Claude Code v2.1.323 Adds Experimental Code Mode: Parallel Tool Calls via JavaScript
zyyyyl9144 · reddit · 2026-11-14
Claude Code v2.1.323 ships an experimental Code Mode. Previously each turn made one tool call, read the result, then decided the next step; now Claude writes a chunk of JavaScript that runs several tool calls in a single pass, in parallel, returning only the needed output to context.
Key points:
- Anthropic's own docs note every turn resends the whole conversation — larger context means more tokens burned
- Fewer round trips and resends mean the same 5-hour limit now gets far more done — effectively a limit raise in everything but name
- Caveat: off by default and works only in interactive terminal sessions
Enable with one line: CLAUDECODEEXPERIMENTALCODEMODE=1 claude. Docs: code.claude.com/docs/en/code-mode
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