Claude Agent SDK 0.3.296

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 a subagent can auto-compact earlier than the main conversation's window
• Fixed the sandbox option discarding an inline settings.sandbox block: the two now merge, the option's values win, and deny and credential lists from both sides are combined
• Changed the default limit on MCP tool descriptions sent up front and on MCP server instructions, in-process SDK servers included, from 2,048 to 4,096 characters
• Changed permission answers that arrive after a restart to be parsed like live ones: over 4,096 updatedPermissions entries count as a denial, and a malformed list is ignored as a whole
• Updated to parity with Claude Code v2.1.296

Update

npm install @anthropic-ai/claude-agent-sdk@0.3.296
# or
yarn add @anthropic-ai/claude-agent-sdk@0.3.296
# or
pnpm add @anthropic-ai/claude-agent-sdk@0.3.296
# or
bun add @anthropic-ai/claude-agent-sdk@0.3.296