Provides strategic guidance to the executor at high-leverage moments – early in a task before substantive work, before declaring done, when stuck, or when changing approach. Returns a short enumerated plan or course correction (no prose). Use as a checkpoint, not a per-step assistant.
Implements backend code including schemas, storage, APIs, and security following the project's CLAUDE.md rules and established patterns. Use after plan approval to implement or verify data layer changes.
Maintains the project's living context across sessions by writing structured progress files into the compound-documenter's project-local agent memory. Records pipeline state, key decisions, and stale dependents. Use after every phase completion or significant decision.
Reads project files, CLAUDE.md, existing deliverables, design system, and documentation to build a comprehensive context summary for other agents. Use when starting any development task or when agents need current project state.
Produces formatted deliverable documents from skill outputs, ensuring consistent formatting, executive summaries, and proper structure. Use at the end of any skill's workflow to generate the final document.
Audits implemented UI code for both design system compliance (tokens, component reuse, monolithic views) AND aesthetic quality (4-lens critique, 4 named tests, AI Slop Test against the 2026 anti-pattern catalog). Produces a violation report with fixes. Use after every UI implementation phase.
Implements pixel-perfect UI matching Figma designs with zero creative interpretation, reusing existing design system elements and components. Use after backend verification to build or update frontend screens and components.
Performs a broad psychology principles scan across a design, identifying opportunities and violations across 100+ cognitive, behavioral, and emotional principles. Returns prioritized findings. Use as the entry point for psychology-driven design review.
Writes failing test scripts using Playwright CLI to verify expected behavior before implementation. Use after plan approval to establish the Red phase of TDD.
Conducts UX research activities including competitor analysis, user interview preparation, assumption mapping, survey design, and research synthesis. Use during research-heavy skills or when validating design decisions with evidence.