Claude Code Changelogs Recent Archive Source-level · unofficial Updates
← All changelogs v2.1.37
Claude Code · Source-level changelog

Version 2.1.37

This is a maintenance release with internal performance optimizations for Fast mode. There are no user-facing feature changes.

Package @anthropic-ai/claude-code Diff v2.1.36 → v2.1.37
2
Features & Changes
0
Bug Fixes
0
In Development
0
Env Vars / Flags

Changes

2 items

Fast Mode Status Caching #

The fast mode status check now caches results for 30 seconds to reduce redundant API calls. When you rapidly toggle fast mode or navigate between sessions, the CLI will reuse recent status checks rather than querying the server each time.

Evidence

Prefetch debouncing with 30-second interval (search for "Skipping penguin mode prefetch, fetched recently")

Fast Mode Command Responsiveness #

The /fast command now includes a 300ms timeout for the status prefetch, ensuring the command remains responsive even when the API is slow.

Evidence

Timeout with telemetry tracking (search for "tengu_fast_mode_prefetch_timeout")