{"version":"2.1.296","anchor":"agent-telemetry-properties","canonical_anchor":"agent-telemetry-properties","heading":"Details recorded when an agent starts are now built in one place","tier":"internal","area":"Telemetry","scope":"individual","heads_up":false,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.296\/e\/agent-telemetry-properties","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.296","markdown":"### Details recorded when an agent starts are now built in one place\n\nThe usage details Claude Code records when an agent starts are now built in one place: type, built-in, skill fork and how it was launched\n\n**What**\n\nA subagent is a helper agent Claude starts to work on part of a task. Claude Code records usage details each time one starts, and these are now built in one place:\n\n- `agent_type`, the kind of agent\n\n- `is_built_in`, whether it ships with Claude Code\n\n- `forked_skill`, whether it came from a forked skill\n\n- `main_thread_spawned`, whether the main conversation started it\n\n- `default_launch`, whether it was a default launch\n\n**Why**\n\nThe list shows what Claude Code measures about how agents are used.\n\n- Area: Telemetry\n- Tier: Under the hood\n- Useful: 1\/5\n- Signal: 0\/5\n- Scope: individual\n- Heads-up: no"}