name: phase-implement
description: Execute an existing docs/planning/phase-N plan sequentially; completes subphases in order, appending outputs and handoffs.

Instructions

Read all references in references/ before using this skill.

Multi-Agent Awareness

IMPORTANT: Multiple agents may be working on different phases concurrently. During execution:

1. Before each subphase: Run git status and re-read files you plan to modify
2. When you encounter unexpected file state: Another agent may have modified the file — check the last 10 phases
3. When builds fail unexpectedly: Check for schema changes or API changes from other phases
4. Document conflicts: Log any coordination issues in your subphase Output section

If a file you need has been modified by another phase:
- Read the other phase's plan.md to understand their changes
- Merge semantically (don't just overwrite)
- Note the integration in your Output section

See 06_MULTI_AGENT_COORDINATION.md for detailed procedures.

Signals

• The user says "execute the phase", "work through the subphases", "continue the plan"
• A phase folder exists with a root plan.md and subphase folders ready
• Work needs to proceed through an established planning structure

References

Directory: references/

• 01_INTENT.md
• 02_PRECONDITIONS.md
• 03_RULES.md
• 04_PROCEDURE.md
• 05_OUTPUT.md
• 06_MULTI_AGENT_COORDINATION.md