New bone src/sim/heatsource.ts: a HeatSource sits between the knob and
the browning integrator — the dial sets target, output chases it on a
fuel-specific lag, every station reads output. Five fuels (gas/electric/
induction/charcoal/radiant) + appliance SKUs (oven_gas, oven_fan,
cheap_electric). roasting.ts retrofit is golden-preserving: optional
src?, reads src.output ?? power, byte-identical when absent.
Verified in-browser:
- GOLDEN: no-src oven = mean 0.698 / blister 1.0 / collapse 0 (== HEAD).
- M-H1 chase 3->9: gas 0.433s, electric 6.0s, induction 0.133s (distinct).
- residual after 9->0: gas 0@1s, electric 6.6@6s, charcoal 9@30s.
- M-H2: gas oven stdev 0.1207 vs fan 0.0016 at equal mean 0.6001 (75x).
- day 14 bruschetta now roasts on oven_gas, still grades S (9.62); oven
HUD reads 'GAS OVEN 8 · blue flame', tomatoes visibly hot-at-centre.
Doctrine: OPUS-BUILD-BRIEF-HEAT.md (the cross-cutting heat & environment
doctrine — 'you never cook the knob, you cook the lag'). Harness:
t.heatChase/residual/ovenStdev/ovenGolden/ovenDemo.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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