transcription/docs/ver1/ver1-step1-results.md

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.