Claude Code 2.1.31 — Release Notes & Changelog

Added session resume hint on exit, showing how to continue your conversation later
Added support for full-width (zenkaku) space input from Japanese IME in checkbox selection

Improved system prompts to more clearly guide the model toward using dedicated tools (Read, Edit, Glob, Grep) instead of bash equivalents (`cat`, `sed`, `grep`, `find`), reducing unnecessary bash command usage
Improved PDF and request size error messages to show actual limits (100 pages, 20MB)

Reduced layout jitter in the terminal when the spinner appears and disappears during streaming

Fixed PDF too large errors permanently locking up sessions, requiring users to start a new conversation
Fixed bash commands incorrectly reporting failure with "Read-only file system" errors when sandbox mode was enabled
Fixed a crash that made sessions unusable after entering plan mode when project config in `~/.claude.json` was missing default fields
Fixed `temperatureOverride` being silently ignored in the streaming API path, causing all streaming requests to use the default temperature (1) regardless of the configured override
Fixed LSP shutdown/exit compatibility with strict language servers that reject null params

Removed misleading Anthropic API pricing from model selector for third-party provider (Bedrock, Vertex, Foundry) users

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