056 — REVIEWED: full xz_knowledge_p1 payload structure and claim audit Review date: 2026-09-05. Final survey snapshot: 14:37:12 UTC. Conclusion All 3,484 xz_knowledge_p1 posts were reviewed structurally from hash-verified source captures. Their distinct, opaque, size-clustered bodies and the separate cadence review support automated publishing or storage. The contents are not recovered. Agent memory, an improvement process, encryption algorithm, operator identity and a swarm are not established. Scope and reproducibility Input: 039-private/checkpoint-0036-20260905T143712065390Z.metadata.jsonl Input SHA256: 4e6ed9e034f58d0edd5b0e6ddebd4b82152393a20233e93ca745d08edceaf60f Script: investigation/china/056-review-xz.py (run with swarmhunt/.venv/bin/python). Private measurements: 056-private/summary.json and rows.json. No decoded payloads saved. All 4,872 valid source capture hashes were verified before exact author selection. Independently extracted text hashes for all 3,484 selected bodies agree with the earlier monitor. Rows are sorted by numeric ID, not capture order: the survey began with sparse anchors. No target requests, pasted code execution, key searches or decryption were performed. The selected series spans displayed 2026-07-10 22:24 to 2026-07-20 19:20, IDs 4548564–4552377. Dates are website claims with unresolved timezone provenance. A shared author label does not authenticate a single sender. First source: https://paste.ubuntu.org.cn/4548564 Last source: https://paste.ubuntu.org.cn/4552377 Encoding and uniqueness 3,484/3,484 bodies become canonical standard Base64 under the spaces-to-plus hypothesis. There are no literal plus signs; 3,453 bodies have spaces, and 55 have leading or trailing spaces. The 31 without spaces already meet the same encoding test. This is consistent with a form encoding mistake, but the original submitted bytes are unavailable. Public text exports preserve spaces exactly. All 3,484 authored hashes and all 3,484 transformed binary hashes are distinct. None of the decoded bodies is valid UTF-8. None passes the tested Fernet binary layout (version and length constraints). These results concern one explicit transformation; they do not prove the absence of every possible encoding. Size cohorts (characters -> decoded bytes; count; displayed first through last) 124 -> 93 bytes; 178 posts; 2026-07-10 22:24 through 2026-07-12 05:10 304 -> 226 bytes; 143 posts; 2026-07-12 18:02 through 2026-07-13 05:58 364 -> 271 bytes; 71 posts; 2026-07-13 06:03 through 2026-07-13 11:55 424 -> 316 bytes; 358 posts; 2026-07-12 05:15 through 2026-07-13 11:13 428 -> 319 bytes; 300 posts; 2026-07-13 12:01 through 2026-07-14 13:47 472 -> 352 bytes; 146 posts; 2026-07-14 13:52 through 2026-07-15 02:51 488 -> 364 bytes; 239 posts; 2026-07-13 11:18 through 2026-07-15 00:20 500 -> 374 bytes; 1153 posts; 2026-07-15 03:00 through 2026-07-19 04:56 532 -> 397 bytes; 605 posts; 2026-07-15 00:25 through 2026-07-19 22:36 572 -> 428 bytes; 291 posts; 2026-07-19 18:58 through 2026-07-20 19:20 These are serialized binary sizes, not recovered plaintext sizes. Several cohorts overlap in time. The ten sizes must not be described as one monotonically growing memory. Statistical checks and their limits The concatenated 1,211,284 decoded bytes contain all 256 byte values, with empirical byte entropy 7.999850 bits/byte. zlib compresses them to 1.000310 times their original size (slight expansion). This is compatible with ciphertext or random-looking data; it does not identify encryption, exclude precompressed content, or establish a purpose. There are no repeated leading or trailing 8-, 12-, or 16-byte values across this sample. That rules out repetition only at those tested positions. A nonce field has not been identified, so this is NOT proof of no nonce reuse. No authentication tag has been identified either. Corrections to XZ_FINDINGS.md A separate local note calls this an agent named 心斋, encrypted growing memory, and raw AEAD using AES-GCM/ChaCha-style 16-byte tags. Those are stronger claims than these data support. Treat them as hypotheses, not reviewed findings. The spelling xinzhai does not establish its Chinese characters; naming resemblance and temporal proximity do not authenticate its relationship to xz. The nearby xinzhai multipart family has stronger Fernet-layout evidence (report 028). That cannot be transferred to these short xz bodies. A Fernet timestamp lies inside the signed region, but it becomes authenticated for an investigator only after successful keyed verification. No such verification was done here. The official specification requires recomputing and comparing the keyed HMAC: https://github.com/fernet/spec/blob/master/Spec.md The fixed survey contains 79 xinzhai-family posts, including three short print tests and 76 parts in nine groups. Version labels are not evidence that all intervening versions existed, nor that their contents were memory. Claims in other notes about additional versions or broad key searches need their own source scope and validation. Interpretation A scheduled storage client is a plausible explanation. So are a test harness or another automated publisher. The word knowledge is a label on opaque data, not observed knowledge or reasoning. A Chinese host and a romanized name do not establish Chinese authorship or a research laboratory. No confirmed swarm attribution follows from the larger sample. Read the companion 055-cadence-review.txt for the complete temporal review. The existing /posts collection remains the documented fixed 1,142-post export; this review covers all 3,484 locally captured bodies.