Show HN: Conduct, open-source guardrails for LLM and MCP tool calls

Conduct provides an open-source control plane that enforces policy-first guardrails on every LLM, shell-tool, and MCP call, generating signed, hash-chained audit logs verifiable with a single click. It ships in minutes, supports self-hosting via Docker or Kubernetes, includes 15 compliance packs and 39 pre-built playbooks, and offers a free Discovery mode for read-only visibility before policies are applied.