shower: the draft controller against the accepted one

Scenario s1: hot-pipe volume 0.3 L, hot supply 60 C, cold-pressure drop at 40 s. Simplified plumbing, not calibrated to an installed shower. Both runs come from the built plimsoll/sandbox-sim image through the project API; the fingerprints below are the SHA-256 of each trajectory as recorded from that image.

The simulator is written in C, compiled to WebAssembly and shipped in that image: its source, EXTERNAL · source repo ↗. A controller is a separate program that reads the simulator's observations each tick and sets its input. This page runs two hand-written controllers against it: a draft that makes a plausible mistake and fails, and an accepted one that passes the environment's scoring program. The controllers, the scoring program and the other scenarios are not published. Every simulator in the image, EXTERNAL · source repo ↗.

Work in progress. These charts show two hand-written reference controllers. No AI-generated controller is plotted for this environment yet.

Draft controllerscaldmax T 58.714, scald at 3.5, first in band s 3.2, band fraction 0.013, drawn L 11.789, hot drawn L 6.226, volume until s 89.9, minimum comfort flow L s 0.08

Accepted controllerscore 0.889max T 39.265, scald at none, first in band s 18.3, band fraction 0.889, drawn L 11.788, hot drawn L 5.894, volume until s 89.9, minimum comfort flow L s 0.08

Draft controllerAccepted controllerhard limit

Table view (100 rows)

