Predictable Code
Use Predictable Code to transform Software Development with Verified, Specification-Driven AI
Sign up for the betaBuilding trust throughverification
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automation
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trustworthy,
accountable,
and
reliable.
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Our technology integrates formal verification, compliance monitoring, and process automation, ensuring performance and integrity at every stage of the software lifecycle.
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Predictable Research
Use Predictable Research to get accurate proven research results with sources and proof traces.
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Engineering
lean4-tree-sitter: Parse Any Language from Lean 4
We open-sourced lean4-tree-sitter, a Lean 4 library that provides typed bindings for tree-sitter, enabling structured parsing of Java, Python, and Kotlin with verified properties.
Engineering
lean4-json-schema: Proven-Correct JSON Schema in Lean 4
We open-sourced lean4-json-schema, a Lean 4 library that derives JSON Schemas from types and proves at compile time that serialization always validates.
Engineering
lean4-markdown: Generate Markdown documents in Lean
We open-sourced lean4-markdown, a typed Lean 4 library for building and rendering Markdown documents programmatically.
Formal Verification
AI thinks your code is correct, but it can not prove it.
Your tests pass and your CI is green. But often, bugs lie hidden beyond your examples or unit tests. Discover how subtle invariant violations in everyday Java code can escape traditional testing, and why formal verification is the most powerful tool to catch them, or better: prove the absence of said bugs.