What
- The
thinking_displayparameter of theset_max_thinking_tokenstool now accepts a new mode, in addition tosummarizedandomitted, that shows one short title per stretch of thinking instead of a full prose summary. This mode only works for Claude Code sessions that Anthropic itself hosts; on any other client, the request still succeeds but silently falls back toomittedonce the API rejects the value. - A tightened validation schema now requires
max_thinking_tokensto be an integer ornull, andthinking_displayto be one of a fixed set of values ornull, with a matching error message when the input doesn't fit.
Why
The new display mode gives a more scannable view of Claude's thinking on supported sessions, while the stricter validation makes sure invalid values for these settings produce a clear error instead of being silently accepted.
Names in the bundleset_max_thinking_tokenshighlights
The entry above is what we published on the day. These lines were added later, as Anthropic's own pages caught up, and they sit beside the original rather than replacing it.
Confirmed since
Anthropic's documentation has since written up highlights, on Manage multiple agents with agent view.
| v2.1.225 | `claude agents` in a directory you haven't trusted shows the same [workspace trust dialog](/docs/en/permissions#project-allow-rules-and-workspace-trust) that `claude` shows on startup, before agent view opens. Accepting saves …agent-view see the edit
One source agreesOne thing we can check says the same as this entry.
Anthropic's documentation agrees
Anthropic's documentation has since written up highlights, on Manage multiple agents with agent view.