Microsoft's PDD Kit Formally Verifies Agent-Written Full-Stack Code

1 reports archived1 independent sourcesupdated 11/6/2026, 00:00:00

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Microsoft Research introduces PDD Kit, which turns user intent into a Verus formal specification, proves agent-written code meets it for every input, and falls back to tests where proofs cannot reach. It targets the scaling limits of line-by-line human review and the gap between plans and agent output, demonstrated on a full-stack web app.

LATEST/Microsoft Research introduces PDD Kit, which turns user intent into a Verus formal specification, proves agent-written code meets it for every input, and falls back to tests where proofs cannot reach. It targets the scaling limits of line-by-line human review and the gap between plans and agent output, demonstrated on a full-stack web app.

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Microsoft ResearchT1Nov 6, 00:00·72 pts
Microsoft's PDD Kit Formally Verifies Agent-Written Full-Stack Code
- PDD Kit uses a Verus formal spec as an enforced contract between human and coding agent, not just tests
- It proves code for all inputs where possible and falls back to tests where proofs cannot reach
- Demonstrated on a full-stack web app, aiming to make formal methods usable by engineers without a formal background
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