Meta (skills about skills) Claude Code skills

Anthropic's canonical public skills repo: 17 reference skills, the Agent Skills spec, and a skill template; installable as plugin sets via the built-in marketplace.

Anthropic's official skill for writing skills: scaffolds a SKILL.md with correct frontmatter, structure and intention-revealing supporting files; the recommended starting point before authoring anything by hand.

Anthropic-managed directory auto-available in Claude Code: 26 first-party plugins (feature-dev, hookify, plugin-dev, commit-commands, code-modernization, code-simplifier, claude-md-management, claude-code-setup, mcp-apps, mcp-tunnels, agent-sdk-dev, math-olympiad, playground, learning/explanatory output styles, 8+ LSP language servers) plus 300+ vetted partner plugins (github, linear, playwright, firebase, context7...).

The SKILL.md format published as an open standard: the spec lives in anthropics/skills/spec, and skills written for it run across ~40 adopter clients (Copilot, VS Code, Cursor, Codex, Gemini CLI, Goose...).

Meta-skill for authoring new SKILL.md files to the framework's conventions; the standard way to grow a personal skill library cleanly.

Companion repo of experimental, not-yet-graduated Superpowers skills and techniques; worth watching for what lands in the main framework next.

Curated Agent Skills collection built on the agentskills.io open standard, portable across Claude Code, Cursor, Copilot, Codex, Gemini CLI and 30+ agents; the reference for standards-compliant, cross-agent skills.

Largest raw index of the ecosystem: 2,000,000+ open-source SKILL.md files scraped from public GitHub (2+ stars filter), browsable by 12 domains / 50+ categories, with a free REST API and an MCP server endpoint so Claude Code can query it directly; discovery map only, zero curation, every skill needs your own audit before install.

Vercel-backed cross-platform registry (Claude Code, Cursor, Copilot, Codex) with 918,396 skills, ranked by 8-week activity and real install counts, plus an Official curated section and per-skill security audit transparency; currently the best install-count signal in the ecosystem.

Mid-size curated catalog: 12,868 skills of which 2,643 are official (Anthropic, Microsoft, Google, OpenAI) and 10,225 community, all free, standardized SKILL.md format working across 14+ platforms; good middle ground between raw scrape and hand-picked list.

Directory of marketplaces rather than skills: auto-crawls GitHub daily for repos containing .claude-plugin/marketplace.json and lists 2,500+ marketplace registries plus 21,700+ skills and 12,500+ MCP servers; the place to find which registries exist before subscribing via /plugin marketplace add.

The npm-style versioned registry for OpenClaw agents: publish, version, vector-search SKILL.md packages; ~13,700 skills mid-2026 (up from ~6,500 in January); post-security-crisis it added automated scanning, author verification badges and code signing after removing 1,467 malicious skills, so meaningfully safer but not immune.

Anthropic's own curated plugin directory, the highest-trust source: /plugins maintained internally plus /external_plugins from vetted partners meeting quality and security standards via a submission form; caveat in the README itself that Anthropic does not control bundled MCP servers, so trust-check anyway.

Anthropic-run companion marketplace hosting third-party plugins that passed automated validation and safety screening; lighter bar than the official directory but still a screened channel, and its plugins appear in the Discover tab alongside official ones.

Small hand-curated marketplace (~200+ skills) that runs an 8-point security scan on every listing and pays creators a 70/30 revenue split; the anti-SkillsMP: tiny catalog, high floor; also publishes the best neutral guides on the marketplace landscape.

Aggregated/scraped index of 169,000+ skills with a polished web UI, oriented to the LobeHub agent ecosystem rather than Claude Code specifically; useful as a second large search surface when SkillsMP misses.

Classic awesome-list, 169 hand-curated skills across 13 categories maintained by @BehiSecc, last updated 2026-06-13; the highest signal-to-noise browse if you want quality over volume, including 125+ bioinformatics skills and 65 full-stack framework skills as bundles.

Marketplace referenced as a key collection inside the Awesome Claude Skills directory with 69,000+ skills; mid-tier between curated lists and the mega-scrapes.

