Build a Least-Privilege Agent Sandbox Workflow with OS Isolation
Hazmat (open-source, ~Aug 17 2026) runs AI coding agents in a dedicated least-privilege OS account so they cannot read SSH keys or cloud credentials, backed by a TLA+ formal spec, per-session macOS backups, and a session-scoped firewall. This dispatch builds agentcell, a LangGraph workflow that plans a session with declared paths, generates a per-session sandbox policy, preflights a backup, spawns any harness (Claude Code, Codex, OpenCode, Cursor) inside the account, and terminates on the first escape attempt.