# Task 2 report — root Compose startup

Status: DONE

Implemented the root Compose defaults and the single bundle declaration:

- added `.env.example` with automatic Compose defaults (`COMPOSE_FILE=compose.yaml`, an empty
  profile, and the relative `THT_SECRETS_FILE` path);
- removed the mandatory `external` profile from `core` and `frontend`;
- mounted `deploy/secrets/thothii.secrets` at `/run/secrets/thothii.secrets` and passed only the
  mounted path into the core container;
- changed the production overlay to inherit that bundle instead of declaring per-secret mounts;
- removed the local overlay's legacy `env_file` dependency;
- added the versioned bundle template and `.gitignore` exception;
- updated deployment security checks and added `scripts/test-default-compose.sh`.

Focused verification:

```text
./scripts/test-default-compose.sh                 # default Compose contract passed.
./scripts/test-container-deployment.sh            # container deployment security contract passed.
./scripts/test-preprocess-compose-config.sh      # preprocess compose config: ok
docker compose --env-file .env.example config --quiet
  (with a temporary mode-0600 bundle via THT_SECRETS_FILE)
git diff --check
```

The local-vector and preprocess service secret declarations remain for Task 3, which converts
those services to the same bundle helper. Documentation and smoke command migration is reserved
for Task 4.

---

# Task 2 report — PostgreSQL session repository

## Scope delivered

- Added `PostgresSessionRepository`, implementing the Task 1 repository contract with a
  direct PostgreSQL SQLAlchemy connection, transaction-local RLS context, UUIDv4 validation,
  current artifacts (including `cte_sql:<name>`), append-only decisions, preferences, and
  content-free deletion tombstones.
- Added `tht session migrate --database-url URL [--status] --json` and a checksum-protected,
  advisory-transaction-locked migration runner.
- Added server session configuration selection. `session_storage.connection` uses direct
  PostgreSQL TLS modes `verify-ca` or `verify-full`; it does not use PostgREST.
- Updated packaging and `.gitignore` so session migrations are present in the built wheel.
- Did not alter Task 3 workflow commands, Pi gate code, or backend code.

## TDD evidence

### RED

Command:

```sh
cd harness && .venv/bin/pytest tests/test_postgres_session_repository.py tests/test_session_migrate_cmd.py -q
```

Result before production implementation: `1 failed, 4 errors in 3.89s`.

- Four setup errors were `ModuleNotFoundError: No module named
  'tht.session.postgres_repository'`.
- The migration CLI test failed because `tht session migrate` did not exist (`No such command
  'migrate'`).

### GREEN

Initial focused suite after implementation: `5 passed in 4.18s`.

Final focused verification:

```sh
cd harness && .venv/bin/pytest \
  tests/test_session_repository.py \
  tests/test_postgres_session_repository.py \
  tests/test_session_migrate_cmd.py \
  tests/test_vector_migration_packaging.py -q
```

Result: `12 passed in 5.80s`.

Changed-file lint verification:

```sh
cd harness && .venv/bin/ruff check \
  tht/session/postgres_repository.py tht/migrations/sessions tht/config.py \
  tht/session/repository.py tht/cli/session_cmd.py \
  tests/test_postgres_session_repository.py tests/test_session_migrate_cmd.py \
  tests/test_vector_migration_packaging.py
```

Result: `All checks passed!`.

## Migration and role policy choices

`001_schema.sql` creates only private `thoth_sessions` tables:

- `principals` and `principal_preferences`;
- `sessions`, with `session_artifacts` and `review_decisions` cascading on session deletion;
- `audit_log`, which deliberately has no content/detail/metadata column and keeps only action,
  session UUID, actor identity, owner identity, and timestamp.

`002_security.sql` creates separate `thoth_sessions_runtime` and
`thoth_sessions_migrator` group roles, explicitly `NOLOGIN NOBYPASSRLS NOSUPERUSER`, revokes
public access, gives the runtime role only the operations required by the adapter, and enables
and forces RLS on every table. Owner/admin policies read only transaction-local settings:
`thoth_sessions.actor_issuer`, `thoth_sessions.actor_subject`, and
`thoth_sessions.is_admin`. The adapter starts every operation in a transaction, switches to the
restricted runtime role, sets those settings with `set_config(..., true)`, and uses advisory
transaction locks for migrations and per-session mutations.

The runtime role remains a `NOLOGIN` group role by design. Deployment must provision a dedicated
non-superuser LOGIN role and grant it membership, for example:

```sql
CREATE ROLE thoth_sessions_app LOGIN NOINHERIT PASSWORD '<secret>';
GRANT thoth_sessions_runtime TO thoth_sessions_app;
```

This avoids embedding an environment-specific login name or credential in versioned SQL. The
new integration test proves that this non-superuser membership path can create and read a
session while the adapter executes as `thoth_sessions_runtime`.

## Security/self-review

- Owner isolation and admin cross-owner reads run against disposable PostgreSQL containers,
  not Supabase.
- No table or column includes `embedding`; repository code imports no embedding/vector code;
  the regression test writes a session artifact under a monkeypatched embedding sentinel.
- An unauthorized owner receives the same `SessionError` as an absent session, preserving the
  future backend's 404 mapping boundary.
- The audit row is inserted before deleting the parent session, so cascades remove all artifact
  and decision content while the tombstone survives.
- A security review found and this task fixed the initial `.gitignore` rule that would have
  excluded `migrations/sessions/*.sql` from Git/wheels. The wheel test now asserts both session
  migration files and checks both the existing vector CLI and the new session CLI.
- The review also highlighted runtime login provisioning. It is covered by a non-superuser
  regression test and documented above; concrete credential/role deployment belongs to Task 7.

## Remaining concerns

- Full `harness/.venv/bin/pytest -q` could not complete in this execution environment: the
  runner terminated the command after roughly 30 seconds. Captured output reached 44% with no
  failures before termination; `pgrep` confirmed no pytest process remained. The Task 2 focused
  suites above completed successfully.
- `harness/.venv/bin/ruff check .` currently reports 34 pre-existing violations in unrelated
  test files (for example unused imports in `tests/l0/test_db_connection.py` and semicolon style
  in `tests/test_phase_effective.py`). The changed-file Ruff command is clean.
- Task 7 must safely provision the dedicated runtime login/membership and inject its TLS
  credentials/CA; this task intentionally does not create a deployment-specific LOGIN role or
  password.

## Review follow-up — unavailable migration database JSON contract

### RED

Command:

```sh
cd harness && .venv/bin/pytest \
  tests/test_session_migrate_cmd.py::test_session_migrate_status_database_failure_is_pristine_json -q
```

Result: `1 failed in 0.46s`. The unreachable direct PostgreSQL URL exited with code 1 but left
stdout empty, so `json.loads(result.stdout)` raised `JSONDecodeError`.

### GREEN

The session migration CLI now catches `SQLAlchemyError` at the same command boundary as its
migration/domain errors and emits only `{"error": ...}` on stdout for `--json`.

```sh
cd harness && .venv/bin/pytest tests/test_session_migrate_cmd.py -q
cd harness && .venv/bin/ruff check tht/cli/session_cmd.py tests/test_session_migrate_cmd.py
```

Result: `2 passed in 3.60s`; Ruff: `All checks passed!`.