metrics

In-block (same-level) directed edges

Layer 1　·　PCFG toy 4L d_model=448 / pcfg　·　matryoshka_hook_resid_post_L1　·　1,792 latents in 8 blocks　·　1,016,600 tokens over 3400 docs　·　edge: reverse coverage ≥ 0.5, both endpoints fire ≥ 20

Parent→child within a block (asymmetric containment); co-extensive pairs are reported as duplicates (renames/splits), never edges.

Block B0 (224 features)

• 550 directed edges, 78 duplicate pairs, 550 survive PMI>0; PolyFrac 99%, Gini 0.956.
• S_res: 15/550 edges are genuine refinements (0 children untestable).
• In-block superparents: 3 (e.g. F153 feature 153: 134 children, fires 57%).

parent → child	R	PMI	parent label	child label
201 → 8	1.00	1.33	feature 201	feature 8
120 → 8	1.00	1.41	feature 120	feature 8
13 → 8	1.00	1.44	feature 13	feature 8
109 → 8	0.99	1.36	feature 109	feature 8
7 → 8	0.99	2.91	feature 7	feature 8
31 → 127	0.99	1.31	feature 31	feature 127
34 → 127	0.99	1.35	feature 34	feature 127
13 → 127	0.99	1.43	feature 13	feature 127

Duplicate pairs (rename/split candidates): 7≈101 (feature 7); 13≈31 (feature 13); 13≈34 (feature 13); 13≈46 (feature 13); 13≈52 (feature 13); 13≈97 (feature 13)

Block B1 (224 features)

• 0 directed edges, 0 duplicate pairs, 0 survive PMI>0; PolyFrac 0%, Gini 0.000.

Block B2 (224 features)

• 1 directed edges, 0 duplicate pairs, 1 survive PMI>0; PolyFrac 0%, Gini 0.996.
• S_res: 0/1 edges are genuine refinements (0 children untestable).

parent → child	R	PMI	parent label	child label
513 → 453	0.67	2.40	feature 513	feature 453

Block B3 (224 features)

• 1 directed edges, 0 duplicate pairs, 1 survive PMI>0; PolyFrac 0%, Gini 0.996.
• S_res: 0/1 edges are genuine refinements (0 children untestable).

parent → child	R	PMI	parent label	child label
708 → 675	0.59	3.77	feature 708	feature 675

Block B4 (224 features)

• 0 directed edges, 0 duplicate pairs, 0 survive PMI>0; PolyFrac 0%, Gini 0.000.

Block B5 (224 features)

• 0 directed edges, 0 duplicate pairs, 0 survive PMI>0; PolyFrac 0%, Gini 0.000.

Block B6 (224 features)

• 1 directed edges, 0 duplicate pairs, 1 survive PMI>0; PolyFrac 0%, Gini 0.996.
• S_res: 1/1 edges are genuine refinements (0 children untestable).

parent → child	R	PMI	parent label	child label
1407 → 1551	0.52	4.22	feature 1407	feature 1551

Block B7 (224 features)

• 0 directed edges, 0 duplicate pairs, 0 survive PMI>0; PolyFrac 0%, Gini 0.000.