Stackblitz Pack
Production StackBlitz workflows for WebContainer lifecycle, embeds, testing, diagnostics, capacity, and security (10 skills)
- Type
- Plugin
- Repository
- jeremylongshore/tons-of-skills-marketplace
- GitHub stars
- 2.8k
- License
- MIT
- Repo last updated
- Sep 27, 2026
- Version
- 1.7.0
- Author
- Jeremy Longshore
What Stackblitz Pack is
Stackblitz Pack is a plugin published in the jeremylongshore/tons-of-skills-marketplace repository on GitHub, which has about 2.8k stars. The repository describes itself as: “Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com.”
A plugin is a package that bundles skills, slash commands, subagents, hooks, and MCP connectors so they install together. Plugins are plain files with a manifest at .claude-plugin/plugin.json, and they work in both Claude Code and Claude Cowork.
Installing Stackblitz Pack adds everything it ships in one step. Connectors inside a plugin still need to be connected separately, and hooks and subagents only run in Cowork and Claude Code, not in regular chat.
How to install Stackblitz Pack
Claude Code
- Add the repository as a plugin marketplace: claude plugin marketplace add jeremylongshore/tons-of-skills-marketplace
- Install the plugin: claude plugin install stackblitz-pack@<marketplace-name>, using the marketplace name from the repository's .claude-plugin/marketplace.json.
- Restart the session if the new skills or commands don't appear straight away.
Claude Cowork
- Open Customize → Plugins and choose Add marketplace.
- Enter jeremylongshore/tons-of-skills-marketplace (the owner/repo shorthand works for GitHub).
- Find Stackblitz Pack in the list, click Install, then connect any connectors it needs from its Connectors tab.
New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.
Inside the source file
An excerpt from plugins/saas-packs/stackblitz-pack/.claude-plugin/plugin.json, shared under the repository's MIT license. Read the full file on GitHub.
Ten production-oriented skills for StackBlitz WebContainers and JavaScript SDK integrations. The pack covers integration preflight, lifecycle ownership, controlled runtime verification, browser testing, custom experience architecture, embeds, evidence-led troubleshooting, privacy-safe diagnostics, measured capacity, and security review.
Installation
/plugin install stackblitz-pack@claude-code-plugins-plusSkills
Authority and Safety
Each skill links to checked first-party StackBlitz and WebContainers documentation. Installed dependency types and repository configuration govern implementation details. The workflows do not assume that browser containment makes user code trustworthy, do not mount secrets into user-controlled projects, and do not claim undocumented universal resource quotas.
License
MIT
Before you install
- Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
- Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
- Try it in a test project or a copy of your files before pointing it at real work.
- Pin the version you tested, and review changes before updating.
- Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.
FAQ
What is Stackblitz Pack?
Stackblitz Pack is a plugin for Claude Code and Claude Cowork from the jeremylongshore/tons-of-skills-marketplace repository on GitHub. Production StackBlitz workflows for WebContainer lifecycle, embeds, testing, diagnostics, capacity, and security (10 skills)
How do I install Stackblitz Pack in Claude Code?
Add the repository as a plugin marketplace: claude plugin marketplace add jeremylongshore/tons-of-skills-marketplace Install the plugin: claude plugin install stackblitz-pack@<marketplace-name>, using the marketplace name from the repository's .claude-plugin/marketplace.json. Restart the session if the new skills or commands don't appear straight away.
Can I use Stackblitz Pack in Claude Cowork?
Open Customize → Plugins and choose Add marketplace. Enter jeremylongshore/tons-of-skills-marketplace (the owner/repo shorthand works for GitHub). Find Stackblitz Pack in the list, click Install, then connect any connectors it needs from its Connectors tab.
Is Stackblitz Pack safe to install?
It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.
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