I m building an agent sandbox platform with opinionated customizable templates for general purpose agents using the OpenCode SDK.The idea is to provide a great CLI experience so it s easy to use an AI client like Claude Code or Codex to launch sandboxes, fetch/retrieve data and prompts, review generated outputs, and manage queues for ask-user questions.I also plan to add an AI gateway layer, similar to Tailscale Aperture(not affiliated but one of their engineers gave a great talk at AI Engineer it s on YT) for monitoring network access, distributing secrets, and controlling what services/systems a sandbox has access to.For people building agent workflows, I d love to hear feedback if you ve tried other sandbox solutions.What was missing and what was the hard part?