Open-source AI IDE Proliferate launched for multi-agent coding

In the Show HN post, Pablo described how he started building Proliferate after his team onboarded to OpenAI Codex. He said that within days they were using it for everything, from computer use to coordinating other agents and setting up automations for recurring work. Pablo added that a Codex-like app with a beautiful UI represents the main interface companies will use to get work done, in line with OpenAI's mission to make Codex an everything app. However, as automation moved closer to the core of business, he wanted to work with agents from all labs, including open-weight models, without becoming increasingly dependent on OpenAI.

According to the post, Proliferate currently supports Claude Code, Codex, OpenCode, Cursor, and Grok with their native inference and configuration options, including Bedrock, Azure, and self-hosted inference. It also enables inter-agent communication and management, allowing a parent agent to spawn and communicate with a supported agent as a subagent. Pablo noted that he personally likes to have Fable delegate to Codex, with OpenCode models reviewing pull requests. In addition, Proliferate supports building workflows, which are reusable chains of agent sessions and human approval gates, with the harness and model chosen per step and documents passed between them. He uses this to automate code review, QA, and his PR construction process.

Pablo acknowledged that there are still rough spots but said the team is building fast and would appreciate feedback. At the time of reporting, the Hacker News submission had 11 points and 3 comments.