seconds	draft T_head_C	draft hot_valve_position	draft cold_valve_position	draft hot_flow_L_s	draft cold_flow_L_s	draft drawn_L	draft hot_drawn_L	draft action	accepted T_head_C	accepted hot_valve_position	accepted cold_valve_position	accepted hot_flow_L_s	accepted cold_flow_L_s	accepted drawn_L	accepted hot_drawn_L	accepted action
0	20.0000	0.0000	0.0000	0.0000	0.0000	0.0000	0.0000	see fingerprint	20.0000	0.0000	0.0000	0.0000	0.0000	0.0000	0.0000	see fingerprint
0.9	20.0000	1.0000	0.0000	0.1333	0.0000	0.0951	0.0951	see fingerprint	20.0000	0.3000	0.7000	0.0400	0.0933	0.1060	0.0355	see fingerprint
1.8	20.0256	1.0000	0.0000	0.1333	0.0000	0.2151	0.2151	see fingerprint	19.9916	0.3000	0.7000	0.0400	0.0933	0.2260	0.0715	see fingerprint
2.7	25.4779	1.0000	0.0000	0.1333	0.0000	0.3351	0.3351	see fingerprint	18.8835	0.3000	0.7000	0.0400	0.0933	0.3460	0.1075	see fingerprint
3.6	47.5191	0.0000	1.0000	0.0000	0.1333	0.4551	0.4202	see fingerprint	15.6663	0.3000	0.7000	0.0400	0.0933	0.4660	0.1435	see fingerprint
4.5	25.6195	0.6362	0.3638	0.0848	0.0485	0.5751	0.4339	see fingerprint	14.6018	0.3000	0.7000	0.0400	0.0933	0.5860	0.1795	see fingerprint
5.4	43.5359	0.7784	0.2216	0.1038	0.0295	0.6951	0.5475	see fingerprint	14.8638	0.3000	0.7000	0.0400	0.0933	0.7060	0.2155	see fingerprint
6.3	46.6913	0.0000	1.0000	0.0000	0.1333	0.8151	0.5680	see fingerprint	15.8810	0.3000	0.7000	0.0400	0.0933	0.8260	0.2515	see fingerprint
7.2	17.6552	1.0000	0.0000	0.1333	0.0000	0.9351	0.6410	see fingerprint	17.6890	0.3000	0.7000	0.0400	0.0933	0.9460	0.2875	see fingerprint
8.1	58.2298	0.0000	1.0000	0.0000	0.1333	1.0551	0.7182	see fingerprint	19.9585	0.3000	0.7000	0.0400	0.0933	1.0660	0.3235	see fingerprint
9	17.4373	0.8000	0.2000	0.1067	0.0267	1.1751	0.7393	see fingerprint	22.1472	0.3000	0.7000	0.0400	0.0933	1.1860	0.3595	see fingerprint
9.9	46.6757	0.6990	0.3010	0.0932	0.0401	1.2951	0.8543	see fingerprint	23.8623	0.3000	0.7000	0.0400	0.0933	1.3060	0.3955	see fingerprint
10.8	41.9472	0.0000	1.0000	0.0000	0.1333	1.4151	0.8708	see fingerprint	24.9990	0.3000	0.7000	0.0400	0.0933	1.4260	0.4315	see fingerprint
11.7	20.0234	1.0000	0.0000	0.1333	0.0000	1.5351	0.9563	see fingerprint	25.6556	0.3000	0.7000	0.0400	0.0933	1.5460	0.4675	see fingerprint
12.6	58.2790	0.0000	1.0000	0.0000	0.1333	1.6551	1.0252	see fingerprint	25.9935	0.3000	0.7000	0.0400	0.0933	1.6660	0.5035	see fingerprint
13.5	15.7135	0.8729	0.1271	0.1164	0.0169	1.7751	1.0509	see fingerprint	26.1513	0.3000	0.7000	0.0400	0.0933	1.7860	0.5395	see fingerprint
14.4	48.7558	0.6000	0.4000	0.0800	0.0533	1.8951	1.1651	see fingerprint	26.2190	0.3000	0.7000	0.0400	0.0933	1.9060	0.5755	see fingerprint
15.3	38.7005	0.0000	1.0000	0.0000	0.1333	2.0151	1.1773	see fingerprint	26.2461	0.3000	0.7000	0.0400	0.0933	2.0260	0.6115	see fingerprint
