The Verification Layer Missing From Every AI Coding Tool

Claude Code, Cursor, Copilot, Windsurf, Cline — every AI coding tool in the market has the same gap. The AI generates code. The code goes into your project. Nothing verifies that the code matches your actual dependencies, your actual functions, or your actual project structure.

What every tool does

Every AI coding tool follows the same pattern:

• You describe what you want
• The model generates code
• The code gets written to your project
• You hope it's right

Some tools are better at generation than others. Some have better context windows. Some are faster. But none of them verify the output against your project before or after writing it.

What's missing

This isn't a criticism of these tools. They're designed to generate code, not to verify it. Generation and verification are different problems that require different solutions.

Why the tools don't do this themselves

Verification against a project requires reading the project state: the dependency tree, the exported symbols, the file structure. It requires doing this on every write, in real time, without slowing down the developer. And it requires doing it deterministically — not with another AI model that might hallucinate the verification.

The AI coding tools are optimized for generation speed and quality. Adding a deterministic verification layer is a different engineering problem. That's what Check is.

How Check fills the gap

Check installs as a hook in your existing IDE. It doesn't replace your AI coding tool — it adds the missing verification layer on top of it.

After install, two things happen automatically:

• Before every command — Check validates the command before it reaches your shell
• After every file write — Check verifies imports and function calls against your actual project

No AI inside. Check reads your project state and compares. Deterministic. Same project, same output, same verdict.

Works with Claude Code, Cursor, and Antigravity today. More IDEs coming.