OpenCode Review: The Open-Source AI Coding Agent That Took #1 on Hacker News

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When an open-source project hits 1,099 points and 546 comments on Hacker News in a single day, it is not a fluke. It is a signal that the developer community has been waiting for exactly this. OpenCode - the open-source AI coding agent built by Anomaly - crossed that threshold on March 20, 2026, becoming the post on Hacker News. With 120,000 GitHub stars, 800 contributors, and over 5M monthly developers, OpenCode has quietly become the most popular open-source alternative to Claude Code and Codex.