16.2	20.2386	1.0000	0.0000	0.1333	0.0000	2.1351	1.2637	see fingerprint	26.2562	0.3000	0.7000	0.0400	0.0933	2.1460	0.6475	see fingerprint
17.1	58.0855	0.0000	1.0000	0.0000	0.1333	2.2551	1.3300	see fingerprint	26.2598	0.5000	0.5000	0.0667	0.0667	2.2660	0.6848	see fingerprint
18	15.3043	0.9829	0.0171	0.1311	0.0023	2.3751	1.3621	see fingerprint	33.5676	0.5475	0.4525	0.0730	0.0603	2.3860	0.7509	see fingerprint
18.9	51.3809	0.5409	0.4591	0.0721	0.0612	2.4951	1.4746	see fingerprint	38.0313	0.5475	0.4525	0.0730	0.0603	2.5060	0.8166	see fingerprint
19.8	36.3869	0.0636	0.9364	0.0085	0.1249	2.6151	1.4852	see fingerprint	38.0539	0.5475	0.4525	0.0730	0.0603	2.6260	0.8823	see fingerprint
20.7	22.2624	1.0000	0.0000	0.1333	0.0000	2.7351	1.5757	see fingerprint	38.0814	0.5475	0.4525	0.0730	0.0603	2.7460	0.9480	see fingerprint
21.6	57.7941	0.0000	1.0000	0.0000	0.1333	2.8551	1.6360	see fingerprint	38.1034	0.5475	0.4525	0.0730	0.0603	2.8660	1.0137	see fingerprint
22.5	14.3960	1.0000	0.0000	0.1333	0.0000	2.9751	1.6690	see fingerprint	38.1159	0.5475	0.4525	0.0730	0.0603	2.9860	1.0794	see fingerprint
23.4	51.7309	0.4995	0.5005	0.0666	0.0667	3.0951	1.7802	see fingerprint	38.1205	0.5475	0.4525	0.0730	0.0603	3.1060	1.1451	see fingerprint
24.3	34.8440	0.1829	0.8171	0.0244	0.1089	3.2151	1.7899	see fingerprint	38.1213	0.5475	0.4525	0.0730	0.0603	3.2260	1.2108	see fingerprint
25.2	25.6275	1.0000	0.0000	0.1333	0.0000	3.3351	1.8874	see fingerprint	38.1208	0.5474	0.4526	0.0730	0.0603	3.3460	1.2765	see fingerprint
26.1	57.0557	0.0000	1.0000	0.0000	0.1333	3.4551	1.9432	see fingerprint	38.1201	0.5474	0.4526	0.0730	0.0603	3.4660	1.3422	see fingerprint
27	14.1204	1.0000	0.0000	0.1333	0.0000	3.5751	1.9810	see fingerprint	38.1194	0.5474	0.4526	0.0730	0.0603	3.5860	1.4079	see fingerprint
27.9	53.0239	0.4000	0.6000	0.0533	0.0800	3.6951	2.0892	see fingerprint	38.1186	0.5474	0.4526	0.0730	0.0603	3.7060	1.4736	see fingerprint
28.8	31.4858	0.2000	0.8000	0.0267	0.1067	3.8151	2.0960	see fingerprint	38.1178	0.5474	0.4526	0.0730	0.0604	3.8260	1.5392	see fingerprint
29.7	26.0372	1.0000	0.0000	0.1333	0.0000	3.9351	2.1944	see fingerprint	38.1170	0.5474	0.4526	0.0730	0.0604	3.9460	1.6049	see fingerprint
30.6	56.5311	0.0000	1.0000	0.0000	0.1333	4.0551	2.2473	see fingerprint	38.1163	0.5473	0.4527	0.0730	0.0604	4.0660	1.6706	see fingerprint
31.5	14.0200	1.0000	0.0000	0.1333	0.0000	4.1751	2.2927	see fingerprint	38.1155	0.5473	0.4527	0.0730	0.0604	4.1860	1.7363	see fingerprint
32.4	54.9838	0.3410	0.6590	0.0455	0.0879	4.2951	2.3979	see fingerprint	38.1148	0.5473	0.4527	0.0730	0.0604	4.3060	1.8020	see fingerprint
33.3	29.3717	0.2633	0.7367	0.0351	0.0982	4.4151	2.4047	see fingerprint	38.1140	0.5473	0.4527	0.0730	0.0604	4.4260	1.8676	see fingerprint
34.2	28.4163	1.0000	0.0000	0.1333	0.0000	4.5351	2.5064	see fingerprint	38.1133	0.5473	0.4527	0.0730	0.0604	4.5460	1.9333	see fingerprint
