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Use when asking about Rust versions or crate info. Keywords: latest version, what's new, changelog, Rust 1.x, Rust release, stable, nightly, crate info, crates.io, lib.rs, docs.rs, API documentation, crate features, dependencies, which crate, what version, Rust edition, edition 2021, edition 2024, cargo add, cargo update, 最新版本, 版本号, 稳定版, 最新, 哪个版本, crate 信息, 文档, 依赖, Rust 版本, 新特性, 有什么特性
npx skill4agent add actionbook/rust-skills rust-learnerVersion: 2.1.0 | Last Updated: 2025-01-27
| Query Type | Agent File Path |
|---|---|
| Crate info/version | |
| Rust version features | |
| Std library docs | |
| Third-party crate docs | |
| Clippy lints | |
../../agents/run_in_background: trueTask(
subagent_type: "general-purpose",
run_in_background: true,
prompt: <read from ../../agents/*.md file>
)| Query Type | Agent File | Source |
|---|---|---|
| Rust version features | | releases.rs |
| Crate info/version | | lib.rs, crates.io |
| Std library docs (Send, Sync, Arc, etc.) | | doc.rust-lang.org |
| Third-party crate docs (tokio, serde, etc.) | | docs.rs |
| Clippy lints | | rust-clippy docs |
User: "tokio latest version"
Claude:
1. Read ../../agents/crate-researcher.md
2. Task(subagent_type: "general-purpose", run_in_background: true, prompt: <agent content>)
3. Wait for agent
4. Summarize resultsUser: "What's new in Rust 1.85?"
Claude:
1. Read ../../agents/rust-changelog.md
2. Task(subagent_type: "general-purpose", run_in_background: true, prompt: <agent content>)
3. Wait for agent
4. Summarize features1. actionbook: mcp__actionbook__search_actions("lib.rs crate info")
2. Get action details: mcp__actionbook__get_action_by_id(<action_id>)
3. agent-browser CLI (or WebFetch fallback):
- open "https://lib.rs/crates/{crate_name}"
- get text using selector from actionbook
- close
4. Parse and format output## {Crate Name}
**Version:** {latest}
**Description:** {description}
**Features:**
- `feature1`: description
**Links:**
- [docs.rs](https://docs.rs/{crate}) | [crates.io](https://crates.io/crates/{crate}) | [repo]({repo_url})1. actionbook: mcp__actionbook__search_actions("releases.rs rust changelog")
2. Get action details for selectors
3. agent-browser CLI (or WebFetch fallback):
- open "https://releases.rs/docs/1.{version}.0/"
- get text using selector from actionbook
- close
4. Parse and format output## Rust 1.{version}
**Release Date:** {date}
### Language Features
- Feature 1: description
- Feature 2: description
### Library Changes
- std::module: new API
### Stabilized APIs
- `api_name`: description1. Construct URL: "https://doc.rust-lang.org/std/{path}/"
- Traits: std/{module}/trait.{Name}.html
- Structs: std/{module}/struct.{Name}.html
- Modules: std/{module}/index.html
2. agent-browser CLI (or WebFetch fallback):
- open <url>
- get text "main .docblock"
- close
3. Parse and format output| Item | Path |
|---|---|
| Send, Sync, Copy, Clone | |
| Arc, Mutex, RwLock | |
| Rc, Weak | |
| RefCell, Cell | |
| Box | |
| Vec | |
| String | |
## std::{path}::{Name}
**Signature:**
```rust
{signature}{example_code}
### Third-Party Crate Docs (tokio, serde, etc.)
**Output Format:**
```markdown
## {crate}::{path}
**Signature:**
```rust
{signature}{example_code}
### Clippy Lints
**Output Format:**
```markdown
## Clippy Lint: {lint_name}
**Level:** {warn|deny|allow}
**Category:** {category}
**Description:**
{what_it_checks}
**Example (Bad):**
```rust
{bad_code}{good_code}
---
## Tool Chain Priority
Both modes use the same tool chain order:
1. **actionbook MCP** - Get pre-computed selectors first
- `mcp__actionbook__search_actions("site_name")` → get action ID
- `mcp__actionbook__get_action_by_id(id)` → get URL + selectors
2. **agent-browser CLI** - Primary execution tool
```bash
agent-browser open <url>
agent-browser get text <selector_from_actionbook>
agent-browser closeactionbook → agent-browser → WebFetch (only if agent-browser unavailable)| Deprecated | Use Instead | Reason |
|---|---|---|
| WebSearch for crate info | Task + agent or inline mode | Structured data |
| Direct WebFetch | actionbook + agent-browser | Pre-computed selectors |
| Guessing version numbers | Always fetch from source | Prevents misinformation |
| Error | Cause | Solution |
|---|---|---|
| Agent file not found | Skills-only install | Use inline mode |
| actionbook unavailable | MCP not configured | Fall back to WebFetch |
| agent-browser not found | CLI not installed | Fall back to WebFetch |
| Agent timeout | Site slow/down | Retry or inform user |
| Empty results | Selector mismatch | Report and use WebFetch fallback |