- build_datasets.py: unified generator for ChatML JSONL (kicad, spice, freecad, stm32, embedded, iot, emc, dsp, power, platformio) - validate_dataset.py: format/structure/duplicate validation - 549 examples generated and validated, zero API calls - Plans 23 + 23v2: all build_*_dataset.py tasks marked done Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>