35.1	55.5715	0.0000	1.0000	0.0000	0.1333	4.6551	2.5534	see fingerprint	38.1126	0.5473	0.4527	0.0730	0.0604	4.6660	1.9990	see fingerprint
36	13.5397	1.0000	0.0000	0.1333	0.0000	4.7751	2.5997	see fingerprint	38.1118	0.5472	0.4528	0.0730	0.0604	4.7860	2.0647	see fingerprint
36.9	55.2139	0.2995	0.7005	0.0399	0.0934	4.8951	2.7029	see fingerprint	38.1111	0.5472	0.4528	0.0730	0.0604	4.9060	2.1303	see fingerprint
37.8	27.9792	0.3829	0.6171	0.0511	0.0823	5.0151	2.7110	see fingerprint	38.1104	0.5472	0.4528	0.0730	0.0604	5.0260	2.1960	see fingerprint
38.7	32.4877	1.0000	0.0000	0.1333	0.0000	5.1351	2.8181	see fingerprint	38.1097	0.5472	0.4528	0.0730	0.0604	5.1460	2.2617	see fingerprint
39.6	54.2180	0.0000	1.0000	0.0000	0.1333	5.2551	2.8606	see fingerprint	38.1089	0.5472	0.4528	0.0730	0.0604	5.2660	2.3273	see fingerprint
40.5	13.8041	1.0000	0.0000	0.1333	0.0000	5.3715	2.9140	see fingerprint	38.1276	0.4287	0.5713	0.0653	0.0528	5.3787	2.3909	see fingerprint
41.4	55.9873	0.2000	0.8000	0.0320	0.0800	5.4873	3.0154	see fingerprint	38.7857	0.4229	0.5771	0.0645	0.0534	5.4849	2.4491	see fingerprint
42.3	41.2593	0.0000	1.0000	0.0000	0.1067	5.5835	3.0171	see fingerprint	38.1043	0.4229	0.5771	0.0645	0.0534	5.5911	2.5072	see fingerprint
43.2	20.8556	1.0000	0.0000	0.1333	0.0000	5.6968	3.1063	see fingerprint	38.0908	0.4229	0.5771	0.0645	0.0534	5.6972	2.5652	see fingerprint
44.1	58.5259	0.0000	1.0000	0.0000	0.1067	5.8049	3.1694	see fingerprint	38.0868	0.4228	0.5772	0.0645	0.0534	5.8034	2.6233	see fingerprint
45	23.0590	0.6000	0.4000	0.0880	0.0347	5.9032	3.1829	see fingerprint	38.0832	0.4228	0.5772	0.0645	0.0534	5.9095	2.6814	see fingerprint
45.9	42.0067	0.8000	0.2000	0.1120	0.0160	6.0219	3.2975	see fingerprint	38.0804	0.4228	0.5772	0.0645	0.0534	6.0156	2.7394	see fingerprint
46.8	55.0301	0.0000	1.0000	0.0000	0.1067	6.1222	3.3216	see fingerprint	38.0786	0.4228	0.5772	0.0645	0.0534	6.1218	2.7975	see fingerprint
47.7	14.1249	1.0000	0.0000	0.1333	0.0000	6.2275	3.3707	see fingerprint	38.0775	0.4228	0.5772	0.0645	0.0534	6.2279	2.8555	see fingerprint
48.6	55.1744	0.2000	0.8000	0.0320	0.0800	6.3433	3.4721	see fingerprint	38.0769	0.4228	0.5772	0.0645	0.0534	6.3341	2.9136	see fingerprint
49.5	41.2443	0.0000	1.0000	0.0000	0.1067	6.4395	3.4738	see fingerprint	38.0763	0.4228	0.5772	0.0645	0.0534	6.4402	2.9716	see fingerprint
50.4	20.8540	1.0000	0.0000	0.1333	0.0000	6.5528	3.5629	see fingerprint	38.0758	0.4228	0.5772	0.0645	0.0534	6.5464	3.0297	see fingerprint
51.3	58.5123	0.0000	1.0000	0.0000	0.1067	6.6609	3.6260	see fingerprint	38.0753	0.4228	0.5772	0.0645	0.0534	6.6525	3.0878	see fingerprint
52.2	21.7658	0.6000	0.4000	0.0800	0.0533	6.7625	3.6381	see fingerprint	38.0756	0.5093	0.4907	0.0679	0.0654	6.7618	3.1459	see fingerprint
53.1	40.2996	0.8884	0.1116	0.1184	0.0149	6.8825	3.7516	see fingerprint	36.9637	0.5468	0.4532	0.0729	0.0604	6.8818	3.2109	see fingerprint
