feat: add missing hook events and fix existing hook fields#545
Merged
ashwin-ant merged 7 commits intomainfrom Feb 3, 2026
Merged
feat: add missing hook events and fix existing hook fields#545ashwin-ant merged 7 commits intomainfrom
ashwin-ant merged 7 commits intomainfrom
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Add support for previously missing hook event types: - Notification, SessionStart, SessionEnd, SubagentStart, PermissionRequest, and Setup hook events and their inputs - Corresponding hook-specific output types for each new event Update existing hook types with new fields: - Add tool_use_id to PreToolUse and PostToolUse hook inputs - Add additionalContext to PreToolUseHookSpecificOutput - Add updatedMCPToolOutput to PostToolUseHookSpecificOutput - Add agent_id, agent_transcript_path, agent_type to SubagentStopHookInput Remove outdated comment about SDK not supporting certain hook events. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
ashwin-ant
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wolffiex
approved these changes
Feb 3, 2026
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Summary
Add 3 new hook events to
HookEvent(Notification,SubagentStart,PermissionRequest) with their input/output types. Also fix missing fields on existing hooks.New hook events
Notification— withNotificationHookInputandNotificationHookSpecificOutputSubagentStart— withSubagentStartHookInputandSubagentStartHookSpecificOutputPermissionRequest— withPermissionRequestHookInputandPermissionRequestHookSpecificOutputFixed fields on existing hooks
PreToolUseHookInput: addedtool_use_idPostToolUseHookInput: addedtool_use_idSubagentStopHookInput: addedagent_id,agent_transcript_path,agent_typePreToolUseHookSpecificOutput: addedadditionalContextPostToolUseHookSpecificOutput: addedupdatedMCPToolOutputNot included
SessionStart,SessionEnd, andSetupare not added — they fire in the CLI before the SDK connection is established, so SDK callbacks for them would never execute.Tests
PreToolUse(additionalContext, tool_use_id),PostToolUse(tool_use_id),Notification, and multi-hook registration