/init-workspace-flow-patterns

<init_workspace_flow_patterns>

<description_and_purpose> Extract recurring code structures into explicit reusable pattern templates. Without them, agents reinvent conventions per task. Proof: docs/PATTERNS/ contains INDEX.md, per-module files, and CHANGES.md referenced by downstream coding tasks. </description_and_purpose>

<workflow_context>

• Phase 5 of 8 in init-workspace-flow
• Input: CODEMAP, source code
• Output: docs/PATTERNS/ (INDEX.md, per-module files, CHANGES.md)
• Prerequisite: Phase 3 complete (CODEMAP exists) </workflow_context>

<phase_steps>

1. Read state and CODEMAP
2. Acquire pattern extraction skill
3. Execute multi-agent pattern extraction
4. Update state, log gaps </phase_steps>

<read_state step="5.1">

1. Read agents/init-workspace-flow-state.md
2. Confirm Phase 3 complete and CODEMAP exists
3. Read state.mode for dual-mode behavior </read_state>

<acquire_skills step="5.2">

1. ACQUIRE init-workspace-patterns/SKILL.md FROM KB </acquire_skills>

<execute_extraction step="5.3" subagent="built-in" role="Senior pattern analyst extracting reusable conventions" subagent_recommended_model="claude-sonnet-4-6, gpt-5.4-medium, gemini-3.1-pro-preview">

1. Read CODEMAP, identify distinct modules
2. Required skill init-workspace-patterns
3. Spawn built-in subagent per module scope for pattern extraction
4. Merge subagent results into docs/PATTERNS/ structure
5. Deduplicate patterns found across modules </execute_extraction>

<update_state step="5.4">

1. Write Phase 5 completion to agents/init-workspace-flow-state.md
2. Update PATTERNS row in file inventory
3. Log gaps for Phase 7 </update_state>

<validation_checklist>

• docs/PATTERNS/INDEX.md exists and lists all extracted pattern files
• Every CODEMAP module has pattern coverage or explicit skip reason
• State file shows Phase 5 complete
• Upgrade mode: no human-curated patterns overwritten </validation_checklist>

- Do not extract implementation details as patterns — only genuinely recurring structures - Scope subagents by CODEMAP module boundaries, not arbitrary directory splits

</init_workspace_flow_patterns>