Implement Change

Execute an implementation plan phase by phase, producing working code with verification at each step.

Design Philosophy

While implementing, consult references/software-design-philosophy.md for code-level design principles. Watch for red flags: shallow modules, information leakage, pass-through methods, temporal decomposition.

Principles

• Understand before coding — read all relevant files thoroughly first
• Phase by phase — complete one phase before starting the next
• Verify as you go — run checks after each phase, fix issues before proceeding
• Adapt to reality — plans are guides, not rigid scripts; handle mismatches thoughtfully
• Track progress — keep todos updated, check off items as completed
• Sub-agents for exploration, not execution — dispatch sub-agents to research codebase patterns or read multiple files in parallel before coding. Do not delegate code changes to sub-agents — implement directly. Fan out multiple sub-agents in one turn when gathering independent context (e.g., reading tests + reading related modules).

Input