# Task 3 report — workflow repository migration

## RED

- `harness/tests/test_session_repository_workflow.py` initially failed at collection:
  `persist_verified_finalization` did not exist.
- The new gate test initially failed because `write_cte_sql` and `write_final_sql`
  were not registered. Its first run also exposed the worktree-local missing
  Node dependency (`typebox`); `npm ci` installed the lockfile dependency.
- After the principal/legacy policy was clarified, the resolver tests initially
  failed because `resolve_principal` did not exist.

## GREEN evidence

- Focused Python regression set: `66 passed`:
  `test_session_repository_workflow`, `test_session_repository`, session mutation/list/
  documents/schema-linking, CTE plan/next, decision phase gate, and phase requirement tests.
- Gate suite: `127 passed`, including
  `session-repository-writes.test.js`.
- Changed-source Ruff checks pass. `git diff --check` passes.

## Implemented boundary

- Added `resolve_principal`: PostgreSQL session storage requires trusted
  `THT_PRINCIPAL_ISSUER` and `THT_PRINCIPAL_SUBJECT`, optional display name, and
  strict admin parsing (`1`/`true`). It fails closed and never substitutes a local
  identity. Filesystem storage uses `local_principal()`.
- Filesystem repository creates UUIDv4 sessions only and permits safe historical
  timestamp IDs (`YYYY-MM-DD-HHMMSS`) for read/mutate compatibility. PostgreSQL
  remains UUIDv4 only.
- Phase helpers fold `SessionSnapshot` ledger/artifacts; decision, phase, CTE,
  session mutation/list/document paths, retrieval-pack persistence, SQL promotion
  lookup, and task-doc/CTE test helpers gained repository/snapshot paths.
- Finalization now publishes report, evidence, and finalized manifest through
  `repository.finalize`: one PostgreSQL transaction; filesystem writes artifacts
  before the finalized manifest commit marker. Solved-question indexing stays
  best-effort after this durable write.
- Added `tht cte save --session --name --file -` and
  `tht sql set-final --session --file -`; Pi tools and SKILL.md now use them.

## Outstanding in-scope migration work

Do not treat this task as complete yet. Remaining direct session path consumers are:

- `harness/tht/cli/memory_cmd.py`: lines 60, 93, 165, 400, 458.
- `harness/tht/cli/sql_cmd.py`: `_session_sql_file` at line 254 remains a legacy
  Path-returning bridge for preview/save/export.
- `harness/tht/cli/session_cmd.py:session_dir` remains only as a compatibility
  bridge for the out-of-scope datamart command and the still-unmigrated memory/
  SQL consumers; workflow mutations in session_cmd do not call it.

The full Python suite has not been conclusively re-run to completion after the
latest changes. An earlier root-directory invocation failed only because a
pre-existing test expects `workflow.yaml` relative to `harness/`. Full gate tests
are green. Full-repo Ruff currently fails on pre-existing test-file lint findings;
changed-source Ruff passes.