Sentinel-IR 0.5: an X-ray for code, now with a Rust filter

A 2-minute read. No programming needed. Mild sarcasm included at no extra cost.

The problem, in one picture

When you ask an AI assistant "is this code safe?", most tools paste the whole file into the chat. That's like asking your doctor about a sore knee and handing over every selfie you've ever taken.

Technically it's all you. Mostly it's noise, and you get billed for the noise, because AI is paid by the word.

Sentinel-IR hands over the X-ray instead. It reads a source file and writes a short note: what the code touches (files, the internet, passwords, other programs), how risky that is (low, medium, high, critical) and the exact line where it does it.

A 40,000-character file becomes a note of about 450 characters. The AI reads the note, and you pay for the note.

What's new in 0.5

1. It reads Rust now. Rust is the language people pick when they want software that doesn't crash, which is why it ends up in browsers, operating systems and crypto wallets. Sentinel-IR already spoke JavaScript, TypeScript and Python. Rust is number four, and it isn't a beginner's phrasebook: we ran it on more than 18,000 real Rust files, including Rust's own standard library, and every one of them was read completely.
2. It watches the build, not just the program. Rust has a sneaky feature: some code runs while the program is being built, on the developer's laptop, before anyone has pressed "run". Think of a flat-pack wardrobe that rearranges your living room while you're still reading the instructions. Sentinel-IR now marks that kind of code as at least high risk when it touches files, the internet or secrets.
3. It's harder to fool. A tiny comment wedged into the middle of a line used to be enough to hide a dangerous call. Now it isn't. A file built to make the analyzer think forever gets 5 seconds and then a stamp saying "this one didn't finish, don't trust the low score".
4. It's faster and lighter. The same 35,000 real files now take 151 seconds instead of 210, and a large Rust file needs about 40% less memory. Your laptop fan says thanks.

What it doesn't do

It doesn't run your code, doesn't upload it anywhere, and doesn't pretend to be a security guard. "Low risk" means "nothing scary found", not "certified safe". It's a smoke detector, not the fire brigade.

Try it

Open the playground, paste some code (or open a file from your phone) and see exactly what an AI agent would get. Everything runs inside your browser and nothing is uploaded.

Free and open source (Apache-2.0): GitLab · npm