Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add hyperb1iss/moonrepo-skill --skill protogit clone --depth 1 https://github.com/hyperb1iss/moonrepo-skillWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/hyperb1iss/moonrepo-skill/proto)<a href="https://agentmods.dev/skills/hyperb1iss/moonrepo-skill/proto"><img src="https://agentmods.dev/badge/skills/hyperb1iss/moonrepo-skill/proto.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00073 | $0.02146 |
| Opus 5 | $0.00036 | $0.01073 |
| Sonnet 5 | $0.00015 | $0.00429 |
| Haiku 4.5 | $0.00007 | $0.00215 |
Grade A, and why
proto scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
bash <(curl -fsSL https://moonrepo.dev/install/proto.sh) How it starts
The opening of the file, as written. The whole thing — 350 lines — stays where its author put it; the contents beside it link to each section on GitHub.
proto - Pluggable Multi-Language Version Manager
proto is a next-generation version manager for multiple programming languages. It provides a unified interface for managing Node.js, npm, pnpm, yarn, Bun, Deno, Rust, Go, Python, and 800+ tools via plugins.
When to Use proto
- Managing language/tool versions across projects
- Pinning versions in
.prototoolsfor team consistency - Installing and running tools without global pollution
- Replacing nvm, pyenv, rustup, gvm with a single tool
Installation
# Linux, macOS, WSL
bash <(curl -fsSL https://moonrepo.dev/install/proto.sh)
# Specific version, non-interactive
bash <(curl -fsSL https://moonrepo.dev/install/proto.sh) 1.2.3 --yes
Shell Setup
# Add to shell profile
eval "$(proto activate bash)" # Bash
eval "$(proto activate zsh)" # Zsh
Quick Reference
Core Commands
proto install <tool> # Install tool
proto install node 20.10.0 # Install specific version
proto install node --build # Build from source (v0.45+)
proto run <tool> # Run with detected version
proto exec node pnpm -- cmd # Bootstrap multi-tool env (v0.53+)
proto pin <tool> <version> # Pin version locally
proto pin <tool> --global # Pin globally
proto versions <tool> # List available versions
proto outdated # Check for updates
proto clean # Remove unused tools
proto upgrade # Upgrade proto itself
proto diagnose # Identify installation issues
proto debug config # List all .prototools files
proto debug env # Show environment info
Configuration: .prototools
# .prototools
node = "20.10.0"
npm = "10.2.0"
pnpm = "8.12.0"
yarn = "4.0.0"
bun = "1.0.0"
deno = "1.40.0"
rust = "1.75.0"
go = "1.21.0"
python = "3.12.0"
[plugins]
my-tool = "https://example.com/plugin.wasm"
[settings]
auto-install = true
auto-clean = true
detect-strategy = "prefer-prototools"
[env]
NODE_ENV = "development"
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 7d ago First seen · 350 lines · 73 tokens per session scan A d156a9eaebed
proto is a skill published in the GitHub repository hyperb1iss/moonrepo-skill (5 stars, last pushed 7mo ago), licensed Apache-2.0. It adds 73 tokens to every session and 2,146 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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