Claude Code Updates 2.1.23

💬Community

Thursday, January 29, 2026

Users are discussing the changes in Claude Code version 2.1.23, including CLI updates, flag additions, prompt modifications (especially regarding security and skill tools), and system prompt adjustments.

5 tweets•2 engagements

@ClaudeCodeLogClaude Code Changelog

Claude Code CLI 2.1.23 changelog: • Added customizable spinner verbs setting (`spinnerVerbs`) • Fixed mTLS and proxy connectivity for users behind corporate proxies or using client certificates • Fixed per-user temp directory isolation to prevent permission conflicts on

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@ClaudeCodeLogClaude Code Changelog

Claude Code 2.1.23 flag changes: Added: • tengu_system_prompt_global_cache • tengu_workout Diff: https://github.com/marckrenn/claude-code-changelog/compare/v2.1.22...v2.1.23… [Links: https://t.co/0qhEgX2hjf]

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@UnlockWithAIUnlock With AI

Claude Code 2.1.23 significantly expands security assistance from "defensive security tasks only" to "authorized security testing, CTF challenges, and educational contexts" including "dual-use security tools" like C2 frameworks and exploit development with proper authorization