How do I find and install a Claude SEO skill from GitHub?

Three Claude Code paths from GitHub: (1) /plugin marketplace add owner/repo then /plugin install plugin-name@marketplace-name; (2) copy a SKILL.md folder into ~/.claude/skills/<name>/ (personal) or .claude/skills/<name>/ (project); (3) clone + run the repo installer when the README provides one. Prefer official Anthropic catalogs for docs/examples - anthropic-agent-skills has no SEO-named plugin as of 2026-09-18. Worked third-party example (MIT, not Anthropic): AgriciDaniel/claude-seo then claude-seo@agricidaniel-claude-seo. This page is discovery + install, not pick-order - see What Claude SEO skills to install first.

When to use / when not

Use when you found a GitHub SEO skill/plugin and need the Claude Code install path, plus a license/freshness gate before stars.

Not for:

• Choosing which SEO skills first - install-first SEO
• Building your own marketplace (out of scope)
• Star counts as product truth
• Expecting anthropics/skills to list an SEO plugin today

Find candidates safely

Source quality before install.

1. Prefer .claude-plugin/marketplace.json + LICENSE + recent commits.
2. Official first for non-SEO jobs: anthropics/skills / claude-plugins-official - then a trusted SEO GitHub marketplace.
3. Search filename:SKILL.md + SEO terms - skim description/README, not stars.
4. Note license (MIT/Apache vs source-available) before you run anything.

Workflow - install from GitHub

Pick one path and finish one install.

1. Decide path

2. Marketplace path (preferred when a catalog exists)

/plugin marketplace add owner/repo
/plugin marketplace list
/plugin install plugin-name@marketplace-name

Choose user / project / local scope if prompted (Discover plugins). If the summary says reload: /reload-plugins (--force only when docs warn about prompt cache). Official-catalog deep-dive: How do I add Anthropic skills marketplace.

3. Worked SEO example (third-party MIT - verified 2026-09-15; re-checked 2026-09-18)

Not an Anthropic product. IDs from AgriciDaniel/claude-seo README + marketplace.json same day:

/plugin marketplace add AgriciDaniel/claude-seo
/plugin install claude-seo@agricidaniel-claude-seo
/seo setup

Optional: /seo doctor. Manual (inspect before run): git clone --depth 1 https://github.com/AgriciDaniel/claude-seo.git then bash claude-seo/install.sh (Unix) or install.ps1 (Windows). Prefer inspect-then-run over pipe-to-shell.

4. Skills-dir path (bare SKILL.md repo)

Copy the directory to ~/.claude/skills/<name>/ or .claude/skills/<name>/. Confirm SKILL.md at folder root; invoke /<name> or natural-language match. No marketplace step for a bare folder (Skills docs).

5. Smoke test + hygiene

Run one job. If the listing feels heavy, prune with skill-doctor. Optional: plugin eval.

Official vs SEO GitHub - what anthropic-agent-skills ships

From marketplace.json on 2026-09-18 - five plugins; none SEO-named:

Add: /plugin marketplace add anthropics/skills. Install: /plugin install <name>@anthropic-agent-skills. Use for documents/examples - not as an SEO directory.

Stack - where the skill lives

Plugin skills are namespaced; personal/project skills live under ~/.claude/skills/ or .claude/skills/. Official marketplaces (claude-plugins-official, anthropic-agent-skills, community) are not the same as third-party GitHub catalogs - only install from sources you trust. Claude.ai / Cowork upload is a different surface. Optional Growth map: Claude for marketing. SEO systems pillar: Claude for SEO (jobs and workflows, not install paths).

Pitfalls + quality bar

• Invented plugin IDs or @marketplace suffixes not in marketplace.json / README
• Assuming anthropics/skills includes SEO skills
• Install before marketplace add leads to marketplace-not-found
• Star-chasing without license/freshness
• Duplicating install-first SEO criteria here
• Trust: Anthropic does not control third-party plugin contents (discover-plugins)

Prompts (copy-paste)

1 - Verify marketplaces

List my Claude Code plugin marketplaces and show whether any SEO-related marketplace is registered.

2 - Confirm SEO plugin

I installed `claude-seo@agricidaniel-claude-seo`. Confirm the plugin is enabled and what top-level `/seo` commands it exposes.

3 - Smoke-test one job

Using my installed SEO skill/plugin, run a single-page check on `https://example.com` and list only critical findings.

More copies live in the workspace prompts.md pack for this slug.

FAQ

Does Anthropic skills marketplace include an SEO skill?

No SEO-named plugin in anthropic-agent-skills as of 2026-09-18 (document-skills, example-skills, claude-api, academy-guide, discernment-nudge).

Marketplace add vs copying into ~/.claude/skills/?

Marketplace when the repo ships a plugin catalog; skills-dir for a single SKILL.md folder (personal or project).

What is a verified example install for SEO from GitHub?

Third-party MIT: add AgriciDaniel/claude-seo, install claude-seo@agricidaniel-claude-seo (re-verify same day - not Anthropic).

Do I need /reload-plugins?

Only if the install summary says so (discover-plugins).

Is this the same as what SEO skills to install first?

No - that page owns pick-order; this page owns GitHub discovery + install paths.

Conclusion

• Verify source, choose one path, one install, smoke-test one job, skill-doctor if needed

Next: SEO skills to install first · add anthropics/skills marketplace · skill-doctor. Deeper SEO systems: Claude for SEO.

Sources (checked 2026-09-15; re-verified 2026-09-18)

• Skills - personal / project / plugin paths
• Discover and install plugins - add/install, scope, reload, trust
• anthropics/skills marketplace.json - anthropic-agent-skills; five plugins; no SEO-named plugin
• AgriciDaniel/claude-seo README + marketplace.json - third-party MIT; marketplace agricidaniel-claude-seo; plugin claude-seo