actions/upload-artifact joined the watched set.

{"event":"population_change","format_version":1,"population_change":{"change":"added","reason":{"type":"seed"}},"prev_hash":"sha256:51fcd75354cfd90ed275226b9d831f9f45c5b7cb087a5aa1a7158bf2524f99c4","recorded_at":"2026-09-29T18:53:44.590Z","repo":"actions/upload-artifact","seq":16,"source_observations":["01M3Q88XSYQ3CEVC8DAF2VZH5B"]}

The SHA-256 of these bytes is this entry's hash (0b2fa9b0). The next entry begins with it. Change one byte, and the chain breaks.