Claude Code re-enabled nested subagents at depth 3 — after disabling nesting entirely three days earlier
Claude Code Changelog·medium signal
v2.1.219 (July 24) set the default nested-subagent spawn depth to 3, up from 1, with `CLAUDE_CODE_MAX_SUBAGENT_SPAWN_DEPTH=1` to turn nesting back off. This reverses v2.1.217 (July 21), which had disabled nested spawning by default after unbounded fan-out problems. If you set that env var as a workaround last week, it is now actively suppressing a capability you probably want back — and the same release added nested-subagent forwarding to `stream-json` under `--forward-subagent-text`, keyed by the spawning Agent's `tool_use` id.