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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.224

The per-session subagent spawn limit is gone

You'll notice
Useful4 Signal3
Subagents Notable

You can spawn as many subagents as you want in one session; the per-session cap is gone.

What

There is no longer any cap on how many subagents one session can spawn. The limit, its error message and the counter that tracked spawns have all been removed. Subagents launched from a forked skill still stop at the nesting depth limit and still refuse to start a duplicate of one that is already running.

Details
  • CLAUDE_CODE_MAX_SUBAGENTS_PER_SESSION still appears in a list of recognised environment variable names, but nothing in the build reads or enforces it.
Evidence

forked_skill_depth_cap

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v2.1.224 →