Morgan Westlee Lunt d44da81146
code-modernization: second-order injection fencing, path guards, scoped scaffolder agent
Addresses automated security review of the workflow conversion:

- Agent-produced text (rule specs, finding descriptions, dedup lists) is
  fenced as untrusted data when interpolated into downstream agent prompts,
  with embedded fence markers stripped so the fence can't be escaped;
  referees and judges are told to re-derive claims from the cited code.
- system/service/subdir names that land in filesystem paths inside prompts
  are validated against a strict pattern — traversal-shaped values throw
  before any agent spawns.
- Reimagine scaffolding now uses a dedicated 'scaffolder' agent with an
  explicit minimal tool list, a single-directory write scope, and the
  untrusted-content discipline extended to the generated spec/architecture
  docs it builds from (they derive from untrusted legacy code).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-06-09 19:40:58 +00:00
2025-11-20 14:26:30 -08:00

Claude Code Plugins Directory

A curated directory of high-quality plugins for Claude Code.

⚠️ Important: Make sure you trust a plugin before installing, updating, or using it. Anthropic does not control what MCP servers, files, or other software are included in plugins and cannot verify that they will work as intended or that they won't change. See each plugin's homepage for more information.

Structure

  • /plugins - Internal plugins developed and maintained by Anthropic
  • /external_plugins - Third-party plugins from partners and the community

Installation

Plugins can be installed directly from this marketplace via Claude Code's plugin system.

To install, run /plugin install {plugin-name}@claude-plugins-official

or browse for the plugin in /plugin > Discover

Contributing

Internal Plugins

Internal plugins are developed by Anthropic team members. See /plugins/example-plugin for a reference implementation.

External Plugins

Third-party partners can submit plugins for inclusion in the marketplace. External plugins must meet quality and security standards for approval. To submit a new plugin, use the plugin directory submission form.

Plugin Structure

Each plugin follows a standard structure:

plugin-name/
├── .claude-plugin/
│   └── plugin.json      # Plugin metadata (required)
├── .mcp.json            # MCP server configuration (optional)
├── commands/            # Slash commands (optional)
├── agents/              # Agent definitions (optional)
├── skills/              # Skill definitions (optional)
└── README.md            # Documentation

Skill-bundle plugins

When a plugin's source repository ships skills (SKILL.md files) without a .claude-plugin/plugin.json manifest, the marketplace entry can declare the skills directly using strict: false and an explicit skills array.

{
  "name": "example-bundle",
  "description": "Brief description of the bundled skills.",
  "author": { "name": "Author Name" },
  "category": "development",
  "source": {
    "source": "git-subdir",
    "url": "https://github.com/example-org/sdk.git",
    "path": "packages/agent-skills",
    "ref": "main",
    "sha": "<commit sha>"
  },
  "strict": false,
  "skills": [
    "./skill-a",
    "./skill-b",
    "./skill-c"
  ],
  "homepage": "https://github.com/example-org/sdk"
}

Each path in skills is relative to source.path and points at a directory containing a SKILL.md. Paths can reach deeper than a single level — for example, ["./libA/skill-1", "./libB/skill-2"] exposes a curated subset across multiple library subdirectories. Each skill is registered as <plugin-name>:<skill-name> in Claude Code.

For the underlying schema, see Strict mode in the marketplace documentation.

License

Please see each linked plugin for the relevant LICENSE file.

Documentation

For more information on developing Claude Code plugins, see the official documentation.

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Official, Anthropic-managed directory of high quality Claude Code Plugins.
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