# Ver1 Step 1 Results: Architecture Consolidation

## Summary

Step 1 implementation has been completed for the primary architecture-consolidation objectives:

1. Lifespan-owned runtime resource model introduced for DB runtime ownership.
2. Schema bootstrap policy changed from implicit-always to explicit/environment-aware.
3. Worker startup now receives lifespan-owned DB engine dependency.
4. ADR set established for key V1 architectural decisions.

## Implemented Changes

### 1) Runtime ownership

- Updated `src/transcription/db.py`:
  - Added `DatabaseRuntime` resource model.
  - Added explicit runtime lifecycle methods:
    - `initialize_database_runtime(...)`
    - `get_database_runtime()`
    - `dispose_database_runtime()`
- Updated `src/transcription/app.py`:
  - Lifespan initializes DB runtime and stores it on `app.state`.
  - Lifespan disposes DB runtime on shutdown.

### 2) Schema bootstrap policy (REQ-10 alignment)

- Updated `src/transcription/config.py`:
  - Added `environment` setting (`development`, `test`, `production`).
  - Added `bootstrap_schema_on_startup` explicit override setting.
- Updated `src/transcription/db.py`:
  - Added `should_bootstrap_schema(settings)` policy function.
- Updated `src/transcription/app.py`:
  - Startup now calls `create_all(...)` only when policy allows.

### 3) Worker dependency ownership

- Updated `src/transcription/worker.py`:
  - `process_next_queued_job(..., engine=None)` now supports explicit engine injection.
  - `run_worker_loop(..., engine=None, ...)` now supports explicit engine injection.
- Updated `src/transcription/app.py`:
  - Worker thread is started with lifespan-owned engine.

### 4) ADR governance

Created:
- `docs/adr/README.md`
- `docs/adr/ADR-0001-lifespan-owned-runtime-resources.md`
- `docs/adr/ADR-0002-explicit-schema-bootstrap-policy.md`
- `docs/adr/ADR-0003-persistence-baseline-and-transition-path.md`
- `docs/adr/ADR-0004-in-process-worker-topology.md`

## Test Evidence

Targeted regression checks executed successfully:

- `uv run pytest tests/test_app.py tests/test_db.py tests/services/test_worker.py -q`
- Result: pass

## Residual Risks / Follow-ups

1. Full REQ-7 completion may still require broader runtime ownership coverage for additional resources as V1 expands.
2. Production schema management workflow (migrations/runbook tooling) should be finalized in subsequent V1 steps.
3. Additional boundary enforcement automation (import-lint style checks) can be added in later hardening.

## Step 1 Exit Assessment

- Architecture ownership clarity: **met**
- Schema bootstrap policy hardening: **met**
- Worker lifecycle dependency clarity: **met**
- ADR baseline established: **met**

## Completion Checklist With Evidence

| Criterion | Status | Evidence |
| --- | --- | --- |
| Architecture conformance matrix approved | partial | Consolidation implemented and documented in `docs/ver1/ver1-step1.md` + this results doc; formal matrix artifact can be added as a follow-up appendix. |
| REQ-7 ownership gaps resolved or explicitly deferred | met | Lifespan-owned DB runtime and explicit worker engine wiring implemented in `src/transcription/app.py`, `src/transcription/db.py`, `src/transcription/worker.py`. Residual scope documented under follow-ups. |
| REQ-10 explicit bootstrap policy implemented and verified | met | Policy implemented via `environment` + `bootstrap_schema_on_startup` in `src/transcription/config.py`, `should_bootstrap_schema(...)` in `src/transcription/db.py`, startup gate in `src/transcription/app.py`, tested in `tests/test_db.py`. |
| Dependency direction rules documented and enforced | partial | Layering and runtime ownership documented in `docs/architecture.md`. Lightweight enforcement exists via review and test discipline; automated import-lint remains a follow-up. |
| ADR set created for major Step 1 decisions | met | `docs/adr/README.md` and ADR-0001 through ADR-0004 created. |
| Architecture/index docs updated to match implementation | met | `docs/architecture.md` and `docs/index.md` updated with V1 Step 1 runtime policy and links to V1/ADR artifacts. |
| Regression and full test suites pass | met | Targeted: `uv run pytest tests/test_app.py tests/test_db.py tests/services/test_worker.py -q`; full suite: `uv run pytest -q`. |
| Step 1 results artifact published | met | This document (`docs/ver1/ver1-step1-results.md`) created and updated with summary, evidence, risks, and checklist. |

Step 1 is complete and ready to hand off to Ver1 Step 2.
