CLAUDE

Fires when watched files change on disk.

Fire when settings or CLAUDE.md files change during a session.

Fire before and after context compaction.

Fires when an MCP server requests input from the user.

Run shell scripts on events with environment variable passing.

Use Claude itself to handle hook logic instead of shell scripts.

Spawn subagents to handle complex hook logic.

Run hooks in the background without blocking the session.

Connect external tools and data sources via the open MCP standard.

Local, project, user, and plugin-level MCP configurations.

Deferred tool loading reduces context overhead for large MCP suites.

Pre-configured or dynamic OAuth for remote MCP servers.

Reference and read resources exposed by MCP servers.

Execute MCP prompts as commands via the slash menu.

Receive push messages from MCP servers via channels.

Admin-controlled allow and deny lists for MCP servers.

Coordinate multiple Claude Code instances with a shared task list.

Coordinator agent that assigns tasks and synthesizes findings.

Teammates claim and complete work independently from one list.

Teammates communicate directly without routing through the lead.