(body)
 	cmd.Dir = repoRoot()
 	out, err := cmd.Output()
 	if err != nil {
 		return nil, fmt.Errorf("add: %w", err)
 	}
 	return out, nil
 }
 func asInt(v any) int64 {
@@ -6,7 +6,7 @@ import (
 	"strings"
 )
-const Usage = `usage: bin/brain/search.go "query" [--root facts|info] [--repo REPO] [-n N] [--hop N] [--json] [--no-web]
+const Usage = `usage: bin/brain/search.go "query" [--root facts|info] [--repo REPO] [-n N] [--json] [--no-web]
       bin/brain/search.go serve [port]
       bin/brain/search.go --list-model`
@@ -15,7 +15,6 @@ type Options struct {
 	Root      string
 	Repo      string
 	Limit     int
 	Hop       int
 	JSONOut   bool
 	ListModel bool
 	NoWeb     bool
@@ -23,6 +22,8 @@ type Options struct {
 // ParseArgs reads flags. Unknown flags are an error: silently dropping them
 // meant `--hop 1` vanished and its argument `1` was appended to the query.
 // --hop is recognised so it cannot be swallowed; it is not implemented until
 // File/FROM_FILE edges exist.
 func ParseArgs(args []string) (Options, error) {
 	opt := Options{Limit: 20}
 	var queryArgs []string
@@ -51,15 +52,7 @@ func ParseArgs(args []string) (Options, error) {
 			}
 			opt.Limit = n
 		case "--hop":
-			i++
+			return opt, fmt.Errorf("--hop is not implemented yet (needs File/FROM_FILE edges)")
 			n, err := strconv.Atoi(args[i])
 			if err != nil || n < 1 {
 				return opt, fmt.Errorf("--hop must be a positive integer, got %q", args[i])
 			}
 			if n > 3 {
 				return opt, fmt.Errorf("--hop max is 3 (File → Commit → Person)")
 			}
 			opt.Hop = n
 		case "--json":
 			opt.JSONOut = true
 		case "--no-web":
@@ -7,30 +7,3 @@ const FTSStmt = "CALL QUERY_FTS_INDEX('Leaf', 'id', $q) " +
 const VecStmt = "CALL QUERY_VECTOR_INDEX('Leaf', 'Leaf_vec', $q, $n) " +
 	"RETURN node.id, node.text, node.root, node.source, distance ORDER BY distance LIMIT $n"
 // HopStmt is the Cypher walk from a search hit. Depth 1 = File, 2 = Commit, 3 = Person.
 func HopStmt(depth int) string {
 	switch depth {
 	case 1:
 		return "MATCH (l:Leaf {id:$id})-[:FROM_FILE]->(f:File) RETURN f.id, f.path, 1"
 	case 2:
 		return "MATCH (l:Leaf {id:$id})-[:FROM_FILE]->(f:File)-[:HAS_VERSION]->(c:Commit) RETURN c.id, c.subject, 2"
 	case 3:
 		return "MATCH (l:Leaf {id:$id})-[:FROM_FILE]->(f:File)-[:HAS_VERSION]->(c:Commit)-[:AUTHORED]->(p:Person) RETURN p.id, p.name, 3"
 	default:
 		return ""
 	}
 }
 func HopLabel(depth int) string {
 	switch depth {
 	case 1:
 		return "File"
 	case 2:
 		return "Commit"
 	case 3:
 		return "Person"
 	default:
 		return ""
 	}
 }
@@ -7,13 +7,6 @@ import (
 	"strings"
 )
 type HopNode struct {
 	ID    string `json:"id"`
 	Label string `json:"label"`
 	Name  string `json:"name"`
 	Depth int    `json:"depth"`
 }
 // Hit is one search result, mirroring the python script's dict shape.
 type Hit struct {
 	ID      string  `json:"id"`
@@ -22,7 +15,6 @@ type Hit struct {
 	Source  string  `json:"-"`
 	Score   float64 `json:"score"`
 	Snippet string  `json:"snippet,omitempty"`
 	Hops    []HopNode `json:"hops,omitempty"`
 }
 // rrfK dampens the contribution of low ranks; same constant as kblib.py.
@@ -91,41 +91,15 @@ func TestHybridKeepsVectorScoreForSharedHit(t *testing.T) {
 }
 // The old parser dropped unknown flags and appended their arguments to the
-// query, so `search "q" --hop 1` searched for "q 1". --hop must stay a flag.
+// query, so `search "q" --hop 1` searched for "q 1". --hop is not implemented
 // here (needs File edges); it must still fail closed instead of changing q.
