Official agent skill

Actions

Guidelines for implementing IntelliJ actions (AnAction). An agent skill from JetBrains/MPS.

OfficialApache-2.0Auto-check passedMobile

Install Actions

skills CLI

$ npx skills add JetBrains/MPS --skill actions -a claude-code

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

GitHub CLI

$ gh skill install JetBrains/MPS actions --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/JetBrains/MPS.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/actions .claude/skills/actions && 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/

Paste into Claude Code

Install the "actions" agent skill from https://github.com/JetBrains/MPS/tree/master/.agents/skills/actions into .claude/skills/actions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "actions", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/JetBrains/MPS/tree/master/.agents/skills/actions

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add JetBrains/MPS --skill actions -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install JetBrains/MPS actions --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/JetBrains/MPS.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/actions .agents/skills/actions && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "actions" agent skill from https://github.com/JetBrains/MPS/tree/master/.agents/skills/actions into .agents/skills/actions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "actions", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add JetBrains/MPS --skill actions -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install JetBrains/MPS actions --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/JetBrains/MPS.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/actions .cursor/skills/actions && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "actions" agent skill from https://github.com/JetBrains/MPS/tree/master/.agents/skills/actions into .cursor/skills/actions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "actions", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/JetBrains/MPS.git --path .agents/skills/actions

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add JetBrains/MPS --skill actions -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install JetBrains/MPS actions --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/JetBrains/MPS.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/actions .gemini/skills/actions && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "actions" agent skill from https://github.com/JetBrains/MPS/tree/master/.agents/skills/actions into .gemini/skills/actions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "actions", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install JetBrains/MPS actions

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add JetBrains/MPS --skill actions -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/JetBrains/MPS.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/actions .github/skills/actions && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "actions" agent skill from https://github.com/JetBrains/MPS/tree/master/.agents/skills/actions into .github/skills/actions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "actions", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add JetBrains/MPS --skill actions -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install JetBrains/MPS actions --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/JetBrains/MPS.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/actions .opencode/skills/actions && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "actions" agent skill from https://github.com/JetBrains/MPS/tree/master/.agents/skills/actions into .opencode/skills/actions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "actions", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: actions
GitHub stars: 1.7k
Token cost: ~318 tokens
SKILL.md length: 85 words
Files: 1
Skills in repo: 40
Repo updated: Oct 7, 2026
First seen: Oct 8, 2026
Licence: Apache-2.0

At a glance

Guidelines for implementing IntelliJ actions (AnAction). An agent skill from JetBrains/MPS.

Works in 3 steps: Set the id attribute for the action in… → Optionally set the icon attribute if an… → Set text and description in the message…
Mobile work in your project
SKILL.md covers Documentation and Best Practices
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Actions is an agent skill from JetBrains/MPS, published by the product's own GitHub organization. Guidelines for implementing IntelliJ actions (AnAction). Use those rules when you need to create or change an action in the intellij platform.

Its SKILL.md is about 320 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 Mobile. It works with JetBrains IDEs and Kotlin. The repository describes itself as: JetBrains Meta programming System. The licence is Apache-2.0.

When your agent uses it

Mobile work in your project

Example prompts

“Use the actions skill to guideline for implementing IntelliJ actions (AnAction). An agent skill from JetBrains/MPS”
“/actions”

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

Set the id attribute for the action in plugin.xml
Optionally set the icon attribute if an icon is needed
Set text and description in the message bundle (e.g., GitBundle.properties)

What it can do on your machine

Read from SKILL.md and the folder at commit a92f944. 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 (its code samples are kotlin, xml and properties).
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

Actions loads about 318 tokens when it runs. Until then it costs about 38 tokens; SKILL.md has 85 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~38
When it runs · the whole SKILL.md, loaded when a task matches: ~318

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 JetBrains/MPS at commit a92f944, republished under its Apache-2.0 licence (© JetBrains). 85 words, ~318 tokens.

