feature
Claude Code

Claude Code enhances plugin hook system with new developer capabilities

code.claude.comagent

Plugin developers gain access to serverToolUses in turn.step hooks, agentId in tool.check events, and new ThemeKey and Color types for UI customization. These additions provide more detailed insight into agent operations and improve mod development capabilities.

Stacks this affects

Claude Code ships in 4 tested stacks here.

Claude Code MCP setup
Code · Agent setup
$50/mo
Claude Code setup
Code · Agent setup
$50/mo
Claude Code only
Code · Workflow
$50/mo
Ship code with AI
Code · Workflow
$50/mo
All Claude Code changes and pricing

More Claude Code

releaseClaude Haiku 5.5 released as default Haiku modelfeatureTool schema registration supports immediate prompt listingfeatureAgent tool now accepts effort parameter for subagent configurationfeaturePrompt caching support added to mod $.model.complete APIfeatureWorkflow agents now available in agent.spawn mod hookfeaturePlugin install command gains --marketplace source parameter