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Agent skill

Playground Snapshot Release

by mastra-ai in mastra-ai/mastra

Publish a Playground UI snapshot (@mastra/playground-ui and its workspace dependencies) from main or the current branch via the playground-snapshot mode of the Publish to npm workflow, wait for it…

Custom licenceAuto-check passedDevelopment

Install Playground Snapshot Release

skills CLI
$ npx skills add mastra-ai/mastra --skill playground-snapshot-release -a claude-code

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

GitHub CLI
$ gh skill install mastra-ai/mastra playground-snapshot-release --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/mastra-ai/mastra.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.mastracode/skills/playground-snapshot-release .claude/skills/playground-snapshot-release && 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
playground-snapshot-release
GitHub stars
29k
Token cost
~1.7k tokens
SKILL.md length
642 words
Files
1
Skills in repo
44
Repo updated
First seen
Licence
Custom licence

At a glance

Publish a Playground UI snapshot (@mastra/playground-ui and its workspace dependencies) from main or the current branch via the playground-snapshot mode of the Publish to npm workflow, wait for it…

  • Works in 8 steps: Ask which branch → Prepare the branch → Choose the tag → …
  • Asked to release
  • SKILL.md covers 1. Ask which branch, 2. Prepare the branch, 3. Choose the tag and 4. Dispatch, plus 4 more sections
  • Calls git, gh and pnpm

What it does

Playground Snapshot Release is an agent skill from mastra-ai/mastra. Publish a Playground UI snapshot (@mastra/playground-ui and its workspace dependencies) from main or the current branch via the playground-snapshot mode of the Publish to npm workflow, wait for it to finish, then open a PR on mastra-ai/platform bumping the frontend to the published snapshot version. Use when asked to release, publish, or ship a playground/studio UI snapshot to the platform frontend.

Its SKILL.md is about 1.7k 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 Pull requests. It works with Mastra, npm and Git. The repository describes itself as: Mastra is the modern TypeScript framework for AI-powered applications and agents.

When your agent uses it

  • Asked to release
  • Ship a playground/studio UI snapshot to the platform frontend

Example prompts

  • “/playground-snapshot-release”

Workflow steps

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

  1. Ask which branch
  2. Prepare the branch
  3. Choose the tag
  4. Dispatch
  5. Wait for completion
  6. Resolve the published version
  7. Open the platform PR
  8. Report

What it can do on your machine

Read from SKILL.md and the folder at commit b98829a. 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

    Shell commands in SKILL.md call:

    • git
    • gh
    • pnpm
    • npm

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

  • Network

    No URLs in SKILL.md. Its commands use git, gh, pnpm and npm, which can reach the network depending on how they are called.

    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

Playground Snapshot Release loads about 1.7k tokens when it runs. Until then it costs about 110 tokens; SKILL.md has 642 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~110
When it runs · the whole SKILL.md, loaded when a task matches
~1.7k

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 642 words (~1,728 tokens).

“Dispatches .github/workflows/npm-publish.yml with publish_type=playground-snapshot. That job publishes only @mastra/playground-ui and its non-private workspace dependencies (currently @mastra/ai-sdk, @mastra/client-js, @mastra/core, @mastra/schema-compat, @mastra/react) at version 0.0.0--. It refuses to run on main, and publishes real immutable npm versions.”

— opening of SKILL.md by mastra-ai, Custom licence
name
playground-snapshot-release

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .mastracode/skills/playground-snapshot-release of mastra-ai/mastra.

Open the folder on GitHubat commit b98829a

Compare with similar skills

Playground Snapshot Release 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.

Playground Snapshot Release compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Playground Snapshot Release this skillmastra-ai/mastra29k—~1.7kAutomated safety check: PassCustom licence
Open Code Review CLIalibaba/open-code-review46k—~3.1kAutomated safety check: PassApache-2.0
Verdaccio Pull Request Workflowverdaccio/verdaccio18k—~1.9kAutomated safety check: PassMIT
Code Reviewyaklang/yakit7.8k—~1.5kAutomated safety check: NotesAGPL-3.0
AionUi Version BumpiOfficeAI/AionUi33k—~2.1kAutomated safety check: PassApache-2.0
ZCF Release AutomationUfoMiao/zcf6.1k—~3.4kAutomated safety check: PassMIT

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Works with

Categories

Questions about Playground Snapshot Release

What does Playground Snapshot Release do?

Publish a Playground UI snapshot (@mastra/playground-ui and its workspace dependencies) from main or the current branch via the playground-snapshot mode of the Publish to npm workflow, wait for it…. Playground Snapshot Release is an agent skill from mastra-ai/mastra. Publish a Playground UI snapshot (@mastra/playground-ui and its workspace dependencies) from main or the current branch via the playground-snapshot mode of the Publish to npm workflow, wait for it to finish, then open a PR on mastra-ai/platform bumping the frontend to the published snapshot version.

When should I use Playground Snapshot Release?

Playground Snapshot Release fits situations like: asked to release; ship a playground/studio UI snapshot to the platform frontend.

How do I install Playground Snapshot Release in Claude Code?

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

How do I install Playground Snapshot Release in Codex?

Run `npx skills add mastra-ai/mastra --skill playground-snapshot-release -a codex`. Or copy the skill folder (.mastracode/skills/playground-snapshot-release in mastra-ai/mastra) into .agents/skills/playground-snapshot-release in your project. Codex loads it when a task matches its description.

Can I use Playground Snapshot Release 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 mastra-ai/mastra --skill playground-snapshot-release -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/playground-snapshot-release, .gemini/skills/playground-snapshot-release, .github/skills/playground-snapshot-release and .opencode/skills/playground-snapshot-release in your project.

What does Playground Snapshot Release need to run?

Going by SKILL.md and its folder, Playground Snapshot Release needs the command-line tools its instructions call (git, gh, pnpm and npm).

Does Playground Snapshot Release access the network?

SKILL.md contains no URLs. Its commands use git, gh and npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Playground Snapshot Release 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 Playground Snapshot Release use?

Playground Snapshot Release has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Playground Snapshot Release use?

About 1.7k tokens (SKILL.md is roughly 6.9k 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 Playground Snapshot Release?

Skills that share tags, products or a category with Playground Snapshot Release: Open Code Review CLI (alibaba/open-code-review, 46k stars), Verdaccio Pull Request Workflow (verdaccio/verdaccio, 18k stars), Code Review (yaklang/yakit, 7.8k stars) and AionUi Version Bump (iOfficeAI/AionUi, 33k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Playground Snapshot Release?

mastra-ai (a GitHub organization) maintains it in mastra-ai/mastra, which has 28,698 GitHub stars. The repository holds 44 skills in this directory. The repository was last updated on October 11, 2026.

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