Show HN: Tired of duct-taping access control into agent prompts. Here's the fix
Summary
Show HN describes Cast, an open-source, self-hosted harness for multi-user, multi-agent systems built to manage access control outside of agent prompts. It outlines the motivation (moving access rules from prompts to config), how Cast works (design, routing, identity, and agent orchestration), and how to run and contribute.