The anonymisation rewrite of 2026-08-07 gave every touched commit a new SHA, leaving the references in these documents pointing at objects that no longer exist. The mapping was reconstructed from the backup branches and each pair verified by tree and commit message before substituting.
Prefix lookups were built for lengths 7 to 12 and any ambiguous prefix would have been skipped; none were ambiguous across all 251 pairs.
Thore Cimbal
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