Claude Agent SDK 0.3.300

What's changed

• Fixed importSessionToStore skipping transcript rows that contain a Unicode line or paragraph separator (U+2028, U+2029) on Node 24 and Bun
• Fixed a background subagent's final report in auto mode being joined into one turn with another message from the same subagent; the report now always runs as its own turn
• Fixed rewind_conversation with interrupt_if_running stopping the running turn before refusing with "unseen later turn"
• Reverted canUseTool options carrying suppressAlwaysAllowRule: true for connector tools that an organization set to require approval (added in 0.3.292)
• Improved the browser SDK bundle (@anthropic-ai/claude-agent-sdk/browser): 40% smaller to download, by no longer bundling a Node crypto polyfill
• Changed thinking: { type: 'disabled' } and maxThinkingTokens: 0 to run as adaptive thinking on models that can't turn thinking off
• Changed updatedInput from PreToolUse and PermissionRequest hook callbacks: it is now validated like Claude's own input and unknown keys are dropped; canUseTool is unchanged
• Updated to parity with Claude Code v2.1.300

Update

npm install @anthropic-ai/claude-agent-sdk@0.3.300
# or
yarn add @anthropic-ai/claude-agent-sdk@0.3.300
# or
pnpm add @anthropic-ai/claude-agent-sdk@0.3.300
# or
bun add @anthropic-ai/claude-agent-sdk@0.3.300