R12 SD-CST Dedicated-Projection Binding Pilot

Status: training-only pass; source-deletion mechanics gate preregistered; no scored access

Parent results and diagnosis

The content fingerprint itself is viable: joint pilot 693974 reaches 100% on declaration pointers, initial-occurrence pointers, and arbitrary initial state. The exact frozen byte parent is also viable: hierarchical pilot 693977 keeps line/kind/amount/query and one raw STOP at 100%, with every frozen parameter byte-identical. Its model-line mask lifts event-occurrence span exactness from 0% to 32.625%.

693977 is nevertheless rejected. With only new query vectors through the parent's frozen key/query projections, declaration and initial-occurrence all-slot exactness stay zero, event identity is 4.1625%, initial state 17.725%, and whole tape 0.8125%. Report SHA-256 is 2b27cd79ac35cb418c9b4f8f73db7378c9d3f4c0e70785291702d9383213d46a.

The narrow hypothesis is that the frozen parent residual contains the needed bytes/context but its line-task key projection is not a sufficient interface for name-span binding. The next pilot changes that interface only.

Frozen mechanism

The exact parent checkpoint and all inherited parameters remain frozen under the same SHA and byte-digest gates as 693977. The model-selected semantic line plus newline mask is unchanged. The binding path adds:

• one independent bias-free 384-by-384 query projection; and
• one binding-only key adapter: Linear(384,384) -> GELU -> Linear(384,384).

These layers read frozen source memory and are used only by declaration, initial-occurrence, and event-occurrence pointers. They cannot change line addresses, event kind, amount, query, the source encoder, or slot mixer. The shared position-free byte-bigram fingerprint and permutation scorer are unchanged.

The compiler has 20,955,890 parameters; 6,748,897 are trainable. Complete Shohin is 146,057,595 parameters.

Training, parent hash, consumed 40k/8k partition, four epochs, optimizer, losses, raw metrics, zero-access rule, and every gate are identical to the frozen-parent hierarchical preregistration. Only the declared binding projection and its parameters differ. Runtime accounting must reproduce the counts above and remain below the stricter 150M pilot cap, despite global sub-200M authority.

Decision

All 14 inherited hierarchical gates remain immutable, including 100% prefit parent fields, frozen-parent byte identity, at least 90% event/name pointers, at least 80% identity/initial, at least 60% raw whole tape, exactly one raw STOP, and access 0/0.

A pass advances only to shuffled/swap/no-address/hard-negative causal controls and fresh-board end-to-end source deletion. It is not a reasoning score. A failure closes this projected interface before any scored split.

Result

Source commit 9bd2e04ea93406eb50a6fd112cd844892b72a7c4 preceded seed 6715972906370623241. Job 693979 completed on H100 evc22 in 4m04s. Epoch one already reached 7,979/8,000 exact whole tapes; epochs two through four reached 8,000/8,000. The final held-out consumed-training result is:

• 8,000/8,000 initial state, kind, identity, amount, query, and whole tape;
• 8,000/8,000 initial-occurrence pointers;
• 7,999/8,000 declaration pointers;
• 7,998/8,000 event-occurrence pointers;
• exactly one raw STOP on all 8,000 rows; and
• frozen-parent digest unchanged.

All 14 frozen gates pass. The untrained projected prefit has only 1/8,000 whole tapes, so the result is not inherited from the frozen parent. Checkpoint and report SHA-256 values are f347d1aea90dd3c60f7500167c7c22884451b365880259698306c6fce8ab10f3 and 5d6be14798af3a75781898c6405e956fe9eb040e861ee63e669e7b87e7fa6f32. Development and confirmation access remain 0/0.

This passes compiler mechanics only. The next authorized experiment is R12_SD_CST_PROJECTED_MECHANICS_PREREG.md; no fresh scored board is authorized until its separate-process source-deletion and causal controls pass.