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@@ -72,6 +72,7 @@ Runtime conformance — ruby/spec
- CI gates file by file, not on a total: no spec file may pass fewer examples than its recorded row, and none may stop loading. The sum of those rows is 23,672, re-recorded at Ruby 4.0.9 (2026-11-03) on the pinned runner that enforces it — it is what CI guarantees, while the measured total above is what one dated run did. One file (
core/random/bytes_spec.rb) is unstable between 8 and 9 passing examples; since 2026-11-04 its row holds 8, its floor, because a row recorded at the high draw makes the next ordinary run a red build. This replaced a single shrink-only floor of 22,475, which needed a margin wider than the largest spec file and so could not see a regression smaller than that.
- Only
language/ and core/ are swept. ruby/spec's library/, optional/, command_line/ and security/ trees are not run at all, so this figure is not a percentage of Ruby, and most of the standard library sits outside it.
+ - Those unswept trees were measured once, on 2026-11-10, against MRI 4.0.7 through the same shim — a dated run, not a gate. Across the 970 files where the two engines differ the gap is 2,341 examples, and the shape matters more than the size: 78 files cannot be measured at all (every
command_line/ spec is built on ruby_exe, and optional/capi needs a compiled C extension — MRI itself scores zero in them), the largest single debt is a hang rather than a missing feature (Net::FTP is 442 examples behind, with 39 of its 56 files killed by the clock on rbgo and none on MRI), and the outright absences are comparatively small (Coverage 53 examples, WeakRef 9).
- Of the examples that ran, 93.3% pass (22,488 of 24,116); 477 more are skipped because the shim stubs
ruby_exe, ruby_cmd and output_to_fd — three helpers that would need a subprocess or real file-descriptor redirection — and 10 of 2,206 spec files produce no result. Skips and unreadable files sit outside the ratio entirely.
- The guarantee has climbed from a floor of 6,000 on 2026-08-03 to a per-file baseline summing 23,672. Two earlier jumps were fixes to the measurement — the mspec shim, and a parser upgrade that made 13 previously-unparseable spec files visible — which are gains in what the measurement can see, not in what the VM can do.