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ClaudSkills / General / plugins-extensions

Extension API

Category: General  ·  Sub-category: plugins-extensions  ·  Last updated:
Extension API for domain bundle discovery, module detection, and canonical command generation

From the source SKILL.md

Unified API for domain bundle extensions providing module discovery, build system detection, and command generation. Provides the ExtensionBase abstract base class that all domain extensions must inherit from.

What this skill does

Extension API is a community-contributed Claude Code skill in the plugins-extensions sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/extension-api/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Extension API Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 70,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/extension-api
curl -L https://claudskills.com/skills/extension-api/SKILL.md \
  -o ~/.claude/skills/extension-api/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/extension-api/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/extension-api/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\extension-api\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
ClaudSkills. (2026). Extension API [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/extension-api/
BibTeX
@misc{extension-api-2026,
  author    = {ClaudSkills},
  title     = {Extension API [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/extension-api/}
}

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