From b18227f5534284d33ec4f7b0943c90573473c6e7 Mon Sep 17 00:00:00 2001 From: YurenHao0426 Date: Wed, 22 Jul 2026 03:46:36 -0500 Subject: experiments: freeze context-vectorizer C2 recovery --- ROADMAP.md | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'ROADMAP.md') diff --git a/ROADMAP.md b/ROADMAP.md index 702030a..7079f2d 100644 --- a/ROADMAP.md +++ b/ROADMAP.md @@ -125,6 +125,21 @@ fixed linear output-error vectorizer `A_l c` is now the leading limitation: incr directions/frequency or simple gain normalization did not stabilize scratch validation. No C2 test panel may run unless a separately declared mechanism change passes validation. +The mechanism-recovery candidate is a bounded context-conditioned vectorizer, +`a_l = A_l c + G_l vec(c outer tanh(h_top))`, with both pathways calibrated by the same local +node-perturbation regression. The gate term is zero-initialized and vanishes when `c=0`, preserving +neutral-period innovation identification. An exploratory task-seed-0 validation budget compared +linear, per-cell soma-gated, and context-gated forms; `eta_A in {0.005, 0.01, 0.02}`; and K1/e2, +K1/e4, and K4/e4. Bounded context gating with `eta_A=0.01`, K1/e4 was selected by mean d4 +validation accuracy. It recovered 70.2% of BP's task-0 depth gain but retained one bad basin. + +Before any C2 test, an independent confirmation is frozen on new task seeds 3, 4, 5 and student +seeds 0--4, crossing BP, FA, DFA, and context-SDIL at d1/d4 (120 validation-only runs). It uses the +same original C2 thresholds, and additionally requires at least 10/15 context-SDIL depth gains to +be positive; its d4 lesion must lose at least 2 points on average and harm at least 10/15 runs. +Failure closes this recovery. Passing freezes a single test confirmation over task seeds 0--5, +student seeds 0--4, all four methods, and d1/d4, retrained on the unchanged 8,000-example subsets. + ### C3. Causal calibration is genuinely amortized **Status: passed on 2026-07-22.** The frozen five-seed confirmation retained 112.9% of the K16/e4 -- cgit v1.2.3