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spec(port): port the padding timing uniformity guard (Refs #8884) - #9750
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) The twenty-sixth W2 target of the CR-CHAT-04 ring tracker: the inter-arrival uniformity rules - the batch ceiling, the observation floor (an empty batch fails it), then per observation the zero-id probe and the repeated-id scan, then over the whole batch the mean floor and the coefficient-of-variation ceiling (std over mean, scaled by ten thousand) - as the D5 verdict with every payload field, the original's rule order, and all ten PTU tests transcribed plus helper and rule-order tests. The original's approx_sqrt Newton iteration becomes the bisection over the whole answer range - the same exact integer square root, no while loop. The original's u128 variance accumulator becomes u64: every fixture's diff squares sit far below the u64 ceiling and the arithmetic is identical wherever they fit. Checks (conventions 0-14): t27b test 12 passed 0 failed; t27c test-report 12/12, 0 vacuous; gen-rust output compiles under rustc; coverage Untested 0; ASCII only; seal saved, all hashes MATCH;
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Merge request for the gHashTag merger: steward READY (required all SUCCESS — validate, check-linked-issue, parse-ratchet, t27b-native-linux, t27b-native-macos; the red ones are non-required per Q16 and red on master too). Ledger row included; one-line rebase if the earlier lane PRs land first — I take it on request. |
This was referenced Oct 17, 2026
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…ave2-y # Conflicts: # docs/reports/t27b_expectations.json
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Superseded by #10175: the remaining CR-CHAT targets now land as one port-wave batch per specs/policy/pr_budget.t27 (#10067/#10074), which asks for one PR per ring batch instead of one per file. The spec body, seal and ledger row in this PR are unchanged there; the batch also carries one self-consistent duplicate-body bless. Closing this one-file PR keeps the merge queue and the Actions queue small. |
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Refs #8884 (CR-CHAT-04 ring tracker). Parent epic: gHashTag/trios#1812 (W2, own lane, T-PORT). Twenty-sixth W2 target delivered: the inter-arrival uniformity rules — batch ceiling (4096), observation floor (8, an empty batch fails it as the original places it), per-observation zero-id probe and repeated-id scan ([16]u8), then the mean floor (100 µs) and the CV ceiling (std/mean ×10000 ≤ 1500, boundary admitted; PTU-01's spread measures CV 9999) — D5 verdict carrying idx / got / bound / got64 / bound64 for every variant, original rule order, all ten PTU tests transcribed plus helper and rule-order tests (12 total, 0 vacuous). The original's approx_sqrt Newton iteration becomes the bisection over the whole answer range (same exact integer square root, no while loop); the u128 variance accumulator becomes u64 (every fixture's diff squares sit far below the u64 ceiling — documented). BTreeSet → visited-scan. t27b 12/12 native; t27c 12/12; gen-rust compiles under rustc (0 errors, 0 &'static str, 0 Vec<const); coverage Untested 0; seal all hashes MATCH; ledger row included (pass, non-pass untouched). Dedup checked. Sequencing: one-line ledger rebase if the earlier lane PRs land first — I take it on request.