Home Assistant's template engine has no abs() function, so every run of
Stove On Detection failed at its first variable ("'abs' is undefined") and
the HVAC failure monitor would fail the same way. Deployment note now points
at labctl blueprints:pull ha.
Claude-Session: https://claude.ai/code/session_01JBPyi1vyBbme5DKykW3Z25
Experimental first draft: infers electric range activity (off/active/probably_on)
from whole-panel split-phase power alone, since there's no dedicated CT clamp on
the stove circuit. Uses phase-balance (240V loads both legs symmetrically) as the
primary discriminator against 120V kitchen appliances in the same wattage range.
rzen