Tired of duct-taping access control into agent prompts. Here's the fix
Your agent team, on your machine. Open-source harness for multi-user Claude agents. - yaodub/cast
Tired of duct-taping access control into agent prompts. Here's the fix launched on June 3, 2026 with 22 votes, #824 of 22,647 launches that month and more than 90% of that year's launches.
In plain words
This is an access control solution designed for AI agents that replaces ad-hoc prompt-based security measures. It provides developers with a dedicated tool to manage what agents can and cannot do, rather than embedding permissions directly into prompts. The solution targets teams building AI systems who need cleaner, more maintainable security architecture for their agent deployments.
written from the facts on this page · September 2026
From the sources
Cast runs a small team of AI agents on your own machine. An agent is a folder, and you write its job in plain English. Each agent runs in a container whose network only reaches the model provider and any domains you whitelist. Its only way in or out is code running outside the container. That code gives the agent a fixed set of known actions. Every message reaching the agent is identity-checked. Service credentials never enter the container. Cast is designed for agents doing standing work, and to be secure enough to work with real accounts. ~/.cast/agents/ ├── mailhand/ "Read my inbox at 7. Flag what needs me, draft the routine replies." ├── repowatch/ "Watch my repos. Log what changed and…from github.com
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