Tool: Gemini Schema Validator

[lovestaco]

Gemini Schema Validator

This issue is reserved for first-time contributors. If you’ve never made a pull request to open source before, this one’s for you! Don’t worry if it feels tricky — I’ll guide you through the process step by step. 🌟

Problem Statement

Validating Gemini JSON schemas inside AI Studio is currently painful. Errors are hard to detect, and developers struggle to quickly identify where their schema is invalid.

We need a simple tool to accept a Gemini schema and check for errors, with clear feedback pointing out what’s wrong.

Proposed Solution

Create a Gemini Schema Validator that can:

• ✅ Accept Gemini JSON schema as input.
• ✅ Check validity against expected structure.
• ✅ Pinpoint exact errors (missing fields, type mismatches, malformed JSON, etc.).
• ✅ Provide actionable error messages for quick debugging.

Open Source Reference

(No strong open-source reference yet — this would be a fresh, useful contribution.)

Screenshots

• AI Studio Schema Editor Example

Article Ideas

Supporting educational content could include:

• How Gemini schemas work.
• Structured output with Gemini.
• Common pitfalls when writing schemas.

Implementation

Date: 27-08-2025

External Links / References

• Structured output with Gemini models
• ChatGPT Example Discussion

Notes

This design was done without a design.md.

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I'm happy to hold your hand through this if you need help. Catch me on discord.
https://hexmos.com/freedevtools/

[Oma3r3]

I have a question. The ChatGPT example discussion that you have provided has given you a solution for your issue, did it not work?

[Oma3r3]

A recursive solution to match output data structure to the defined schema can be written, can you assign this issue to me please so I can work on it?

[lovestaco]

I have a question. The ChatGPT example discussion that you have provided has given you a solution for your issue, did it not work?

Yes, the ChatGPT example was sort of working in a bare-metal project, but we still needed to integrate it properly into the Free DevTools Astro project.

A recursive solution to match output data structure to the defined schema can be written, can you assign this issue to me please so I can work on it?

Yes, we can go ahead with that. You can refer to the CONTRIBUTING.md for further instructions.

Also, we have a Discord channel you can join if you need any kind of inputs — the community is very friendly and helpful.

[anghaajay1608]

@lovestaco Hey! Please assign this issue to me if its still open.