docs: record M-03 GBSE contract evidence

[attaullahfayyaz4u-ux]

Summary

This PR records the evidence that BridgeLayer M-03’s upstream GBSE prerequisite has been satisfied.

GBSE main commit 12df582 now exposes the required runPipeline() diagnostics contract:

• diagnostics.iterationCount
• diagnostics.stagnated
• diagnostics.stagnationTags

This PR does not change BridgeLayer runtime code. It updates BridgeLayer governance docs to mark the GBSE prerequisite evidence as satisfied while keeping final M-03 affirmation pending this PR merge and post-merge verification.

Changes

• Updates ROADMAP.md to record M-03 evidence as EVIDENCE_AFFIRMED / PR_PENDING
• Updates docs/SPECIFICATION.md to remove the stale assumption that GBSE return fields were unverified
• Records GBSE evidence commit 12df582
• Preserves dependency discipline: M-04 only proceeds after this PR is merged and post-merge verified

Validation

Local validation passed:

• npx tsc --noEmit passed
• npm run lint completed with 0 errors and 3 known warnings
• npm test -- --runInBand passed 43/43 tests
• git diff --check passed

Scope Excluded

• No BridgeLayer runtime changes
• No test changes
• No dependency changes
• No release tag
• No M-04 implementation

ATTA Status

LOCAL_VALIDATION_PASSED / PR_READY

GBSE Verdict

CONDITIONAL_PASS — merge is allowed after GitHub CI passes; final affirmation requires post-merge verification on main.

[attaullahfayyaz4u-ux]

Extended PR Title

docs: affirm M-03 GBSE contract evidence for BridgeLayer governance

Extended PR Description

Governance Context

BridgeLayer M-03 was blocked until the upstream GBSE runPipeline() return contract exposed explicit stagnation diagnostics.

The required fields were:

• diagnostics.iterationCount

• diagnostics.stagnated

• diagnostics.stagnationTags

GBSE main commit 12df582 now exposes those fields and passed GBSE validation with 44/44 tests. This BridgeLayer PR records that upstream evidence in BridgeLayer’s governance files.

This is a documentation-governance PR only. It does not modify BridgeLayer runtime behavior.

Documentation Impact Matrix

File | Impact -- | -- ROADMAP.md | REQUIRED_UPDATE — records M-03 upstream GBSE evidence as satisfied docs/SPECIFICATION.md | REQUIRED_UPDATE — removes stale assumption that GBSE return fields were unverified

Evidence Boundary

Confirmed upstream GBSE evidence:

• GBSE main commit: 12df582

• Commit title: fix: expose runPipeline stagnation diagnostics contract

• GBSE diagnostics exposed:

  • diagnostics.iterationCount

  • diagnostics.stagnated

  • diagnostics.stagnationTags

• GBSE validation: 44/44 tests passing

Confirmed BridgeLayer local validation:

• npx tsc --noEmit: passed

• npm run lint: 0 errors, 3 known warnings

• npm test -- --runInBand: 43/43 passing

• git diff --check: passed

Scope Included

• Records M-03 GBSE prerequisite evidence

• Updates roadmap state to EVIDENCE_AFFIRMED / PR_PENDING

• Updates specification state to remove stale unverified-return-field assumption

• Preserves M-04 dependency on post-merge verification

Scope Excluded

• No BridgeLayer runtime adapter implementation

• No BuildGate integration wiring

• No persistent AttaStore implementation

• No benchmark definition

• No release tag

• No package publish

• No dependency or model migration

Risk / Deferral Log

Known non-blocking items:

• TypeScript version warning from @typescript-eslint/typescript-estree

• 3 existing lint warnings

• Anthropic model deprecation warning in test output

Deferred:

• M-04 remains blocked until this PR is merged, pulled into main, validated, and branch-cleaned.

• M-06 benchmark definition remains planned.

• v0.1.0 release remains blocked by future milestone gates.

Rollback / Revert Notes

Safe to revert with a standard Git revert. Reverting would remove the BridgeLayer governance record of the GBSE contract evidence and return M-03 to blocked documentation state.

ATTA Status

ACKNOWLEDGED / TRACKED / TIMESTAMPED / GBSE_AUDITED / LOCAL_VALIDATION_PASSED / PR_READY

GBSE Verdict

CONDITIONAL_PASS — PR is ready to open. Final affirmation requires GitHub CI pass, merge to main, local pull, post-merge validation, and branch cleanup.