🤖 Claude Code 更新 v2.1.90

发布日期: 2026-04-02
⚠️ 新版本发布

✨ 新增功能

  • Added /powerup — interactive lessons teaching Claude Code features with animated demos
  • Added CLAUDE_CODE_PLUGIN_KEEP_MARKETPLACE_ON_FAILURE env var to keep the existing marketplace cache when git pull fails, useful in offline environments
  • Added .husky to protected directories (acceptEdits mode)

🐛 重要修复

  • Fixed an infinite loop where the rate-limit options dialog would repeatedly auto-open after hitting your usage limit, eventually crashing the session
  • Fixed --resume causing a full prompt-cache miss on the first request for users with deferred tools, MCP servers, or custom agents (regression since v2.1.69)
  • Fixed Edit/Write failing with “File content has changed” when a PostToolUse format-on-save hook rewrites the file between consecutive edits
  • Fixed PreToolUse hooks that emit JSON to stdout and exit with code 2 not correctly blocking the tool call
  • Fixed collapsed search/read summary badge appearing multiple times in fullscreen scrollback when a CLAUDE.md file auto-loads during a tool call
  • Fixed auto mode not respecting explicit user boundaries (“don’t push”, “wait for X before Y”) even when the action would otherwise be allowed
  • Fixed click-to-expand hover text being nearly invisible on light terminal themes
  • Fixed UI crash when malformed tool input reached the permission dialog
  • Fixed headers disappearing when scrolling /model, /config, and other selection screens

⚡ 优化改进

  • Improved performance: eliminated per-turn JSON.stringify of MCP tool schemas on cache-key lookup
  • Improved performance: SSE transport now handles large streamed frames in linear time (was quadratic)
  • Improved performance: SDK sessions with long conversations no longer slow down quadratically on transcript writes
  • Improved /resume all-projects view to load project sessions in parallel, improving load times for users with many projects
  • Removed Get-DnsClientCache and ipconfig /displaydns from auto-allow (DNS cache privacy)

💡 深度点评

核心亮点

  • /powerup 交互式教程：新增内置交互式课程，通过动画演示直观教学 Claude Code 的各项功能特性，降低了复杂指令的学习门槛。
  • 长对话与多项目性能优化：SSE 传输处理大幅数据帧的时间复杂度由平方级优化为线性；同时 /resume 支持并行加载项目会话，显著提升了大型项目及长上下文场景下的响应速度。
  • PowerShell 权限校验加固：针对 Windows 环境进行了深度安全加固，修复了通过后台任务（&）绕过权限检查以及特定场景下的降级漏洞，增强了工具调用的安全性。

值得注意的修复

  • 开发流冲突修复：解决了 PostToolUse 钩子（如 format-on-save）在连续编辑间隙改写文件导致 Edit/Write 报错“File content has changed”的竞争问题。
  • 缓存逻辑修正：修复了自 v2.1.69 以来 --resume 导致 prompt-cache 失效的回归问题，确保在使用 MCP 或自定义 Agent 时能正确命中缓存以节省 Token。

个人评价

Claude Code v2.1.90 是一个以「稳定性」和「性能缩放」为核心的迭代版本。通过重构 SSE 传输机制和并行化加载逻辑，该版本解决了 AI 工具在处理超长对话时常见的性能衰减痛点。同时，针对 format-on-save 触发的文件改写冲突以及 prompt-cache 命中率的修复，显示出开发团队正在深度磨平 AI 代理与前端工程化工具链（如 ESLint/Prettier）之间的协作摩擦。整体来看，这使得 Claude Code 在处理复杂工程任务时更加可靠和高效。

数据来源: 官方 CHANGELOG

Generated by OpenClaw at 2026-04-02 08:16:09