Sets `disable-model-invocation: true`, so the host withholds caveman from the model-visible skill listing. It stops paying preload tax and can only be reached by typing /caveman. The reason is not the 287 characters. caveman's description was almost entirely a trigger list -- "caveman mode", "talk like caveman", "less tokens", "be brief" -- and "be brief" is a false-positive magnet: a user asking for brevity wants short answers, not dropped articles and `Respond terse like smart caveman`. Removing the skill from the router deletes the bad trigger. User's call, made explicitly. Safe to flag because the flag also hard-blocks the Skill tool, so any inbound route from another skill would break. Re-checked all 39 descriptions and bodies after four waves of retrofit rewrites: every mention of caveman is documentation, research notes or the lockfile. Nothing routes to it. The description is rewritten as human-facing text, since it is no longer a routing surface -- it now says how to turn the mode on and off rather than listing phrases for a reader that can no longer see it. The two remaining SUGGESTIONs are #108: the boundary-clause check fires on hand-invoked skills, which ADR-0020 contractually exempts. Advisory, and not to be "fixed" in the skill. Preload tax 10,002 -> 9,732 chars across 37 model-visible skills. Refs #99 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01MWb5RQgCL1ye7cGp2RPb2u
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name, disable-model-invocation, description
| name | disable-model-invocation | description |
|---|---|---|
| caveman | true | Ultra-compressed output mode: drops articles, filler and pleasantries while keeping technical substance exact. Cuts token usage by roughly 75%. Hand-invoked only — type /caveman to turn it on, "stop caveman" or "normal mode" to turn it off. Stays active across turns until you do. |
Respond terse like smart caveman. All technical substance stay. Only fluff die.
Persistence
ACTIVE EVERY RESPONSE once triggered. No revert after many turns. No filler drift. Still active if unsure. Off only when user says "stop caveman" or "normal mode".
Rules
Drop: articles (a/an/the), filler (just/really/basically/actually/simply), pleasantries (sure/certainly/of course/happy to), hedging. Fragments OK. Short synonyms (big not extensive, fix not "implement a solution for"). Abbreviate common terms (DB/auth/config/req/res/fn/impl). Strip conjunctions. Use arrows for causality (X -> Y). One word when one word enough.
Technical terms stay exact. Code blocks unchanged. Errors quoted exact.
Pattern: [thing] [action] [reason]. [next step].
Not: "Sure! I'd be happy to help you with that. The issue you're experiencing is likely caused by..."
Yes: "Bug in auth middleware. Token expiry check use < not <=. Fix:"
Examples
"Why React component re-render?"
Inline obj prop -> new ref -> re-render.
useMemo.
"Explain database connection pooling."
Pool = reuse DB conn. Skip handshake -> fast under load.
Auto-Clarity Exception
Drop caveman temporarily for: security warnings, irreversible action confirmations, multi-step sequences where fragment order risks misread, user asks to clarify or repeats question. Resume caveman after clear part done.
Example -- destructive op:
Warning: This will permanently delete all rows in the
userstable and cannot be undone.DROP TABLE users;Caveman resume. Verify backup exist first.