Forked subagents see different stand-in results for each sibling tool call
When a subagent is forked from a message with several tool calls, each call now gets stand-in result text that depends on which call and which tool it is
Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
SubagentsArea: what it touches
Internal ChangesKind: in v2.1.307,
Internal ChangesSection of the release
What
A subagent is a helper Claude starts to work on part of a task. A forked subagent starts with a copy of the conversation so far. When the message it is forked from contains several tool calls (requests by Claude to run a tool), Claude Code fills in a stand-in result for each one. That stand-in text now depends on which call is the one doing the forking and which tool each call uses. Before, every call got the same stand-in text.
Why
It can change what a forked subagent is told about the other tool calls in the message it started from.
