Artifact 394b4efa275a2a330e3a16ee4147943a7cb82c5940325c076e40cb46b9ff5d6b:
Two gaps the first green run exposed.
The repository carried 26 fuzz targets that CI never fuzzed. They reached CI only through their fixed-seed smoke tests inside `zig build test`, so the fuzzing investment was half-realized: the targets compiled and ran a handful of canned cases, but nothing swept them. `zig build fuzz` runs one target per invocation, so the new step loops. The target list is read from the step's own usage output rather than kept in the workflow — a target added to fuzz_tests.zig is swept automatically, with no second list to drift. Seed and rounds are fixed (1, 2000), not random: a red run has to be reproducible verbatim on a developer machine. Bare `zig build fuzz` exits non-zero because it is a usage error, so the enumeration tolerates that; every real invocation still fails the job. Verified by running the identical block under bash — 26/26 targets pass at seed 1.
src/ci_test.zig moves with it. `fuzz` leaves not_in_ci (its stated reason was that wiring a bounded CI invocation belonged to a later step — that step is this one) and a new ci_parameterized table records it as covered-in-a-loop, carrying the exact anchor that proves the invocation exists. The anchor is verified, not trusted: an entry whose anchor drifts out of the workflow fails like any other gap. That distinction is kept separate from not_in_ci on purpose — conflating 'runs, in a loop' with 'deliberately skipped' is how a step silently stops being covered while a stale excuse keeps the pin green.
actions/checkout v4 -> v5 clears the Node 20 deprecation warning the green run reported. by dmestas on 2026-07-19 01:09:25.
C CI:\ssweep\severy\sseeded\sfuzz\starget,\sand\sbump\scheckout\sto\sv5\n\nTwo\sgaps\sthe\sfirst\sgreen\srun\sexposed.\n\nThe\srepository\scarried\s26\sfuzz\stargets\sthat\sCI\snever\sfuzzed.\sThey\sreached\sCI\nonly\sthrough\stheir\sfixed-seed\ssmoke\stests\sinside\s`zig\sbuild\stest`,\sso\sthe\nfuzzing\sinvestment\swas\shalf-realized:\sthe\stargets\scompiled\sand\sran\sa\shandful\sof\ncanned\scases,\sbut\snothing\sswept\sthem.\s`zig\sbuild\sfuzz`\sruns\sone\starget\sper\ninvocation,\sso\sthe\snew\sstep\sloops.\sThe\starget\slist\sis\sread\sfrom\sthe\sstep's\sown\nusage\soutput\srather\sthan\skept\sin\sthe\sworkflow\s—\sa\starget\sadded\sto\nfuzz_tests.zig\sis\sswept\sautomatically,\swith\sno\ssecond\slist\sto\sdrift.\sSeed\sand\nrounds\sare\sfixed\s(1,\s2000),\snot\srandom:\sa\sred\srun\shas\sto\sbe\sreproducible\nverbatim\son\sa\sdeveloper\smachine.\sBare\s`zig\sbuild\sfuzz`\sexits\snon-zero\sbecause\nit\sis\sa\susage\serror,\sso\sthe\senumeration\stolerates\sthat;\severy\sreal\sinvocation\nstill\sfails\sthe\sjob.\sVerified\sby\srunning\sthe\sidentical\sblock\sunder\sbash\s—\s26/26\ntargets\spass\sat\sseed\s1.\n\nsrc/ci_test.zig\smoves\swith\sit.\s`fuzz`\sleaves\snot_in_ci\s(its\sstated\sreason\swas\nthat\swiring\sa\sbounded\sCI\sinvocation\sbelonged\sto\sa\slater\sstep\s—\sthat\sstep\sis\nthis\sone)\sand\sa\snew\sci_parameterized\stable\srecords\sit\sas\scovered-in-a-loop,\ncarrying\sthe\sexact\sanchor\sthat\sproves\sthe\sinvocation\sexists.\sThe\sanchor\sis\nverified,\snot\strusted:\san\sentry\swhose\sanchor\sdrifts\sout\sof\sthe\sworkflow\sfails\nlike\sany\sother\sgap.\sThat\sdistinction\sis\skept\sseparate\sfrom\snot_in_ci\son\npurpose\s—\sconflating\s'runs,\sin\sa\sloop'\swith\s'deliberately\sskipped'\sis\show\sa\nstep\ssilently\sstops\sbeing\scovered\swhile\sa\sstale\sexcuse\skeeps\sthe\spin\sgreen.\n\nactions/checkout\sv4\s->\sv5\sclears\sthe\sNode\s20\sdeprecation\swarning\sthe\sgreen\srun\nreported. 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edbd7d8aa464dd5ff79dc4894cfb6a85 U dmestas Z 40d238e002e22a1ab975c4bed7340b76