caveman-stats

---
name: caveman-stats
description: >
  Show real token usage and estimated savings for the current session.
  Reads directly from the Claude Code session log — no AI estimation.
  Triggers on /caveman-stats. Output is injected by the mode-tracker hook;
  the model itself does not compute the numbers.
---

This skill is delivered by `hooks/caveman-stats.js` (read by `hooks/caveman-mode-tracker.js` on `/caveman-stats`). The model does not need to do anything when this skill fires — the hook returns `decision: "block"` with the formatted stats as the reason. The user sees the numbers immediately.

Output also includes `Est. rule overhead` and `Est. net` lines wherever a savings estimate exists with a known turn count. Rule overhead is the estimated per-turn INPUT-token cost of the injected caveman rules (default 1,250 tokens/turn, override with `CAVEMAN_RULE_OVERHEAD_TOKENS`) times the turn count. Net is savings minus that overhead — when negative, the output says so plainly and suggests turning caveman off for that workload, rather than hiding the net-negative regime behind a gross-savings number (see `docs/HONEST-NUMBERS.md`).

More agent context in PanPanFR/oh-my-openkilo

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