ThinkRail
ThinkRail is an open-source agent IDE built on the Pi coding agent. It adopts a specification-driven development model, in which specifications guide the agent's work. It supports parallel workspaces and is available in both web and desktop forms.
Timeline (last 90 days)
JetBrains has open-sourced an agent IDE called ThinkRail on GitHub under the Apache 2.0 license.
ThinkRail offers a one-line script installation method.
ThinkRail itself has no account system, and model credentials are managed by users themselves.
ThinkRail supports connecting to JetBrains AI and also allows users to connect their own model providers.
ThinkRail can read existing agent skills files without reconfiguration.
ThinkRail introduces the concept of "Living specs": a graph of specification files maintained alongside the code, which the agent both reads and maintains.
ThinkRail uses a separate Git work tree and branch for each AI coding task, with agents running on their own branches without touching the developer's current checkout.
ThinkRail is a development environment built from scratch on top of the Pi coding agent.
ThinkRail has received about 5,200 GitHub stars and has made the trending list.
ThinkRail is an open-source agent IDE, completely free with no paid plans, open-sourced under the Apache 2.0 license, with code hosted on GitHub.
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All Facts (20)
ThinkRail has received about 5,200 GitHub stars and has made the trending list.
50%UnverifiedThinkRail offers a one-line script installation method.
50%UnverifiedThinkRail itself has no account system, and model credentials are managed by users themselves.
50%UnverifiedThinkRail supports connecting to JetBrains AI and also allows users to connect their own model providers.
50%UnverifiedThinkRail can read existing agent skills files without reconfiguration.
50%UnverifiedThinkRail introduces the concept of "Living specs": a graph of specification files maintained alongside the code, which the agent both reads and maintains.
50%UnverifiedThinkRail uses a separate Git work tree and branch for each AI coding task, with agents running on their own branches without touching the developer's current checkout.
50%UnverifiedThinkRail is a development environment built from scratch on top of the Pi coding agent.
50%UnverifiedThinkRail is an open-source agent IDE, completely free with no paid plans, open-sourced under the Apache 2.0 license, with code hosted on GitHub.
50%UnverifiedThinkRail's configuration is fully integrated with Pi: if a user is already using Pi, the API keys, model configuration, permission settings, and skills will all be automatically recognized and carried over directly.
50%UnverifiedThinkRail inherits permission control by modifying Pi's permissions configuration file, which can require the agent to request approval before modifying files.
50%UnverifiedThinkRail supports spec-driven development; spec files are in Markdown format and establish nested relationships through metadata fields (id, type, title, status, parent), and the spec tree is built into the sidebar and injected into the system prompt.
50%UnverifiedThinkRail's review feature allows users to mark code as a 'problem', record pending items, and later jump to the corresponding location or mark it as resolved; the agent will also try to fix the marked problems.
50%UnverifiedThinkRail's interface uses the JetBrains Mono font, with a minimalist and compact style.
50%UnverifiedThinkRail is a new project launched by JetBrains.
50%UnverifiedCurrently there is a lack of official detailed documentation and user feedback about ThinkRail.
50%UnverifiedThinkRail has a built-in system prompt, so users do not need to write an additional agent.md pointing to spec files; the agent inherently knows which content to read.
50%UnverifiedSpec-driven development requires first clearly defining the software's goals, capability boundaries, architecture decisions, and front-end specs in Markdown files, and then having the agent implement based on these files.
50%UnverifiedThinkRail directly inherits the existing Pi configuration, API keys, permission settings, and skills.
50%UnverifiedThinkRail is offered in two forms: a Web UI and a desktop client.
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