About StableStack
Every floor you add depends on the one below it
AI can write code faster than any human. But speed without structural integrity is how buildings collapse.
The problem we saw
Teams are shipping faster than ever. AI assistants generate entire features in minutes. The first few floors go up effortlessly — a login page here, an API there, a dashboard on top.
Then something breaks. A background task silently loses its database session. A dictionary iteration that worked fine in testing produces different results in production. A webhook handler skips signature verification because the AI thought it was optional.
These aren't syntax errors. They're structural problems — the kind that don't show up until you're five stories high and the foundation shifts.
What we believe
Stability is a feature
Your product shouldn't fall over when you add the tenth feature on top of the first nine. Every layer of code should bear the weight of what comes next.
Security isn't optional
AI assistants routinely generate code with hardcoded secrets, missing input validation, and broken auth flows. These are real vulnerabilities, not theoretical ones.
Determinism matters
Code that produces different results on different runs is code that will betray you in production. We catch the nondeterminism that AI-generated code quietly introduces.
Speed and quality aren't tradeoffs
You shouldn't have to choose between shipping fast and shipping safely. StableStack runs in seconds, catches what humans miss, and stays out of your way.
How we built it
StableStack is a static analysis tool purpose-built for the patterns AI assistants get wrong. Not another generic linter — every one of our 105 checks exists because we found real AI-generated code in production with that exact bug.
It runs entirely on your machine. Your code never leaves your environment. There's no telemetry during analysis, no cloud processing, no phone-home. Install it, run it, trust the results.
We support Python, JavaScript, and TypeScript — the languages where AI-assisted development is most common and where these subtle bugs are hardest to catch by eye.
Build higher. Build safer.
Free tier includes 9 critical security checks. No signup required.
pip install stablestack