Install the "caveman" agent skill from https://github.com/hmislk/hmis/tree/development/.claude/skills/caveman into .claude/skills/caveman/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caveman", then confirm the skill loads.
Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
skills CLI
$ npx skills add hmislk/hmis --skill caveman -a codex
Project install goes to .agents/skills/; add -g for ~/.codex/skills/.
Install the "caveman" agent skill from https://github.com/hmislk/hmis/tree/development/.claude/skills/caveman into .agents/skills/caveman/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caveman", then confirm the skill loads.
Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
skills CLI
$ npx skills add hmislk/hmis --skill caveman -a cursor
Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.
Install the "caveman" agent skill from https://github.com/hmislk/hmis/tree/development/.claude/skills/caveman into .cursor/skills/caveman/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caveman", then confirm the skill loads.
Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
skills CLI
$ npx skills add hmislk/hmis --skill caveman -a gemini-cli
Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.
Install the "caveman" agent skill from https://github.com/hmislk/hmis/tree/development/.claude/skills/caveman into .gemini/skills/caveman/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caveman", then confirm the skill loads.
Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
GitHub CLI
$ gh skill install hmislk/hmis caveman
Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
skills CLI
$ npx skills add hmislk/hmis --skill caveman -a github-copilot
Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.
Install the "caveman" agent skill from https://github.com/hmislk/hmis/tree/development/.claude/skills/caveman into .github/skills/caveman/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caveman", then confirm the skill loads.
GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
skills CLI
$ npx skills add hmislk/hmis --skill caveman -a opencode
OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
Install the "caveman" agent skill from https://github.com/hmislk/hmis/tree/development/.claude/skills/caveman into .opencode/skills/caveman/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caveman", then confirm the skill loads.
OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
Skill name
caveman
GitHub stars
236
Used in
21 other repos
Token cost
~946 tokens
SKILL.md length
406 words
Files
1
Skills in repo
33
Repo updated
First seen
Licence
GPL-3.0
At a glance
Ultra-compressed communication mode. An agent skill from hmislk/hmis.
User says caveman mode
SKILL.md covers Persistence, Rules, Intensity and Auto-Clarity, plus 1 more section
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Talk like caveman
What it does
Caveman is an agent skill from hmislk/hmis. Ultra-compressed communication mode. Cuts token usage ~75% by speaking like caveman while keeping full technical accuracy. Supports intensity levels: lite, full (default), ultra, wenyan-lite, wenyan-full, wenyan-ultra. Use when user says "caveman mode", "talk like caveman", "use caveman", "less tokens", "be brief", or invokes /caveman. Also auto-triggers when token efficiency is requested.
Its SKILL.md is about 950 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: This is an Open Source Java EE based Hospital Information Management System. The licence is GPL-3.0.
When your agent uses it
User says caveman mode
Talk like caveman
Invokes /caveman
Token efficiency is requested
Example prompts
“caveman mode”
“talk like caveman”
“use caveman”
“/caveman”
What it can do on your machine
Read from SKILL.md and the folder at commit d5d2020. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Caveman loads about 946 tokens when it runs. Until then it costs about 100 tokens; SKILL.md has 406 words of instructions outside code blocks.
Always· name and description, kept in context so the agent knows when to use it
~100
When it runs· the whole SKILL.md, loaded when a task matches
~946
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
Download SKILL.mdSave it as .claude/skills/caveman/SKILL.md (or your agent's skills folder).
name
caveman
description
Ultra-compressed communication mode. Cuts token usage ~75% by speaking like caveman while keeping full technical accuracy. Supports intensity levels: lite, full (default), ultra, wenyan-lite, wenyan-full, wenyan-ultra. Use when user says "caveman mode", "talk like caveman", "use caveman", "less tokens", "be brief", or invokes /caveman. Also auto-triggers when token efficiency is requested.
Respond terse like smart caveman. All technical substance stay. Only fluff die.
Persistence
ACTIVE EVERY RESPONSE. No revert after many turns. No filler drift. Still active if unsure. Off only: "stop caveman" / "normal mode".
Default: full. Switch: /caveman lite|full|ultra.