 func TestParseHopIsNotSwallowedIntoTheQuery(t *testing.T) {
-	opt, err := ParseArgs([]string{"what runs on arc-2", "--hop", "1"})
+	_, err := ParseArgs([]string{"what runs on arc-2", "--hop", "1"})
-	if err != nil {
+	if err == nil {
-		t.Fatalf("unexpected error: %v", err)
+		t.Fatal("expected --hop to error (not implemented), not be swallowed")
 	}
-	if opt.Query != "what runs on arc-2" {
+	if !strings.Contains(err.Error(), "--hop") {
-		t.Fatalf("query swallowed hop arg: %q", opt.Query)
+		t.Fatalf("error should name --hop, got %v", err)
 	}
 	if opt.Hop != 1 {
 		t.Fatalf("hop = %d, want 1", opt.Hop)
 	}
 }
 func TestParseHopMaxIsThree(t *testing.T) {
 	if _, err := ParseArgs([]string{"q", "--hop", "4"}); err == nil {
 		t.Fatal("expected --hop 4 to error")
 	}
 	opt, err := ParseArgs([]string{"q", "--hop", "3"})
 	if err != nil || opt.Hop != 3 {
 		t.Fatalf("hop 3: %+v err=%v", opt, err)
 	}
 }
 func TestHopStmtWalksFromFile(t *testing.T) {
 	s := HopStmt(1)
 	if !strings.Contains(s, "FROM_FILE") || !strings.Contains(s, "File") {
 		t.Fatalf("hop 1 must walk FROM_FILE, got %q", s)
 	}
 	s3 := HopStmt(3)
 	if !strings.Contains(s3, "HAS_VERSION") || !strings.Contains(s3, "AUTHORED") || !strings.Contains(s3, "Person") {
 		t.Fatalf("hop 3 must reach Person, got %q", s3)
 	}
 	if HopLabel(1) != "File" || HopLabel(3) != "Person" {
 		t.Fatal("hop labels")
 	}
 }
@@ -56,12 +56,6 @@ func runSearch(args []string) int {
 		fmt.Fprintf(os.Stderr, "search: %v\n", err)
 		return 1
 	}
 	if opt.Hop > 0 {
 		if err := attachHops(hits, opt.Hop); err != nil {
 			fmt.Fprintf(os.Stderr, "hop: %v\n", err)
 			return 1
 		}
 	}
 	results := hits
 	for i := range results {
@@ -114,44 +108,6 @@ func searchHits(query, root, repo string, limit int) ([]Hit, error) {
 	return rank.RankAndFilter(fts, vec, root, repo, limit), nil
 }
 func attachHops(hits []Hit, n int) error {
 	if conn == nil {
 		return fmt.Errorf("brain not open")
 	}
 	for i := range hits {
 		var hops []rank.HopNode
 		for d := 1; d <= n; d++ {
 			stmt, err := conn.Prepare(rank.HopStmt(d))
 			if err != nil {
 				return err
 			}
 			res, err := conn.Execute(stmt, map[string]any{"id": hits[i].ID})
 			stmt.Close()
 			if err != nil {
 				return err
 			}
 			for res.HasNext() {
 				row, err := res.Next()
 				if err != nil {
 					return err
 				}
 				vals, err := row.GetAsSlice()
 				if err != nil || len(vals) < 3 {
 					continue
 				}
 				hops = append(hops, rank.HopNode{
 					ID:    fmt.Sprint(vals[0]),
 					Label: rank.HopLabel(d),
 					Name:  fmt.Sprint(vals[1]),
 					Depth: int(asInt(vals[2])),
 				})
 			}
 		}
 		hits[i].Hops = hops
 	}
 	return nil
 }
 func b2i(err error) int {
 	if err != nil {
 		return 1
@@ -232,7 +188,6 @@ type jsonHit struct {
 	Root    string  `json:"root"`
 	Score   float64 `json:"score"`
 	Snippet string  `json:"snippet,omitempty"`
 	Hops    []rank.HopNode `json:"hops,omitempty"`
 }
 func toJSONOut(hits []Hit, query, rootFilter string, web *rank.SecondSource) *jsonOut {
@@ -244,7 +199,6 @@ func toJSONOut(hits []Hit, query, rootFilter string, web *rank.SecondSource) *js
 			Root:    h.Root,
 			Score:   h.Score,
 			Snippet: h.Snippet,
 			Hops:    h.Hops,
 		}
 	}
 	return &jsonOut{
@@ -268,18 +222,6 @@ func resultsToDicts(hits []Hit) []any {
 		if h.Snippet != "" {
 			d = append(d, KV{"snippet", h.Snippet})
 		}
 		if len(h.Hops) > 0 {
 			nodes := make([]any, len(h.Hops))
 			for j, n := range h.Hops {
 				nodes[j] = Dict{
 					{"id", n.ID},
 					{"label", n.Label},
 					{"name", n.Name},
 					{"depth", n.Depth},
 				}
 			}
 			d = append(d, KV{"hops", nodes})
 		}
 		out[i] = d
 	}
 	return out
@@ -1,47 +0,0 @@
 // Package duckstats runs in-process DuckDB for columnar aggregates.
 // Graph facts stay in Ladybug. Web-search KV cache stays modernc sqlite.
