AI Engineering

Notes on making probabilistic systems shippable: evaluation harnesses, LLM judges, context engineering, agents, and the GCP estate underneath them. Everything here comes from production systems — method extracted from work, written to be reused.

2026-08-14 · agents · context-engineering

Memory Lives Beyond the Context Window

An agent's memory is everything it can reach, not just its context window. A preprint, Reading More, Finding Less, tests that idea with pre-registered experiments and finds the failure is routing: a hand-curated memory index sent the agent to the wrong files, plain file search beat it, and saved memories almost never got read again. The full corpus and harness ship with the paper for re-running.

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Related: the case study on evaluation gates for a 700,000-student agent system, the GCP dossier, and the working papers on agent harnesses and structural waste.