Mind Rig

Mind Rig

Develop high-quality prompts without leaving your editor

joshpitzalis
@joshpitzalis
Published on Feb 16, 2026
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Details

Platforms
Desktop

About Mind Rig

A free VS Code extension that lets developers test prompts in their editor — without the overhead of formal evaluation tools and infrastructure. When I update a prompt, I need to verify that it works across a range of different inputs. Usually, that means tediously running the prompt again and again with different inputs, every time I make a change. Mind Rig me re-run a prompt against 10 different inputs and see all the results side-by-side in my code editor. Basically saves a fixed batch of test inputs so I can re-run the same data set each time I tweak the prompt. Also runs multiple models at once and compares speed/cost/quality outputs. Supports hundreds of models via Vercel Gateway. Also shows request/response JSONs + usage stats. - Free and open-source
 - Supports Ruby, PHP, Go, C# and Java in addition to JS/TS/Python.
 - Connect your Vercel AI Gateway API key to access 100s of model providers.
 - Most importantly, it matches your editor's colour theme 🎨
 - We also have a Discord community if you need any help getting set up.

Product Insights

This free, open-source VS Code extension enables developers to perform bulk prompt testing and model comparison directly within their local desktop editor environment. It bridges the gap between manual experimentation and complex evaluation infrastructure by providing side-by-side results for multiple inputs and models.

  • Supports side-by-side comparison of 100s of models via Vercel AI Gateway.
  • Enables batch testing by re-running saved input datasets against prompt iterations.
  • Provides deep technical visibility with request/response JSONs and usage statistics.
  • Offers broad language compatibility including Ruby, PHP, Go, C#, Java, and Python.

Ideal for: Frontend and backend developers needing a low-overhead way to verify prompt quality and cost across different models without leaving their VS Code environment.

Screenshots

Screenshot 1 of Mind Rig

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