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The canonical install block
One install story, one wording. README.md, .changeset/*, and every page under docs/ must say this and nothing else. Change it here first, then propagate.
mattpocock-skills is listed in Claude Code's official marketplace — configured name claude-plugins-official, source repo anthropics/claude-plugins-official — which every Claude Code install has out of the box. There is no marketplace to add first. Official Anthropic marketplaces have auto-update enabled by default (discover-plugins), so "updates arrive automatically" is a true claim, not a hope.
Claude Code — the plugin
claude plugins install mattpocock-skills
Or, from inside a session:
/plugin install mattpocock-skills
It's in Claude Code's official marketplace, so there's nothing to add first, and updates arrive automatically.
Codex, and other agents — skills.sh
The plugin is Claude Code only. Everywhere else, skills.sh copies editable skill files into the project. Use the whole-set form on README.md:
npx skills@latest add mattpocock/skills
Pick the skills you want, and which coding agents to install them on. The installer lets you choose which skills to take — make sure setup-matt-pocock-skills is one of them.
…and the single-skill form wherever one skill is named on its own. Note that docs/ pages are not a consumer of this block: ai-hero renders the install widget above the body, so a page that writes the commands out duplicates it. See writing-docs.md.
npx skills@latest add mattpocock/skills --skill=<name>
npx skills@latest update <name>
skills@latest is the pinned spelling in all three. The pages under docs/ used to carry their own copy of these commands; those blocks are now deleted rather than corrected, because the site renders the install commands itself.
The two routes are exclusive
The plugin is a managed, read-only bundle you subscribe to. skills.sh writes files you own and edit. Installing both leaves the user with every skill twice — always say "pick one".
Not the install story
.claude-plugin/marketplace.json makes the repo its own single-plugin marketplace (/plugin marketplace add mattpocock/skills, then /plugin install mattpocock-skills@mattpocock). The official listing supersedes it. It is kept as a fallback for installing the repo directly — an unreleased commit, or a fork — and is not documented to users.