@DanKornas introduced preloop/preloop, an open-source self-hostable control plane for teams running AI agents with tool and model access. It routes tool calls through an MCP firewall and model traffic through a gateway with budgets, attribution, approvals, and session visibility, plus runtime timelines and event-driven flows. The repository had about 63 GitHub stars at verification and uses Apache-2.0.

Key Takeaways

  • ✓MCP firewall enforces allow, deny, approval, and justification policies before agents reach external tools.
  • ✓Model gateway adds budgets, allowed-model lists, token accounting, attribution, and a unified session timeline.
  • ✓Works with Claude Code, Codex CLI, Cursor, and other MCP-compatible clients; preloop/preloop had about 63 stars at verification under Apache-2.0.
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