🔐 Vibecoding Prompts: Instantly Fix 401 Errors. An Automated Debug Loop That Runs 30+ Checks and Finds Root Cause

If you’ve been banging your head against stubborn 401s, this looped prompt will save you hours of guesswork.

About This Prompt

This is the exact prompt I used when I got stuck with Google OAuth errors.

This prompt is an automated 401-investigation loop that avoids past fixes, iteratively tests a broad checklist of auth failures (JWT validity/claims, headers, audience, CSRF, middleware, env mismatches, rate limits, etc.), and logs each attempt with suspected cause.

It decodes and inspects the token, performs a real /api/verify-subscriber call, then repeats until at least 30 checks have been exercised, three fixes are verified, and a clear root cause report is produced with structured notes for debugging and regression prevention.

The prompt is in JSON format — which means the content is structured as key–value pairs that machines and coding agents can read directly (no extra cleanup needed).

You don’t need to rewrite or reformat anything: simply copy and paste this block as-is into your AI coding agent, and it will understand the schema, properties, and instructions automatically.

The Prompt

Copy the entire prompt and paste as-is into your AI coding agent: