The startup takeover guard SIGTERMed any live bot.pid holder, so starting a second Claude Code session stole the Telegram polling slot from the session already using it — and when that second session exited, no poller remained at all and the bot went permanently silent (anthropics/claude-code#81571). Replace the kill-on-startup pattern with cooperative slot ownership: - slot free (no pid file, holder dead, or pid recycled to an unrelated process — identity-checked via /proc cmdline or ps args) → claim and poll - live healthy holder → standby: outbound tools stay fully usable, and a watcher claims the slot the moment the holder exits, so the channel hands off to the last session standing instead of dying - nothing is ever killed; genuinely orphaned pollers are already reaped by the stdin orphan watchdog, and the pid file is removed by its owner on shutdown Adds a regression test (bun test external_plugins/telegram/test) that spawns two real servers against an isolated state dir: the second must not kill the first, the slot must hand off when the holder exits, and the pid file must be cleaned up by the last server out. Fails on 0.0.7, passes on 0.0.8. Fixes anthropics/claude-code#81571 No-Verification-Needed: fix is in the plugins repo; verified by its own regression test plus a two-session CLI e2e
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.