Permission-Tiered Shared Agent Workspace for Households and Small Teams
Cast open-sourced a harness for multi-user, multi-agent setups after its builder got tired of duct-taping row-level access into prompts, with a live example of a household assistant where a child gets a lower trust tier than parents. The HN debate showed the concept needs explaining, but the underlying problem (one shared agent, several humans, different permissions) appears wherever families and small teams share an assistant. A polished product with trust tiers, not prompt rules, is the wedge.
Problem Statement
A family or small team shares an agent for calendar, purchases, and household coordination. Today the operator either gives everyone full capability or writes prompt instructions like do not let the kid send emails, which the model can be argued past. There is no enforcement layer between conversational access and tool capabilities scoped per human.
The Idea
A shared AI assistant platform where multiple people interact with the same agents under enforced per-person permission tiers for actions like purchases, email, and calendar.
Why Now
Telegram and WhatsApp household agents went from hobby to common in 2025-2026 as harnesses matured, and the first thing every shared deployment hits is permissions: the Cast builder runs exactly this at home and built infrastructure because prompt-level rules cannot be trusted with purchases and email.
Target User
Tech-forward households, family offices, and 2 to 10 person teams sharing operational agents through chat interfaces
Target Market
Personal and small-team AI assistant platforms
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