Keeps project ARCHITECTURE.md up-to-date with system design, patterns, and conventions. Use when infrastructure changes, new patterns are established, data models change, or when user explicitly requests /architecture command.
Converts a legacy flat process-notes.md file into the per-entry process-notes/ folder format. Use when the process-notes skill refuses to write because it detects the old format, or when the user explicitly requests /project-docs:convert-flat-process-notes-to-dir.
Maintains comprehensive project history in a process-notes/ folder that documents work process, decisions, dead ends, and progress. Each entry is a separate file named by timestamp + slug. Use when context window fills up (approaching 60% of token budget), when making key decisions or reaching milestones, or when the user explicitly requests /project-docs:process-notes.
Keeps project README.md up-to-date with current state of the project. Use when structural changes occur, behavior changes, setup/config changes, feature additions/removals, or when user explicitly requests /readme command.
Documents A/B tests with variants, hypothesis, measurement plan, and conclusions. Use when the user mentions running an A/B test, comparing two variants, or wanting to measure/test something systematically.