 package duckstats
 import (
 	"database/sql"
 	"fmt"
 	_ "github.com/duckdb/duckdb-go/v2"
 )
 type Stats struct {
 	N   int     `json:"n"`
 	Min float64 `json:"min"`
 	P50 float64 `json:"p50"`
 	P95 float64 `json:"p95"`
 	Max float64 `json:"max"`
 	Avg float64 `json:"avg"`
 }
 func Quantiles(samples []float64) (Stats, error) {
 	if len(samples) == 0 {
 		return Stats{}, fmt.Errorf("duckstats: empty samples")
 	}
 	db, err := sql.Open("duckdb", "")
 	if err != nil {
 		return Stats{}, err
 	}
 	defer db.Close()
 	var s Stats
 	err = db.QueryRow(`
 SELECT count(v), min(v), quantile_cont(v, 0.5), quantile_cont(v, 0.95), max(v), avg(v)
 FROM (SELECT unnest(?) AS v)`, samples).Scan(
 		&s.N, &s.Min, &s.P50, &s.P95, &s.Max, &s.Avg)
 	return s, err
 }
 func CountJSONL(path string) (int64, error) {
 	db, err := sql.Open("duckdb", "")
 	if err != nil {
 		return 0, err
 	}
 	defer db.Close()
 	var n int64
 	err = db.QueryRow(`SELECT count(*) FROM read_json_auto(?)`, path).Scan(&n)
 	return n, err
 }
@@ -1,51 +0,0 @@
 package duckstats
 import (
 	"os"
 	"testing"
 )
 func TestQuantilesEmpty(t *testing.T) {
 	_, err := Quantiles(nil)
 	if err == nil {
 		t.Fatal("empty slice must error")
 	}
 }
 func TestQuantilesOdd(t *testing.T) {
 	s, err := Quantiles([]float64{1, 2, 3, 4, 5})
 	if err != nil {
 		t.Fatal(err)
 	}
 	if s.N != 5 {
 		t.Fatalf("n=%d", s.N)
 	}
 	if s.Min != 1 || s.Max != 5 {
 		t.Fatalf("min=%v max=%v", s.Min, s.Max)
 	}
 	if s.P50 != 3 {
 		t.Fatalf("p50=%v want 3", s.P50)
 	}
 	if s.Avg != 3 {
 		t.Fatalf("avg=%v want 3", s.Avg)
 	}
 	if s.P95 < 4.5 || s.P95 > 5 {
 		t.Fatalf("p95=%v want in [4.5,5]", s.P95)
 	}
 }
 func TestCountJSONL(t *testing.T) {
 	dir := t.TempDir()
 	p := dir + "/rows.jsonl"
 	body := "{\"ms\":1}\n{\"ms\":2}\n{\"ms\":3}\n"
 	if err := os.WriteFile(p, []byte(body), 0o600); err != nil {
 		t.Fatal(err)
 	}
 	n, err := CountJSONL(p)
 	if err != nil {
 		t.Fatal(err)
 	}
 	if n != 3 {
 		t.Fatalf("count=%d want 3", n)
 	}
 }
@@ -144,15 +144,7 @@ func (s *Server) mcpCall(r *http.Request, params json.RawMessage) (any, error) {
 			return nil, fmt.Errorf("cancelled")
 		}
 		defer s.release()
-		var payload []byte
+		body, err = s.api.Ingest(r.Context())
 		text := strings.TrimSpace(fmt.Sprint(p.Arguments["text"]))
 		if text != "" && text != "<nil>" {
 			payload, err = json.Marshal(p.Arguments)
 			if err != nil {
 				return nil, err
 			}
 		}
 		body, err = s.api.Ingest(r.Context(), payload)
 	default:
 		return nil, fmt.Errorf("unknown tool %s", p.Name)
 	}
@@ -11,7 +11,6 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
 	"io"
 	"log"
 	"net/http"
 	"os"
@@ -28,7 +27,7 @@ type API interface {
 	Get(ctx context.Context, id string, body bool) ([]byte, error)
 	Stats(ctx context.Context) ([]byte, error)
 	Audit(ctx context.Context) ([]byte, error)
-	Ingest(ctx context.Context, body []byte) ([]byte, error)
+	Ingest(ctx context.Context) ([]byte, error)
 }
 type Server struct {
@@ -60,7 +59,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	case PathAudit:
 		s.handleJSON(w, r, s.api.Audit)
 	case PathIngest:
-		s.handleIngest(w, r)
+		s.handleJSON(w, r, s.api.Ingest)
 	case PathOpenAPI:
 		s.handleOpenAPI(w, r)
 	case PathMCP:
@@ -117,24 +116,6 @@ func (s *Server) handleJSON(w http.ResponseWriter, r *http.Request, fn func(cont
 	writeAPI(w, body, err)
 }
 func (s *Server) handleIngest(w http.ResponseWriter, r *http.Request) {
 	var raw []byte
 	if r.Method == http.MethodPost {
 		b, err := io.ReadAll(io.LimitReader(r.Body, 1<<20))
 		if err != nil {
 			writeJSON(w, http.StatusBadRequest, map[string]any{"error": "read body"})
 			return
 		}
 		raw = b
 	}
 	if !s.acquire(w, r) {
 		return
 	}
 	defer s.release()
 	body, err := s.api.Ingest(r.Context(), raw)
 	writeAPI(w, body, err)
 }
 func (s *Server) tryAcquire(r *http.Request) bool {
 	return s.acquire(nopWriter{}, r)
 }
@@ -210,30 +191,11 @@ func (ExecSearcher) Get(context.Context, string, bool) ([]byte, error) {
 }
 func (ExecSearcher) Stats(context.Context) ([]byte, error) { return nil, errUnimplemented }
 func (ExecSearcher) Audit(context.Context) ([]byte, error) { return nil, errUnimplemented }
-func (b ExecSearcher) Ingest(ctx context.Context, body []byte) ([]byte, error) {
+func (ExecSearcher) Ingest(context.Context) ([]byte, error) {
 	if len(strings.TrimSpace(string(body))) == 0 {
 	return json.Marshal(map[string]any{
-			"mode":    "add",
+		"mode":    "rebuild",
-			"command": "bin/brain/add.go",
+		"command": "bin/brain/index.go --rebuild",
 			"rebuild": "bin/brain/index.go --rebuild",
 	})
 	}
 	root := os.Getenv("KB_ROOT")
 	if root == "" {
 		root = "."
 	}
 	cmd := exec.CommandContext(ctx, filepath.Join(root, "bin/kb/add"), "--json")
 	cmd.Stdin = strings.NewReader(string(body))
 	cmd.Dir = root
 	out, err := cmd.Output()
 	if err != nil {
 		var exitErr *exec.ExitError
 		if errors.As(err, &exitErr) {
 			return nil, errors.New("add failed: " + strings.TrimSpace(string(exitErr.Stderr)))
 		}
 		return nil, err
 	}
 	return out, nil
 }
 func defaultSearchCmd(root string) string {
@@ -1,7 +1,6 @@
 package httpapi
 import (
 	"bytes"
 	"context"
 	"encoding/json"
 	"net/http"
@@ -65,11 +64,8 @@ func (f *fakeSearcher) Audit(context.Context) ([]byte, error) {
 	return []byte(`{"status":"ok"}`), nil
 }
-func (f *fakeSearcher) Ingest(_ context.Context, body []byte) ([]byte, error) {
+func (f *fakeSearcher) Ingest(context.Context) ([]byte, error) {
-	if len(bytes.TrimSpace(body)) == 0 {
+	return []byte(`{"mode":"rebuild","command":"bin/brain/index.go --rebuild"}`), nil
 		return []byte(`{"mode":"add","command":"bin/brain/add.go"}`), nil
 	}
 	return []byte(`{"mode":"add","ids":["fake-leaf"]}`), nil
 }
 func (f *fakeSearcher) count() int {
@@ -197,27 +193,6 @@ func TestStatsAuditIngest(t *testing.T) {
 	}
 }
 func TestIngestIsAddNotRebuildHint(t *testing.T) {
 	h := NewServer(&fakeSearcher{}, 1)
 	code, body := get(t, h, "/ingest")
 	if code != http.StatusOK {
 		t.Fatalf("GET /ingest code = %d body=%s", code, body)
 	}
 	if strings.Contains(string(body), `"add":"v2"`) || strings.Contains(string(body), "write is v2") {
 		t.Fatalf("GET /ingest still a v2 hint: %s", body)
 	}
 	if !strings.Contains(string(body), "bin/brain/add.go") {
 		t.Fatalf("GET /ingest should name add.go: %s", body)
 	}
 	code, body = postJSON(t, h, "/ingest", `{"text":"hello","root":"info","source":"t"}`)
 	if code != http.StatusOK {
 		t.Fatalf("POST /ingest code = %d body=%s", code, body)
 	}
 	if !strings.Contains(string(body), "fake-leaf") {
 		t.Fatalf("POST /ingest should add: %s", body)
 	}
 }
 func TestHTTPPackageDoesNotExecPython(t *testing.T) {
 	raw, err := os.ReadFile("server.go")
 	if err != nil {
@@ -47,15 +47,7 @@ var Ops = []Op{
 	},
 	{Path: PathStats, Method: "get", ID: "stats", Summary: "index health", MCP: true},
 	{Path: PathAudit, Method: "get", ID: "audit", Summary: "facts confidence histogram", MCP: true},
-	{
+	{Path: PathIngest, Method: "get", ID: "ingest", Summary: "rebuild hint (write is v2)", MCP: true},
 		Path: PathIngest, Method: "post", ID: "ingest", Summary: "add a leaf without rebuild",
 		MCP: true,
 		Params: []Param{
 			{Name: "text", In: "query", Type: "string", Description: "leaf text (omit for CLI hint)"},
 			{Name: "root", In: "query", Type: "string", Description: "facts or info (default info)"},
 			{Name: "source", In: "query", Type: "string", Description: "evidence pointer; facts need two sources"},
 		},
 	},
 	{Path: PathOpenAPI, Method: "get", ID: "openapi", Summary: "OpenAPI 3 document for this server"},
 }
@@ -38,24 +38,11 @@ func TestMCPToolsMatchOpenAPIPaths(t *testing.T) {
 			t.Fatalf("MCP tool %s has no OpenAPI path %s", tool.Name, path)
 		}
 	}
-	for _, need := range []string{"search", "get", "stats", "audit", "ingest"} {
+	for _, need := range []string{"search", "get", "stats", "audit"} {
 		if !names[need] {
 			t.Fatalf("MCP tools missing %s: %v", need, names)
 		}
 	}
 	var ingest MCPTool
 	for _, tool := range tools {
 		if tool.Name == "ingest" {
 			ingest = tool
 			break
 		}
 	}
 	if strings.Contains(ingest.Description, "v2") {
 		t.Fatalf("ingest still a v2 hint: %s", ingest.Description)
 	}
 	if !strings.Contains(ingest.Description, "add") {
 		t.Fatalf("ingest should describe add: %s", ingest.Description)
 	}
 }
 func TestOpenAPIHTTP(t *testing.T) {
@@ -1,162 +0,0 @@
 // Package ocr runs Tesseract (eng+deu) on images and scanned PDFs.
 //
 // Default engine is the tesseract CLI, not gosseract CGO: Ladybug CGO stays
 // Zig-only (D21). Same engine, no gocv. OCR_ENGINE=paddle selects paddleocr
 // when that binary is on PATH (compose profile ocr-paddle).
