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codewhale/docs/CLAUDE_PLUGIN_COMPAT.md
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Hunter B 877b44935e fix(skills): reject multi-skill Claude plugin archives
Document the portable SKILL.md compatibility boundary for Claude Code plugin bundles and keep /skill install from silently flattening plugin archives that carry multiple skills plus plugin.json runtime metadata.

Reported by @AiurArtanis in #2743.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-13 08:20:36 -07:00

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# Claude Plugin Compatibility
CodeWhale treats Claude Code skill folders as instruction bundles when they are
plain `SKILL.md` directories. It does not run Claude Code plugin runtimes.
## Supported
- Workspace or global `.claude/skills/<name>/SKILL.md` directories discovered by
the normal skill registry.
- GitHub or tarball installs that contain one selected skill directory such as
`skills/<name>/SKILL.md`, `.agents/skills/<name>/SKILL.md`,
`.claude/skills/<name>/SKILL.md`, or a nested package layout ending in
`skills/<name>/SKILL.md`.
- Companion files inside the selected skill directory, such as `references/`,
`examples/`, or scripts that are only used after the skill is explicitly
loaded and trusted.
## Not Supported As A Plugin Runtime
Claude Code plugin features remain outside the v0.8.60 compatibility boundary:
- `.claude-plugin/plugin.json` metadata and activation semantics.
- Custom slash-command bundles.
- Plugin build steps, compiled TypeScript agents, dashboard servers, shared
plugin state, or token-gated service processes.
- Frontmatter fields that require Claude-specific runtime behavior, such as
`model: inherit`.
If a Claude Code plugin repository contains multiple skills, install or migrate
one `skills/<name>` directory at a time. `/skill install` rejects multi-skill
plugin archives with a clear message so it never silently chooses one skill and
drops the plugin runtime behavior.
For richer integrations, wrap the plugin's executable surface as MCP, hooks, or
a CodeWhale skill that names the external command explicitly.