Copilot Session Failure Analysis
dotnet/maui
Mines local Copilot CLI session logs for dotnet/maui to rank costly or failing runs, tag recurring failure modes, propose repo edits and emit guard evals.
“Quick-reference card for the three caveman skills and their commands. Trigger: /caveman-help or "caveman help".”
Install Caveman Help Card
$ npx skills add JuliusBrussee/caveman --skill caveman-help -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install JuliusBrussee/caveman caveman-help --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/JuliusBrussee/caveman.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/caveman-help .claude/skills/caveman-help && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "caveman-help" agent skill from https://github.com/JuliusBrussee/caveman/tree/main/skills/caveman-help into .claude/skills/caveman-help/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caveman-help", 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.
$skill-installer install https://github.com/JuliusBrussee/caveman/tree/main/skills/caveman-helpType 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.
$ npx skills add JuliusBrussee/caveman --skill caveman-help -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install JuliusBrussee/caveman caveman-help --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/JuliusBrussee/caveman.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/caveman-help .agents/skills/caveman-help && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "caveman-help" agent skill from https://github.com/JuliusBrussee/caveman/tree/main/skills/caveman-help into .agents/skills/caveman-help/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caveman-help", 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.
$ npx skills add JuliusBrussee/caveman --skill caveman-help -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install JuliusBrussee/caveman caveman-help --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/JuliusBrussee/caveman.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/caveman-help .cursor/skills/caveman-help && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "caveman-help" agent skill from https://github.com/JuliusBrussee/caveman/tree/main/skills/caveman-help into .cursor/skills/caveman-help/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caveman-help", 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.
$ gemini skills install https://github.com/JuliusBrussee/caveman.git --path skills/caveman-help--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add JuliusBrussee/caveman --skill caveman-help -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install JuliusBrussee/caveman caveman-help --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/JuliusBrussee/caveman.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/caveman-help .gemini/skills/caveman-help && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "caveman-help" agent skill from https://github.com/JuliusBrussee/caveman/tree/main/skills/caveman-help into .gemini/skills/caveman-help/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caveman-help", 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.
$ gh skill install JuliusBrussee/caveman caveman-helpInstalls 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).
$ npx skills add JuliusBrussee/caveman --skill caveman-help -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/JuliusBrussee/caveman.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/caveman-help .github/skills/caveman-help && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "caveman-help" agent skill from https://github.com/JuliusBrussee/caveman/tree/main/skills/caveman-help into .github/skills/caveman-help/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caveman-help", 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.
$ npx skills add JuliusBrussee/caveman --skill caveman-help -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install JuliusBrussee/caveman caveman-help --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/JuliusBrussee/caveman.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/caveman-help .opencode/skills/caveman-help && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "caveman-help" agent skill from https://github.com/JuliusBrussee/caveman/tree/main/skills/caveman-help into .opencode/skills/caveman-help/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "caveman-help", 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-help- GitHub stars
- 111k
- Token cost
- ~690 tokens
- SKILL.md length
- 310 words
- Files
- 2
- Skills in repo
- 18
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
- SKILL.md covers Modes, Skills, Deactivate and Language, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
About this skill
Caveman Help Card is a skill in JuliusBrussee/caveman (111k stars). Its SKILL.md is about 690 tokens, with 1 other file in the folder. Licence: Apache-2.0.
What it can do on your machine
Read from SKILL.md and the folder at commit 2e08b91. 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 (its code samples are bash and json).
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 Help Card loads about 690 tokens when it runs. Until then it costs about 31 tokens; SKILL.md has 310 words of instructions outside code blocks.
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.
SKILL.md
The full file from JuliusBrussee/caveman at commit 2e08b91, republished under its Apache-2.0 licence (© JuliusBrussee). 310 words, ~690 tokens.
Download SKILL.mdSave it as
.claude/skills/caveman-help/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- caveman-help
- description
- Quick-reference card for the three caveman skills and their commands. Trigger: /caveman-help or "caveman help".
Caveman Help
Display this reference card when invoked. One-shot — do NOT change mode, write flag files, or persist anything. Output in caveman style.
Modes
| Mode | Trigger | What change |
|---|---|---|
| caveman | /caveman | The voice. Answer first, no fluff, every fact kept. Default. |
| ultracave | /ultracave (alias /caveman ultra) | Grammar stripped. Fragments, one word when enough, each fact once. |
| megacave | /megacave (alias /caveman wenyan) | Classical Chinese 文言文. Far fewer characters, technical terms verbatim. |
Mode stick until changed or session end.
