Three stop-hook bugs that break loop termination:
- A bare assistant message equal to the promise (e.g. just "DONE") ended
the loop even without <promise> tags: the perl substitution passed the
input through unchanged when the tag was absent. Now the promise text
is only extracted when a <promise>...</promise> tag is present.
- The observed promise text was whitespace-normalized but the expected
promise was not, so a promise containing consecutive spaces
("ALL DONE") could never match and the loop never ended. Both sides
are now normalized identically (trim + collapse runs of whitespace).
- The iteration reader accepted "iteration:1" (no space after the colon)
but the writer's sed only matched "iteration: " with a space, so the
counter froze and the loop ran past max_iterations. The writer now
matches with or without spaces, like the reader.
Adds tests/stop-hook.test.sh covering all three regressions plus
controls; the three bug cases fail on the previous script and pass now.
Fixes anthropics/claude-code#81827
Fixes anthropics/claude-code#81828
Fixes anthropics/claude-code#81829
No-Verification-Needed: shell-script plugin in claude-plugins-official; no claude-cli-internal runtime surface
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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
Plugin names are immutable
The name field in a marketplace entry is an immutable slug. Once a plugin has been published, its name must not change — users have it installed under that slug, and renaming it breaks their install with a plugin-not-found error.
- To change how a plugin is labeled in the UI, set or update
displayNameinstead. - If a rename is genuinely unavoidable, add an entry to the top-level
renamesmap in.claude-plugin/marketplace.jsonso existing installs auto-migrate:
"renames": {
"old-name": "new-name"
}
The Claude Code plugin loader reads this map and transparently rewrites the old slug to the new one on the user's next sync.
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.