This skill should be used when selecting CrewAI built-in tools, composing agent toolchains, or creating production-ready custom tools with BaseTool or @tool, including schema validation, dependency management, caching, async support, and testing.
Enforces a 4-phase architecture design workflow by reading .arch/state.json on every request to gate responses by phase. Phase 1 extracts and validates requirements from PRDs; Phase 2 selects architecture patterns and establishes high-level structure; Phase 3 designs and accepts components sequentially; Phase 4…
Knowledge base for architecture patterns, trade-offs, and selection criteria. Activates when recommending or evaluating architecture patterns like microservices, monolith, serverless, event-driven, CQRS, or hybrid approaches.
Manages architecture project state in .arch/state.json and .arch/decisions.md. Use when reading or updating project phase state, checking architecture status or project progress, asking "what phase are we in", tracking component acceptance, recording or logging decisions, or validating phase transitions.
Design Graph — the artifact: annotated call graph of a concrete problem; nodes = functions, edges = data flow; every node annotated with A, cardinality, E, R. Use when drawing a graph before writing code or reconstructing and diffing one against existing code. Includes the completeness checklist.
Graph Protocol — notation spec for Design Graphs. Fixed sections (PROBLEM, SHAPES, GRAPH, CARDINALITY, BOUNDARIES, BEHAVIOR, SCOPE, TEST LAYERS, VERDICT) and fixed markers (⟳retry ↯escape ☠die 🔒boundary (1)(N)(T) ⛈layer @scope). Use when writing, reviewing, or checking any Design Graph so notation is mechanically…
A Chinese-language review workflow for diagnosing Douyin video data. Douyin is a Chinese short-video platform, and the workflow focuses on saved videos, new followers, and selection for Douyin's featured content.
AI Agent-driven Kaggle competition workflow. Learn from real competition experience: score stabilization patterns, submission troubleshooting, kernel workflows, GPU task delegation, and the spec-driven development approach that achieved top leaderboard positions. Use when: working on any Kaggle competition, analyzing…
Opt-in onboarding for the mARC agent team. Scaffolds a per-repo team binding so the team graduates from ephemeral session-memory to persistent, versioned config — without ever writing a file silently. Discovers the repo's org/repo/ project at runtime via gh, prefills {{ agentsdir }}/team.toml, and (optionally) a lean…
Channel operator (IRC handle @techlead) for the mARC agent team. Compiles chat demands into ready-to-execute work, records them on the GitHub Project board/Issues, and dispatches to specialists (@dev, @sre, @design, @sec, @rev, @research). Invoke with /tech-lead to turn discussion into tracked, delegated tasks.
Click-first picker over the design domain (41 sub-skills). User picks an intent in one click — we route to the right sub-skill or agent. No text menus, no numbered lists.
Multi-agent orchestration — launch parallel Sonnet agents in git worktrees to fan out, pipeline, or compete on a task. Use when the user types $ccc-fleet, /ccc fleet,…
Feature planning flow for CC Commander. Runs a structured 3-5 question spec interview, then delegates to the planner agent in the background to write an…
React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance…
This skill should be used when the user asks to "create a slash command", "add a command", "write a custom command", "define command arguments", "use command frontmatter", "organize commands", "create command with file references", "interactive command", "use AskUserQuestion in command", or needs guidance on slash…
This skill should be used when the user asks to "create a hook", "add a PreToolUse/PostToolUse/Stop hook", "validate tool use", "implement prompt-based hooks", "use ${CLAUDEPLUGINROOT}", "set up event-driven automation", "block dangerous commands", or mentions hook events (PreToolUse, PostToolUse, Stop, SubagentStop…
This skill should be used when the user asks to "create a skill", "write a skill", "edit a skill", "update a skill", "improve skill description", "add skill to plugin", "organize skill content", "create SKILL.md", "skill frontmatter", "skill structure", "progressive disclosure", or needs guidance on skill development…
Add burned-in subtitles to a video the user uploads or points to on disk. Use when the user provides a local video file (mp4/mov/etc.) and wants captions/subtitles added to it. Transcribes the audio with Whisper and burns styled captions directly into the video.
Extract the most controversial or genuinely-novel insights from a YouTube video and output them both as a .txt file and printed in the terminal. Use when the user provides a YouTube URL and wants the key ideas, hot takes, or original thinking — NOT video clips. Optionally cross-checks ideas against the web to judge…
Extract the most meaningful, engaging clips from YouTube videos. Use when user provides a YouTube URL and wants to find highlights, best moments, controversial takes, or valuable segments. Supports specifying number of clips or topic focus.
Regression testing strategies for AI-assisted development. Sandbox-mode API testing without database dependencies, automated bug-check workflows, and patterns to catch AI blind spots where the same model writes and reviews code.
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At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: