Caveman MCP — Cas d'usage, Installer & Démo en direct

Pourquoi l'utiliser

Fonctionnalités clés

Three intensity modes: Lite / Full / Ultra (+ Classical Chinese)
~65% average output-token savings (repo benchmarks)
Sub-skills: /caveman-commit, /caveman-review, /caveman-compress
Cross-platform: Claude Code, Cursor, Codex, Gemini, Windsurf, Cline, Copilot
Eval suite in-repo showing accuracy preserved, not just shorter

Démo en direct

Aperçu en pratique

caveman-skill.replay ▶ prêt

0/0

Installer

Choisissez votre client

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "caveman-skill": {
      "command": "claude",
      "args": [
        "plugin",
        "marketplace",
        "add",
        "JuliusBrussee/caveman"
      ],
      "_inferred": false
    }
  }
}

Ouvrez Claude Desktop → Settings → Developer → Edit Config. Redémarrez après avoir enregistré.

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "caveman-skill": {
      "command": "claude",
      "args": [
        "plugin",
        "marketplace",
        "add",
        "JuliusBrussee/caveman"
      ],
      "_inferred": false
    }
  }
}

Cursor utilise le même schéma mcpServers que Claude Desktop. La config projet l'emporte sur la globale.

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "caveman-skill": {
      "command": "claude",
      "args": [
        "plugin",
        "marketplace",
        "add",
        "JuliusBrussee/caveman"
      ],
      "_inferred": false
    }
  }
}

Cliquez sur l'icône MCP Servers dans la barre latérale Cline, puis "Edit Configuration".

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "caveman-skill": {
      "command": "claude",
      "args": [
        "plugin",
        "marketplace",
        "add",
        "JuliusBrussee/caveman"
      ],
      "_inferred": false
    }
  }
}

Même format que Claude Desktop. Redémarrez Windsurf pour appliquer.

~/.continue/config.json

{
  "mcpServers": [
    {
      "name": "caveman-skill",
      "command": "claude",
      "args": [
        "plugin",
        "marketplace",
        "add",
        "JuliusBrussee/caveman"
      ]
    }
  ]
}

Continue utilise un tableau d'objets serveur plutôt qu'une map.

~/.config/zed/settings.json

{
  "context_servers": {
    "caveman-skill": {
      "command": {
        "path": "claude",
        "args": [
          "plugin",
          "marketplace",
          "add",
          "JuliusBrussee/caveman"
        ]
      }
    }
  }
}

Ajoutez dans context_servers. Zed recharge à chaud à la sauvegarde.

claude mcp add caveman-skill -- claude plugin marketplace add JuliusBrussee/caveman

Une seule ligne. Vérifiez avec claude mcp list. Supprimez avec claude mcp remove.

Cas d'usage

Usages concrets : Caveman

Get crisp one-line commit messages for every patch

👤 Anyone tired of 8-paragraph AI-written commits ⏱ ~5 min beginner

Quand l'utiliser : Claude writes a commit message, and it's a novel. You want it to say 'fix: off-by-one in pagination' and stop.

Prérequis

Caveman plugin installed — claude plugin marketplace add JuliusBrussee/caveman && claude plugin install caveman@caveman

Déroulement

Commit with caveman-commit

/caveman-commit — write a commit message for the staged changes.✓ Copié

→ One-line conventional commit; no body unless genuinely needed
Ship a branch of small commits

For the 4 staged files, use /caveman-commit per file — atomic commits, one line each.✓ Copié

→ git log shows 4 short commits

Résultat : Readable git log; bisect-friendly commits.

Pièges

Lost nuance when a message should be longer (e.g. breaking changes) — Override per-commit: 'write the full version, not caveman, this is a breaking change'

Combiner avec : git · github

Review a PR with one-line actionable comments

👤 Reviewers (and reviewees who dislike AI walls of text) ⏱ ~15 min beginner

Quand l'utiliser : You're doing a quick pass and want pointed nits, not lectures.

