Omnigent: open-source meta-harness coordinating Claude Code and Codex agents

Databricks' new open-source meta-harness, Omnigent, lets multiple coding agents such as Claude Code and Codex share sessions, rules, and security policies in one system. A walkthrough by @leonvz demonstrates forking work across agents, multi-agent review and debate with Debby, and splitting implementation across subagents with Polly.