Claude Code Skills

AI agent skills are reusable instruction sets that extend your assistant with domain-specific expertise, loaded on demand so they don't bloat your context. This repository covers marketing and engineering skills authored by @samber.

For Golang-related skills, please visit cc-skills-golang.

[!IMPORTANT]
Bootstrapped with Claude. Edited, tested, reviewed and reworked by a human.

No AI slop here. AI-made skills are useless.

🚀 How to use?

Install with skills CLI (universal, works with any Agent Skills-compatible tool):

npx skills add https://github.com/samber/cc-skills --skill '*'
# or a single skill:
npx skills add https://github.com/samber/cc-skills --skill promql-cli

Claude Code

/plugin marketplace add samber/cc
/plugin install cc-skills@samber

Openclaw

Copy skills into the cross-client discovery directory:

git clone https://github.com/samber/cc-skills.git ~/.openclaw/skills/cc-skills
# or in workspace:
git clone https://github.com/samber/cc-skills.git ~/.openclaw/workspace/skills/cc-skills

Gemini CLI

gemini extensions install https://github.com/samber/cc-skills

Update with gemini extensions update cc-skills.

Cursor

Copy skills into the cross-client discovery directory:

git clone https://github.com/samber/cc-skills.git  ~/.cursor/skills/cc-skills

Cursor auto-discovers skills from .agents/skills/ and .cursor/skills/.

Copilot

Copy skills into the cross-client discovery directory:

/plugin install https://github.com/samber/cc-skills
# or
git clone https://github.com/samber/cc-skills.git ~/.copilot/skills/cc-skills

Copilot auto-discovers skills from .copilot/skills/.

OpenCode

Copy skills into the cross-client discovery directory:

git clone https://github.com/samber/cc-skills.git ~/.agents/skills/cc-skills

OpenCode auto-discovers skills from .agents/skills/, .opencode/skills/, and .claude/skills/.

Codex (OpenAI)

Clone into the cross-client discovery path:

git clone https://github.com/samber/cc-skills.git ~/.agents/skills/cc-skills

Codex auto-discovers skills from ~/.agents/skills/ and .agents/skills/. Update with cd ~/.agents/skills/cc-skills && git pull.

Antigravity

Clone and symlink into the cross-client discovery path:

git clone https://github.com/samber/cc-skills.git ~/.antigravity/skills/cc-skills

Update with cd ~/.antigravity/skills/cc-skills && git pull.

🧩 Skills

These skills are designed as atomic units, cross-referencing units. A skill may reference conventions defined in another. Installing only a subset will give you a partial and potentially inconsistent view of the guidelines. For best results, install all general-purpose skills together.

Each skill lives in skills/<name>/ with a SKILL.md entry point. The SKILL.md is kept small with internal references to advanced markdown files, so only the relevant content is loaded into context.

• Description (tok): weight of the description field from YAML frontmatter, always loaded into Claude's context for skill triggering
• SKILL.md (tok): weight of the full SKILL.md file loaded when the skill triggers
• Directory (tok): weight of all files in the skill directory (SKILL.md + referenced markdown files)

Skill	Error rate gap	Description (tok)	SKILL.md (tok)	Directory (tok)
conventional-git	-36%	73	1,446	1,446
promql-cli	-39%	87	1,257	6,248
linkedin-ghostwriting	-31%	87	1,045	1,993
substack-ghostwriting	-51%	205	3,315	10,720
technical-article-writer	-33%	147	2,295	5,737
press-release-writer	-34%	149	1,532	17,829
humaniseur-fr	-14%	249	5,895	5,895

🧪 Skill evaluations

	With Skill	Without Skill	Delta
Overall	99%	64%	+35pp

See EVALUATIONS.md for the full per-skill breakdown.

🎯 Tuning Skill Triggers

If a skill triggers too often or not often enough, please open an issue suggesting a description change. The description field in SKILL.md frontmatter is the primary triggering mechanism: small wording adjustments can significantly improve trigger accuracy. Some SKILL.md might have a When to use section which is another level of exclusion. Finally, SKILL.md is an entrypoint for lazy loading references with deep knowledge located in references/.

🔄 Overlap

If your team has its own conventions, create a company skill and declare the override explicitly near the top of its body: This skill supersedes samber/cc-skills@git-convention skill for [company] projects.

✍️ Contribute

• 100 tokens per skill description - what? when to use this skill?
• 1.000–2.500 tokens per SKILL.md — keep the main file focused on essentials
• Use secondary markdown files for depth — reference them from SKILL.md with relative links (e.g., [Logging](./logging.md)). Claude reads these on demand when the topic is relevant, so they don't count against the context budget until needed
• Up to 10.000 tokens for full skill and secondary files
• 2–4 skills loaded simultaneously in a typical session — design skills to coexist
• Stay below ~10k tokens of total loaded SKILL.md anytime to avoid degrading response quality

For more guidelines, please check CLAUDE.md.

💫 Fuel the Revolution

• ⭐️ Star this repo - Your star powers the caffeine engine!
• ☕️ Buy me a coffee - I'll literally use it to build more skills while drinking actual coffee

📝 License

Copyright © 2026 Samuel Berthe.

This project is under MIT license.