AI Added a Route That Bypasses Auth Middleware
AI registered an endpoint outside the authenticated route group, leaking internal data. The fastest fix: move the route under the authed router and enforce auth at the data layer, not in middleware.
🐞 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 calls a method that does not exist: wrong arg order, made-up option name, fabricated return type. Diagnose against the real .d.ts and ground future answers in current docs.
AI Migration Works on Dev, Fails on Prod Schema: The Fix
An AI-written migration runs clean on an empty dev DB but blows up on prod with constraint, lock, or NULL errors. Fix it with prod-clone testing and safe SQL patterns.
AI-Generated SQL Locks a Hot Table for Minutes
AI wrote an UPDATE or DELETE that holds long locks on a production Postgres table and blocks reads and writes. Cancel it, then rewrite it into lock-friendly batches.
AI Keeps Using Deprecated Syntax Despite Lint Errors
AI generates code with deprecated APIs, fixes one lint error, then re-introduces it in the next file. Pin the ban in .cursor/rules and make ESLint a hard CI error.
AI Runs npm in a pnpm or Yarn Project (Lockfile Fix)
AI runs npm install and drops package-lock.json into a pnpm-only repo, breaking the lockfile invariant. Pin the manager with devEngines/corepack and a preinstall guard.
AI Coding Agent Loops Without Making Progress
Your agent keeps trying the same fix or oscillates between two states. How to spot the loop in 30 seconds and kill it with one prompt.
Build Passes Locally but Fails in CI After an AI Edit
AI added a dependency without committing the lockfile, or used a Node feature your CI image doesn't have. Reproduce it in 5 minutes and pin the gap shut.
AI Code Edits Broke the Build: Recovery + Diagnosis
After an AI run, npm run build fails. Locate the bad change in 10 minutes with diff triage, tsc --noEmit, and targeted git restore — no full reset.
AI Agent Overwrote .env / Environment Variables
An AI coding agent rewrote .env with placeholders or deleted it. Recover the real values, then hard-lock the file so it never happens again.
AI Hallucinated a File or Package That Doesn't Exist
Agent imports `src/utils/superhelper.ts` or a package that was never created. Find every bad import, then fix or replace it.
Merge Conflict After AI Edits: Resolution Guide
Your branch plus AI edits conflict with main. Resolve it without losing the AI's real improvements, and stop mistaking format noise for logic conflicts.
AI Edits Broke package-lock / pnpm-lock — Fix the Conflict
An agent ran an install or removed deps and now your lockfile is at war with the team's. Throw it away and regenerate — here's the exact path per package manager.
AI Refactor Created Duplicate Files: Safe Cleanup
Your agent wrote `UserList2.tsx` next to the original instead of editing in place. Diff, merge, delete, and fix imports without breaking the build.
AI Removed Working Logic During Refactor: Find It and Restore It
An AI agent "simplified" your code and quietly deleted a branch real users depend on. Bisect to the commit, cross-check prod logs, restore just the deleted hunks, and add a regression test.
Fix AI-Generated TypeScript Type Errors
AI code won't type-check (TS2322, TS2339, TS2554)? The exact tsc loop, error-code table, and agent rules that fix it in one pass.
Claude Code Doesn't Understand Your Project: 7 Fixes That Actually Work
Claude Code editing the wrong files, duplicating functions that exist, or missing key code? It's almost never the model — it's missing project context. Seven concrete ways to make Claude Code read your repo, verified for June 2026.
Cursor Keeps Reading the Wrong Files
Cursor pulls old, vendored, or generated files into context and produces wrong patches. Fix the index, .cursorignore, and prompt pinning.
How to Inspect AI-Generated Diffs Before Accepting
A 200-line Claude Code or Cursor diff isn't safe just because it compiles. Read it deletions-first, in the right order.
Two AI Agents Edited the Same File: Clean Merge
Cursor and Claude Code clobbered the same file. Stop both, recover each intent, merge by hunk, and isolate agents with worktrees so it never repeats.