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"). Technical terms 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:"
Intensity
Level
What change
lite
No filler/hedging. Keep articles + full sentences. Professional but tight
full
Drop articles, fragments OK, short synonyms. Classic caveman
ultra
Abbreviate prose words (DB/auth/config/req/res/fn/impl), strip conjunctions, arrows for causality (X → Y), one word when one word enough. Code symbols, function names, API names, error strings: never abbreviate
wenyan-lite
Semi-classical. Drop filler/hedging but keep grammar structure, classical register
wenyan-full
Maximum classical terseness. Fully 文言文. 80-90% character reduction. Classical sentence patterns, verbs precede objects, subjects often omitted, classical particles (之/乃/為/其)
wenyan-ultra
Extreme abbreviation while keeping classical Chinese feel. Maximum compression, ultra terse
Example — "Why React component re-render?"
lite: "Your component re-renders because you create a new object reference each render. Wrap it in useMemo."
full: "New object ref each render. Inline object prop = new ref = re-render. Wrap in useMemo."
ultra: "Inline obj prop → new ref → re-render. useMemo."
wenyan-lite: "組件頻重繪，以每繪新生對象參照故。以 useMemo 包之。"
wenyan-full: "物出新參照，致重繪。useMemo .Wrap之。"
wenyan-ultra: "新參照→重繪。useMemo Wrap。"
Show full SKILL.md (150 more words)Show less
Example — "Explain database connection pooling."
lite: "Connection pooling reuses open connections instead of creating new ones per request. Avoids repeated handshake overhead."
full: "Pool reuse open DB connections. No new connection per request. Skip handshake overhead."
ultra: "Pool = reuse DB conn. Skip handshake → fast under load."
wenyan-full: "池reuse open connection。不每req新開。skip handshake overhead。"
We found 25 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 21 other GitHub owners. This page covers the copy in hmislk/hmis, which our catalogue first saw on October 7, 2026.
Caveman next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
A skill your agent uses when asked to make a demo, training, how-to or tutorial video with sound or voice-over showing an HMIS function or configuration (e.g.
Run a GitHub issue through its full lifecycle end-to-end: investigate, discuss the approach, gather test context (department/data), implement, rebuild + local redeploy, verify with Playwright and…
236 GitHub stars~5k tokensUpdated today
Auto-check passed
Questions about Caveman
What does Caveman do?
Ultra-compressed communication mode. An agent skill from hmislk/hmis. Caveman is an agent skill from hmislk/hmis. Ultra-compressed communication mode.
When should I use Caveman?
Caveman fits situations like: user says caveman mode; talk like caveman; invokes /caveman; token efficiency is requested.
How do I install Caveman in Claude Code?
Run `npx skills add hmislk/hmis --skill caveman -a claude-code`. Or copy the skill folder (.claude/skills/caveman in hmislk/hmis) into .claude/skills/caveman in your project. Claude Code loads it when a task matches its description.
How do I install Caveman in Codex?
Run `npx skills add hmislk/hmis --skill caveman -a codex`. Or copy the skill folder (.claude/skills/caveman in hmislk/hmis) into .agents/skills/caveman in your project. Codex loads it when a task matches its description.
Can I use Caveman in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add hmislk/hmis --skill caveman -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/caveman, .gemini/skills/caveman, .github/skills/caveman and .opencode/skills/caveman in your project.
What does Caveman need to run?
SKILL.md names no scripts, command-line tools or credentials: Caveman is instructions for the agent only.
Does Caveman access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Caveman safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Caveman use?
Caveman is published under the GPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Caveman use?
About 946 tokens (SKILL.md is roughly 3.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Caveman?
Skills that share tags, products or a category with Caveman: Compression (thedaviddias/Front-End-Checklist, 74k stars), Caveman Mode (JuliusBrussee/caveman, 110k stars), OmniRoute Prompt Compression (diegosouzapw/OmniRoute, 74k stars) and Caveman Compress (vishiri/fantasia-archive, 409 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Caveman?
hmislk (a GitHub organization) maintains it in hmislk/hmis, which has 236 GitHub stars. The repository holds 33 skills in this directory. The repository was last updated on October 8, 2026.
Source: hmislk/hmis on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.