/caveman status reports current mode without changing it. Claude Code and the standalone OpenCode plugin read stored state; other hosts answer from the conversation and mark it (not tracked by this host).
Skills
| Skill | Trigger | What it do |
|---|---|---|
| caveman-commit | /caveman-commit | Terse commit messages. Conventional Commits. ≤50 char subject. |
| caveman-review | /caveman-review | One-line PR comments: L42: bug: user null. Add guard. |
| caveman-compress | /caveman-compress <file> | Compress .md files to caveman prose. 33.2% fewer tokens on the repo's five test files. |
| caveman-help | /caveman-help | This card. |
Deactivate
Say "stop caveman" or "normal mode". Resume anytime with /caveman.
Language
Keep user's language by default — reply in the language user writes, never switch regardless of example text or multilingual context elsewhere. Compress the style, not the language. Technical terms, code, commands, commit types, and exact error strings stay verbatim unless user ask for translation.
Configure Default Mode
Default mode = caveman. Change it:
Environment variable (highest priority):
export CAVEMAN_DEFAULT_MODE=ultracaveConfig file (~/.config/caveman/config.json):
{ "defaultMode": "ultracave" }For opt-in activation in Claude Code, set defaultMode to manual. Sessions start off; /caveman or talk like caveman activates caveman. off also disables bare-command activation. manual is a startup policy, not a mode. OpenCode still starts in caveman mode because its installer also supplies static activation rules.
Set "off" to suppress automatic and bare-command activation. Use "manual" when bare /caveman should activate.
Resolution: env var > repo config > user config > caveman. Legacy values lite, full, ultra, wenyan* still resolve.
More
Full docs: https://github.com/JuliusBrussee/caveman
© JuliusBrussee, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file in skills/caveman-help of JuliusBrussee/caveman.
- SKILL.md
- README.md
Open the folder on GitHubat commit 2e08b91
Compare with similar skills
Caveman Help Card 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Caveman Help Card this skillJuliusBrussee/caveman | 111k | — | ~690 | Automated safety check: Pass | Apache-2.0 | |
| Copilot Session Failure Analysisdotnet/maui | 23k | — | ~3.4k | Automated safety check: Pass | MIT | |
| Context Mode Output Sandboxmksglu/context-mode | 26k | — | ~4.1k | Automated safety check: Pass | Custom licence | |
| CCS Task Delegationkaitranntt/ccs | 2.9k | — | ~1.8k | Automated safety check: Pass | MIT | |
| Context Mode for Antigravity CLImksglu/context-mode | 26k | — | ~850 | Automated safety check: Pass | Custom licence | |
| Context Fundamentalsguanyang/open-agent-hub | 977 | 2 repos | ~4.2k | Automated safety check: Pass | MIT |
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Categories
Questions about Caveman Help Card
How do I install Caveman Help Card in Claude Code?
Run `npx skills add JuliusBrussee/caveman --skill caveman-help -a claude-code`. Or copy the skill folder (skills/caveman-help in JuliusBrussee/caveman) into .claude/skills/caveman-help in your project. Claude Code loads it when a task matches its description.
How do I install Caveman Help Card in Codex?
Run `npx skills add JuliusBrussee/caveman --skill caveman-help -a codex`. Or copy the skill folder (skills/caveman-help in JuliusBrussee/caveman) into .agents/skills/caveman-help in your project. Codex loads it when a task matches its description.
Can I use Caveman Help Card 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 JuliusBrussee/caveman --skill caveman-help -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-help, .gemini/skills/caveman-help, .github/skills/caveman-help and .opencode/skills/caveman-help in your project.
What does Caveman Help Card need to run?
SKILL.md names no scripts, command-line tools or credentials: Caveman Help Card is instructions for the agent only.
Does Caveman Help Card 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 Help Card 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 Help Card use?
Caveman Help Card is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Caveman Help Card use?
About 690 tokens (SKILL.md is roughly 2.8k 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 Help Card?
Skills that share tags, products or a category with Caveman Help Card: Copilot Session Failure Analysis (dotnet/maui, 23k stars), Context Mode Output Sandbox (mksglu/context-mode, 26k stars), CCS Task Delegation (kaitranntt/ccs, 2.9k stars) and Context Mode for Antigravity CLI (mksglu/context-mode, 26k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Caveman Help Card?
JuliusBrussee (a GitHub user) maintains it in JuliusBrussee/caveman, which has 110,632 GitHub stars. The repository holds 18 skills in this directory. The repository was last updated on October 8, 2026.
Source: JuliusBrussee/caveman on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.