Checking My Dark Factory's Receipts After 4,000 Runs
Eight days after pruning 65% of Leaf's prompts and adding Dream telemetry: 655 planning rooms cost 40% less, 91% of bugs self-healed, and 1 metric lied.
~/Code/jduncan-blog
Engineering, craft, and curiosity.
Self-taught engineer, recovering history major. Tech, woodworking, home automation.
Eight days after pruning 65% of Leaf's prompts and adding Dream telemetry: 655 planning rooms cost 40% less, 91% of bugs self-healed, and 1 metric lied.
An accidental 1,199-room randomized trial in Leaf showed Opus 5.5 halves downstream rework as an Architect, GPT-6.1-Sol wins builds, and overrides lose.
At 39.9B tokens and 4,044 runs in Leaf, catching a lying rework denominator proved why 28.3% Tech Lead rejections make 99.6% unattended merges work.
Six agentic development rules from a year of building software factories, 15.8B tokens, and deleting harnesses when the data pushed back.
Inside my dark factory hardware fleet: 6 mini-PCs, 48 pod slots, why a 2.6x faster Zen 4 CPU only runs CI 1.17x faster, and why AWS costs $20k-$33k/year.