AI Added a Route That Bypasses Auth Middleware
AI registered a new endpoint outside the authenticated route group, exposing internal data without checks. Detect the gap and enforce auth as a default.
🐞 AI Coding Tool Issues
Cursor / Codex / Claude Code — apply failures, indexing, wrong file edits, rollback.
AI coding tools fail two ways: "it broke my code" and "it never read the whole project." This hub groups those by tool — Cursor, Codex, Claude Code — and adds rollback / recovery / guardrails.
Common problems
- Cursor cannot apply edits Composer vs Inline, file locks, extension conflicts.
- Cursor stuck indexing node_modules, build artifacts, ignore-list tuning.
- Cursor missed the full project context Codebase index, @Files, symbol refs — three explicit injects.
- Codex output does not fit the project Constrain style with AGENTS.md and explicit file refs.
- Rolling back AI code changes safely git stash / restore / reflog — covers 99% of cases.
- Recovering an old file version after commit git log -p, checkout <sha> -- <file>, reflog — three paths.
- AI-generated tests pass but feature broken Hand-write one e2e test; audit mocks; strengthen assertions.
- AI suggested a stale dependency Run `npm view <pkg> time` before installing anything.
In-depth articles in this hub
AI Invented a Wrong API Signature That Does Not Exist
AI confidently calls a method that does not exist — wrong arg order, made-up option name, fabricated return type. Diagnose by pinning to real source.
AI Generated Migration Works on Dev, Fails on Prod Schema
AI-written migration runs clean on an empty dev DB but blows up on prod with constraint or data errors. Fix with dev-prod parity and safety checks.
AI-Generated SQL Locks a Hot Table for Minutes
AI wrote a query or update that holds long locks on a production table, blocking reads and writes. Identify the pattern and rewrite it to be lock-friendly.
AI Keeps Using Deprecated Syntax Despite Lint Errors
AI generates code with deprecated APIs, fixes one lint error, then re-introduces the same pattern in the next file. Pin the rule and ground the prompt.
AI Uses npm Commands in a pnpm or Yarn Project
AI runs npm install and creates package-lock.json in a pnpm-only repo, breaking the lockfile invariant. Pin the manager and lock the rules.
AI Agent Loops Without Making Progress
Agent keeps trying the same fix or oscillates between two states. Break the loop fast.
Build Passes Locally but Fails After AI Edit in CI
Classic case: AI added a dep without committing the lockfile, or relied on a local Node version.
AI Code Edits Broke the Build — Recovery + Diagnosis
After an AI run, npm run build fails. Diagnose with diff review, type-checking, and selective revert.
AI Agent Overwrote .env / Environment Variables
Agent rewrote .env with placeholders or removed entries — recover and prevent.
AI Hallucinated a File That Doesn't Exist
Agent imports `src/utils/superhelper.ts` that was never created — common, fixable.
Merge Conflict After AI Edits — Resolution Guide
Your branch + AI edits conflict with main. Resolve without losing AI improvements.
AI Edits Broke package-lock / pnpm-lock Conflicts
Agent ran an install or removed deps and now your lockfile is at war with the team's.
AI Refactor Created Duplicate Files
Agent created `UserList2.tsx` next to the original or scattered duplicates. How to clean up safely.
AI Removed Working Logic During Refactor
AI "simplified" code and quietly removed a branch your users actually rely on.
AI Generated TypeScript Errors
AI produces code that doesn't type-check — usually wrong types, any-casts, or missing generic parameters.
How to Help Claude Code Understand Your Project: 7 Methods That Actually Work
Claude Code editing the wrong files, duplicating existing functions, missing key files? It's almost never the model — it's missing project context. Seven ways to make Claude Code actually read your codebase.
Cursor Keeps Reading the Wrong Files
Cursor pulls in old / vendored / generated files into context. Fix the index and ignore lists.
How to Inspect AI-Generated Diffs Before Accepting
A 200-line AI diff isn't safe just because it compiles. Read it in the right order.
Multiple AI Agents Created Conflicts
Two agents (Cursor + Claude Code) edited the same file. Merge cleanly, don't panic.