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docs: add skills.sh marketplace documentation (v3.11.5)

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Added comprehensive documentation for skills.sh (Vercel Labs) marketplace:

Section 5.5 (Skills Marketplace):
- Installation instructions (npx add-skill <owner/repo>)
- Top skills by category (Frontend, Database, Auth, Testing)
- Format compatibility (100% compatible with .claude/skills/)
- Status & trade-offs (community project, early stage)

Section 11.3 (Skills Distribution Platforms):
- Comparison: skills.sh vs claude-code-templates vs SkillsMP
- When to use each platform (discovery, installation, team-specific)

Updated files:
- guide/ultimate-guide.md: New subsection Skills Marketplace (~line 5172)
- guide/ai-ecosystem.md: New section 11.3 Skills Distribution Platforms
- machine-readable/reference.yaml: Added 7 skills_marketplace_* entries
- README.md: Added skills.sh to Complementary Resources table
- CHANGELOG.md: Detailed entry for v3.11.5
- VERSION: Bumped to 3.11.5
- guide/cheatsheet.md: Version sync

Marketplace stats (Jan 23, 2026):
- 200+ skills available
- Top skill: vercel-react-best-practices (35K+ installs)
- 20+ agents supported (Claude Code, Cursor, Copilot, etc.)
- Launched: January 21, 2026 by Vercel Labs

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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Florian BRUNIAUX 2026-01-23 18:21:15 +01:00
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---
## 11.3 Skills Distribution Platforms
For discovering and distributing agent skills beyond local creation:
### skills.sh (Vercel Labs)
**URL**: [skills.sh](https://skills.sh/) | **GitHub**: [vercel-labs/agent-skills](https://github.com/vercel-labs/agent-skills) | **Launched**: January 21, 2026
**What it is**: Centralized marketplace for agent skills with one-command installation. Provides leaderboard, trending view, and 200+ skills from Vercel, Anthropic, Supabase, and community contributors.
**Installation**:
```bash
npx add-skill vercel-labs/agent-skills # React/Next.js (35K+ installs)
npx add-skill supabase/agent-skills # Postgres patterns
npx add-skill anthropics/skills # Frontend design + skill-creator
```
**Supported agents**: 20+ including Claude Code, Cursor, GitHub Copilot, Windsurf, Cline, Goose
**Status**: Community project (Vercel Labs), very recent (Jan 2026), rapid adoption but early stage
**Format**: 100% compatible with Claude Code's `.claude/skills/` structure (SKILL.md + YAML frontmatter)
### claude-code-templates (GitHub)
**URL**: [github.com/davila7/claude-code-templates](https://github.com/davila7/claude-code-templates) | **Stars**: 17K+
**What it is**: GitHub-based distribution of full workflows (agents + commands + hooks + skills). Focuses on complete project templates rather than individual skills.
**Installation**: Clone and copy templates manually
**Status**: Established community resource, broader scope than skills.sh (includes entire `.claude/` configurations)
### SkillsMP (Community Index)
**URL**: [skillsmp.com](https://skillsmp.com/)
**What it is**: Community-driven index of 7000+ skills with AI-evaluated rankings (S/A/B/C tiers)
**Focus**: Discovery and cataloging, broader ecosystem than just Claude Code
### When to Use
| Use Case | Platform |
|----------|----------|
| Discover popular framework skills | skills.sh (leaderboard) |
| One-command install official skills | skills.sh (Vercel React, Supabase) |
| Full workflow templates | claude-code-templates |
| Team-specific/internal skills | GitHub repos (custom) |
| Enterprise custom skills | Local `.claude/skills/` |
### Integration with This Guide
See [Section 5.5: Skills Marketplace](./ultimate-guide.md#skills-marketplace-skillssh) for:
- Detailed installation instructions
- Top skills by category (Frontend, Database, Auth, Testing)
- Format compatibility details
- Trade-offs and recommendations
---
## 12. Context Packing Tools
When working with LLMs on large codebases, **context packing** refers to techniques for extracting and feeding relevant code context to the model efficiently.

