The ProdFix Blog

Production guides for solo founders, vibe coders, and indie hackers. Ship faster. Break less.

✓ ✓ CSP headers script-src configured ✓ Auth tokens httpOnly cookies ✗ Rate limiting missing on /api/login ✓ HTTPS enforced HSTS + redirect ✗ SQL injection raw query at /search ✓ Input validation all endpoints prodfix · vibe coding safely · security monitoring
Guide
JavaScript Security Audit Guide: How to Review Your Own Code
A self-service security audit guide for JavaScript developers who don't have a security team.
2025-04-21 · 6 min read
prodfix ● All Projects ○ Issues ○ Performance ○ Security ○ UX All Projects 98.7% uptime this month 3 open issues 1.4s avg LCP ● main-saas 142 errors · 23 open · LCP 1.8s critical ● side-project-2 8 errors · 1 open · LCP 2.1s warn ● chrome-ext 0 errors · all clear · LCP 0.9s good
Guide
SaaS Technical Architecture Patterns for Solo Founders
The architecture patterns that work for solo founder SaaS at different scales.
2025-04-21 · 7 min read
Error rate over time last 30 days · errors per 1000 sessions ↑ deploy without monitoring ↓ ProdFix installed errors caught fast — actual - - trend · prodfix.com
Guide
Web Application Performance Guide 2025: The Complete Optimization Playbook
The complete web performance optimization playbook for 2025. Every technique ranked by ROI.
2025-04-22 · 8 min read
prodfix ● All Projects ○ Issues ○ Performance ○ Security ○ UX All Projects 98.7% uptime this month 3 open issues 1.4s avg LCP ● main-saas 142 errors · 23 open · LCP 1.8s critical ● side-project-2 8 errors · 1 open · LCP 2.1s warn ● chrome-ext 0 errors · all clear · LCP 0.9s good
Guide
The Complete SaaS Monitoring Stack Guide 2025
What to monitor, how to monitor it, and which tools to use for a complete SaaS monitoring stack in 2025.
2025-04-22 · 7 min read
error_dashboard.tsx ● TypeError Cannot read properties of undefined · 142 events · 23 users ● UnhandledRejection Payment API timeout · 31 events · 8 users ● ReferenceError user is not defined · 18 events · 12 users ✓ 3 fixed this week via MCP + Cursor · avg fix time: 4 min ERROR RATE / 24H — before - - after fix
Vibe Coding
Vibe Coding React Hooks: Patterns AI Gets Wrong Every Time
React hooks patterns that AI generates incorrectly. What to check before shipping AI-written hook code.
2025-04-25 · 5 min read
✦ Claude Code ProdFix Cursor IDE Production MCP · Model Context Protocol · AI-powered debugging
Vibe Coding
Cursor Agent Mode in Production: What to Enable and What to Avoid
Cursor Agent Mode runs autonomously. Here's how to use it safely without breaking production.
2025-04-25 · 5 min read
Error rate over time last 30 days · errors per 1000 sessions ↑ deploy without monitoring ↓ ProdFix installed errors caught fast — actual - - trend · prodfix.com
Vibe Coding
Measuring AI Code Quality: What Metrics Actually Matter
How do you know if AI-generated code is production quality? Here's the metrics that tell you.
2025-04-25 · 5 min read
error_dashboard.tsx ● TypeError Cannot read properties of undefined · 142 events · 23 users ● UnhandledRejection Payment API timeout · 31 events · 8 users ● ReferenceError user is not defined · 18 events · 12 users ✓ 3 fixed this week via MCP + Cursor · avg fix time: 4 min ERROR RATE / 24H — before - - after fix
Vibe Coding
Vibe Coding State Management: What AI Gets Wrong About Redux and Zustand
State management bugs from AI-generated code are subtle and hard to debug. Here's what to check.
2025-04-25 · 5 min read
⚠ CSP Violation script-src blocked · 3 events ⚠ XSS Attempt Blocked · /api/search ✓ Auth headers OK HSTS + SameSite set Security Score B+ VULNERABILITIES 2 critical 3 medium 12 passed prodfix · security monitoring · CSP · XSS · supply chain
Vibe Coding
AI-Generated API Routes: The Security Holes You Need to Find
Every AI-generated API route needs a security review. Here's the checklist.
2025-04-26 · 5 min read
prodfix — terminal ❯ npx @prodfix/sdk init ✓ SDK initialized — 3 projects, 0 errors ❯ prodfix issues --project my-saas ● TypeError: Cannot read properties of undefined at Checkout.jsx:47 · 23 users affected · 142 events ● UnhandledRejection: Payment API timeout at api/checkout.js:89 · 8 users affected · 31 events ❯ _
Vibe Coding
Claude Code Slash Commands That Speed Up Production Debugging
These Claude Code slash commands accelerate your production debugging workflow.
2025-04-26 · 4 min read
⚠ New Error Detected TypeError: Cannot read properties of undefined Checkout.jsx:47 · 5 users · 2 min ago View in IDE → Dismiss Alert via 📧 Email · Slack within 60 seconds Fix via Cursor + MCP avg 4 min to fix
Vibe Coding
Vibe Coding Payment Integrations: What Always Goes Wrong
Payment integrations written by AI miss edge cases that cost you money. Here's what to fix.
2025-04-26 · 5 min read
⚠ CSP Violation script-src blocked · 3 events ⚠ XSS Attempt Blocked · /api/search ✓ Auth headers OK HSTS + SameSite set Security Score B+ VULNERABILITIES 2 critical 3 medium 12 passed prodfix · security monitoring · CSP · XSS · supply chain
Vibe Coding
AI Coding and Environment Variables: The Security Gap
AI frequently mishandles environment variables. Here's the patterns to watch for and fix.
