<pattern_mapping_context>
**Phase:** {phase_number} - {phase_name}
**Phase directory:** {phase_dir}
**Padded phase:** {padded_phase}

<required_reading>
- {context_path} (USER DECISIONS from /gsd:discuss-phase)
- {research_path} (Technical Research)
</required_reading>

**Output file:** {phase_dir}/{padded_phase}-PATTERNS.md

Extract the list of files to be created/modified from CONTEXT.md and RESEARCH.md. For each file, classify by role and data flow, find the closest existing analog in the codebase, extract concrete code excerpts, and produce PATTERNS.md.
</pattern_mapping_context>