/golang-pkg-go-dev

name: golang-pkg-go-dev
description: "Golang package and module lookup via `godig`, a pkg.go.dev API client (CLI + MCP server). Use for any Go/Golang library's documentation, API signatures, symbols, usage examples, which versions exist, licenses, whether a dependency has CVEs, or who imports a package — prefer this over Context7 for any Go package or module. Read-only, no auth. Not for upgrading dependencies (→ See `samber/cc-skills-golang@golang-dependency-management` skill), choosing a library (→ See `samber/cc-skills-golang@golang-popular-libraries` skill), or local symbols and an already-used dependency's resolved source, call sites, and generic instantiations (→ See `samber/cc-skills-golang@golang-gopls` skill)."
user-invocable: true
license: MIT
compatibility: Designed for Claude Code, Codex or similar harness. Requires the godig CLI (go install github.com/samber/godig/cmd/godig@latest) or access to a godig MCP server, and internet access to reach the pkg.go.dev API.
metadata:
  author: samber
  version: "1.4.2"
  openclaw:
    emoji: "🔎"
    homepage: https://github.com/samber/cc-skills-golang
    requires:
      bins:
        - go
        - godig
    install:
      - kind: go
        package: github.com/samber/godig/cmd/godig@latest
        bins: [godig]
    skill-library-version: "0.2.0"
allowed-tools: Read Edit Write Glob Grep Bash(go:*) Bash(golangci-lint:*) Bash(git:*) Bash(godig:*) Agent

golang-pkg-go-dev

**Dependencies:** `godig` — `go install github.com/samber/godig/cmd/godig@latest` (or use a registered godig MCP server / the hosted instance instead).

`godig` queries the [pkg.go.dev](https://pkg.go.dev) API. Use it to answer questions about Go packages and modules: docs, symbols, versions, importers and vulnerabilities. It works as a CLI and as an MCP server, and all operations are **read-only** and need no authentication.

When to use this skill

Trigger on questions like:

• "What versions of github.com/samber/lo are available?"
• "Does golang.org/x/text have known vulnerabilities?"
• "Show me the docs / symbols for package X."
• "Which packages import X?"
• "Search Go packages for Y."

Choosing between `godig`, gopls, Context7, and govulncheck

In short: `godig` answers questions about the **published ecosystem** (works even for packages not yet in your `go.mod`); `gopls` reasons about **your locally resolved build** (`go.sum`, including `replace`d forks); Context7 is a fallback for non-Go or unindexed docs; `govulncheck` is the whole-tree vulnerability audit (→ `samber/cc-skills-golang@golang-security`). See the `samber/cc-skills-golang@golang-gopls` skill for wiring `gopls` (MCP server, native `LSP` tool, and CLI) with Claude Code, and the `samber/cc-skills-golang@golang-how-to` skill's "`godig` vs gopls vs Context7 vs govulncheck" section for the full task-to-tool matrix.

Setup

Install

go install github.com/samber/godig/cmd/godig@latest

Register the MCP server (optional)

`godig mcp` runs over **stdio** by default, or **streamable HTTP** with `--transport http`. The command is harness-agnostic — any MCP-capable host can point at it. Claude Code registers it via its own CLI:

stdio (the client launches godig on demand):

claude mcp add pkg-go-dev -- godig mcp

streamable HTTP (shared server at `/mcp`, default `:8080`):

godig mcp --transport http --addr :8080
claude mcp add --transport http pkg-go-dev http://localhost:8080/mcp

Hosted instance (no install needed) — a public server runs at `https://godig.samber.dev/mcp`:

claude mcp add --transport http pkg-go-dev https://godig.samber.dev/mcp

Other MCP-capable harnesses (Cursor, Windsurf, and others) each have their own MCP server registration — an entry in their respective settings file pointing at the same `godig mcp` command or hosted URL, not a shared config format.

The CLI and the MCP server expose the **same** operations under matching names. Prefer the CLI when `godig` is installed; the hosted instance is a fallback when it is not.

Commands

**Global flags (all commands):** `-o/--output table|json|raw|md` (default `table` — pass `-o md` for chat), `--base-url` (pkg.go.dev API), `--vuln-base-url` (Go vulnerability database, consulted by `vulns` and `overview`), `--timeout`, `--log-level debug|info|warn|error|off`. All are also settable via `GODIG_*` env vars.

| Command | Args | Specific flags | Purpose | | --- | --- | --- | --- | | `overview` | `<path>` | `--version` | Compact summary (metadata, versions, licenses, vulns) — start here | | `search` | `<query>` | `--symbol --limit --filter` | Find packages (optionally exporting a symbol) | | `package info` | `<path>` | `--module --version` | Package metadata | | `package imports` | `<path>` | `--module --version` | Packages this package imports (plain list) | | `package doc` | `<path>` | `--module --version --goos --goarch --format md\|text\|html\|markdown` | Full package doc (LARGE) | | `package examples` | `<path>` | `--module --version --goos --goarch --symbol` | Runnable examples (LARGE; scope with `--symbol`) | | `package licenses` | `<path>` | `--module --version` | License files, full text (LARGE) | | `symbol doc` | `<path> <symbol>` | `--module --version --goos --goarch` | One symbol's signature + doc (token-efficient) | | `symbol examples` | `<path> <symbol>` | `--module --version --goos --goarch` | One symbol's runnable examples | | `symbols` | `<path>` | `--module --version --goos --goarch --limit --filter` | List exported symbols | | `module info` | `<path>` | `--version` | Module metadata | | `module licenses` | `<path>` | `--version` | Module license files (LARGE) | | `module readme` | `<path>` | `--version` | Module README, full Markdown (LARGE) | | `dependencies` | `<path>` | `--version` | go.mod deps: requires / replaces / excludes / go directive | | `packages` | `<path>` | `--version --limit --filter` | Packages contained in a module | | `versions` | `<path