Claude Agent SDK 0.3.311

What's changed

• Added cacheCreationEphemeral5mInputTokens and cacheCreationEphemeral1hInputTokens to ModelUsage, splitting cacheCreationInputTokens by cache lifetime
• Changed background start-up work to wait until the first model request is sent, for about 10 seconds at most, when the first message arrives during start-up
• Changed the minimum supported Node.js version from 18.0.0 to 18.14.0
• Updated to parity with Claude Code v2.1.311

Update

npm install @anthropic-ai/claude-agent-sdk@0.3.311
# or
yarn add @anthropic-ai/claude-agent-sdk@0.3.311
# or
pnpm add @anthropic-ai/claude-agent-sdk@0.3.311
# or
bun add @anthropic-ai/claude-agent-sdk@0.3.311