Déroulement

Run caveman-review

/caveman-review — go through the diff. One line per comment.✓ Copié

→ Inline comments read like 'rename x → userId for consistency with api/users.ts'
Escalate when needed

On the auth file specifically, switch off caveman for a full-length security review.✓ Copié

→ Long-form only where the stakes justify it

Résultat : Faster review cycles; reviewees don't dismiss comments as noise.

Pièges

One-liners miss nuance on architectural changes — Architectural changes aren't Caveman's job — use default mode for those

Combiner avec : github

Shrink CLAUDE.md and memory notes by 40–50% without losing intent

👤 Anyone whose CLAUDE.md grew past 5k tokens ⏱ ~10 min intermediate

Quand l'utiliser : Your project memory is eating context every session and you know it could be tighter.

Déroulement

Compress in place

/caveman-compress CLAUDE.md — keep rules and facts, cut the prose.✓ Copié

→ File shrinks ~46%; no rule deleted
Audit the diff

Show the diff. Any rule that changed meaning?✓ Copié

→ Per-change verdict; rollbacks if intent drifted
Commit

/caveman-commit — single-line commit for the compression✓ Copié

→ 'chore: compress CLAUDE.md (-46%)'

Résultat : Same rules, half the tokens.

Pièges

Compression drops a subtle caveat — Always diff-review after compressing rule files; intent loss is the main risk

Combiner avec : filesystem

Combinaisons

Associez-le à d'autres MCPs pour un effet X10

caveman-skill + git

Terse commit workflow

Stage the change, then /caveman-commit, then git push.✓ Copié

caveman-skill + github

Caveman PR reviews at scale

For the 5 PRs in my review queue, /caveman-review each; post only actionable comments.✓ Copié

caveman-skill + claude-mem-skill

Shrink memory transcripts without losing decisions

/caveman-compress the claude-mem notes for this project; flag anything where meaning shifted.✓ Copié

Outils

Ce que ce MCP expose

Outil	Entrées	Quand appeler	Coût
/caveman	mode: Lite\|Full\|Ultra\|文言文	Toggle mode for the current task	free
/caveman-commit	staged diff (implicit)	At commit time; preserves staging	small model call
/caveman-review	PR diff	Quick review pass	small model call per file
/caveman-compress	file path	Shrink memory / rules files; diff-review before saving	small model call

Coût et limites

Coût d'exécution

Quota d'API: None
Tokens par appel: By design — negative; saves tokens
Monétaire: Free (MIT)
Astuce: Use Ultra only on genuinely mechanical output (commits, tags); leave design discussions in default mode

Sécurité

Permissions, secrets, portée

Stockage des identifiants : None

Sortie de données : None — pure prompt shaping; no telemetry

Ultra mode can drop disclaimers and safety caveats. Don't use Ultra for legal, medical, or security advice output.

Dépannage

Erreurs courantes et correctifs

Output still verbose after enabling Caveman

Most clients run Caveman per-turn; put /caveman Full at the top of each session or add it to CLAUDE.md

Vérifier : First reply should feel distinctly terse

Caveman-commit returns multi-paragraph body

Usually triggers when the diff is genuinely large or breaks API. For true one-liner, add '—force-oneline'.

Vérifier : Re-run with --force-oneline

Classical Chinese mode outputs garbled

Rare; usually a font / terminal issue, not the skill. Pipe to a file and open in an editor that supports CJK.

Alternatives

Caveman vs autres

Alternative	Quand l'utiliser	Compromis
System prompt with 'be terse'	You want it without a plugin	Inconsistent; Caveman's intensity levels + benchmarks give measurable results
Custom slash commands	You only need one of the sub-behaviors (e.g. terse commits)	Reinventing the wheel

Plus

Ressources

📖 Lire le README officiel sur GitHub

🐙 Voir les issues ouvertes

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