v2.1.128

Source: Anthropic Claude Code Date: 2026-05-04 URL: https://github.com/anthropics/claude-code/releases/tag/v2.1.128

Summary

Claude Code v2.1.128 ships MCP quality-of-life improvements (tool count display, zero-tool server warnings, tool re-announcement summaries), plugin zip archive support, a crash fix for large stdin input over 10 MB, and branch creation corrected to use local HEAD rather than origin/<default-branch>. The release also collapses duplicate Opus 4.7 entries in the model picker and adds workspace as a reserved MCP server name.

Implications

• The MCP reliability fixes (zero-tool flagging, re-announcement summarization) reflect growing real-world adoption pressure: teams are running enough MCP servers that noise and silent failures are becoming operational problems.
• Plugin zip archive support lowers the distribution friction for custom tooling — relevant for teams shipping internal Claude Code extensions without a public registry.
• The EnterWorktree branch-creation fix (local HEAD vs. remote default) closes a subtle but consequential bug for teams using worktrees in non-standard branching workflows.
• Crash fix for >10 MB stdin input signals that Claude Code is being used in pipelines that pipe large artifacts directly — a usage pattern the tooling needs to harden for as agentic workflows mature.