docker/metadata-action joined the watched set.

{"event":"population_change","format_version":1,"population_change":{"change":"added","reason":{"type":"seed"}},"prev_hash":"sha256:ccb1809a58592f805a235e510a95972075eceb6591039ec67ff28e4cd33dde64","recorded_at":"2026-09-29T18:53:44.590Z","repo":"docker/metadata-action","seq":25,"source_observations":["01M3Q892JCZ52Y0D0EPET6WSS0"]}

The SHA-256 of these bytes is this entry's hash (abb3c64e). The next entry begins with it. Change one byte, and the chain breaks.