Vibe Coding
Claude Code Now Staggers Same-Prefix Workflow Agents So Siblings Read the Cached Prompt Prefix Instead of Re-Paying It
Version 2.1.229 changed workflow fan-outs to stagger the launch of sibling agents that share a prompt prefix, so agents after the first hit the warm prompt cache rather than each writing their own copy of the same prefix. The behavior is controlled by `CLAUDE_CODE_WORKFLOW_PREFIX_STAGGER_MS`, and setting it to `0` disables the stagger. This is a real cost lever for anyone fanning out 10+ identical-preamble subagents — previously every parallel sibling paid full cache-write pricing on the shared prefix.
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