Install the Skills Catalog

Nullstone skills follow the Agent Skills open standard, so the same skill works unmodified across the ~30 tools that support it — Claude Code, OpenAI Codex, Cursor, Gemini CLI, and others. Pick the channel that matches your agent.

Channel	Best for	Upgrade
Claude Code plugin	Claude Code users	/plugin marketplace update
skills.sh	Codex, Cursor, and other Agent Skills tools	re-run npx skills add
Manual copy	Pinning a version, air-gapped setups	git pull + re-copy

Claude Code plugin (recommended)

The catalog is published as a Claude Code plugin via its own marketplace. One install picks up every skill, with versioned upgrades:

/plugin marketplace add nullstone-io/agent-skills
/plugin install nullstone-skills@nullstone

Skills are namespaced as nullstone-skills:<skill-name> and invoked automatically when their description matches a request. To upgrade after a new release, refresh the marketplace and reload:

/plugin marketplace update nullstone
/reload-plugins

(Or enable auto-update for the marketplace in the /plugin manager to pick up new releases at startup.)

MCP server is separate

The plugin ships the skills (conventions). The MCP server (actions) ships with the CLI as nullstone mcp-server — see Install MCP. Most teams install both.

Cross-tool installer

For Codex, Cursor, and other Agent Skills tools, skills.sh installs the catalog from a single command. It reads straight from the GitHub repo:

npx skills add nullstone-io/agent-skills

Re-run the same command to pick up updates.

Manual install

For pinning a specific version, air-gapped machines, or pulling in just one skill without an installer. Copy the skill directory into the location your tool reads skills from. For Claude Code that is:

• ~/.claude/skills/<skill-name>/ — available in every session on your machine.
• <project>/.claude/skills/<skill-name>/ — scoped to one project.

# Clone the catalog into a side location.
git clone https://github.com/nullstone-io/agent-skills.git ~/.claude/agent-skills

# Copy the skills you want. (Omit the `_template` directory.)
mkdir -p ~/.claude/skills
cp -R ~/.claude/agent-skills/skills/nullstone-config-files ~/.claude/skills/

Verify by running claude and listing skills — nullstone-config-files should appear.

Upgrading

cd ~/.claude/agent-skills
git pull
# Re-copy the skill directories you want to update.
cp -R skills/nullstone-config-files ~/.claude/skills/

Uninstalling

rm -rf ~/.claude/skills/nullstone-config-files

Project-scoped installs

To apply a skill only inside one repo (e.g. to pin a specific catalog version for that project):

mkdir -p /path/to/your/repo/.claude/skills
cp -R ~/.claude/agent-skills/skills/nullstone-config-files /path/to/your/repo/.claude/skills/

Commit .claude/skills/ if you want the entire team to share the same skill version.