Dated experiment record. Statements describe this run, not current submission readiness. Historical H. pylori category names do not establish infection; copy screens are bounded tests. Claims that a source does not exist mean none was identified in that recorded search, not proof of absence. Licensing interpretations in the notes remain unconfirmed. Local access details have been omitted. Current limitations and remaining work.

Z-Image exact-caption alignment

Result

FAIL; close the Z-Image LoRA path. Inference-only run 20260827T024006Z-zimage-prompt-alignment completed successfully on deployed commit b4de1124989b695911ea4dc89db865b79a2b18e9, but every whole-checkpoint cell is mechanically disqualified by generated text and fails the full-resolution normal-gastric topology gate.

Frozen intervention and integrity

The intervention changed only the positive prompt to the exact byte-identical caption present in all 32 corrected normal training records. Z-Image revision, the four LoRA checkpoint hashes, negative prompt, seed 41001, 1024x1024 RGB geometry, 50 steps, CFG 4.0, and CFG-normalization setting remained frozen.
Config SHA-256 is e75dbd19631a958d11938e80035e9c1a506e9e4672d28e2f2263be2dfc5e134f. Remote immutable preflight reverified the source run, deployed source commit, all four checkpoint hashes, and exact prompt equality across all 32 metadata rows.
Exit code is 0, ZIMAGE_PROMPT_ALIGNMENT_COMPLETE is present, and every entry in the retrieved ALL_SHA256SUMS passes locally.
All four outputs are 1024x1024 RGB PNGs. Step/output SHA-256 values are: 32 7edfc4a9a7ca65b3f28c5f5db577c82c5be80857fba839a6fe028eee9c7f3c42; 64 4760c171d97a966cda84544aa41b80bf1ced5f1972b031d83d5dc362a9f604f7; 96 8c922ce392a991d2e357324e132596d12dd8a8a65dc2701c0e47b9ad8a6649d2; 128 dd5e61780be5cb57c4d5a1481c6bc006bac10a6b6ca79a18d918f5751c89545b.

Privacy and Sydney-QA

Privacy passes against both corrected corpora. Against the 32-field normal specialist, maximum DINO cosine is 0.900356 and minimum dHash distance is 22. Against the full corrected 128-field corpus, maximum DINO cosine is 0.900797 and minimum dHash distance is 20. There are no exact pixel matches. These are privacy checks, not clinical-quality evidence.

Sydney-QA completed on all four cells and remains CALIBRATION_REQUIRED. No GI-pathologist-annotated patient/slide-disjoint real envelope exists, so its measurements cannot establish clinical correctness, diagnosis, Sydney grade, or OLGA/OLGIM and do not replace pathologist review.

Whole-checkpoint engineering review

Step	Mean absolute gradient	Sydney-QA glands/mm2	Mucin/vacuole candidates/mm2	Block max cosine	Result
32	13.139663	99.0	742.7	0.9993	Generated pseudo-label text; mirrored/stacked tissue bands and papillary projections; reject
64	11.913954	165.1	924.6	1.0000	Generated pseudo-label text; repeated rosettes and papillary structures with large blank separation; reject
96	9.660728	115.1	954.1	0.9994	Generated pseudo-label text; repeated villiform/papillary structures and non-gastric composition; reject
128	8.030359	131.6	855.4	0.9986	Generated pseudo-label text; simplified repetitive papillary topology and poor cellular detail; reject

The exact caption made the physical-scale phrase visibly render as text despite the frozen negative prompt prohibiting text and annotations. All four cells are therefore automatic mechanical failures before morphology selection. Their stacked/mirrored tissue organization is also materially worse than the original attempt-4 cells and untouched real normal reference. No whole checkpoint passes.

Runtime, cost, and cleanup

The worker ran from 2026-08-27T02:40:06Z to 2026-08-27T02:46:12Z, or 366 seconds. Conservative A100 instance uptime is below 564 seconds, approximately US$0.58 at US$3.673385/hour. Bounded recovery-CPU uptime is below 278 seconds, approximately US$0.01 at US$0.134/hour. Total conservative compute is below US$0.59 before temporary storage, credits, and tax; the A100 itself was Spot.

Both workers are terminated. After local hash, dimension, privacy, and Sydney-QA extraction, the exact temporary recovery instance, disk, and snapshot were deleted. The original stopped disk remains retained.

Decision

The preregistered stop rule fires: close the Z-Image LoRA path. Do not run Z-Image IM, gastritis, mixed, canvas, or candidate-pool jobs. Prompt tuning would now select against synthetic failures and would not address the model's repeated inability to reproduce local normal gastric topology.

The next eligible challenger must be separately preregistered. The strongest already-measured remaining open-weight candidate is FLUX.2 Klein Base 4B at the immutable M1 revision: its zero-shot normal was weaker than Z-Image, but its Apache-2.0 4B base now has a first-party-supported official Diffusers LoRA path. Any run remains normal-only and must use the same corrected corpus, untouched reference, privacy thresholds, and Sydney-QA uncertainty before another category can open.

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