Curated bundle of 317 skills across 50+ domains, cited as a key collection by Awesome Claude Skills; a portable one-repo alternative to subscribing to a marketplace.

Submission-based directory (~500 skills) attached to the larger MCP Market, emphasizing skills that pair with MCP servers (scraping, databases, cloud APIs); site rate-limited my fetch (HTTP 429) so figures are from Agensi's April 2026 comparison.

Browsable directory of Claude Code plugin marketplaces, an alternative front-end to the same GitHub marketplace.json crawl claudemarketplaces.com does; seen in search results only, worth a look as a cross-check.

Self-styled professional Claude Code skills marketplace on GitHub with production-ready skills for dev workflows; representative of the single-owner marketplace repos that /plugin marketplace add subscribes to directly.

Central personal marketplace repo by xiaolai, another example of the per-owner registry pattern the /plugin system encourages; quality is whatever the owner maintains, per the general warning that per-owner marketplaces range from excellent to abandoned.

Cross-agent skill directory covering Claude, OpenClaw and GitHub agents; seen in search results only, one more discovery surface for the multi-runtime SKILL.md format.

86+ skills, rules, hooks and agent configs in one collection, a top-3 trending item on claudeskills.info; notable here because Pierre already runs the 67-skill ECC set locally, so the marketplace listing is mainly useful to track upstream updates.

Comprehensive workflow system with 20 development techniques (TDD, planning, debugging, worktrees), the single most-downloaded item on claudeskills.info; already installed locally as the superpowers:* plugin family, marketplace presence confirms it as the ecosystem's flagship collection.

Create Claude Code hooks that block unwanted behaviors by analyzing patterns in your conversation history.

Toolkit for developing Claude Code plugins: creating agents, commands, hooks, MCP integrations, and correct plugin structure.

Maintain CLAUDE.md files: audit quality, capture session learnings, and keep project memory current.

Analyze a codebase and recommend tailored Claude Code automations: hooks, skills, MCP servers, and subagents.

Generate an explorable HTML report of Claude Code session usage from local transcripts: tokens, cache efficiency, subagents, skills, and most expensive prompts.

Reference plugin demonstrating every Claude Code extension surface: commands, agents, skills, hooks, and MCP servers.

Plugin packaging of the skill-creator skill: create, improve, and benchmark skills with evals and variance analysis from inside Claude Code.

Meta-skill for creating new Claude Code skills following best practices, including a methodology for testing the skill itself.

Entry-point skill that establishes how to find and invoke the other skills at the start of any conversation, before any response.

Audits installed skills and commands for quality and staleness.

Interactive installation wizard for setting up the ECC collection itself.

Linter for agent configurations: validates SKILL.md, CLAUDE.md, and hooks with 156 rules and auto-fix.

Review recent Claude Code conversations to propose improvements to CLAUDE.md files.

Ambient guidance for creating, modifying, and debugging Claude Code plugins with schemas and templates.

Discovers and installs agent skills matching a plain-language request ("is there a skill that can X"), acting as the entry point to the skills.sh ecosystem.

Converts any documentation website into an installable Claude skill automatically.

>- Analyze raw prompts, identify intent and gaps, match ECC components (skills/commands/agents/hooks), and output a ready-to-paste optimized prompt. Advisory role only : never executes the task itself. TRIGGER when: user says "optimize prompt", "improve my pro

Use this skill when creating new Claude Code skills from scratch, editing existing skills to improve their descriptions or structure, or converting Claude Code sub-agents to skills. This includes designing skill workflows, writing SKILL.md files, organizing su

Search existing local, marketplace, GitHub, and web skill sources before creating a new skill. Use when the user wants to create, build, fork, or find a skill for a workflow.

Use when auditing Claude skills and commands for quality. Supports Quick Scan (changed skills only) and Full Stocktake modes with sequential subagent batch evaluation.

Ouvre, cherche ou regenere la bibliotheque des skills de Pierre (catalogue interactif de tout ce qui est invocable + carte ecosysteme). Use when user types /skills-library, or asks 'quelles skills', 'liste des skills', 'ouvre la bibliotheque de skills', 'c'est