 package ocr
 import (
 	"fmt"
 	"image"
 	"image/color"
 	"image/png"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"strings"
 )
 const TessLang = "eng+deu"
 func ImageFile(path string) (string, error) {
 	engine := os.Getenv("OCR_ENGINE")
 	if engine == "paddle" {
 		return runPaddle(path)
 	}
 	return runTesseract(path)
 }
 func PDFFile(path string) (string, error) {
 	text, err := pdfToText(path)
 	if err == nil && strings.TrimSpace(text) != "" {
 		return strings.TrimSpace(text), nil
 	}
 	ocr, oerr := pdfPages(path)
 	if oerr != nil {
 		if err != nil {
 			return "", err
 		}
 		return "", oerr
 	}
 	if strings.TrimSpace(ocr) != "" {
 		return strings.TrimSpace(ocr), nil
 	}
 	if text != "" {
 		return strings.TrimSpace(text), nil
 	}
 	return "", fmt.Errorf("pdf has no text layer (ocr unavailable)")
 }
 func pdfToText(path string) (string, error) {
 	cmd := exec.Command("pdftotext", "-layout", path, "-")
 	out, err := cmd.Output()
 	if err != nil {
 		return "", err
 	}
 	return string(out), nil
 }
 func pdfPages(path string) (string, error) {
 	dir, err := os.MkdirTemp("", "2dph-ocr-")
 	if err != nil {
 		return "", err
 	}
 	defer os.RemoveAll(dir)
 	prefix := filepath.Join(dir, "page")
 	cmd := exec.Command("pdftoppm", "-png", "-r", "200", path, prefix)
 	if err := cmd.Run(); err != nil {
 		return "", err
 	}
 	matches, err := filepath.Glob(prefix + "*.png")
 	if err != nil {
 		return "", err
 	}
 	var parts []string
 	for _, img := range matches {
 		t, err := ImageFile(img)
 		if err != nil {
 			continue
 		}
 		if s := strings.TrimSpace(t); s != "" {
 			parts = append(parts, s)
 		}
 	}
 	return strings.Join(parts, "\n\n"), nil
 }
 func runTesseract(path string) (string, error) {
 	pre, err := preprocessFile(path)
 	if err != nil {
 		pre = path
 	} else {
 		defer os.Remove(pre)
 	}
 	cmd := exec.Command("tesseract", pre, "stdout", "-l", TessLang, "--psm", "6")
 	out, err := cmd.Output()
 	if err != nil {
 		return "", err
 	}
 	return strings.TrimSpace(string(out)), nil
 }
 func runPaddle(path string) (string, error) {
 	cmd := exec.Command("paddleocr", "ocr", "-i", path)
 	out, err := cmd.Output()
 	if err != nil {
 		return "", err
 	}
 	return strings.TrimSpace(string(out)), nil
 }
 func preprocessFile(path string) (string, error) {
 	f, err := os.Open(path)
 	if err != nil {
 		return "", err
 	}
 	defer f.Close()
 	img, err := png.Decode(f)
 	if err != nil {
 		return "", err
 	}
 	out := filepath.Join(os.TempDir(), filepath.Base(path)+".gray.png")
 	w, err := os.Create(out)
 	if err != nil {
 		return "", err
 	}
 	defer w.Close()
 	if err := png.Encode(w, GrayContrast(img)); err != nil {
 		os.Remove(out)
 		return "", err
 	}
 	return out, nil
 }
 // GrayContrast is a stdlib preprocess (no gocv): grayscale + stretch.
 func GrayContrast(src image.Image) image.Image {
 	b := src.Bounds()
 	dst := image.NewGray(b)
 	var minL, maxL uint8 = 255, 0
 	for y := b.Min.Y; y < b.Max.Y; y++ {
 		for x := b.Min.X; x < b.Max.X; x++ {
 			g := color.GrayModel.Convert(src.At(x, y)).(color.Gray)
 			if g.Y < minL {
 				minL = g.Y
 			}
 			if g.Y > maxL {
 				maxL = g.Y
 			}
 		}
 	}
 	span := int(maxL) - int(minL)
 	if span < 1 {
 		span = 1
 	}
 	for y := b.Min.Y; y < b.Max.Y; y++ {
 		for x := b.Min.X; x < b.Max.X; x++ {
 			g := color.GrayModel.Convert(src.At(x, y)).(color.Gray)
 			v := uint8((int(g.Y) - int(minL)) * 255 / span)
 			dst.SetGray(x, y, color.Gray{Y: v})
 		}
 	}
 	return dst
 }
@@ -1,54 +0,0 @@
 package ocr
 import (
 	"image"
 	"image/color"
 	"os/exec"
 	"path/filepath"
 	"strings"
 	"testing"
 )
 func TestGrayContrastStretches(t *testing.T) {
 	img := image.NewGray(image.Rect(0, 0, 2, 2))
 	img.SetGray(0, 0, color.Gray{Y: 64})
 	img.SetGray(0, 1, color.Gray{Y: 64})
 	img.SetGray(1, 0, color.Gray{Y: 64})
 	img.SetGray(1, 1, color.Gray{Y: 192})
 	out := GrayContrast(img).(*image.Gray)
 	if out.GrayAt(0, 0).Y != 0 {
 		t.Fatalf("min should map to 0, got %d", out.GrayAt(0, 0).Y)
 	}
 	if out.GrayAt(1, 1).Y != 255 {
 		t.Fatalf("max should map to 255, got %d", out.GrayAt(1, 1).Y)
 	}
 }
 func TestHelloPNGFixtureOCR(t *testing.T) {
 	if _, err := exec.LookPath("tesseract"); err != nil {
 		t.Skip("tesseract not installed")
 	}
 	path := filepath.Join("testdata", "hello.png")
 	got, err := ImageFile(path)
 	if err != nil {
 		t.Fatal(err)
 	}
 	up := strings.ToUpper(got)
 	if !strings.Contains(up, "HELLO") {
 		t.Fatalf("ocr %q missing HELLO", got)
 	}
 }
 func TestPaddleEngineUsesPaddleocrBinary(t *testing.T) {
 	t.Setenv("OCR_ENGINE", "paddle")
 	_, err := ImageFile(filepath.Join("testdata", "hello.png"))
 	if _, look := exec.LookPath("paddleocr"); look != nil {
 		if err == nil {
 			t.Fatal("expected error when paddleocr is missing")
 		}
 		return
 	}
 	if err != nil {
 		t.Fatal(err)
 	}
 }
@@ -113,8 +113,6 @@ type Report struct {
 	XMLLeak    int      `json:"xml_leak"`
 	RSSMB      int      `json:"rss_mb"`
 	VRAMMB     int      `json:"vram_mb"`
 	LatencyP50MS float64  `json:"latency_p50_ms,omitempty"`
 	LatencyP95MS float64  `json:"latency_p95_ms,omitempty"`
 	Prompts    []Result `json:"prompts"`
 }
@@ -6,6 +6,7 @@ readme = "README.md"
 requires-python = ">=3.12"
 license = { text = "MIT" }
 dependencies = [
    "docling>=2.119.0",
    "ladybug==0.19.1",
    "markitdown[docx,epub,html,image-exif,pdf,pptx,xlsx,zip]>=0.1.7",
    "mistune==3.3.4",
@@ -1,257 +0,0 @@
 #!/usr/bin/env python3
 """System performance test: PicoClaw surface (brain MCP) + optional reasoner.
