I A/B tested my own system prompt: 24 generations, one clear win, one rule that did nothing | Flash Onyx 2.2translating…

Flash Onyx is the model line behind FLASH, the local-first agent shell I work on. It is gemma4 plus a system prompt that turns it into an engineering agent. It runs locally, and nothing leaves the machine. FLASH is the shell around it: a terminal chat with an Ollama model that…