ThinkRail, a JetBrains-backed GUI for Pi coding agent, bets on spec-driven development

makingthematrix · reddit · 2026-09-15

ThinkRail is an open-source, free GUI for the Pi coding agent, backed by JetBrains. A team member wrote a short post explaining one of its core concepts: Spec-Driven Development, an old idea seeing renewed popularity because it fits how software is built in the AI era. The post links to a longer article on the topic, plus the GitHub repo and install instructions.

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