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# guyoung/wasm-sandbox-node
- **Archetype**: clawhub-plugin
- **Stars**: 0
- **Last pushed**: 2026-04-11
- **License**: MIT
- **Discovered**: 2026-04-12
- **Language**: JavaScript
- **Fork**: No
## Summary
WebAssembly-based sandboxed execution environment for AI agents. Three components: (1) wasm-sandbox runtime -- the core WASM execution engine, (2) wasm-sandbox CLI -- command-line interface, (3) wasm-sandbox plugin for OpenClaw. A companion repo (wasm-sandbox-openclaw-skills) provides pre-built WASM skills: boxed-curl, boxed-fetch, boxed-ffmpeg, boxed-fs, boxed-http-server, graphviz, opencv, pandoc-rs.
The architecture isolates agent-executed code in WebAssembly sandboxes, preventing filesystem/network access outside defined boundaries. Each skill runs in its own WASM container with capability-based permissions.
## Assessment
MEDIUM extractable value. The WASM sandboxing approach is directly relevant to babysitter's Security & Sandboxing plugin category. The capability-based permission model per skill and the pre-built "boxed" tool variants (curl, fetch, ffmpeg, fs, http-server) demonstrate a practical sandboxing pattern. Low star count but novel architecture.
**Extraction priority**: MEDIUM
# Extractable Value: guyoung/wasm-sandbox-node
## Processes
None -- sandboxing is a plugin concern, not a process.
## Plugin Ideas
### 1. WASM Sandbox Plugin
- **Category**: Security & Sandboxing
- **install.md**: Installs a WebAssembly-based sandboxed execution environment for agent tool calls. Each tool runs in its own WASM container with capability-based permissions (filesystem paths, network hosts, environment variables). Ships with pre-built sandboxed variants of common tools: curl, fetch, ffmpeg, fs operations, HTTP server, graphviz, opencv, pandoc. Prevents agents from accessing filesystem/network outside defined boundaries.
## Library Mapping
| Extractable Process | Library Status | Action | Existing Path | Target Placement |
|-------------------|----------------|--------|---------------|------------------|
| N/A | N/A | No multi-step processes identified - sandboxing is a plugin concern, not a process | - | N/A |
## Plugin Marketplace Mapping
| Plugin Idea | Marketplace Status | Action | Existing Plugin | Target Placement |
|-------------|-------------------|--------|-----------------|------------------|
| WASM Sandbox Environment | UPGRADE | WebAssembly-based sandboxing beyond existing Docker/chroot approaches | plugins/a5c/marketplace/blueprints/basic-security/ | plugins/a5c/marketplace/blueprints/wasm-sandbox-environment/ |
## Implicit Procedural Knowledge
- **WASM sandboxing for agent tools**: Using WebAssembly as the isolation boundary for agent-executed code. Each tool gets its own WASM container with defined capabilities. This is more granular than OS-level sandboxing (Docker/chroot) and more portable.
- **"Boxed" tool pattern**: Wrapping common CLI tools (curl, ffmpeg, pandoc) in sandboxed variants that expose the same interface but enforce permission boundaries. This pattern could be applied to any babysitter task execution to limit blast radius.
- **Capability-based permissions**: Per-skill permission sets (which paths can be read/written, which hosts can be contacted) rather than global allow/deny lists. Maps to babysitter's task execution model where each task could have defined capabilities.
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