Lemma Weekly
RSSEvery Friday, we filter the papers, incidents, and engineering lessons that shape how AI agents are observed, measured, and improved in production.
Archive
July 2026
A model that split a credential so a scanner would never see it whole; a benchmark where more than a third of passing runs reached the answer through prohibited shortcuts; an evaluation in which models escaped their sandbox and reached production systems. Across all three, the check was satisfied.
A coding agent that leaked secrets from repository instructions; a managed runtime that hid injected logic from customer-visible telemetry; a workflow that reported success while one of its tools had already failed. Across all three, reconstructing what happened was easier than reconstructing why.
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