February 1, 2026
Skynet, but make it plug-and-play
Show HN: Sandbox Agent SDK – unified API for automating coding agents
One remote for all code-writing bots—fans cheer, newbies confused, skeptics want proof
TLDR: Sandbox Agent SDK aims to unify different code-writing bots behind one easy controller. The community wants a quick demo and real-world use cases, eyeing missing features and “experimental” tags—important because it could simplify building apps without juggling multiple agent tools.
Meet Sandbox Agent SDK, pitched as a single control panel for all the code‑writing bots—Claude Code, Codex, OpenCode, Amp—whether you run it as a tiny server or drop-in toolkit. The crowd vibe? Equal parts hype and huh? Top comment begged for a short demo video (“how it feels”), while another admitted they don’t “fully grok” what to use it for. Fans love the “install with one curl” flex and the Inspector for snooping on sessions, but skeptics zeroed in on the feature grid: Claude’s “tool calls” are “coming imminently,” and OpenCode/Amp are marked experimental—cue side‑eye.
Use-case debates popped fast: team automation, CI helpers, and “let a bot refactor this mess” got cheers; others warned it could become “one more layer to debug.” A mini‑meme formed around “universal remote for Skynet,” and someone joked HITL (human in the loop) is just the bot asking permission like a polite intern. The split: builders want to wire up multiple agents behind one API; newcomers want a clicky UI and a 90‑second walkthrough. Devs dropped docs and promised easy OpenAPI integration; the peanut gallery demanded show‑and‑tell and asked if it truly replaces juggling five different agent setups. Verdict: intrigued, but receipts requested.
Key Points
- •Sandbox Agent provides a universal API and session schema to integrate multiple coding agents (Claude Code, Codex, OpenCode, Amp).
- •It runs as a Rust-based HTTP server or via a TypeScript SDK in embedded mode, with automatic agent installation on first use.
- •Compatibility matrix shows Claude Code and Codex as stable; OpenCode and Amp are experimental, with feature coverage detailed per agent.
- •Supported features include text, tool calls/results, images, file attachments, session lifecycle, error events, reasoning, command execution, file changes, MCP tools, and streaming deltas.
- •Components include a Rust server daemon, TypeScript SDK, Inspector UI, and CLI; installation and quickstart commands are provided along with an OpenAPI spec.