Does Claude Code warm up or fade?
Splits each session into early, mid, and late thirds — then measures tool execution rate in each phase. Shows whether Claude accelerates, plateaus, or decelerates within a session.
npx cc-warmup
npx cc-warmup --jsonOr open index.html in a browser and drag in .jsonl files.
- Phase rates — tools/hr in early / mid / late thirds
- Pattern — warmup (accelerating) / flat / fade (decelerating)
- Median ratio — late phase rate ÷ early phase rate
- Top sessions — biggest warmup and fadeout examples
cc-warmup — Does Claude Code warm up or fade?
Sessions analyzed: 330
Average pace by session phase (tools/hr)
early ████████████████████ 195 (first third)
mid ███████████░░░░░░░░░ 107 (middle third)
late ████████████░░░░░░░░ 121 (final third)
Session patterns
warmup ██████░░░░░░░░░░░░░░░░ 26% (86) rate increases as session progresses
flat ███░░░░░░░░░░░░░░░░░░░ 14% (47) rate stays roughly constant
fade █████████████░░░░░░░░░ 60% (197) rate decreases as session progresses
Median late/early ratio: 0.64×
Sessions tend to decelerate — context fills, pace drops.
MIT
Claude Code Ops Kit ($19) — 16 production hooks + 5 templates + 3 tools. Built from 160+ hours of autonomous operation.