Long-running iterative development loops with pacing control and verifiable progress. Use when tasks require multiple iterations, many discrete steps, or periodic reflection with clear checkpoints; avoid for simple one-shot tasks or quick fixes.
Rapid task execution without hesitation or deterrence. Expert in overcoming blockers, making quick decisions, and maintaining forward momentum. Use for urgent tasks, breaking through impediments, decisive action. Activates on 'swift', 'execute quickly', 'undeterred', 'overcome blocker', 'just do it'. NOT for strategic planning, careful analysis, or research tasks.
Add or modify tasks in Implementation Plan. Use when user proposes new requirements, changes priorities, or adjusts existing task scope.
Use when executing implementation plans with independent tasks in the current session
Activate when breaking down implementation plans into detailed task lists with agent contexts, acceptance criteria, and status tracking
Use when starting work, tracking tasks, or deciding where to record discovered work - clarifies when to use Beans vs Linear
Use when starting work, tracking tasks, or deciding where to record discovered work - clarifies when to use TodoWrite vs Beans
Generate implementation task files for a specific layer. Called by /breakdown skill during Phase 4.
Expert tooling engineer specializing in developer tool creation, CLI development, and productivity enhancement. Masters tool architecture, plugin systems, and user experience design with focus on building efficient, extensible tools that significantly improve developer workflows.
Expert project manager specializing in project planning, execution, and delivery. Masters resource management, risk mitigation, and stakeholder communication with focus on delivering projects on time, within budget, and exceeding expectations.
Activate when creating detailed implementation plans with phases, tasks, dependencies, and resource allocation for software projects
Use before implementing when uncertainty exists. Weighted scoring across 5 checks (requires ≥80%). Triggers: "before implementing", "verify readiness", "should I proceed", "am I ready". If thinking "this is overkill" - use it.
Plan layer structure and task groupings from PRD analysis. Called by /breakdown skill during Phase 3.
Expert build engineer specializing in build system optimization, compilation strategies, and developer productivity. Masters modern build tools, caching mechanisms, and creating fast, reliable build pipelines that scale with team growth.
Use when you have a written implementation plan to execute in a separate session with review checkpoints
Expert chaos engineer specializing in controlled failure injection, resilience testing, and building antifragile systems. Masters chaos experiments, game day planning, and continuous resilience improvement with focus on learning from failure.
Use when completing tasks, implementing major features, or before 合併 to verify work meets requirements
Expert Site Reliability Engineer balancing feature velocity with system stability through SLOs, automation, and operational excellence. Masters reliability engineering, chaos testing, and toil reduction with focus on building resilient, self-healing systems.
Expert Scrum Master specializing in agile transformation, team facilitation, and continuous improvement. Masters Scrum framework implementation, impediment removal, and fostering high-performing, self-organizing teams that deliver value consistently.
Use before implementing UI changes or frontend PRs. Enforces TodoWrite with 18+ items. Triggers: "accessibility audit", "WCAG", "Lighthouse", "screen reader", "a11y", "NVDA", "VoiceOver", "keyboard navigation", "focus indicator". For "Core Web Vitals" in frontend/UI context, use this skill. For pure backend/API performance optimization, use performance-optimization instead. If thinking "WIP doesn't need this" - use it anyway.
Assess readiness for compliance audits. Use when a senior developer needs a gap analysis for standards.
Assess and prioritize tech debt items. Use when a senior developer needs an investment plan for debt reduction.