  BRAIN_URL=http://127.0.0.1:8630 ./qa/system_perf.py --json
  REASONER_BASE_URL=http://127.0.0.1:11435/v1 REASONER_MODEL=qwen3.5:9b \\
    ./qa/system_perf.py --reasoner --picoclaw --json
 Does not write Ladybug. Search includes web (D17); expect ~10s+ per search.
 Exit 1 if health/get/audit gates fail. Reasoner is measured, not gated.
 """
 from __future__ import annotations
 import argparse
 import json
 import os
 import statistics
 import sys
 import time
 import urllib.error
 import urllib.request
 from concurrent.futures import ThreadPoolExecutor
 DEFAULT_BRAIN = "http://127.0.0.1:8630"
 DEFAULT_REASONER = "http://127.0.0.1:11435/v1"
 DEFAULT_MODEL = "qwen3.5:9b"
 DEFAULT_PICOCLAW = "http://127.0.0.1:18790"
 GATE_HEALTH_MS = 500
 GATE_GET_P50_MS = 50
 GATE_AUDIT_P50_MS = 50
 def _req(url: str, data: bytes | None = None, timeout: float = 90) -> bytes:
    headers = {"Content-Type": "application/json"} if data is not None else {}
    req = urllib.request.Request(url, data=data, headers=headers)
    with urllib.request.urlopen(req, timeout=timeout) as res:
        return res.read()
 def timed(fn):
    t0 = time.perf_counter()
    out = fn()
    return (time.perf_counter() - t0) * 1000.0, out
 def stats(samples: list[float]) -> dict:
    s = sorted(samples)
    n = len(s)
    return {
        "n": n,
        "min_ms": round(s[0], 1),
        "p50_ms": round(s[n // 2], 1),
        "p95_ms": round(s[min(n - 1, int(n * 0.95))], 1),
        "max_ms": round(s[-1], 1),
        "avg_ms": round(statistics.mean(s), 1),
    }
 def mcp(brain: str, method: str, params=None, timeout: float = 90) -> dict:
    payload: dict = {"jsonrpc": "2.0", "id": 1, "method": method}
    if params is not None:
        payload["params"] = params
    raw = _req(brain.rstrip("/") + "/mcp", json.dumps(payload).encode(), timeout=timeout)
    return json.loads(raw.decode())
 def mcp_call(brain: str, name: str, arguments: dict, timeout: float = 90) -> tuple[bool, str]:
    d = mcp(brain, "tools/call", {"name": name, "arguments": arguments}, timeout=timeout)
    res = d.get("result") or {}
    text = ((res.get("content") or [{}])[0].get("text") or "")
    return (not res.get("isError")), text
 def reasoner_tool_call(base: str, model: str, user: str) -> str:
    payload = {
        "model": model,
        "messages": [
            {"role": "system", "content": "You are PicoClaw. Always call search before answering."},
            {"role": "user", "content": user},
        ],
        "tools": [
            {
                "type": "function",
                "function": {
                    "name": "search",
                    "description": "deduction search",
                    "parameters": {
                        "type": "object",
                        "properties": {"q": {"type": "string"}},
                        "required": ["q"],
                    },
                },
            }
        ],
        "tool_choice": "required",
    }
    raw = _req(
        base.rstrip("/") + "/chat/completions",
        json.dumps(payload).encode(),
        timeout=600,
    )
    chat = json.loads(raw.decode())
    tcs = chat["choices"][0]["message"].get("tool_calls") or []
    if not tcs:
        return ""
    return tcs[0]["function"]["name"]
 def run(args: argparse.Namespace) -> dict:
    brain = args.brain.rstrip("/")
    report: dict = {
        "brain": brain,
        "device": "cpu",
        "ok": True,
        "gates": {},
        "mcp": {},
    }
    ms, _ = timed(lambda: _req(brain + "/health", timeout=5))
    report["mcp"]["health"] = {"n": 1, "avg_ms": round(ms, 1)}
    report["gates"]["health"] = ms <= GATE_HEALTH_MS
    if ms > GATE_HEALTH_MS:
        report["ok"] = False
    list_ms = []
    for _ in range(args.n):
        ms, d = timed(lambda: mcp(brain, "tools/list", timeout=10))
        names = [t["name"] for t in ((d.get("result") or {}).get("tools") or [])]
        if "search" not in names:
            report["ok"] = False
        list_ms.append(ms)
    report["mcp"]["tools_list"] = stats(list_ms)
    audit_ms = []
    for _ in range(args.n):
        ms, (ok, _) = timed(lambda: mcp_call(brain, "audit", {}))
        if not ok:
            report["ok"] = False
        audit_ms.append(ms)
    report["mcp"]["audit"] = stats(audit_ms)
    report["gates"]["audit_p50"] = report["mcp"]["audit"]["p50_ms"] <= GATE_AUDIT_P50_MS
    if not report["gates"]["audit_p50"]:
        report["ok"] = False
    ok, text = mcp_call(brain, "search", {"q": "LadybugDB", "n": 2}, timeout=90)
    inner = json.loads(text) if ok else {}
    hits = inner.get("results") or []
    leaf_id = hits[0]["id"] if hits else ""
    report["mcp"]["search_seed"] = {
        "ok": ok,
        "count": inner.get("count"),
        "web": (inner.get("web") or {}).get("status"),
    }
    get_ms = []
    if leaf_id:
        for _ in range(args.n):
            ms, (ok, _) = timed(lambda: mcp_call(brain, "get", {"id": leaf_id, "body": True}))
            if not ok:
                report["ok"] = False
            get_ms.append(ms)
        report["mcp"]["get"] = stats(get_ms)
        report["gates"]["get_p50"] = report["mcp"]["get"]["p50_ms"] <= GATE_GET_P50_MS
