98% local, on a self-extended Pi Agent 'software factory'

This person runs DeepSeek V4 Flash Vision on two DGX Sparks for roughly 98% of their work, calling the output about Opus 4.8 quality — more than enough, in their view, given a well-built harness. That harness is Pi Agent with a number of self-written extensions, which they describe as turning it into a full 'agentic software factory' for hands-off work.