cargo-doc-query

name	cargo-doc-query
description	Tool for querying 3rd-party library Rust documentation using cargo-doc-query
license	MIT
compatibility	opencode

Cargo Doc Query Skill

Tool for querying 3rd-party library Rust documentation using cargo-doc-query.

Usage

This skill allows the agent to query Rust crate documentation to understand APIs, types, and modules during development.

cargo-doc-query <command> [args]

Commands

Query

Query methods, traits, or modules for a type:

cargo-doc-query query <path> [--crate-name <name>] [--minimal] [--tokens <n>]

Examples:

• cargo-doc-query query anyhow::Error
• cargo-doc-query query anyhow --crate-name anyhow
• cargo-doc-query query std::vec::Vec --minimal

Expand

Expand a type or module recursively to see its hierarchy:

cargo-doc-query expand <path> --depth <n> [--minimal] [--tokens <n>]

Examples:

• cargo-doc-query expand anyhow::Error --depth 1
• cargo-doc-query expand anyhow --depth 2 --crate-name anyhow

Build

Build the documentation index (run first):

cargo-doc-query build

Flags

• --crate-name <name>: Limit to specific crate
• --minimal: Output minimal representation (signatures only)
• --tokens <n>: Limit output to approximately n tokens
• --depth <n>: Maximum recursion depth for expand

When to Use

Use this skill when:

• Understanding external crate APIs
• Exploring type hierarchies
• Preparing context for LLM prompts about Rust code
• Checking method signatures and trait implementations
• Exploring module structures

Workflow

1. First time: Run cargo-doc-query build to generate the index
2. Query types: Use query for specific types or modules
3. Explore hierarchies: Use expand for recursive exploration
4. Use filters: Add --minimal or --tokens to control output size

Output Format

All commands output JSON for easy parsing. Use jq for filtering:

cargo-doc-query query anyhow::Error | jq '.matches[0].content'

Common Patterns

Get all methods of a type:

cargo-doc-query query <Type> | jq '.matches[].content.methods'

List module contents:

cargo-doc-query query <module_path> --crate-name <crate>

Quick type info (minimal):

cargo-doc-query query <Type> --minimal