Prevent cross-document Bench build cards

[Romonaga]

Change Type

• Feature
• Bug fix
• Refactor
• Documentation / workflow artifact
• Repo organization / cleanup
• Other: ___

Linked Workstream Change

• Linked Verlyn change: circuit-shelf-18
• No change applies - reason: ___

Verlyn PR Metadata

Verlyn PR creator: ___

Acceptance Criteria

• A Finder candidate for one source cannot produce a Bench plan from a different datasheet intelligence source. Build-card intelligence is constrained to retrieved/cited sources unless there is an explicit component/source match. Cross-document mismatches return no deterministic build card and can fall back to recovery/null. Regression tests cover ICL8038 not becoming WEO012864MX and source notes staying aligned.

Verification Runs Completed

• Session baseline
• Architecture check (if configured)
• Workstream validation: python scripts/repo_helpers/workflow/validate.py <id> --strict
• Other:
  • ___

Coverage Summary

• 3 of 4 tracked work items are complete.

AI Assistance Disclosure

• AI-assisted - tool(s) used: Codex
• Human-authored only

Accountable human owner: hellweek

Seeded by Verlyn for Prevent cross-document Bench build cards: this tracked change is being managed through Verlyn's solo workflow path. Replace this note with the concrete AI-assisted tools and scope before merge if implementation, review, or packet authoring used AI, or replace it with 'Human-authored only.' when no AI assistance materially shaped the final change.

Independent Cross-Agent Review

• Not required for this change - reason: ___
• Completed - reviewer tool: Verlyn workflow gate | findings summary: No blocking findings recorded.
  • Unresolved findings:
    • ___

Rollback Plan

• Revert the build-card source-selection guard and associated tests; existing recovery path remains unchanged.

Handoff Status

• All acceptance criteria satisfied
• Verlyn-managed work items updated
• Outstanding blockers or deferred items noted
• Ready to merge