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@ -6,7 +6,7 @@
**Written with**: Claude (Anthropic)
**Version**: 3.11.4 | **Last Updated**: January 2026
**Version**: 3.11.5 | **Last Updated**: January 2026
---
@ -424,4 +424,4 @@ where.exe claude; claude doctor; claude mcp list
**Author**: Florian BRUNIAUX | [@Méthode Aristote](https://methode-aristote.fr) | Written with Claude
*Last updated: January 2026 | Version 3.11.4*
*Last updated: January 2026 | Version 3.11.5*

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@ -10,7 +10,7 @@
**Last updated**: January 2026
**Version**: 3.11.4
**Version**: 3.11.5
---
@ -5169,6 +5169,95 @@ For comprehensive DevOps/SRE workflows, see **[DevOps & SRE Guide](./devops-sre.
**Quick Start**: [Agent Template](../examples/agents/devops-sre.md) | [CLAUDE.md Template](../examples/claude-md/devops-sre.md)
### Skills Marketplace: skills.sh
**URL**: [skills.sh](https://skills.sh/) | **GitHub**: [vercel-labs/agent-skills](https://github.com/vercel-labs/agent-skills) | **Launched**: January 21, 2026
Skills.sh (Vercel Labs) provides a centralized marketplace for discovering and installing agent skills with one-command installation:
```bash
npx add-skill vercel-labs/agent-skills # React/Next.js best practices (35K+ installs)
npx add-skill supabase/agent-skills # Postgres optimization patterns
npx add-skill anthropics/skills # Frontend design + skill-creator
```
#### How It Works
**Installation**: Skills are copied to `~/.claude/skills/` (same format as this guide)
**Supported agents**: 20+ including Claude Code, Cursor, GitHub Copilot, Windsurf, Cline, Goose, and others
**Format**: Standard SKILL.md with YAML frontmatter (100% compatible with Section 5.2-5.3)
#### Top Skills by Category (January 2026)
| Category | Top Skills | Installs | Creator |
|----------|-----------|----------|---------|
| **Frontend** | vercel-react-best-practices | 35K+ | vercel-labs |
| | web-design-guidelines | 26.6K | vercel-labs |
| | frontend-design | 5.6K | anthropics |
| **Database** | supabase-postgres-best-practices | 1K+ | supabase |
| **Auth** | better-auth-best-practices | 2K+ | better-auth |
| **Testing** | test-driven-development | 721 | obra |
| **Meta** | skill-creator | 3.2K | anthropics |
Full catalog: [skills.sh leaderboard](https://skills.sh/)
#### Status & Trade-offs
**Status**: Very recent (launched Jan 21, 2026), rapid adoption but early stage
**Governance**: Community project by Vercel Labs (not official Anthropic). Skills contributed by Vercel, Anthropic, Supabase, and community members.
**Trade-offs**:
- ✅ Centralized discovery + leaderboard (200+ skills)
- ✅ One-command install (vs manual GitHub clone)
- ✅ Format 100% compatible with this guide
- ⚠️ Multi-agent focus (not Claude Code specific)
- ⚠️ Early stage (maturity to prove over time)
#### When to Use
| Use Case | Recommendation |
|----------|----------------|
| **Discover popular patterns** | skills.sh (leaderboard, trending) |
| **Install official framework skills** | skills.sh (Vercel React, Supabase, etc.) |
| **Team-specific/internal skills** | GitHub repos (like [claude-code-templates](https://github.com/davila7/claude-code-templates), 17K⭐) |
| **Custom enterprise skills** | Local `.claude/skills/` (Section 5.2-5.3) |
#### Installation Examples
**Standard installation** (global, all Claude Code sessions):
```bash
# Install Vercel bundle (3 skills: react + web-design + deploy)
npx add-skill vercel-labs/agent-skills
# Install Supabase Postgres patterns
npx add-skill supabase/agent-skills
# Verify installation
ls ~/.claude/skills/
# Output: react-best-practices/ web-design-guidelines/ vercel-deploy/
```
**Manual installation** (project-specific):
```bash
# Clone from GitHub
git clone https://github.com/vercel-labs/agent-skills.git /tmp/agent-skills
# Copy specific skill
cp -r /tmp/agent-skills/react-best-practices .claude/skills/
# Claude Code auto-discovers skills in .claude/skills/
```
#### References
- [Vercel Changelog: Introducing Agent Skills](https://vercel.com/changelog/introducing-skills-the-open-agent-skills-ecosystem)
- [GitHub: vercel-labs/agent-skills](https://github.com/vercel-labs/agent-skills)
- [Platform Claude Docs: Skill Best Practices](https://platform.claude.com/docs/en/agents-and-tools/agent-skills/best-practices)
- See also: [AI Ecosystem Guide](./ai-ecosystem.md) for complementary tools
---
# 6. Commands
@ -13989,4 +14078,4 @@ Thumbs.db
**Contributions**: Issues and PRs welcome.
**Last updated**: January 2026 | **Version**: 3.11.4
**Last updated**: January 2026 | **Version**: 3.11.5