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vcsdd-spec

Run Phase 1a (behavioral specification) and Phase 1b (verification architecture) for the active VCSDD feature. Invokes vcsdd-builder to write EARS-format requirements and purity boundary analysis.

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SKILL.md (original)

Review the instructions the agent will receive before you install.

What

Runs the spec crystallization phases (1a and 1b) for the active feature. Phase 1a produces the behavioral specification using EARS format. Phase 1b produces the verification architecture with purity boundary map and proof obligations.

When

Run immediately after /vcsdd-init. Requires active feature at phase init or 1a.

How

  1. Check active feature: read .vcsdd/index.json.activeFeature (mirrored to .vcsdd/active-feature.txt)
  2. Check current phase: must be init, 1a, or 1b
  3. Invoke vcsdd-builder agent for Phase 1a:
    • Write specs/behavioral-spec.md with EARS requirements
    • Cover all functional requirements, edge cases, and non-functional constraints
    • Identify purity boundary candidates
  4. Transition to 1a: transitionPhase(feature, '1a')
  5. Run Phase 1b for all modes:
    • Write specs/verification-architecture.md
    • Define proof obligations (PROP-XXX) per requirement
    • Assign verification tiers (0-3)
    • Map purity boundary explicitly
  6. Transition to 1b: transitionPhase(feature, '1b')
  7. Create traceability beads for each REQ-XXX and PROP-XXX

Lean Mode Behavior

Lean mode still completes both Phase 1a and Phase 1b. The difference is that lean mode typically records fewer required: true proof obligations and does not require strict-mode human approval at the spec gate.

Examples

/vcsdd-spec

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