---
name: opensrc
description: Fetch dependency source code to give AI agents deeper implementation context. Use when the agent needs to understand how a library works internally, read…
---

# opensrc

Fetch dependency source code to give AI agents deeper implementation context. Use when the agent needs to understand how a library works internally, read…

# opensrcby vercel
Fetch dependency source code to give AI agents deeper implementation context. Use when the agent needs to understand how a library works internally, read…

`npx skills add https://github.com/vercel-labs/opensrc --skill opensrc`Download ZIPGitHub

## Source Code Fetching with opensrc

Fetches dependency source code so agents can read implementations, not just types. Clones repositories at the correct version tag and caches them globally at `~/.opensrc/`.

## Core Pattern

```
`rg "parse" $(opensrc path zod)
cat $(opensrc path zod)/src/types.ts
find $(opensrc path zod) -name "*.test.ts"
`
```

`opensrc path <pkg>` prints the absolute path to cached source. If not cached, it fetches automatically. Progress goes to stderr, path to stdout, so `$(opensrc path ...)` works in subshells.

## Fetching Source Code

```
`opensrc path zod
opensrc path pypi:requests
opensrc path crates:serde
opensrc path facebook/react

# Multiple packages at once
opensrc path zod react next
opensrc path pypi:requests pypi:flask
opensrc path crates:serde crates:tokio

# Specific versions
opensrc path [email&#160;protected]
opensrc path pypi:[email&#160;protected]
opensrc path owner/[email&#160;protected]
opensrc path owner/repo#main
`
```

### Version Resolution

For npm packages, opensrc auto-detects the installed version from lockfiles (`package-lock.json`, `pnpm-lock.yaml`, `yarn.lock`). Use `--cwd` to resolve from a different project:

```
`opensrc path zod --cwd /path/to/project
`
```

For PyPI and crates.io, explicit versions or latest are used. For repos, use `@ref` or `#ref` to pin a branch, tag, or commit.

## Managing the Cache

Source is cached globally at `~/.opensrc/` (override with `OPENSRC_HOME`).

```
`opensrc list # show all cached sources
opensrc list --json # JSON output

opensrc remove zod # remove a package
opensrc remove facebook/react # remove a repo

opensrc clean # remove everything
opensrc clean --npm # only npm packages
opensrc clean --pypi # only PyPI packages
opensrc clean --crates # only crates.io packages
opensrc clean --packages # all packages, keep repos
opensrc clean --repos # all repos, keep packages
`
```

## When to Fetch Source

Fetch source when you need to:

* Understand internal behavior that types don't reveal

* Debug unexpected library behavior

* Learn patterns from well-known implementations

* Verify how a function handles edge cases

Don't fetch source for simple API usage questions that docs or types can answer.

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**Source**: https://github.com/vercel-labs/opensrc/tree/HEAD/skills/opensrc
**Author**: vercel
**Discovered via**: mcpservers.org