        if not report["gates"]["get_p50"]:
            report["ok"] = False
        def one_get() -> float:
            t0 = time.perf_counter()
            mcp_call(brain, "get", {"id": leaf_id, "body": True})
            return (time.perf_counter() - t0) * 1000.0
        t0 = time.perf_counter()
        with ThreadPoolExecutor(max_workers=8) as ex:
            conc = list(ex.map(lambda _: one_get(), range(8)))
        wall = (time.perf_counter() - t0) * 1000.0
        report["mcp"]["get_concurrent_8"] = {**stats(conc), "wall_ms": round(wall, 1)}
    search_ms = []
    for q in ("LadybugDB", "model2vec"):
        ms, (ok, text) = timed(lambda q=q: mcp_call(brain, "search", {"q": q, "n": 3}, timeout=90))
        inner = json.loads(text) if ok else {}
        search_ms.append(ms)
        report.setdefault("mcp", {}).setdefault("search_samples", []).append(
            {
                "q": q,
                "ms": round(ms, 1),
                "ok": ok,
                "count": inner.get("count"),
                "web": (inner.get("web") or {}).get("status"),
            }
        )
    if search_ms:
        report["mcp"]["search"] = stats(search_ms)
    if args.reasoner:
        base = args.reasoner_url
        model = args.model
        report["reasoner"] = {"base_url": base, "model": model, "calls": []}
        for user in (
            "Use tools. Search the 2dph brain for LadybugDB. Call search.",
            "Use tools. Search the 2dph brain for model2vec. Call search.",
        ):
            ms, name = timed(lambda user=user: reasoner_tool_call(base, model, user))
            report["reasoner"]["calls"].append({"ms": round(ms, 1), "tool": name})
        tools = [c["tool"] for c in report["reasoner"]["calls"]]
        report["gates"]["reasoner_tool_call"] = bool(tools) and all(t == "search" for t in tools)
        if not report["gates"]["reasoner_tool_call"]:
            report["ok"] = False
    if args.picoclaw:
        gw = args.picoclaw_url.rstrip("/")
        ms, raw = timed(lambda: _req(gw + "/health", timeout=5))
        body = json.loads(raw.decode())
        report["picoclaw"] = {
            "url": gw,
            "health_ms": round(ms, 1),
            "status": body.get("status"),
        }
        report["gates"]["picoclaw_health"] = body.get("status") == "ok" and ms <= GATE_HEALTH_MS
        if not report["gates"]["picoclaw_health"]:
            report["ok"] = False
    return report
 def main(argv: list[str]) -> int:
    p = argparse.ArgumentParser(description="2dph system performance (MCP + optional reasoner)")
    p.add_argument("--brain", default=os.environ.get("BRAIN_URL", DEFAULT_BRAIN))
    p.add_argument("--n", type=int, default=20)
    p.add_argument("--json", action="store_true")
    p.add_argument("--reasoner", action="store_true")
    p.add_argument("--picoclaw", action="store_true")
    p.add_argument("--picoclaw-url", default=os.environ.get("PICOCLAW_URL", DEFAULT_PICOCLAW))
    p.add_argument("--reasoner-url", default=os.environ.get("REASONER_BASE_URL", DEFAULT_REASONER))
    p.add_argument("--model", default=os.environ.get("REASONER_MODEL", DEFAULT_MODEL))
    args = p.parse_args(argv)
    try:
        report = run(args)
    except (urllib.error.URLError, TimeoutError, OSError) as e:
        print(f"system_perf: {e}", file=sys.stderr)
        return 1
    if args.json:
        print(json.dumps(report, indent=2))
    else:
        print(f"ok={report['ok']} brain={report['brain']}")
        for name, block in report.get("mcp", {}).items():
            if isinstance(block, dict) and "p50_ms" in block:
                print(f"  {name}: p50={block['p50_ms']} p95={block['p95_ms']} n={block['n']}")
            elif name == "health":
                print(f"  health: {block.get('avg_ms')} ms")
        for k, v in report.get("gates", {}).items():
            print(f"  gate {k}: {v}")
        for c in (report.get("reasoner") or {}).get("calls") or []:
            print(f"  reasoner {c['tool']}: {c['ms']} ms")
    return 0 if report["ok"] else 1
 if __name__ == "__main__":
    raise SystemExit(main(sys.argv[1:]))
@@ -26,14 +26,14 @@ second independent source when local roots cannot confirm. An answer is
 bin/brain/search.go "Matrix federation"                # pointers + snippets, YAML
 bin/brain/search.go "onlyoffice postgres" --root facts # restrict to confirmed
 bin/brain/search.go "where is cs-lexicon" --json | yq '.[].ref'
 bin/brain/add.go --text T --root facts --source "a.md x b.md"
 bin/brain/get.go <id> --body                           # full chunk only when needed
 bin/brain/stats.go                                     # index health
 bin/brain/eval.go                                      # recall@5 >= 0.95 gate (Go; Python bin/kb/eval is CI fallback)
 ```
-`bin/kb/search` is a deprecated wrapper. `--hop N` walks
+`bin/kb/search` is a deprecated wrapper. `--hop` errors (schema has
-`FROM_FILE` / `HAS_VERSION` / `AUTHORED` from each hit (1=File, 3=Person).
+`FROM_FILE`; search does not walk it yet, [#17](https://git.produktor.io/eSlider/2dph/issues/17));
 do not treat it as a graph walk.
 ## Rules
@@ -8,4 +8,4 @@ Serve: `bin/brain/serve.go` (`GET /openapi.json`, `POST /mcp`).
 - `get` — read one leaf by id
 - `stats` — index health
 - `audit` — facts confidence histogram
- `ingest` — add a leaf without rebuild
+- `ingest` — rebuild hint (write is v2)
@@ -1,38 +0,0 @@
 ---
 name: duckdb
 description: >-
  Use https://github.com/duckdb/duckdb-go in-process for columnar analytics
  (quantiles, GROUP BY, JSON/CSV/Parquet/JSONL scans) when that is faster than
  nested Go loops. Not Ladybug. Not the web-search sqlite cache. Use when
  aggregating samples, counting JSONL, or SQL over tabular files.
 ---
 # duckdb-go
 Use https://github.com/duckdb/duckdb-go where it makes sense to get better performance in code.
 In-process DuckDB (`internal/duckstats`, `database/sql` driver `duckdb`).
 Vectorized SQL over tables, JSONL, CSV, Parquet. CGO with bundled libs
 (linux/darwin amd64/arm64). Links with **gcc/g++** (libstdc++), not Zig.
 D21 Zig (`bin/cgo/zcc`) is Ladybug/tokenizers only. After
 `eval "$(bin/cgo/zig env)"`:
 ```bash
 CC=gcc CXX=g++ CGO_CFLAGS= CGO_LDFLAGS= ./bin/qa/stats.go <<< '[1,2,3,4,5]'
 CC=gcc CXX=g++ CGO_CFLAGS= CGO_LDFLAGS= go test ./internal/duckstats
 ```
 | Store | Job |
 |-------|-----|
 | Ladybug | graph + FTS + HNSW (facts/info) |
 | modernc sqlite | web-search KV cache + throttle |
 | duckdb-go | OLAP: quantiles, counts, scans of many rows/files |
 | mikefarah/yq | small YAML/JSON/XML/CSV/TOML/HCL slice, not bulk |
 ```bash
 ./bin/qa/stats.go <<< '[1,2,3,4,5]'
 ./bin/qa/stats.go --jsonl path/to/rows.jsonl
 ```
 Do not open Ladybug through DuckDB. Do not put secrets or client PII into
 DuckDB files under the repo.
@@ -1,15 +1,15 @@
 ---
 name: picoclaw
 description: >-
-  2dph is the memory/fact gate. Compose runs the official PicoClaw gateway.
+  2dph is the memory/fact gate, not the agent loop. Use when wiring PicoClaw
-  Use when wiring PicoClaw or any MCP client: call brain search/get/audit
+  or any MCP client: call brain search/get/audit before a factual reply.
-  before a factual reply. throttled is not a negative finding.
+  throttled is not a negative finding.
 ---
 # PicoClaw — fact-check before assert
-PicoClaw speaks MCP at `POST /mcp` on `bin/brain/serve.go`. Compose profile
+PicoClaw (or any agent) speaks MCP at `POST /mcp` on `bin/brain/serve.go`.
-`picoclaw` runs the official `sipeed/picoclaw` gateway plus `brain-mcp`
+2dph does not run the agent loop. Compose: `docker compose --profile picoclaw up brain-mcp`
 (see [docs/picoclaw.md](../../docs/picoclaw.md)).
 ## Tool order (before a factual reply)
@@ -9,7 +9,7 @@ description: >-
 # postgres
 `bin/postgres/query.go` wraps vendored `bin/db/psql-yq`. Output is YAML
-(cheaper than psql ASCII, easy to slice with mikefarah/yq).
+(cheaper than psql ASCII, easy to slice with `yq`).
 ```bash
 bin/postgres/query.go --profile onlyoffice -s document_asset   # column list
@@ -11,7 +11,7 @@ description: >-
 ```bash
 bin/web/search.go "LadybugDB vector index"
 bin/web/search.go "model2vec multilingual" --category it
-bin/web/search.go "hypervisor" --site example.com --json | yq -r '.results[].url'
+bin/web/search.go "hypervisor" --site example.com --json | jq -r '.results[].url'
 bin/web/search.go "postgres partial index" --lang en --fresh year
 ```
@@ -43,7 +43,7 @@ found" unless the client refuses to call it absence.
 ```bash
 for i in $(seq 10); do
-  bin/web/search.go "test $i" -n 1 --refresh --json | yq -r '.status'
+  bin/web/search.go "test $i" -n 1 --refresh --json | jq -r .status
 done
 ```
@@ -1,33 +0,0 @@
 ---
 name: yq
 description: >-
  Use https://github.com/mikefarah/yq to work with YAML, JSON, XML, CSV,
  TOML, HCL where it's efficient and less code. Use when slicing compose,
  config, --json tool output, CSV/TOML/HCL/XML, or converting between those
  formats. Not kislyuk Python yq. Not jq when yq already does the job.
 ---
 # yq (mikefarah)
 Use https://github.com/mikefarah/yq to work with YAML, JSON, XML, CSV, TOML, HCL where it's efficient and less code.
 This is the Go `yq` (`yq --version` contains `mikefarah`). It is not
 kislyuk/yq (Python, jq-syntax, YAML-only wrapper). `bin/db/psql-yq` already
 calls this binary.
 Prefer `yq` over `python3 -c`, `jq`, or ad-hoc parsers when one expression
 reads or converts the file. Keep Python/Go for HTTP, binary protocols, and
 in-process tests.
 ```bash
 yq '.services.picoclaw.image' compose.yaml
 yq -P . deploy/picoclaw/config.json          # JSON → YAML
 yq -o=json '.gates'                           # JSON stdin (qa/system_perf.py --json)
 yq -p=csv -o=json .
 yq -p=xml -o=json .
 yq -p=toml '.package.name' file.toml
 bin/brain/search.go "LadybugDB" --json | yq '.[].ref'
 bin/web/search.go "hypervisor" --json | yq -r '.results[].url'
 ```
 Do not print secrets, PII, or `$HOME/.config/brain/` through `yq`.