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Agent skill

Rust Learner

by actionbook in actionbook/actionbook

Learn Rust language features and crate updates. An agent skill from actionbook/actionbook.

Apache-2.0Auto-check passedDevelopment

Install Rust Learner

skills CLI
$ npx skills add actionbook/actionbook --skill rust-learner -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install actionbook/actionbook rust-learner --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/actionbook/actionbook.git skills-src && mkdir -p .claude/skills && cp -r skills-src/playground/rust-learner/skills/rust-learner .claude/skills/rust-learner && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
rust-learner
GitHub stars
1.6k
Token cost
~431 tokens
SKILL.md length
113 words
Files
1
Skills in repo
13
Repo updated
First seen
Licence
Apache-2.0

At a glance

Learn Rust language features and crate updates. An agent skill from actionbook/actionbook.

  • Works in 4 steps: actionbook MCP → Launch browser-fetcher agents → Wait for ALL agents to complete → …
  • User asks about Rust version changelog
  • SKILL.md covers ⚠️ Tool Priority & Waiting Rule, Workflow and Example
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Rust Learner is an agent skill from actionbook/actionbook. Learn Rust language features and crate updates. Use when user asks about Rust version changelog, what's new in Rust, crate updates, Cargo.toml dependencies, tokio/serde/axum features, or any Rust ecosystem questions.

Its SKILL.md is about 430 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Changelog and release notes. It works with Rust. The repository describes itself as: Let your AI agent get the sources behind logins and paywalls. The licence is Apache-2.0.

When your agent uses it

  • User asks about Rust version changelog
  • Whats new in Rust
  • Cargo.toml dependencies
  • Tokio/serde/axum features

Example prompts

  • “/rust-learner”

Workflow steps

4 steps, taken from the step headings in SKILL.md.

  1. actionbook MCP
  2. Launch browser-fetcher agents
  3. Wait for ALL agents to complete
  4. Summarize results

What it can do on your machine

Read from SKILL.md and the folder at commit 0e31254. 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

    No scripts in the folder and no shell commands in SKILL.md.

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

  • Network

    No URLs in SKILL.md.

    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

Rust Learner loads about 431 tokens when it runs. Until then it costs about 57 tokens; SKILL.md has 113 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~57
When it runs · the whole SKILL.md, loaded when a task matches
~431

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

Auto-check passed

The automated check found no risky patterns in SKILL.md.

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 actionbook/actionbook at commit 0e31254, republished under its Apache-2.0 licence (© actionbook). 113 words, ~431 tokens.

Download SKILL.mdSave it as .claude/skills/rust-learner/SKILL.md (or your agent's skills folder).
name
rust-learner
description
Learn Rust language features and crate updates. Use when user asks about Rust version changelog, what's new in Rust, crate updates, Cargo.toml dependencies, tokio/serde/axum features, or any Rust ecosystem questions.

Rust Learner

Learn Rust by fetching real-time information about Rust language features and crate updates.

⚠️ Tool Priority & Waiting Rule

Priority:

  1. ✅ browser-fetcher agent (preferred)
  2. ⚠️ Fetch / WebFetch (only after all browser-fetcher agents fail)
  3. ⚠️ WebSearch (only when search engine results are needed)

⛔ No "Racing Ahead":

  • After launching browser-fetcher agents, MUST wait for ALL of them to complete
  • DO NOT use WebSearch/Fetch as "supplements" while waiting
  • Only use fallback tools after ALL browser-fetcher agents have failed

Workflow

Step 1: actionbook MCP
search_actions("lib.rs crate")  → get action ID
get_action_by_id(id)            → get URL and selectors
Step 2: Launch browser-fetcher agents
Launch multiple browser-fetcher agents in parallel
Step 3: Wait for ALL agents to complete
⛔ DO NOT use other tools during this time
✅ Wait for TaskOutput to return all results
Step 4: Summarize results
  • If agents succeed: summarize content for user
  • If ALL agents fail: use Fetch as fallback

Example

User: Query tokio latest version

✅ CORRECT:
1. Launch browser-fetcher: lib.rs/crates/tokio
2. Launch browser-fetcher: crates.io/crates/tokio
3. Wait for BOTH agents to complete
4. Summarize results

❌ WRONG:
1. Launch browser-fetcher agents
2. While waiting, use WebSearch("tokio latest")  ← Racing ahead!
3. Mix multiple result sources

© actionbook, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in playground/rust-learner/skills/rust-learner of actionbook/actionbook.

Open the folder on GitHubat commit 0e31254

Compare with similar skills

Rust Learner next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Rust Learner compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Rust Learner this skillactionbook/actionbook1.6k—~431Automated safety check: PassApache-2.0
Release Skillsnexmoe/eve4213 repos~3.3kAutomated safety check: PassNone
Aptos CLI Releaseaptos-labs/aptos-core6.4k—~431Automated safety check: PassCustom licence
Worktrunk Release Workflowmax-sixty/worktrunk8.9k—~6.9kAutomated safety check: PassCustom licence
Cut Releasedelexw/claude-code-trace3761 repos~1.4kAutomated safety check: PassMIT
Releasexin2017338/lynx-proxy502—~1.1kAutomated safety check: PassMIT

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Works with

Categories

Questions about Rust Learner

What does Rust Learner do?

Learn Rust language features and crate updates. An agent skill from actionbook/actionbook. Rust Learner is an agent skill from actionbook/actionbook. Learn Rust language features and crate updates.

When should I use Rust Learner?

Rust Learner fits situations like: user asks about Rust version changelog; whats new in Rust; cargo.toml dependencies; tokio/serde/axum features.

How do I install Rust Learner in Claude Code?

Run `npx skills add actionbook/actionbook --skill rust-learner -a claude-code`. Or copy the skill folder (playground/rust-learner/skills/rust-learner in actionbook/actionbook) into .claude/skills/rust-learner in your project. Claude Code loads it when a task matches its description.

How do I install Rust Learner in Codex?

Run `npx skills add actionbook/actionbook --skill rust-learner -a codex`. Or copy the skill folder (playground/rust-learner/skills/rust-learner in actionbook/actionbook) into .agents/skills/rust-learner in your project. Codex loads it when a task matches its description.

Can I use Rust Learner in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add actionbook/actionbook --skill rust-learner -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/rust-learner, .gemini/skills/rust-learner, .github/skills/rust-learner and .opencode/skills/rust-learner in your project.

What does Rust Learner need to run?

SKILL.md names no scripts, command-line tools or credentials: Rust Learner is instructions for the agent only.

Does Rust Learner access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Rust Learner safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Rust Learner use?

Rust Learner is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Rust Learner use?

About 431 tokens (SKILL.md is roughly 1.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Rust Learner?

Skills that share tags, products or a category with Rust Learner: Release Skills (nexmoe/eve, 421 stars), Aptos CLI Release (aptos-labs/aptos-core, 6.4k stars), Worktrunk Release Workflow (max-sixty/worktrunk, 8.9k stars) and Cut Release (delexw/claude-code-trace, 376 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Rust Learner?

actionbook (a GitHub organization) maintains it in actionbook/actionbook, which has 1,609 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on September 8, 2026.

Source: actionbook/actionbook on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.