Tech spike: four smoke-test runs and a divergence-stop test

Pipeline works on MPS (~105 s per 300-step run), results are reproducible,
and the divergence stop works. Not experimental evidence.

Claude-Session: https://claude.ai/code/session_01S8KN7NuUCm8nXLmy6eDuVv
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Cormac Shannon committed 2026-10-28 18:14:26 +00:00
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run_id,status,qk_norm,learning_rate,n_layer,n_embd,seed,max_iters,params_M,best_val_loss,diverged_at,wall_s,git_commit,dirty,note
20261028-180656_spike-qkoff-lr1e-3,completed,False,0.001,4,256,1337,300,16.03,3.459,,102.9,55ba128dcc,False,tech spike smoke test (not an experiment)
20261028-180840_spike-qkon-lr1e-3,completed,True,0.001,4,256,1337,300,16.03,3.4304,,104.8,55ba128dcc,False,tech spike smoke test (not an experiment)
20261028-181025_spike-qkoff-lr1e-1,completed,False,0.1,4,256,1337,300,16.03,5.2948,,103.4,55ba128dcc,False,tech spike smoke test (not an experiment); divergence-detection check
20261028-181209_spike-qkon-lr1e-1,completed,True,0.1,4,256,1337,300,16.03,3.9026,,105.7,55ba128dcc,False,tech spike smoke test (not an experiment); divergence-detection check
20261028-181408_test-divergence-stop,diverged,False,0.1,4,256,1337,60,16.03,10.9167,0,5.8,55ba128dcc,False,plumbing test of the divergence stop (threshold set artificially low); not an experiment
1 run_id status qk_norm learning_rate n_layer n_embd seed max_iters params_M best_val_loss diverged_at wall_s git_commit dirty note
2 20261028-180656_spike-qkoff-lr1e-3 completed False 0.001 4 256 1337 300 16.03 3.459 102.9 55ba128dcc False tech spike smoke test (not an experiment)
3 20261028-180840_spike-qkon-lr1e-3 completed True 0.001 4 256 1337 300 16.03 3.4304 104.8 55ba128dcc False tech spike smoke test (not an experiment)
4 20261028-181025_spike-qkoff-lr1e-1 completed False 0.1 4 256 1337 300 16.03 5.2948 103.4 55ba128dcc False tech spike smoke test (not an experiment); divergence-detection check
5 20261028-181209_spike-qkon-lr1e-1 completed True 0.1 4 256 1337 300 16.03 3.9026 105.7 55ba128dcc False tech spike smoke test (not an experiment); divergence-detection check
6 20261028-181408_test-divergence-stop diverged False 0.1 4 256 1337 60 16.03 10.9167 0 5.8 55ba128dcc False plumbing test of the divergence stop (threshold set artificially low); not an experiment