semver
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Tom Preston-Werner
Tom Preston-Werner co-founded GitHub in 2008 and turned it into the world's largest developer platform before Microsoft acquired it for $7.5 billion. Beyond GitHub, he created Gravatar, Jekyll, TOML, and the Semantic Versioning spec — tools used by tens of millions of developers daily. He dropped out of Harvey Mudd College, declined a $300,000 Microsoft bonus to bet on GitHub, angel-invested in over 175 startups including early checks in Stripe and Cursor, and in 2025 launched Preston-Werner Ventures (PWV) targeting a $100M fund. He and his wife signed The Giving Pledge in 2023.
Predrag Gruevski
Predrag Gruevski is an independent software engineer, open-source creator, and Rust ecosystem luminary best known for building Trustfall - a universal query engine that lets you query anything from APIs to LLMs - and cargo-semver-checks, a semantic versioning linter that's becoming a cornerstone of the Rust publish workflow. A former MIT competitive mathematician turned principal engineer at Kensho Technologies, Predrag brings Olympic-level rigor to API design and compiler technology, writing and speaking extensively on correctness-first software development.