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Trevin Chow 9859f754d2 feat(ce-work): recognize U-IDs and preserve them in task labels
Close the execution side of the brainstorm-plan-work traceability loop:

- Track Progress guidance now recognizes U-IDs alongside R/A/F/AE in
  blockers, deferred-work notes, task summaries, and final verification.
  U-IDs anchor units across plan edits; R/A/F/AE anchor product intent
  across the brainstorm-plan handoff. The 'use IDs the plan supplies,
  don't invent ones it doesn't' rule prevents synthetic ID creation.

- Create Todo List step now includes U-ID prefix preservation: when the
  plan defines U-IDs, the unit's U-ID becomes the task subject prefix
  (e.g., 'U3: Add parser coverage'). This anchors blockers and
  summaries to the same identifier the plan uses, so a 'U3 blocked'
  status update unambiguously matches the source unit even after the
  plan has been edited or reordered.

Propagated to beta — shared traceability contract. The U-ID recognition
guidance applies equally to both execution modes; nothing about delegate
mode (the experimental beta-only behavior) interacts with ID semantics.

Refs PR #629.
2026-04-21 15:25:07 -07:00
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