exec-guard

Safe command execution for AI agents with timeout control, 8KB ring buffer memory protection, background process management, and multi-agent sharing via HTTP service. Use when executing system commands, running long tasks, starting services, or managing background processes. Supports CLI and HTTP server modes.

exec-guard - AI Agent Command Execution Module

Safe and reliable system command execution for AI agents.

Quick Start

CLI Mode

bash

echo '{"command": "ls -la"}' | node scripts/dist/index.js

HTTP Service Mode

bash

node scripts/dist/index.js --server --port 8080
curl -X POST http://localhost:8080/exec -H "Content-Type: application/json" -d '{"command": "ls -la"}'

Core Capabilities

Capability	Description
Sync Execution	Execute command with timeout, wait for result
Background Execution	Start long tasks, get PID, query later
Watch Window	Confirm service startup before returning
8KB Ring Buffer	Head-Tail dual buffer prevents OOM
Process Management	Query status, get logs, terminate processes
Multi-Agent Sharing	HTTP service allows multiple agents to share state

API Reference

POST /exec

Execute a command:

json

{
  "command": "required - system command",
  "workingDir": "optional - working directory",
  "timeoutSeconds": "optional - default 30",
  "runInBackground": "optional - default false",
  "watchDurationSeconds": "optional - for service startup",
  "env": "optional - custom environment variables"
}

GET /process/:pid

Query process status.

GET /process/:pid/logs

Get process output logs.

DELETE /process/:pid

Terminate a process.

GET /processes

List all background processes.

Response Status

Status	Meaning
success	Command completed, exit code 0
failed	Command failed, non-zero exit
timeout	Command killed after timeout
killed	Process manually terminated
running	Background process active

Best Practices

1. Set reasonable timeout - Prevent stuck commands
2. Use watch window for services - Confirm startup success
3. Use background mode for long tasks - Training, data processing
4. Clean up processes - Terminate when done

Full Documentation

See references/AGENT_GUIDE.md for detailed usage guide and examples.

License

MIT