Claude Code 2.1.191 changelog - what changed

[changed] Updated GrepOutput schema to report totalMatches and countIsComplete so callers can distinguish exact counts from truncated lower bounds.
[changed] Extended notebook cell edit payloads with an optional old_source field to support relative diff rendering without re-reading the file.

Models & prompts

Adjusted plan-mode instructions to reinforce that edits, non-readonly tools, and config changes remain disallowed.
Refined focus-mode guidance so the final message is the only visible output when the setting is active.
Updated context-management and memory-handling language to clarify how summaries, ambient context, and stale memories are treated.
Tweaked permission-rejection and interruption messages for consistency when a tool use is denied or a session is paused by the user.
Revised several task-list and coordinator prompts to reduce redundant narration and improve hand-off clarity.

Added /api/claude_code/discovery/team_usage backend route.
Introduced 29 new internal Statsig gates and retired 11 older ones, covering areas such as reactive compaction, long-context surveys, MCP OAuth flows, and team discovery.

No manual steps required.

[changed] Updated GrepOutput schema to report totalMatches and countIsComplete so callers can distinguish exact counts from truncated lower bounds.
[changed] Extended notebook cell edit payloads with an optional old_source field to support relative diff rendering without re-reading the file.

Adjusted plan-mode instructions to reinforce that edits, non-readonly tools, and config changes remain disallowed.
Refined focus-mode guidance so the final message is the only visible output when the setting is active.
Updated context-management and memory-handling language to clarify how summaries, ambient context, and stale memories are treated.
Tweaked permission-rejection and interruption messages for consistency when a tool use is denied or a session is paused by the user.
Revised several task-list and coordinator prompts to reduce redundant narration and improve hand-off clarity.

Added /api/claude_code/discovery/team_usage backend route.
Introduced 29 new internal Statsig gates and retired 11 older ones, covering areas such as reactive compaction, long-context surveys, MCP OAuth flows, and team discovery.

No manual steps required.