Fixes
Fix common Cursor, Claude Code, MCP, Vercel and Supabase problems with checklists and safe debugging prompts.
PayPal Webhook Not Receiving Events — Fix Guide
Debug sandbox configuration, local tunnels, event subscriptions, and signature verification issues.
For: PayPal / Webhooks / Next.js
Includes: checklist, fixes, safe prompts
Cursor Not Following Rules — How to Fix
Checklist to make sure your Cursor rules are loaded, specific, and applied to the right workspace root.
For: Cursor / Rules / Debugging
Includes: checklist, fixes, safe prompts
PDF Upload Fails in Next.js — Common Fixes
Debug file size limits, MIME validation, server actions, and storage integration for PDF uploads.
For: PDF / Uploads / Next.js
Includes: checklist, fixes, safe prompts
Supabase Storage Upload Not Working — Fix Guide
Fix storage bucket policies, signed upload paths, auth state, and object permission issues.
For: Supabase / Storage / Uploads
Includes: checklist, fixes, safe prompts
Cursor Keeps Changing Unrelated Files — How to Fix
Reduce scope creep in AI edits with clearer boundaries, smaller prompts, and safer review steps.
For: Cursor / Rules / Safety
Includes: checklist, fixes, safe prompts
Next.js Environment Variables Not Working on Vercel
Review env naming, build-time vs runtime usage, and deployment configuration mistakes on Vercel.
For: Next.js / Vercel / Environment Variables
Includes: checklist, fixes, safe prompts
Supabase Auth Redirect Not Working — Fix Guide
Fix callback URLs, cookies, site URL mismatches, and redirect handling in Next.js auth flows.
For: Supabase / Auth / Next.js
Includes: checklist, fixes, safe prompts
Vercel Build Failed in Next.js — Fix Checklist
Step-by-step checks for common build failures, env mismatches, and deployment regressions on Vercel.
For: Vercel / Next.js / Build
Includes: checklist, fixes, safe prompts
CORS Error in Next.js API Routes — Fix Guide
Resolve origin mismatches, missing headers, local tunnel edge cases, and browser preflight failures.
For: CORS / Next.js / API
Includes: checklist, fixes, safe prompts
MCP Server Not Connecting — Common Fixes
Fix MCP permissions, auth, config, path, and startup issues before changing application code.
For: MCP / Debugging / Config
Includes: checklist, fixes, safe prompts