Add sub-agent nesting for Claude Agent SDK wrapper #1352
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Keep sub-agent span references in subAgentSpans map after PostToolUse ends them, so createLLMSpan can still resolve the correct parent when flushing the sub-agent's message batch. Add real SDK integration test that verifies sub-agent LLM and tool spans are nested correctly. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
clutchski
changed the title
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Track ended sub-agent spans in a Set so the finally block skips already-closed spans. Remove lenient guard on tool span assertion so the test fails if the sub-agent doesn't use the calculator. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
cpinn
approved these changes
Feb 10, 2026
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Summary
parent_tool_use_idfrom SDK messages to detect sub-agent boundariesparent_tool_use_id)createLLMSpancould lose parent reference afterPostToolUsehook firedTest plan
npx vitest run --config src/wrappers/claude-agent-sdk/vitest.config.js)pnpm build)🤖 Generated with Claude Code