Two fixes for the reactor unit-confusion drift surfaced in the 2026-05-19
wiki uplift:
1. X_A_init default in reactor.html was 0.001 g COD/m³, which is
effectively zero nitrifying biomass — the reactor cannot nitrify
ammonia under that initial condition (per the project memory note,
~50 mg/L is the minimum). Aligned to the schema default of 200 in
generalFunctions/src/configs/reactor.json. Same change in
test/helpers/factories.js so the test factory mirrors the operational
default; tests that need low-biomass scenarios already override.
2. New test/basic/timestep-units.basic.test.js locks in the
`config.timeStep is interpreted as seconds` contract — verifies the
engine's days-stored / seconds-input invariant and asserts the
schema declares `unit: "s"`, `default: 1`. Companion to the schema
fix in the generalFunctions submodule.
Full test suite: 49/49 pass (was 46/46 + 3 new).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
