Claude Agent SDK changelog & release notes

What's changed Added claude_code_version to the initialize control response so clients know the CLI version before the first turn Added autoCompactWindow to AgentDefinition , so…

What's changed Added overageEnabled to SDKRateLimitInfo : on usage-limit warnings, whether the account has extra usage turned on Fixed an MCP server added with mcp_set_servers…

What's changed Updated to parity with Claude Code v2.1.294 Update npm install @anthropic-ai/claude-agent-sdk@0.3.294 # or yarn add @anthropic-ai/claude-agent-sdk@0.3.294 # or…

What's changed Added an optional subagent_type to background_tasks_changed task entries, so hosts can name each subagent's type without pairing with task_started Updated to…

What's changed Added agent_id to the assistant and user messages a subagent produces; it equals the task_id on that subagent's task events and stays the same when the subagent is…

What's changed Updated to parity with Claude Code v2.1.291 Update npm install @anthropic-ai/claude-agent-sdk@0.3.291 # or yarn add @anthropic-ai/claude-agent-sdk@0.3.291 # or…

What's changed Added an optional offset field to the WebFetch tool input for reading on through long pages Fixed failed Claude in Chrome tool calls dropping the result's _meta :…

What's changed Updated to parity with Claude Code v2.1.289 Update npm install @anthropic-ai/claude-agent-sdk@0.3.289 # or yarn add @anthropic-ai/claude-agent-sdk@0.3.289 # or…

What's changed Updated to parity with Claude Code v2.1.288 Update npm install @anthropic-ai/claude-agent-sdk@0.3.288 # or yarn add @anthropic-ai/claude-agent-sdk@0.3.288 # or…

What's changed Added optional remote-session latency fields ( first_text_post_queue_wait_ms , first_text_post_queued_behind ) to the success result message Fixed…