Opensrc

What it does

When your agent uses it

• Needing to understand how a library works internally
• Debug dependency issues
• Explore package implementations

Example prompts

• “/opensrc”

Requirements

• Node.js

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

1. 1Version Detection - For npm, auto-detects installed version from node_modules, package-lock.json, pnpm-lock.yaml, or yarn.lock
2. 2Repository Resolution - Resolves package to its git repo via registry API, clones at matching tag
3. 3Monorepo Support - Handles packages in monorepos via repository.directory field
4. 4Shallow Clone - Uses --depth 1 for efficient cloning, removes .git after clone
5. 5Tag Fallback - Tries v{version}, {version}, then default branch if tag not found

What it can do on your machine

Read from SKILL.md and the folder at commit 8bb56d1. 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

  Shell commands in SKILL.md call:

  • npx
  • npm

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Hosts in commands or code, which the agent is likely to contact:

  • github.com

  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

Opensrc loads about 910 tokens when it runs, and up to ~4k if it reads all its reference files. Until then it costs about 71 tokens; SKILL.md has 223 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~71

When it runs · the whole SKILL.md, loaded when a task matches

~910

With references · SKILL.md plus every file in references/, read only if the agent opens them

~4k

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

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 deadlock-mod-manager/deadlock-mod-manager at commit 8bb56d1, republished under its GPL-3.0 licence (© deadlock-mod-manager). 223 words, ~910 tokens.

name

opensrc

description

Fetch source code for npm, PyPI, or crates.io packages and GitHub/GitLab repos to provide AI agents with implementation context beyond types and docs. Use when needing to understand how a library works internally, debug dependency issues, or explore package implementations.

# Install globally or use npx
npm install -g opensrc

# Fetch npm package (auto-detects installed version from lockfile)
npx opensrc zod

# Fetch from other registries
npx opensrc pypi:requests       # Python/PyPI
npx opensrc crates:serde        # Rust/crates.io

# Fetch GitHub repo directly
npx opensrc vercel/ai           # owner/repo shorthand
npx opensrc github:owner/repo   # explicit prefix
npx opensrc https://github.com/colinhacks/zod  # full URL

# Fetch specific version/ref
npx opensrc zod@3.22.0
npx opensrc owner/repo@v1.0.0

opensrc/
├── settings.json           # User preferences
├── sources.json            # Index of fetched packages/repos
└── repos/
    └── github.com/
        └── owner/
            └── repo/       # Cloned source code

# Agent needs to understand zod's implementation
npx opensrc zod
# → Detects version from lockfile
# → Finds repo URL from npm registry
# → Clones at matching git tag
# → Source available at opensrc/repos/github.com/colinhacks/zod/

# Re-run same command to update to currently installed version
npx opensrc zod
# → Checks if version changed
# → Re-clones if needed

# Fetch multiple at once
npx opensrc react react-dom next
npx opensrc zod pypi:pydantic vercel/ai

© deadlock-mod-manager, GPL-3.0. 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 3 other files (references) in .agents/skills/opensrc of deadlock-mod-manager/deadlock-mod-manager.

• SKILL.md
• references/architecture.md
• references/cli-usage.md
• references/registry-support.md

Open the folder on GitHubat commit 8bb56d1