transcription/docs/ver1/ver1-step4-results.md

Ver1 Step 4 Results: Data Model and Migration Safety

Summary

Step 4 implementation status: in progress.

This document records completed migration-safety work, validation evidence, and remaining follow-ups for Ver1 Step 4.

Implemented in this step:

1. TBD
2. TBD
3. TBD

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Implemented Changes

1) Schema audit and invariant lock

TBD

2) Migration policy/tooling lock

TBD

3) Forward migration implementation

TBD

4) Rollback and mitigation runbook

TBD

5) Backfill implementation or explicit no-backfill decision

TBD

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Test and Verification Evidence

Added/Updated Tests

1. TBD
2. TBD
3. TBD

Validation Runs

Run and record outcomes:

• uv run pytest --collect-only -q -> TBD
• uv run pytest -m unit -q -> TBD
• uv run pytest -m "not external" -q -> TBD
• uv run pytest -q -> TBD

Migration Rehearsal Evidence

Record migration rehearsal details:

• baseline data set used: TBD
• forward migration result: TBD
• post-migration verification result: TBD
• rollback/mitigation rehearsal result: TBD

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Requirement Traceability (Step 4)

Step 4 Area	REQ Coverage	Status	Evidence
Schema lifecycle and state persistence safety	REQ-3, REQ-4, REQ-11	TBD	TBD
Lifespan/runtime ownership continuity	REQ-7	TBD	TBD
Explicit non-mutating production startup policy	REQ-10	TBD	TBD
Prompt/data continuity constraints	REQ-12	TBD	TBD

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Operational Artifacts Produced

• docs/ver1/ver1-step4.md
• docs/ver1/ver1-step4-migration-runbook.md (if created)
• TBD additional artifacts

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Risks, Exceptions, and Follow-Ups

1. TBD
2. TBD
3. TBD

Open follow-ups to carry forward:

• TBD

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Step 4 Exit Assessment

• Schema validation against finalized V1 domain: TBD
• Forward migration path safety and repeatability: TBD
• Rollback/mitigation readiness: TBD
• Backfill risk closure: TBD
• Test and regression safety: TBD

Step 4 completion status: TBD

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Handoff to Step 5

Once Step 4 is marked complete, Step 5 can proceed with:

• verified migration safety baseline
• explicit rollback and recovery procedures
• reduced data-integrity risk entering private-network safety hardening