@anthropic-ai/claude-agent-sdk 0.3.257

v0.3.257

on Node.js NPM

What's changed

• Added thinkingTokens to ModelUsage (a subset of outputTokens), and fixed result-message usage.output_tokens_details.thinking_tokens reporting 0 instead of the session's real count
• Added tool_use_result.resourceLinks on user messages carrying MCP tool results: the resource_link blocks the tool returned, so hosts can render returned files without parsing the result text
• Added optional resource_links to task_notification for an auto-backgrounded MCP tool call that completed, listing the files it returned by reference; join to the call via tool_use_id
• Fixed mcp_reconnect and mcp_toggle acting on a same-named .mcp.json / ~/.claude.json server instead of the --mcp-config or mcp_set_servers one
• Fixed mcp_toggle disable also removing the tools of a sibling MCP server whose name extends the disabled one's (disabling foo dropped foo__bar's tools)
• Changed mcp_set_servers to also list a server whose connection attempt throws under added (with a failed row in mcp_status), not only under errors
• Changed Agent tool calls to emit the periodic tool_progress heartbeat (heartbeat: true) like other long tools; heartbeat frames never clear a subagent_retry indicator
• Fixed the browser SDK bundle (@anthropic-ai/claude-agent-sdk/browser) never streaming any messages on engines without native Symbol.dispose (Safari/iOS, Firefox ESR, older Chromium)
• Fixed a background Bash task that is still running when a stream-json session ends right after an interrupt (stdin closed) never receiving its final task_notification
• Fixed -p giving up on a long-running background subagent without actually stopping it, so background_tasks_changed kept listing it and events for it arrived after its stopped notification
• Added detail option to Query.getContextUsage(): 'summary' answers from the last response's usage and local estimates without per-category token-count API calls (default 'full')
• Updated to parity with Claude Code v2.1.257

Update

npm install @anthropic-ai/claude-agent-sdk@0.3.257
# or
yarn add @anthropic-ai/claude-agent-sdk@0.3.257
# or
pnpm add @anthropic-ai/claude-agent-sdk@0.3.257
# or
bun add @anthropic-ai/claude-agent-sdk@0.3.257