phase: 102_extensionless_filenames

All verification complete — every gate green, no defects found in previously completed work.

**Phase 102 final verification pass — report**

Verified (all three task files present in `complete/`; working-tree implementation matches D1–D5 design):
- `match_extension` choke point in `app/rag/importer.py` (walk + `formats` counter), `doc_format` name-token badge in `app/api/docs.py`, config/`.env.example` docs, fixture `tests/fixtures/extensionless_kb/`, integration + E2E suites — all present and correct
- Completion criteria: end-to-end sync (✓ integration + E2E), case matrix incl. `mydockerfile`/`Dockerfile.dev`/`.dockerfile` exclusions (✓ unit), `formats=dockerfile:1` not `unknown` (✓ log-line assertion), badge `dockerfile`/`containerfile` + `text` fallback + suffixed unchanged (✓ unit/integration/E2E), prune-on-token-removal (✓ `pruned==2`), suffixed-path rule byte-identical (✓ single-line swap, existing cases untouched)

Test / lint results (exact commands):
- `uv run pytest --cov=app --cov-report=term-missing` → 2084 passed, **99%** coverage (>90% gate)
- `uv run pytest tests/e2e/test_extensionless_import.py -v --no-cov` → 2 passed, isolated, DB up
- Regressions isolated: `test_import_documents` 3✓, `test_import_extensions_env` 2✓, `test_quadlet_jinja_import` 4✓, `test_document_viewer` 7✓, `test_kb_tree` 8✓
- `uv run ruff check .` → clean; `uv run pyright` → 0 errors, 0 warnings

Notable: commit intentionally not made (harness commits the phase); 102's task files already sit in `complete/`, overview stays in `todo/` for the harness.
Next pending phases: 98, 99, 103, 104, 105 (numeric next after 102: `103_suggestions_session_openers`).

tests/fixtures/extensionless_kb/Containerfile

@@ -0,0 +1,14 @@
+# CONTAINERFILE-PROBE-SENTINEL-4b1c — phase 102 fixture marker: this
+# token exists nowhere else (the Dockerfile sibling carries its own).
+#
+# Containerfile — the local Postgres 17 + pgvector image the compose
+# stack builds for the Brain of Reese database service.
+
+FROM postgres:17
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends build-essential git \
+    && git clone --branch v0.7.4 https://github.com/pgvector/pgvector /tmp/pgvector \
+    && make -C /tmp/pgvector install \
+    && rm -rf /tmp/pgvector \
+    && apt-get purge -y build-essential git

tests/fixtures/extensionless_kb/Dockerfile

@@ -0,0 +1,16 @@
+# DOCKERFILE-PROBE-SENTINEL-7a3e — phase 102 fixture marker: this token
+# exists nowhere else, so the extensionless_kb rows are unambiguous in
+# the shared database.
+#
+# Dockerfile — the Brain of Reese app image: a slim Python runtime that
+# serves the FastAPI app behind the homelab reverse proxy.
+
+FROM python:3.12-slim
+
+WORKDIR /app
+COPY pyproject.toml uv.lock ./
+COPY app ./app
+RUN pip install --no-cache-dir uv && uv sync --frozen --no-dev
+
+EXPOSE 8000
+CMD ["uv", "run", "uvicorn", "app.main:app", "--host", "0.0.0.0"]

tests/fixtures/extensionless_kb/Makefile

@@ -0,0 +1,10 @@
+# Makefile — phase 102 negative control: extensionless, and no token in
+# the env under test names it exactly, so the importer must skip it
+# (the exact-name rule never reaches for a compound or unrelated name).
+.PHONY: up down ps
+up:
+	podman compose up -d
+down:
+	podman compose down
+ps:
+	podman compose ps

tests/fixtures/extensionless_kb/notes.md

@@ -0,0 +1,6 @@
+# Extensionless fixture notes
+
+A short markdown control document for the phase 102 extensionless-kb
+fixture. With `import_extensions="md,dockerfile,containerfile"` the
+importer walks this file plus the name-token build files (`Dockerfile`,
+`Containerfile`); with `md` alone, this note is the only import.