# Phase 01 — Infrastructure Foundation

**Story:** — (foundation; no user story)
**Context:** `.agents/PLAN.md` §2–§5, §8–§10 · `AGENTS.md`

## Goal
A verified, reproducible foundation: environment installs, Postgres 17 +
pgvector running via `podman compose up -d db`, migrations applied, app
booting with `/api/health`, lint/types clean, and the smoke E2E green.
The scaffolding already exists in the repo — this phase **verifies and
completes** it (fix gaps rather than rewrite).

## Implementation steps
1. `uv sync` — confirm all deps resolve from `uv.lock`.
2. `podman compose up -d db` — build the `db/` image (postgres:17 +
   pgvector) and start the container; `podman compose ps` must show
   `healthy`.
3. `uv run alembic upgrade head` — schema applied (`documents`, `chunks`,
   `query_log`, `vector` extension). Verify with
   `psql -h localhost -U reese -d brain_of_reese -c '\d chunks'`
   (embedding column `vector(768)`).
4. `uv run python -m scripts.llm_probe` — live aipi check: `turbo` + `embed`
   present, dim 768. (If the endpoint is unreachable, record it and continue;
   E2E uses the mock.)
5. `DEBUGPY=0 uv run uvicorn app.main:app` boots and serves `/`,
   `/api/health`, `/api/suggestions` (Ctrl-C to stop). Also verify
   `DEBUGPY=1` prints the debugpy listen warning and the app stays
   responsive.
6. Fix anything broken in scaffold files (keep PLAN-conformant).

## Testing & Quality
- Unit + integration: `uv run pytest` — green.
- Coverage: `uv run pytest --cov=app --cov-report=term-missing` — record the
  number; the >90% gate is enforced from the first feature phase onward
  (skeleton coverage should already be high).
- Lint/types: `uv run ruff check .` and `uv run pyright` — zero errors.

## Playwright Execution Phase
Run ONLY the smoke suite (verify the browser is installed first —
`uv run playwright install chromium` if missing):

```bash
uv run pytest tests/e2e/test_smoke.py -v --no-cov
```

Expected: 3 passed (health, index page, placeholder round-trip).

## Success criteria
- [ ] `podman compose up -d db` → healthy
- [ ] `alembic upgrade head` clean; `vector(768)` column present
- [ ] app boots; `/api/health` `db: up`
- [ ] unit + integration green; ruff + pyright clean
- [ ] smoke E2E green in isolation
- [ ] committed (see below)

## Commit
```bash
git add -A && git commit --no-gpg-sign -m "chore(infra): verify foundation — pg17+pgvector, migrations, debugpy gating, smoke E2E"
```

---

## ✅ Completion record (2026-08-21)

- `uv sync` — env created (CPython 3.13), deps locked in `uv.lock`
- `podman compose up -d db` — image `brain-of-reese/db:pg17-vector` built
  (fixed: base image needed `postgresql-server-dev-17` before compiling
  pgvector), container **healthy**
- `alembic upgrade head` — clean; `\d chunks` shows `embedding vector(768)`,
  FK `ON DELETE CASCADE`, `vector` extension installed
- `scripts/llm_probe` (live) — models: turbo, embed, lite, juggernaut,
  uncensored, openai/image; **dims(embed): [768]** — A6 confirmed
- App boot: `/api/health` → `{"status":"ok","db":"up"}`; static frontend
  served locally; `DEBUGPY=1` logs the listener and keeps serving,
  default run has no debugpy import
- Placeholder `/api/chat` added (round-trip exercised end-to-end;
  replaced by SSE RAG in phase 03)
- Quality: **24 unit+integration passed, 99 overage** on app/,
  `ruff check .` clean, `pyright` 0 errors
- E2E: `uv run playwright install chromium` done; `test_smoke.py`
  **3 passed in isolation**
- Commit: `feat: scaffold Brain of Reese — FastAPI RAG chat over Postgres 17 + pgvector`
  (--no-gpg-sign)