Download SKILL.mdSave it as .claude/skills/actions/SKILL.md (or your agent's skills folder).

name: actions
description: Guidelines for implementing IntelliJ actions (AnAction). Use those rules when you need to create or change an action in the intellij platform.

Actions

Guidelines for implementing IntelliJ actions (AnAction).

Documentation

Action System - Architecture and usage of the action system

Best Practices

NEVER instantiate Presentation in action constructors - Use no-argument constructors
Define text, description, and icon in plugin.xml - Not in constructor parameters
Follow the convention:
1. Set the id attribute for the action in plugin.xml
2. Optionally set the icon attribute if an icon is needed
3. Set text and description in the message bundle (e.g., GitBundle.properties):
- action.<action-id>.text=Translated Action Text
- action.<action-id>.description=Translated Action Description

Good example:

Kotlin:

kotlin

class MyAction : AnAction()

plugin.xml:

xml

<action id="My.Action.Id"
        class="my.package.MyAction"
        icon="my.package.MyIcons.ICON"/>

Bundle.properties:

properties

action.My.Action.Id.text=My Action
action.My.Action.Id.description=Description of my action

Files

Just SKILL.md in .agents/skills/actions of JetBrains/MPS.

Open the folder on GitHubat commit a92f944

Compare with similar skills

Actions 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.

Actions compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Actions this skillJetBrains/MPS	1.7k	—	~318	Automated safety check: Pass	Apache-2.0	yesterday
Compose Multiplatform Patternsmonta-app/ocpp-emulator	180	5 repos	~2k	Automated safety check: Pass	Apache-2.0	7 days ago
Code StyleJetBrains/intellij-community	21k	—	~795	Automated safety check: Pass	Custom licence	yesterday
Drop Platform SupportJetBrains/educational-plugin	181	—	~4k	Automated safety check: Pass	Apache-2.0	2 days ago
Kotlin Tooling Kotlin ToolchainKotlin/kotlin-agent-skills	1.1k	—	~2.4k	Automated safety check: Pass	Apache-2.0	9 days ago
Migrate Intellij Utilflutter/flutter-intellij	2k	—	~600	Automated safety check: Pass	BSD-3-Clause	yesterday

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Works with

Questions about Actions

What does Actions do?

Guidelines for implementing IntelliJ actions (AnAction). An agent skill from JetBrains/MPS. Actions is an agent skill from JetBrains/MPS, published by the product's own GitHub organization. Guidelines for implementing IntelliJ actions (AnAction).

When should I use Actions?

Actions fits situations like: mobile work in your project.

How do I install Actions in Claude Code?

Run `npx skills add JetBrains/MPS --skill actions -a claude-code`. Or copy the skill folder (.agents/skills/actions in JetBrains/MPS) into .claude/skills/actions in your project. Claude Code loads it when a task matches its description.

How do I install Actions in Codex?

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

Can I use Actions 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 JetBrains/MPS --skill actions -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/actions, .gemini/skills/actions, .github/skills/actions and .opencode/skills/actions in your project.

What does Actions need to run?

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

Does Actions 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 Actions 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 Actions use?

Actions 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 Actions use?

About 318 tokens (SKILL.md is roughly 1.3k 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 Actions?

Skills that share tags, products or a category with Actions: Compose Multiplatform Patterns (monta-app/ocpp-emulator, 180 stars), Code Style (JetBrains/intellij-community, 21k stars), Drop Platform Support (JetBrains/educational-plugin, 181 stars) and Kotlin Tooling Kotlin Toolchain (Kotlin/kotlin-agent-skills, 1.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Actions?

JetBrains (a GitHub organization, an official publisher) maintains it in JetBrains/MPS, which has 1,660 GitHub stars. The repository holds 40 skills in this directory. The repository was last updated on October 7, 2026.

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

Install Actions

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Actions

Documentation

Best Practices

Files

Compare with similar skills

Similar skills

More from JetBrains/MPS

Related

Questions about Actions