ept.git/docs/campaign/FINDINGS.md, branch xiang

FINDINGS: 2026-07-11 consolidated hardening entry

2026-07-10T04:38:36+00:00

FINDINGS: K3 sealed — matched-tuning parity n=3 (EP 2.0500+-0.015 vs BP 2.0530+-0.004), the three-act retraction arc documented

2026-07-09T21:13:27+00:00

Co-Authored-By: Claude Fable 5 
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn

FINDINGS: final C1 verdict — equilibrium fb-EP 2.2949 beats BP 2.3694 (same init/seed/steps), cos 1.0000 throughout, 3.9x BP cost

2026-07-09T15:42:11+00:00

Co-Authored-By: Claude Fable 5 
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn

FINDINGS: cascade pivot one-day arc — bridge, solver saga, fb message-passing, init root cause, diagC 2.9021 result

2026-07-09T15:11:19+00:00

Co-Authored-By: Claude Fable 5 
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn

FLAGSHIP: warm_fast 1.7065 final — beats tuned BP anchor by 0.086, param-matched twin by 0.257

2026-07-07T19:51:16+00:00

Co-Authored-By: Claude Fable 5 
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn

FINDINGS: magic-s2000 mechanism entry (stability-dip audit)

2026-07-05T03:35:53+00:00

Co-Authored-By: Claude Opus 4.8 
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn

omega/norm-family refuted as stability signal; fingerprint story retracted; eigreg v2 = true map-eigenvalue (spec_penalty)

2026-07-03T12:57:22+00:00

- eig_control: fix plain-PI bug (shifted PI for lambda_max of indefinite Sym);
  add lead_rho + spec_penalty (soft one-sided cap on |lam|(I+eps*J_F), 2-D
  Rayleigh-Ritz, matvec-only) — aep 'spectral' ported. eig_penalty demoted to
  diagnostic.
- eig_recheck.py (Lanczos audit): omega=+5..+13 on ALL operators incl the
  stablest (s2000 +12.8 while true alpha=-0.02); gap omega-alpha~10; old
  'warm -10.14 vs scratch +1.11' numbers were PI-mixture artifacts. RETRACTED.
- eig_v2_smoke/depth: v2 mechanics validated vs ARPACK; z_T1 readings >1 are
  unconverged-state contamination (150: 1.009 -> 400/800: 0.997-0.999,
  mu=-0.02..-0.006 matching eig_probe); fixed-point top = BAND of slow modes.
- lt_ep_train: --eigreg now spec_penalty (--eig_margin 0.995 = rho target);
  --fingerprint reports rho/Re_mu instead of num_abscissa.
- ONBOARDING §4-7 + FINDINGS 2026-07-03: retraction + verdict (fundamental
  quantity = finite-horizon path LE / resreg axis; de-cliff via floss-ept;
  spec_penalty = measure-mode scalpel for a detaching Hopf pair).

Co-Authored-By: Claude Opus 4.8 
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn

Initial commit: ept — backprop-free equilibrium transformer (EP)

2026-07-03T10:56:50+00:00

Code (ep_run/), organized docs (docs/{method,campaign,hardware,outreach,paper}),
analysis scripts (scripts/), ONBOARDING.md entry point. Large data/checkpoints
git-ignored (share separately).

Co-Authored-By: Claude Opus 4.8 
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn