This content originally appeared on DEV Community and was authored by Just Clive
The Problem Every Developer Knows Too Well
You've been there. It's 2 AM, and you're staring at a wall of ESLint errors. Missing key props in React lists. Hydration mismatches because someone used localStorage without a server-side guard. Accessibility warnings everywhere.
ESLint tells you what's wrong. But you still have to fix it yourself.
The cost? Hours of manual fixes. Delayed releases. Production bugs that could have been prevented.
What if there was a tool that didn't just identify problems, but actually fixed them?
Introducing NeuroLint
NeuroLint is a deterministic code transformation engine that automatically fixes over 50 common issues in React, Next.js, and TypeScript projects.
The key difference? No AI. No guessing. No hallucinations.
While AI coding tools can produce unpredictable results, NeuroLint uses Abstract Syntax Tree (AST) parsing and rule-based transformations. Same input, same output, every time.
# Install globally
npm install -g @neurolint/cli
# Analyze your project
neurolint analyze . --verbose
# Preview fixes (safe, no changes)
neurolint fix . --all-layers --dry-run
# Apply fixes
neurolint fix . --all-layers
The 5-Step Fail-Safe
Every transformation goes through a 5-step validation process:
- AST-First Transformation — Parses code into an Abstract Syntax Tree
- First Validation — Checks if the transformation is syntactically correct
- Regex Fallback — Falls back to regex if AST parsing fails
- Second Validation — Re-validates the result
- Accept Only If Valid — Changes only applied if they pass. Otherwise, automatic revert.
This is why NeuroLint never breaks your code.
7-Layer Progressive Architecture
| Layer | What It Fixes |
|---|---|
| 1. Configuration | Modernizes tsconfig.json, next.config.js, package.json |
| 2. Patterns | Removes console.log, fixes HTML entities, cleans unused imports |
| 3. Components | Adds React keys, accessibility attributes, button types |
| 4. Hydration | Adds SSR guards for localStorage, window, document |
| 5. Next.js | Adds 'use client' directives, optimizes Server Components |
| 6. Testing | Generates error boundaries and test scaffolding |
| 7. Adaptive | Learns patterns from previous fixes and reapplies them |
10 Concrete Fixes
Here's exactly what NeuroLint does:
-
Missing React keys — Adds unique
keyprops to.map()lists -
Hydration guards — Wraps
localStorage,window,documentin SSR checks -
Button types — Adds
type="button"to prevent form submissions -
Accessibility — Adds
aria-labelto buttons,altto images - 'use client' — Adds missing directives to client components
- Console.log removal — Strips debug statements
-
HTML entities — Converts
&to&,<to< - Unused imports — Removes dead imports
- var → const/let — Modernizes variable declarations
- forwardRef removal — Migrates deprecated React 19 patterns
Real-World Example
Before:
function Button({ children, onClick }) {
return <button onClick={onClick}>{children}</button>;
}
After Layer 3 (Components):
function Button({ children, onClick }) {
return (
<button
onClick={onClick}
aria-label={typeof children === 'string' ? children : undefined}
type="button"
>
{children}
</button>
);
}
After Layer 5 (Next.js):
'use client';
interface ButtonProps {
children: React.ReactNode;
onClick?: () => void;
}
function Button({ children, onClick }: ButtonProps) {
return (
<button
onClick={onClick}
aria-label={typeof children === 'string' ? children : undefined}
type="button"
>
{children}
</button>
);
}
export default Button;
Migration Tools
React 19 Migration
neurolint migrate-react19 . --verbose
Handles forwardRef removal, string refs → callback refs, ReactDOM.render → createRoot.
Dependency Compatibility
neurolint check-deps . --fix
Detects React 19 incompatibilities and auto-generates fixes.
Why Not AI?
| Feature | AI Tools | NeuroLint |
|---|---|---|
| Predictable output | Can hallucinate | Same input = same output |
| Auditable changes | Black box | Every change documented |
| Framework migrations | Manual prompting | One command |
| Backup system | None | Automatic timestamped backups |
Getting Started
# Install
npm install -g @neurolint/cli
# Analyze
neurolint analyze src/ --verbose
# Preview fixes (safe)
neurolint fix src/ --all-layers --dry-run
# Apply with backup
neurolint fix src/ --all-layers --backup
Open Source (Apache 2.0)
Free forever. Commercial use allowed. No restrictions.
GitHub: github.com/Alcatecablee/Neurolint-CLI
Try It Today
npm install -g @neurolint/cli
neurolint analyze . --verbose
Your future self will thank you.
Questions? Open an issue on GitHub or drop a comment below!
This content originally appeared on DEV Community and was authored by Just Clive
Just Clive | Sciencx (2025-12-02T00:48:54+00:00) Stop Fixing Code Manually: How NeuroLint Automates What ESLint Can’t. Retrieved from https://www.scien.cx/2025/12/02/stop-fixing-code-manually-how-neurolint-automates-what-eslint-cant/
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