Vibe Coding
Pattern: The Prompt Cache Became a Scheduling Problem, Not Just a Pricing Feature
Claude Code's new same-prefix stagger for workflow fan-outs (`CLAUDE_CODE_WORKFLOW_PREFIX_STAGGER_MS`) treats cache warmth as something the orchestrator must sequence for, and Headroom attacks the same bill from the other side by shrinking what enters the window at all. Both reflect a shift: with fan-out orchestration now normal, the dominant cost is no longer model choice but how many agents redundantly pay for identical context. The practical rule emerging is that parallel siblings sharing a preamble should be launched with a deliberate offset, not simultaneously — simultaneity is the anti-pattern.
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