055 — REVIEWED FINDINGS: complete xz_knowledge_p1 cadence Reviewed 2026-09-05. Local-only analysis of final survey checkpoint. Conclusion The completed collection verifies 3,484 xz_knowledge_p1 posts with distinct authored-body hashes, spanning displayed July 10 22:24 through July 20 19:20. Their strongly periodic, size-dependent scheduling supports automated publication/storage. The extended record shows changing sizes, interrupted secondary activity and an eventual end to this label, not indefinite growth. It does not identify an agent, swarm, operator, nationality or meaning of the opaque data. Scope and reproducibility Frozen input: investigation/china/039-private/checkpoint-0036-20260905T143712065390Z.json Snapshot: 2026-09-05T14:37:12.065589+00:00 Input SHA256: 620d6dcc62fd2f4eefa396c631b43f57e308fcbd31e5c097994eca4aa5005f40 Run: python3 investigation/china/055-cadence-review.py Machine-readable result: investigation/china/055-private/analysis.json, mode 0600 in directory 0700. The input contains 4,872 validated, parsed pages in surveyed numeric range 4548081–4552953, with one deliberately excluded sensitive ID. This review uses only exact author xz_knowledge_p1 and the related improvement-plan label. No network requests, payload decoding or pasted-code execution occurred. Structural fields and hashes are inherited from the hash-checked monitor; this cadence review did not independently reparse raw HTML. All dates below are literal website claims, one-minute resolution, not independently verified creation times or normalized UTC. Source URL format: https://paste.ubuntu.org.cn/. Complete size cohorts (exact authored textarea characters) Size | Count | First displayed date/time | Last displayed date/time | 5/6-minute within-size gaps / total 124 | 178 | July 10 22:24 | July 12 05:10 | 143/177 304 | 143 | July 12 18:02 | July 13 05:58 | 142/142 364 | 71 | July 13 06:03 | July 13 11:55 | 70/70 424 | 358 | July 12 05:15 | July 13 11:13 | 357/357 428 | 300 | July 13 12:01 | July 14 13:47 | 293/299 472 | 146 | July 14 13:52 | July 15 02:51 | 136/145 488 | 239 | July 13 11:18 | July 15 00:20 | 233/238 500 | 1,153 | July 15 03:00 | July 19 04:56 | 1,142/1,152 532 | 605 | July 15 00:25 | July 19 22:36 | 466/604 572 | 291 | July 19 18:58 | July 20 19:20 | 290/290 All 3,484 records have tag python and one authored line. The label/tag is user-supplied metadata, not evidence of Python execution or knowledge content. Daily counts by displayed day July 10: 30; July 11: 86; July 12: 357; July 13: 540; July 14: 384; July 15: 402; July 16: 298; July 17: 381; July 18: 393; July 19: 382; July 20: 231. These are complete counts within the surveyed ID range, not a claim of global author coverage. Phases and changes relative to report 044 1. The 124-character onset remains irregular, with a 936-minute hiatus from July 10 23:35 to July 11 15:11 and fourteen same-minute gaps. The recurring five-minute sequence subsequently dominates. The 124-to-424 size change preserves a five-minute boundary at July 12 05:10–05:15. 2. Report 044's perfect alternation is confirmed and extended. From July 12 18:02 through July 13 11:13, 410 posts alternate exactly between 424 characters and the 304-to-364 cohort: 409 alternating transitions, no same-cohort pair. The 424 cohort then changes to 488 at July 13 11:18, five minutes after its last 424 entry. The 364 cohort changes to 428 at 12:01, six minutes after its last 364 entry. Grouping these continuing size sequences as proposed cohorts extends perfect alternation to 430 posts / 429 transitions, ending at July 13 12:03 (IDs 4549003–4549446). The next post at 12:08 is another 488-character body, breaking alternation before the 428 body at 12:09. This proposed grouping describes timing; it does not authenticate separate writers. 3. Later size cohorts remain mostly periodic but are less cleanly interleaved. The 488 cohort contains gaps of 154 and 831 minutes. The 428-to-472 boundary is five minutes; the 472-to-500 boundary is nine minutes. The 488-to-532 boundary is five minutes. These fit changing payload sizes in continuing jobs but are not software-version identification. 4. The 500 cohort is particularly sustained: 1,153 bodies, 1,081 five-minute and 61 six-minute intervals, with ten longer intervals. The 532 cohort is intermittent: individual within-size gaps include 765, 2,322, 768 and 393 minutes. On July 19 its cadence becomes faster; same-size records alone cannot distinguish one job accelerating from two jobs converging to the same serialized size. Do not equate ten sizes with ten agents. 5. The last 500 body at July 19 04:56 is followed by a 532 body at 05:01. Later 532 and 572 bodies coexist from July 19 18:58 to 22:36. The final 572 cohort continues at exclusively five/six-minute spacing until July 20 19:20. No exact xz_knowledge_p1 label (or any xz_ prefix label) occurs among the 575 validated later pages through ID 4552953 (last page display September 5 15:28). This is an observed end within coverage, not proof the operator stopped globally or could not change labels/sites. One excluded page after the sequence was deliberately not inspected. Improvement-plan correction There are eleven xz_improvement_plan_p1 entries, all 864 characters. The initial approximate six-hour pattern in report 044 persists through the sixth post but not across the entire record: 4548836 July 12 05:12 4548920 July 12 11:13 4548992 July 12 17:14 4549139 July 12 23:15 4549283 July 13 05:15 4549427 July 13 11:17 4549731 July 14 00:51 4550130 July 15 00:24 4551220 July 17 21:35 4551358 July 18 03:36 4552021 July 19 18:11 Successive gaps: 361, 361, 361, 360, 362, 814, 1413, 4151, 361, 2315 displayed minutes. A continuously operating six-hour process is not supported by the complete observed record. The label does not demonstrate actual planning, self-improvement or agent memory. Interpretation and limits A program with periodic tasks, serialized state and restarts or configuration changes explains the observed cadence. Multiple writers are possible but not required. Distinct hashes show these are not exact copies of one authored string; they do not establish distinct semantic content because randomized encryption or encoding can change outputs. This review makes no claim about cryptographic format. Public authors can share or impersonate a label. Host geography, label spelling and the python tag cannot establish Chinese operator provenance. More opaque periodic records strengthen automation evidence, not attribution or proof of autonomous reasoning.