Claude Code forwards Agent-tool subagent records with parent_tool_use_id set; the streaming parser treated them as parent records, so subagent thinking streamed as the assistant's reasoning and subagent tool calls surfaced as unattributed top-level tool events. Gate the thinking/tool dispatchers and assistant-snapshot path on one shared isClaudeSubagentRecord guard.
Also read Claude result errors[] (skipping [ede_diagnostic] telemetry) for every error result instead of reporting only the subtype name.
Fixture: live Claude Code 2.1.234 stream-json capture with a background Explore subagent. Telegram E2E on the claude-cli backend shows the progress draft with only the parent Agent row.
Ayaan Zaidi