ept.git/ep_run/eig_traj.py, branch xiang Unnamed repository; edit this file 'description' to name the repository. magic-s2000 study: reg_delay/noadaptc flags, 4-arm queue v2, redx trajectory audit 2026-07-05T03:35:16+00:00 Yuren Hao yurenh2@illinois.edu 2026-07-05T03:35:16+00:00 b11d9c6da6ce32471e1c25a6f1b5e7a0a568774d - lt_ep_train: --reg_delay N (reg-free early phase: resreg/jr/floss/adaptc off for first N steps) + --noadaptc (kill hidden jacreg==0 damping feedback that would pollute single-reg ablation arms) - queue v2: 4 arms delay-first (abl_delay = reg-free 2k -> proven pair) - eig_traj/2/3: ARPACK audit of redx_traj — the run crossed the edge EARLY and oscillated (s1000 rotating-unstable, s1400 excursion mu=+2.1 self-recovered, s2000 the ONLY stable snapshot mu=-0.02, s2100/s2200 already back out) => s2000 is a post-excursion STABILITY-DIP capture, dip width <100 steps; learning survives mild instability (val fell through unstable stretches). lead_rho cold-40 under-reads clusters — NOT a classifier; ARPACK for audits. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn 
- lt_ep_train: --reg_delay N (reg-free early phase: resreg/jr/floss/adaptc off
  for first N steps) + --noadaptc (kill hidden jacreg==0 damping feedback that
  would pollute single-reg ablation arms)
- queue v2: 4 arms delay-first (abl_delay = reg-free 2k -> proven pair)
- eig_traj/2/3: ARPACK audit of redx_traj — the run crossed the edge EARLY and
  oscillated (s1000 rotating-unstable, s1400 excursion mu=+2.1 self-recovered,
  s2000 the ONLY stable snapshot mu=-0.02, s2100/s2200 already back out) =>
  s2000 is a post-excursion STABILITY-DIP capture, dip width <100 steps;
  learning survives mild instability (val fell through unstable stretches).
  lead_rho cold-40 under-reads clusters — NOT a classifier; ARPACK for audits.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn