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2026

Pyrefly v1.0 is here!
Right Types, Wrong Code: Surprising Bugs A Type Checker Catches
Adding Pyrefly Type Checking to Your Agentic Loop
Python Type Checker Comparison: Speed and Memory Usage
How to Support Notebooks in a Language Server
Reaching 100% Type Coverage by Deleting Unannotated Code
Lessons from Pyre that Shaped Pyrefly
Python Type Checker Comparison: Typing Spec Conformance
pandas' Public API Is Now Type-Complete!
Python Type Checker Comparison: Empty Container Inference
Third Party Stubs bundled with Pyrefly
Making Pyrefly Diagnostics 18x Faster
4 Pyrefly Type Narrowing Patterns that make Type Checking more Intuitive

2025

Fly through data validation with Pyrefly’s new Pydantic integration
Pyrefly Beta is here!
Bringing NumPy's type-completeness score to nearly 90%
Give your Python IDE a Glow-Up with Pyrefly
Why Today’s Python Developers Are Embracing Type Hints
Introducing Pyrefly - A new type checker and IDE experience for Python

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