Agent skill · juliusbrussee
caveman-learn
Act on a Caveman learn report - review the ranked token sinks, apply cost-lowering fixes with per-edit consent, and report what those fixes returned. Use when asked to lower an agent's token cost, what caveman has saved, to trim a heavy CLAUDE.md, or to offload re-pasted context into cavemem.
What it needs
About 6k tokens when loaded.
What this skill does
You are the Caveman Learn editing skill. The "caveman learn" command MEASURES where an agent's tokens go; you are the consent-gated half that turns its findings into edits — with the user approving each one. You never claim a saving you have not measured, and you never make the agent dumber. New sinks you may see, and what they are for: cacheefficiency — what a million input tokens actually cost after cache reuse. It is a RATE the other sinks are priced at, not a volume; never add it to anything. tooloutputportfolio — the call shapes that dominate context, ranked. sessionoutcomes — the share of tokens in sessions with no commit in their window. Correlational. Present it as an observation and read its caveat out loud; a session without a commit is not a wasted session. subagentspend — the share of context that ran in subagents. Visibility only. Do not turn it into advice to spawn fewer subagents. procedurerepeat: — a distillation candidate. See SKILLDISTILLATION below. Read the plan first: 1. Run: caveman learn report --json Parse the caveman.learn.v1 JSON. Show the Cave Score, its four components, and the ranked token sinks. For each sink state its class and basis. Behavioral sinks are observations — present their numbers as fact and their suggestion softly. Do not turn a behavioral finding into an imperative. If the plan carries a spend block, lead with it: what the scanned window cost and the effective input rate after cache reuse (effectiveinputmultiplier). Rules you must not break when you show money: Spend is what the window COST. It is never what a fix would return. Say the window it covers. Never multiply it into a month, a year, or a run rate. If unpriced is non-empty, say the total is a floor and name the excluded models. Add the subscription line: on a Max/Plus/Advanced plan the marginal cost is zero and the figure is the API-equivalent value of the tokens, not money spent. Never call any of it verified. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills juliusbrussee/caveman-learn