{
  "notes": "Episode 10/10, the last decision episode. State on reading: 67/400 items used; no refusals; every batch settled (e03-pilot-rerun shows one item running but was cancelled in episode 9). All 13 handed results read and checked. No new batches: nothing spawned now could be read by any episode, so finish=true and the next step is the write-up. The requester submits; no board rank is claimed from local evidence.\n\nRESULT: THE STACK PASSES THE REQUESTER'S 05:42Z SUBMISSION BAR (pooled gain >= +0.04 over V2 on 4,000 fresh seeds, > 2 se, candidate OOG 0).\nCandidate = STACK, Solidity sha256 2eaafc7960e520b8a7fd322ec8afaff8fa677c730228a961efb509cc30b25719 (15,465 bytes), built on verified base G (sha 610c1905e7dd5559b84e40a3b2d6f8e0b53a7b0ac7574ae33b6c1770a28367cb, the `code` of artifact 206a4888de6fa1bda53cd2c9bad1632ccdbb63d32e7f09b6a332746b7a3ac3c3) by gen(G,K=16,R1=30,R2=36,k=f=s=1): (1) after `uint256 tradeBoost = wmul(TRADE_TOX_BOOST, tradeRatio);` insert `if (!firstInStep && tradeBoost > 16 * BPS) tradeBoost = 16 * BPS;`; (2) before `slots[0] = bidFee; slots[1] = askFee;` insert the first-print rule (on firstInStep cap the lower of bid/ask at 30 bps, ties untouched) then the every-call rule (cap the lower side at 36 bps). Full code is the `code` field of every e09-stack-confirm result; all six copies and e09-stack-tune/t1 carry byte-identical code with that sha (checked here). Result files: a1 c33720874aa1285e9dc766540b8a90410118a8e8b840d949ea0dcc211bdb27c1, b1 1f0e583c525721db0e8ebaf4f001668a3f7773bf506d1c98b7ac887be116a001 (fetch at https://api.imd.fun/artifacts/<sha>). Comparator exact V2 sha 28417e116f57f1029fdd1803832e852574902c1ae7253c05657f317db76da4ab, simulator commit 6b6921f8, 10,000 steps, 250,000 gas, each strategy alone vs Vanilla, MatchRunner configs, b19 harness (tests all_pass, per-seed counters = global, retail+arb reconciliation < 1.3e-11).\nShard A (e09-stack-confirm-a, seeds 4380000..4381999, n=2000): mean_diff +0.043224891299790416, se 0.003943530703625499, sd 0.17636005449328385, worst -0.9886365963045591 (seed 4380438), then -0.9526 (4380970), -0.8596 (4381653). Candidate afterSwap max_ok 213,581, init 220,962, OOG 0, other errors 0; V2 afterSwap max_ok 244,105, init 236,377, OOG 39, other 0. Retail delta +0.04446 se 0.00399, arb -0.00124 se 0.00146. Terciles by V2 retail volume low/mid/high +0.0312/+0.0417/+0.0568. Copies a1, a2, a3 (three machines) agree bit-exactly on mean, se and worst list. a1 ran the unmodified harness in five 400-seed sub-ranges (10-minute command limit); chunk means +0.039/+0.047/+0.038/+0.056/+0.037.\nShard B (e09-stack-confirm-b, seeds 4390000..4391999, n=2000): mean_diff +0.04314031929182184, se 0.0046822435465596, sd 0.20939629714633934, worst -2.0785489651929083 (seed 4390943), then -1.3430 (4391993), -0.9530 (4390052). Candidate max_ok 214,017, init 220,962, OOG 0; V2 max_ok 244,370, OOG 47, other 0. Retail +0.04212 se 0.00424, arb +0.00102 se 0.00265. Terciles +0.0340/+0.0471/+0.0483. b1, b2, b3 bit-identical.\nPOOLED (a1 + b1, disjoint seeds, pooled variance as planned): n 4000, mean_diff +0.04318260529580613, se 0.0030608348142188288 (mean/se 14.1), worst -2.0785489651929083 (4390943), candidate OOG 0 of 41,325,538 afterSwap calls, V2 OOG 86. Bar: >= +0.04 yes, > 2 se yes, OOG 0 yes.\nIndependent replication on five more fresh blocks, same hash, OOG 0: e09-stack-loo/nof 4400000..4400999 +0.04276 se 0.00558 (n1000); nos 4410000 block +0.04918 se 0.00969 (n700, partial); tune t1 4430000..4430999 +0.03986 se 0.00575; t2 4440000..4440999 +0.04111 se 0.00761; t3 4450000..4450999 +0.05225 se 0.00754. Seven fresh blocks, 7,700 seeds, every block positive within about one se of +0.043; the gain is retail (+0.04) with arb flat. It is under 1% of the gap to 10th and nowhere near the +5/+8.7 targets.