backup: preserve task 7 offline source and SRT evidence

backups/offline-preservation-20261022/task-7/README.md

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+# Task 7 minimal offline preservation
+
+User-approved shared backup for continued work by root, Claude and Grok. This independent backup branch does not update the release candidate, main, dev or tags.
+
+Source snapshot: `0f8fdbc30ea640c764b38ee598d8f4d135c81c85`, branch `release-prep/2d-jet-multilevel-20261020`, tree `e0ab4a6b974d188e8bf1a1cedd0d2705ef27cefe`. The snapshot contains 247 selected source/test/documentation files; it is not a full Git history.
+
+`horsea-required.tar.gz` is the original unchanged 729332-byte pack. Its 309 payload files and embedded manifest were verified after Horsea-to-Mac transfer. It contains the saved SRT input NPZ/PTX, matching-cache/rebuilt SASS text, exact RNE scratch scripts/results/provenance, and recent gate/integration summaries. No credentials, raw caches, cubins, training outputs or unrelated data are included. Git authentication is not part of this backup.
+
+The embedded manifest retains its original local-preservation wording. The user subsequently explicitly approved sharing this exact pack through this Gitea backup branch; the original archive and manifest bytes are preserved.
+
+After retrieval, verify the files against `SHA256SUMS` before unpacking. `MANIFEST.json` lists each payload origin, byte size and SHA256. The archive contains regular files only and no absolute or parent-traversal paths.
+
+Evidence limitations remain: blocked historical SASS was rebuilt, matching uniform cache usage was not bound to the old run receipt, and current-candidate GPU reproduction plus measured GPU reciprocal were not executed. This backup does not establish release acceptance or an SRT fix.

backups/offline-preservation-20261022/task-7/SHA256SUMS

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+4ae14dd3cf28a4f3d7c17ec9a56a6b2bf18a3b1348dc78f4706c8a46b4cb7263  MANIFEST.json
+8f605aeac6e61c3471fbd2c602bb1567e97508d81b18ebcbd3bff50b31a100c3  README.md
+5c08447090c269320e32f9f390419254d77213986620dc759df1d84b12f07bfe  UPLOAD-AUDIT.json
+b898e60d0bf782f62ded61fc3d4264b45d1bb106cd0722de85e24d432e9c564b  horsea-required.tar.gz

backups/offline-preservation-20261022/task-7/UPLOAD-AUDIT.json

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+{
+  "archive_sha256": "b898e60d0bf782f62ded61fc3d4264b45d1bb106cd0722de85e24d432e9c564b",
+  "archive_bytes": 729332,
+  "manifest_file_count": 309,
+  "archive_member_count": 310,
+  "verified_all_files": true,
+  "forbidden_paths": [],
+  "secret_pattern_hits": [],
+  "head": "0f8fdbc30ea640c764b38ee598d8f4d135c81c85",
+  "upload_scope": "Only original verified archive, its embedded manifest, checksum and concise retrieval README; no credentials or Git authentication copied."
+}