CLAUDE

Create reusable subagent definitions at project or user level.

Configure model, tools, MCP, skills, memory, and scoping.

Limit which tools a subagent can access.

Route specific MCP servers only to specific subagents.

Auto-memory that persists across multiple subagent invocations.

Prevent bloating the main conversation with research or exploration.

Continue a subagent's work across sessions.

Event-driven automation with 20+ lifecycle events.

Fires when a session begins; load env vars and initialize state.

Fires when a session terminates.

Fires before Claude processes user input; can validate or block.

Fires when a slash command expands; can block or inject context.

Fires before any tool executes. Allow, deny, defer, or modify the call.

Fires after a successful tool call. Good for feedback and follow-ups.

Fires on tool execution errors for logging, alerting, and retry.

Fires when a permission dialog appears. Auto-approve or auto-deny.

Fires when auto mode or a rule denies an action.

Fire when subagents spawn and finish.

Fire on task lifecycle events.

Fires when Claude finishes responding. Can prevent the stop.