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software-engineering.

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Just-in-Time Tests: How Meta Is Rethinking Software Testing for the Agentic Era

Meta's JiTTests use LLMs to auto-generate bespoke tests per code change, killing false positives and test maintenance overhead in agentic dev workflows.

Just-in-Time Tests: When AI Writes Your Tests Right Before Deployment

Meta's Catching JiTTests use LLMs to auto-generate tests on-demand, targeting regressions without maintenance overhead. A radical shift in testing philosophy.

How Meta Solved Passkey Authentication for Headsets Without Scannable Screens

Meta's novel approach to WebAuthn for XR devices reveals a clever workaround for passkey flows when QR codes aren't possible.

WhatsApp's Rust Rewrite: 160,000 Lines of C++ Gone, Billions Protected

WhatsApp replaced its entire media processing library with Rust, shipping it to 3 billion users. Here's why this is the biggest Rust deployment ever.
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