2025-04-26 · 4 min read
error_dashboard.tsx ● TypeError Cannot read properties of undefined · 142 events · 23 users ● UnhandledRejection Payment API timeout · 31 events · 8 users ● ReferenceError user is not defined · 18 events · 12 users ✓ 3 fixed this week via MCP + Cursor · avg fix time: 4 min ERROR RATE / 24H — before - - after fix
Vibe Coding
Vibe Coding WebSockets: Production Pitfalls AI Misses
WebSocket code from AI looks clean but fails under real connection conditions. Here's what breaks.
2025-04-27 · 5 min read
✦ Claude Code ProdFix Cursor IDE Production MCP · Model Context Protocol · AI-powered debugging
Vibe Coding
How to Write Better Prompts for Safer Production Code
The prompting techniques that get AI to write code that's actually safe for production.
2025-04-27 · 5 min read
✓ ✓ CSP headers script-src configured ✓ Auth tokens httpOnly cookies ✗ Rate limiting missing on /api/login ✓ HTTPS enforced HSTS + redirect ✗ SQL injection raw query at /search ✓ Input validation all endpoints prodfix · vibe coding safely · security monitoring
Vibe Coding
Vibe Coding File Uploads: Security and Error Handling AI Misses
File upload code from AI is often insecure and fragile. Here's the complete production checklist.
2025-04-27 · 5 min read
error_dashboard.tsx ● TypeError Cannot read properties of undefined · 142 events · 23 users ● UnhandledRejection Payment API timeout · 31 events · 8 users ● ReferenceError user is not defined · 18 events · 12 users ✓ 3 fixed this week via MCP + Cursor · avg fix time: 4 min ERROR RATE / 24H — before - - after fix
Vibe Coding
Infinite Loops in AI-Generated Code: How to Spot Them Before Deploy
AI occasionally generates code with infinite loops or runaway recursion. Here's how to catch them.
2025-04-27 · 4 min read
⚠ New Error Detected TypeError: Cannot read properties of undefined Checkout.jsx:47 · 5 users · 2 min ago View in IDE → Dismiss Alert via 📧 Email · Slack within 60 seconds Fix via Cursor + MCP avg 4 min to fix
Vibe Coding
Vibe Coding Cron Jobs: What Breaks When No One Is Watching
Cron jobs fail silently. AI-written cron jobs fail in specific ways. Here's how to monitor them.
2025-04-28 · 5 min read
Cursor IDE Claude Code CLI MCP Model Context Protocol ProdFix Error Data Production App AI tools read production data in real-time via MCP
Vibe Coding
MCP Protocol Deep Dive: How It Works Under the Hood
A technical deep dive into how MCP works — for developers who want to understand the protocol.
2025-04-28 · 6 min read
error_dashboard.tsx ● TypeError Cannot read properties of undefined · 142 events · 23 users ● UnhandledRejection Payment API timeout · 31 events · 8 users ● ReferenceError user is not defined · 18 events · 12 users ✓ 3 fixed this week via MCP + Cursor · avg fix time: 4 min ERROR RATE / 24H — before - - after fix
Vibe Coding
Date and Time Bugs in AI-Generated Code: A Production Horror Story
Timezone bugs from AI-generated code are among the hardest to debug. Here's how to prevent them.
2025-04-28 · 5 min read
⚠ New Error Detected TypeError: Cannot read properties of undefined Checkout.jsx:47 · 5 users · 2 min ago View in IDE → Dismiss Alert via 📧 Email · Slack within 60 seconds Fix via Cursor + MCP avg 4 min to fix
Vibe Coding
Vibe Coding Email Flows: What AI Gets Wrong About Transactional Email
Email sending code from AI misses retry logic, bounce handling, and rate limits. Here's the fix.
2025-04-28 · 5 min read
error_dashboard.tsx ● TypeError Cannot read properties of undefined · 142 events · 23 users ● UnhandledRejection Payment API timeout · 31 events · 8 users ● ReferenceError user is not defined · 18 events · 12 users ✓ 3 fixed this week via MCP + Cursor · avg fix time: 4 min ERROR RATE / 24H — before - - after fix
Vibe Coding
Search Implementation with AI: Production Edge Cases to Handle
Search features built with AI miss edge cases. Here's what to test before you ship.
2025-04-29 · 5 min read
error_dashboard.tsx ● TypeError Cannot read properties of undefined · 142 events · 23 users ● UnhandledRejection Payment API timeout · 31 events · 8 users ● ReferenceError user is not defined · 18 events · 12 users ✓ 3 fixed this week via MCP + Cursor · avg fix time: 4 min ERROR RATE / 24H — before - - after fix
Vibe Coding
Vibe Coding Pagination: Why It Always Breaks at Page 3
Pagination from AI works for page 1 and 2. Here's why it breaks at scale and how to fix it.
2025-04-29 · 4 min read
PRE-LAUNCH CHECKLIST ✓ Error monitoring ✓ Alerts configured ✓ Performance tracking → Security scan MCP setup Rate limiting PROGRESS 4 / 6 items completed ⚠ NEXT UP Run security scan CSP + XSS audit Start scan →
Vibe Coding
Testing AI-Generated Code: Strategies That Actually Catch Bugs
Standard testing strategies miss AI-specific bugs. Here's the testing approach for vibe-coded apps.
2025-04-29 · 5 min read
⚠ New Error Detected TypeError: Cannot read properties of undefined Checkout.jsx:47 · 5 users · 2 min ago View in IDE → Dismiss Alert via 📧 Email · Slack within 60 seconds Fix via Cursor + MCP avg 4 min to fix
Vibe Coding
Vibe Coding Notification Systems: What Breaks in Production
Notification systems from AI have race conditions and duplicate send issues. Here's what to fix.
2025-04-29 · 5 min read
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