Noticias Tech
LLMs Test Code in Lean: How a zstd Decoder Was Verified
A Google engineer implemented a Zstandard decompressor in Lean with formal proofs generated by an LLM, motivated by the historically steep cost of verifying software like seL4. The experiment explores whether artificial intelligence can make practical an approach that until now was territory reserved for a few teams with nearly unlimited budgets.
Noticias Tech
Null Colon in Shell: Validate Arguments in One Line
An article published on July 23, 2026 by Filip Roséen revisits the null colon, a shell command that does nothing but discard its own result. The trick lets you validate required arguments, assign default values, and truncate files in a single line, a practice that dates back to Thompson’s shell in 1971.