\n\nLEAVE-ONE-OUT (piece worth = STACK minus LOO, same seeds): afterfirst 30-bps first-print cap +0.00923 se 0.00389 (nof, n1000; LOO sha 94e4747a...; LOO vs V2 +0.03353 se 0.00427). Later 36-bps cap +0.00216 se 0.00422 (nos, n500 only: several 100-seed chunks died, coverage incomplete; LOO sha 54ae8c35...): not distinguishable from zero alone. nok (no boost cap) BLOCKED: host was Darwin arm64, nothing run; the boost cap's worth is inferred by difference (about +0.03), consistent with e08-boost-cap/later +0.02484 se 0.00545 (n512). Pieces are not proven additive; the 30 and 36 caps overlap on first prints.\nTUNE (information only): t1 R1 in 26/28/32/34 vs STACK on 256 training seeds -0.011/-0.002/0.000/+0.006 (se 0.008-0.010), none > 1 se, pick = STACK. t2 R2 in 33/34/38/40: R2=34 +0.0066 se 0.0033 vs STACK on the screen (sha 8fac06b4c485eab7e1ca4b281271ec8c3f519870304e5e5717ea1816aa6d22be), but on holdout 4440000..4440999 R2_34 +0.04089 se 0.00775 vs STACK +0.04111 se 0.00761 on the same seeds: no gain. t3 K in 8/12/24/32: K12 +0.0011 se 0.0039 vs STACK, K8 worse; pick = STACK. The grids are flat: retuning the three constants is not worth more items.\nNEW NEGATIVE: e08-small-floor/later (gated floor of the lower G fee, sha e7f7111d...): every F loses, best F=1 -0.1985 se 0.0062 (n512, retail -0.228, arb +0.029). Floors retired in every gate.\n\nRETIRED FAMILIES, measured loss vs V2: routing table -61.87 se 0.56; exact-router edge table -83.43 se 0.69; closed-form edge optimiser b2 -60.82 se 0.24 (n2000, seed deviation) and -43.98 (n400); interaction hinges -13.67 se 0.40 (n256); phase -5.88 se 0.04; threshold t2 -8.43 se 0.07, t1 -4.39 (n450); position blend p2 -2.08 se 0.035, a3 -33.4 and p1 -39.8 (n256); pos-scale both-side -18.20 se 0.18, attracting-only +0.0091 se 0.0020; continuation h2 -21.66, h4 -23.68, h8 -0.51; flow damping c1 -0.66, c2 -1.48, c3 -0.93; floors -0.5 per bp (all gates) and -0.20 (later, F=1); protect hinges -6.2 to -6.9; flat fees 30-40 bps -166 to -181 (n256); next-mix -0.047 se 0.025; zero skew -0.068 se 0.008; G alone +0.0015 se 0.0014 (gas headroom only). Single gaining pieces: afterfirst caps +0.012/+0.013/+0.015 (n2000 each), every-call lower-side caps +0.008/+0.014/+0.013 (n2000 each), boost cap later K16 +0.025 (n512). V2's dynamics are worth about 170-175 of its 520 edge; the leaders' extra +5 to +8.7 was not found in any mapping tried. Unmarked n is 2000.\n\nLIMITATIONS: board transfer rests on the requester's earlier observation (paired gains transferred within 1 se twice); the +0.04 bar is the requester's estimate of what passes 28th. Local absolute V2 means (524.1 shard A, 522.5 shard B) differ from the board's 519.68 because seeds differ; only paired differences are used. nos is partial and nok never ran, so the boost cap's worth is inferred. Workers never chose seeds in episode 9.\n\nSEED LEDGER (final): 4000000..4459999 allocated or retired; used for the STACK: 4380000..4381999, 4390000..4391999, 4400000..4400999, 4410000..4410999 (partial), 4430000..4430999, 4440000..4440999, 4450000..4450999. NEXT FREE = 4460000 for any file with a new hash.\n\nDECISION: finish=true. Nothing spawned, cancelled or read. The write-up must give: the STACK code (from a1/b1 `code`) and sha 2eaafc79...; the pooled paired result {n 4000, mean_diff +0.04318260529580613, se 0.0030608348142188288, worst -2.0785489651929083 at seed 4390943}; gas {candidate afterSwap max_ok 214,017, init 220,962, OOG 0; V2 max_ok 244,370, OOG 86 of 41.3M calls}; the per-shard numbers; the seven-block replication; the LOO attribution with its gaps; every retired family above; and the honest conclusion that the +5/+8.7 targets were not reached and the stack is a small confirmed gain the requester may submit under the +0.04 rule. Recommendation: submit the STACK file unchanged (t1/t2/t3 found no better constant), then post the board score as a note.",
  "spawn": [],
  "read": [],
  "cancel": [],
  "finish": true
}