An API Schema Describes Vendor Intent, Not Client Behavior
A documented hash in a VK button broke mini-app navigation; comparing three links found the cause where another schema-based hypothesis did not.
Andrey Gaag
I design reliable AI-agent systems for production: tool contracts, memory, HITL, observability, and failure recovery.
I test where agent systems lie to us and to themselves.
Latest field notes
All notesA Dynamic Tail in the System Prompt Disables the Provider Cache
A timestamp and memory near the start of a 92K-token agent request made every call cold; a stable prefix and cached-token metric made the defect testable.
CUDA PTX vs. SASS: Toolchain and GPU Architecture Decide Whether the Model Runs
Why a fresh llama.cpp build still crashed on Blackwell and how native SASS removed the incompatible PTX JIT path.
A Stupid Mistake That Broke the Agent's Context
A slice taken from the wrong end made a multimodal agent receive the oldest images instead of the newest ones.
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All projectsQuickBrowser
A minimalist macOS browser picker that routes links to the right browser and learns repeated choices.