stackblitz-rate-limits
WebContainer resource limits: memory, CPU, file system size, process count. Use when working with WebContainers or StackBlitz SDK. Trigger: "webcontainer limits".
Best use case
stackblitz-rate-limits is best used when you need a repeatable AI agent workflow instead of a one-off prompt.
WebContainer resource limits: memory, CPU, file system size, process count. Use when working with WebContainers or StackBlitz SDK. Trigger: "webcontainer limits".
Teams using stackblitz-rate-limits should expect a more consistent output, faster repeated execution, less prompt rewriting.
When to use this skill
- You want a reusable workflow that can be run more than once with consistent structure.
When not to use this skill
- You only need a quick one-off answer and do not need a reusable workflow.
- You cannot install or maintain the underlying files, dependencies, or repository context.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/stackblitz-rate-limits/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How stackblitz-rate-limits Compares
| Feature / Agent | stackblitz-rate-limits | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
WebContainer resource limits: memory, CPU, file system size, process count. Use when working with WebContainers or StackBlitz SDK. Trigger: "webcontainer limits".
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
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SKILL.md Source
# StackBlitz Rate Limits
## Overview
WebContainer resource limits: memory, CPU, file system size, process count.
## Instructions
### Step 1: WebContainer Resource Limits
| Resource | Limit | Notes |
|----------|-------|-------|
| Memory | ~2GB | Shared with browser tab |
| File system | Ephemeral, in-memory | Lost on page refresh |
| Processes | Multiple concurrent | Each consumes memory |
| Network | HTTP only | No raw TCP/UDP sockets |
| npm packages | Most work | Native addons not supported |
### Step 2: Handle Memory Pressure
```typescript
// Monitor memory usage inside WebContainer
const proc = await wc.spawn('node', ['-e', `
setInterval(() => {
const mem = process.memoryUsage();
const mbUsed = Math.round(mem.heapUsed / 1024 / 1024);
if (mbUsed > 500) console.warn('High memory: ' + mbUsed + 'MB');
}, 5000);
`]);
```
### Step 3: Optimize File System Size
```typescript
// Mount only essential files -- skip test files, docs, etc.
const productionFiles: FileSystemTree = {
'package.json': { file: { contents: minimalPackageJson } },
src: { directory: { /* only source files */ } },
// Skip: tests/, docs/, .git/, large assets
};
await wc.mount(productionFiles);
```
## Error Handling
| Issue | Cause | Solution |
|-------|-------|----------|
| Tab crashes | OOM | Reduce mounted files, fewer deps |
| Slow npm install | Large deps | Use --prefer-offline, fewer packages |
| Process killed | Memory limit | Monitor with memoryUsage() |
## Resources
- [WebContainer Guides](https://webcontainers.io/guides/introduction)
## Next Steps
For security, see `stackblitz-security-basics`.Related Skills
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