Stage

[mikemol]

This pull request introduces new baseline artifacts for ambiguity and annotation drift, adds CI job steps to gate and emit evidence-related deltas, and updates documentation to clarify evidence carrier semantics and helper scripts. It also refreshes review metadata across multiple files to reflect these changes and ensure workflow and policy alignment.

CI and baseline enhancements:

• Added new baseline artifacts: baselines/ambiguity_baseline.json and baselines/test_annotation_drift_baseline.json to track ambiguity and annotation drift evidence surfaces. [1] [2]
• Expanded .github/workflows/ci.yml with new job steps for emitting, advising, and gating obsolescence, annotation drift, and ambiguity deltas, including environment variable controls for unmapped/orphaned/ambiguity gates.

Documentation updates (policy and workflow):

• Updated docs/coverage_semantics.md to clarify evidence surface coverage requirements, define out/test_evidence.json as the canonical carrier, and explain advisory projections and CI gating policy.
• Refreshed CONTRIBUTING.md with baseline refresh and CI watch helper instructions for contributors, and updated review metadata in all related docs to reflect new revision and workflow alignment. [1] [2] [3] Fe756b8dL15R15, [4] [5] [6] [7] [8] [9] [10]

Evidence-first semantics and index changes:

• Revised in/in-29.md to clarify evidence ID/key concepts, dominance/equivalence definitions, and update feature descriptions to reflect future implementation plans for branch-irrelevance reporting. [1] [2] [3] [4] [5]
• Updated docs/influence_index.md to add new status entries and align review notes with glossary and workflow updates.

These changes collectively strengthen evidence tracking, clarify contributor workflows, and improve CI enforcement for evidence-related artifacts.