54	48.0258	0.0000	1.0000	0.0000	0.1333	7.0025	3.7782	see fingerprint	38.0650	0.5470	0.4530	0.0729	0.0604	7.0018	3.2765	see fingerprint
54.9	16.2876	1.0000	0.0000	0.1333	0.0000	7.1225	3.8512	see fingerprint	38.0886	0.5470	0.4530	0.0729	0.0604	7.1218	3.3422	see fingerprint
55.8	58.2581	0.0000	1.0000	0.0000	0.1333	7.2425	3.9308	see fingerprint	38.0919	0.5470	0.4530	0.0729	0.0604	7.2418	3.4078	see fingerprint
56.7	17.9980	0.7834	0.2166	0.1045	0.0289	7.3625	3.9512	see fingerprint	38.0947	0.5470	0.4530	0.0729	0.0604	7.3618	3.4735	see fingerprint
57.6	46.2225	0.7397	0.2603	0.0986	0.0347	7.4825	4.0669	see fingerprint	38.0962	0.5470	0.4530	0.0729	0.0604	7.4818	3.5391	see fingerprint
58.5	43.4121	0.0000	1.0000	0.0000	0.1333	7.6025	4.0853	see fingerprint	38.0966	0.5469	0.4531	0.0729	0.0604	7.6018	3.6047	see fingerprint
59.4	17.7413	1.0000	0.0000	0.1333	0.0000	7.7225	4.1634	see fingerprint	38.0962	0.5469	0.4531	0.0729	0.0604	7.7218	3.6704	see fingerprint
60.3	58.4182	0.0000	1.0000	0.0000	0.1333	7.8425	4.2371	see fingerprint	38.0957	0.5469	0.4531	0.0729	0.0604	7.8418	3.7360	see fingerprint
61.2	16.4811	0.8000	0.2000	0.1067	0.0267	7.9625	4.2581	see fingerprint	38.0951	0.5469	0.4531	0.0729	0.0604	7.9618	3.8016	see fingerprint
62.1	46.6758	0.6995	0.3005	0.0933	0.0401	8.0825	4.3732	see fingerprint	38.0945	0.5469	0.4531	0.0729	0.0604	8.0818	3.8672	see fingerprint
63	41.9634	0.0000	1.0000	0.0000	0.1333	8.2025	4.3897	see fingerprint	38.0939	0.5469	0.4531	0.0729	0.0604	8.2018	3.9329	see fingerprint
63.9	20.0013	1.0000	0.0000	0.1333	0.0000	8.3225	4.4751	see fingerprint	38.0932	0.5469	0.4531	0.0729	0.0604	8.3218	3.9985	see fingerprint
64.8	58.2962	0.0000	1.0000	0.0000	0.1333	8.4425	4.5443	see fingerprint	38.0926	0.5468	0.4532	0.0729	0.0604	8.4418	4.0641	see fingerprint
65.7	15.7487	0.8634	0.1366	0.1151	0.0182	8.5625	4.5694	see fingerprint	38.0920	0.5468	0.4532	0.0729	0.0604	8.5618	4.1297	see fingerprint
66.6	48.4991	0.6000	0.4000	0.0800	0.0533	8.6825	4.6836	see fingerprint	38.0914	0.5468	0.4532	0.0729	0.0604	8.6818	4.1953	see fingerprint
67.5	38.6998	0.0000	1.0000	0.0000	0.1333	8.8025	4.6958	see fingerprint	38.0908	0.5468	0.4532	0.0729	0.0604	8.8018	4.2610	see fingerprint
68.4	20.2385	1.0000	0.0000	0.1333	0.0000	8.9225	4.7821	see fingerprint	38.0903	0.5468	0.4532	0.0729	0.0604	8.9218	4.3266	see fingerprint
69.3	58.0851	0.0000	1.0000	0.0000	0.1333	9.0425	4.8484	see fingerprint	38.0897	0.5468	0.4532	0.0729	0.0604	9.0418	4.3922	see fingerprint
70.2	15.3045	0.9829	0.0171	0.1311	0.0023	9.1625	4.8805	see fingerprint	38.0891	0.5468	0.4532	0.0729	0.0604	9.1618	4.4578	see fingerprint
71.1	51.3800	0.5410	0.4590	0.0721	0.0612	9.2825	4.9930	see fingerprint	38.0885	0.5468	0.4532	0.0729	0.0604	9.2818	4.5234	see fingerprint
72	36.3906	0.0633	0.9367	0.0084	0.1249	9.4025	5.0037	see fingerprint	38.0879	0.5468	0.4532	0.0729	0.0604	9.4018	4.5890	see fingerprint
