Artifact e4026acd7b3cb9daffcea2974e22fcdbefae68160627698a559bf8012d5bd695:
.zit-cache/checkpoint pairs a validated log-prefix key with the prefix's crosslink record body; Repository.open resumes past the flat segment on a cache miss instead of re-parsing it. Witness shape under a closed emission gate creates zero artifacts; tree shape pins the anchor's file set as the canonical S-tree (batch-oracle byte-identical, one interior root node). verify re-derives every claim from real history; --no-cache bypasses both sidecars. New verb: zit checkpoint [show|build|verify|drop].
pkgsrc (163k commits, 60k files): cold open 8.4s vs 352s full derive; verify passes; 366/367 tree nodes deduplicated against the imported tree. by dmestas on 2026-08-10 23:12:57.
C Add\szit\scheckpoint:\sdurable\sprefix\sresume\sfor\shybrid\shistory\n\n.zit-cache/checkpoint\spairs\sa\svalidated\slog-prefix\skey\swith\sthe\sprefix's\ncrosslink\srecord\sbody;\sRepository.open\sresumes\spast\sthe\sflat\ssegment\son\sa\ncache\smiss\sinstead\sof\sre-parsing\sit.\sWitness\sshape\sunder\sa\sclosed\semission\ngate\screates\szero\sartifacts;\stree\sshape\spins\sthe\sanchor's\sfile\sset\sas\sthe\ncanonical\sS-tree\s(batch-oracle\sbyte-identical,\sone\sinterior\sroot\snode).\nverify\sre-derives\severy\sclaim\sfrom\sreal\shistory;\s--no-cache\sbypasses\sboth\nsidecars.\sNew\sverb:\szit\scheckpoint\s[show|build|verify|drop].\n\npkgsrc\s(163k\scommits,\s60k\sfiles):\scold\sopen\s8.4s\svs\s352s\sfull\sderive;\nverify\spasses;\s366/367\stree\snodes\sdeduplicated\sagainst\sthe\simported\stree. 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