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spec(port): port the padding ciphertext length class balance guard (Refs #8884) - #9753
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…efs gHashTag#8884) The twenty-ninth W2 target of the CR-CHAT-04 ring tracker: the class-balance rules - the batch ceiling, the record floor, then per record the zero-size probe, the class-index ceiling and the repeated-id scan, then over the whole batch the chi-squared ceiling on the class counts - as the D5 verdict with every payload field, the original's rule order, and all ten PCLB tests transcribed plus helper and rule-order tests. The class counts accumulate in f64 from the start (the int-to-float cast the backends reject), the arithmetic identical for integer counts; PCLB-01 measures exactly sixty, the exact boundary fixture (two, eight, eleven over the last three classes) measures exactly fifteen and passes. The BTreeSet dedup becomes a scan over the visited records. 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-ab # 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Superseded by #10175: the remaining CR-CHAT targets now land as one port-wave batch per specs/policy/pr_budget.t27 (#10067/#10074), which asks for one PR per ring batch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-ninth W2 target delivered: the class-balance rules — batch ceiling (4096), record floor (16), per-record zero-size probe, class-index ceiling (< 4), repeated-id scan ([32]u8), then the chi-squared ceiling over the class counts (≤ 15.0; counts accumulate in f64 from the start — the int-to-float cast the backends reject, arithmetic identical for integer counts) — D5 verdict carrying idx / got / bound / got_f / bound_f for every variant, original rule order, all ten PCLB tests transcribed plus helper and rule-order tests (12 total, 0 vacuous). Exact fixtures: PCLB-01 (twenty in one class) measures chi 60.0; the boundary probe (2/8/11 over the last three classes) measures exactly 15.0 and passes (rule is strictly >). 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.