72.9	22.2536	1.0000	0.0000	0.1333	0.0000	9.5225	5.0941	see fingerprint	38.0874	0.5467	0.4533	0.0729	0.0604	9.5218	4.6546	see fingerprint
73.8	57.7936	0.0000	1.0000	0.0000	0.1333	9.6425	5.1544	see fingerprint	38.0868	0.5467	0.4533	0.0729	0.0604	9.6418	4.7203	see fingerprint
74.7	14.3960	1.0000	0.0000	0.1333	0.0000	9.7625	5.1874	see fingerprint	38.0862	0.5467	0.4533	0.0729	0.0604	9.7618	4.7859	see fingerprint
75.6	51.7309	0.4995	0.5005	0.0666	0.0667	9.8825	5.2986	see fingerprint	38.0857	0.5467	0.4533	0.0729	0.0604	9.8818	4.8515	see fingerprint
76.5	34.8440	0.1829	0.8171	0.0244	0.1089	10.0025	5.3083	see fingerprint	38.0851	0.5467	0.4533	0.0729	0.0604	10.0018	4.9171	see fingerprint
77.4	25.6274	1.0000	0.0000	0.1333	0.0000	10.1225	5.4058	see fingerprint	38.0846	0.5467	0.4533	0.0729	0.0604	10.1218	4.9827	see fingerprint
78.3	57.0558	0.0000	1.0000	0.0000	0.1333	10.2425	5.4616	see fingerprint	38.0840	0.5467	0.4533	0.0729	0.0604	10.2418	5.0483	see fingerprint
79.2	14.1204	1.0000	0.0000	0.1333	0.0000	10.3625	5.4994	see fingerprint	38.0835	0.5467	0.4533	0.0729	0.0604	10.3618	5.1139	see fingerprint
80.1	53.0237	0.4000	0.6000	0.0533	0.0800	10.4825	5.6076	see fingerprint	38.0829	0.5466	0.4534	0.0729	0.0604	10.4818	5.1795	see fingerprint
81	31.4858	0.2000	0.8000	0.0267	0.1067	10.6025	5.6144	see fingerprint	38.0824	0.5466	0.4534	0.0729	0.0604	10.6018	5.2451	see fingerprint
81.9	26.0372	1.0000	0.0000	0.1333	0.0000	10.7225	5.7128	see fingerprint	38.0818	0.5466	0.4534	0.0729	0.0605	10.7218	5.3107	see fingerprint
82.8	56.5311	0.0000	1.0000	0.0000	0.1333	10.8425	5.7657	see fingerprint	38.0813	0.5466	0.4534	0.0729	0.0605	10.8418	5.3763	see fingerprint
83.7	14.0200	1.0000	0.0000	0.1333	0.0000	10.9625	5.8111	see fingerprint	38.0808	0.5466	0.4534	0.0729	0.0605	10.9618	5.4418	see fingerprint
84.6	54.9838	0.3410	0.6590	0.0455	0.0879	11.0825	5.9163	see fingerprint	38.0803	0.5466	0.4534	0.0729	0.0605	11.0818	5.5074	see fingerprint
85.5	29.3717	0.2633	0.7367	0.0351	0.0982	11.2025	5.9231	see fingerprint	38.0797	0.5466	0.4534	0.0729	0.0605	11.2018	5.5730	see fingerprint
86.4	28.4163	1.0000	0.0000	0.1333	0.0000	11.3225	6.0248	see fingerprint	38.0792	0.5466	0.4534	0.0729	0.0605	11.3218	5.6386	see fingerprint
87.3	55.5715	0.0000	1.0000	0.0000	0.1333	11.4425	6.0718	see fingerprint	38.0787	0.5466	0.4534	0.0729	0.0605	11.4418	5.7042	see fingerprint
88.2	13.5397	1.0000	0.0000	0.1333	0.0000	11.5625	6.1181	see fingerprint	38.0782	0.5465	0.4535	0.0729	0.0605	11.5618	5.7698	see fingerprint
89.1	55.2139	0.2995	0.7005	0.0399	0.0934	11.6825	6.2213	see fingerprint	38.0777	0.5465	0.4535	0.0729	0.0605	11.6818	5.8354	see fingerprint

Fingerprints, scenario s1 (0.3, 60, 40)

draft: 4276db47687b962f618c62b08eed77d96deff97be06b46efea18049e5d4fcc1a

accepted: a132391ebd36ac0426f6707895fadda958e9bed74ae41f75d36086fd5185fed4