R12 ER-TT Addressed Marginal Route Preregistration

Status

Pre-freeze, train-only architectural repair. It may read only the existing ER-TT train.jsonl. Development and confirmation remain forbidden.

Frozen predecessor result

Marginal-route v1.1 job 694909 is rejected because complete witness-pointer rows reached 7,194/8,000 = 89.925% against the frozen 90% gate. No threshold is relaxed. The same run reached 90.9375% packet/joint, 97.0625% state, 98.5375% answer, 90.9375% relation rows, 100% alpha invariance, and 100% oracle-route identity transport.

Independent reconstruction shows all 806 witness-pointer failures contain exactly one wrong occurrence. Most are adjacent-source ambiguities in late after-witness positions. The identity bus and recurrent relation executor are not the observed failure.

Hypothesis

The structural router encodes opaque candidate locations through byte-level token memory and absolute line positions. That leaves neighboring occurrences with weakly separated route keys, especially in longer fourth-rule records.

Add an identity-free address channel with two learned components:

ordinal index of each opaque occurrence within its physical record; and
total opaque-occurrence count for that record.

The original six bytes remain available only to the exact equality what stream after routing. Addresses are computed only from the alpha-invariant opaque-start mask, so renaming any opaque symbol cannot change them. The model still learns every route; no target span, outcome, executor state, answer, or scored split is used at inference.

Architecture and budget

Parent: reconstructed confirmed witness-equality lineage, never a rejected canary checkpoint.
New parameters: two 14 x 384 embeddings (10,752 parameters).
Zero learned motor parameters.
Zero learned reader parameters.
Expected complete system: 185,543,048 parameters.
Expected trainable parameters: 11,140,256.
Headroom below the absolute 200M ceiling: 14,456,952.

Data and optimization

Use the existing 48,000-row ER-TT training split only. A new post-commit seed deterministically chooses 10,000 fit families and 2,000 disjoint probe families, four renderer views each. Preserve the v1.1 budget exactly:

two epochs;
2,500 updates;
32 rows/update from eight complete families;
AdamW, LR 2e-4, 100-step warmup, cosine decay;
no state, trajectory, answer, development, or confirmation supervision.

Frozen gates

All must pass on the one train-only probe read:

packet/state/answer/joint each at least 85%;
complete relation rows at least 90%;
complete witness-pointer rows at least 90%;
events and HALT each at least 95%;
minimum cardinality-specific joint at least 75%;
all hard outputs exactly invariant on 8,000/8,000 neutral-namespace alpha recodes;
source-span oracle-route initial/relation/event/joint exactly 8,000/8,000 through the same equality operator;
exact parameter certificate below 200M;
unchanged confirmed parent; and
train-only/development/confirmation custody exactly 1/0/0.

Failure closes this addressed route before any fresh board. Passing authorizes only a fresh-board development experiment. It does not establish broad, natural-language, or unrestricted reasoning.