name: Registry Change Feed
description: |
  Track package metadata changes across Packagist.org. Designed for mirror operators
  and dependency-analysis tools that need to keep a local cache in sync. The change
  log is retained for 24 hours only, so consumers must poll within that window.
api: packagist-api
governance:
  classification: read-only
  authentication: none
  retention: 24 hours
operations:
- operationId: getMetadataChanges
  intent: Pull updates and deletions since a given Unix-ms timestamp.
- operationId: getStatistics
  intent: Inspect aggregate registry totals (packages, versions, installs).
inputs:
- name: since
  required: false
  description: Unix timestamp (milliseconds) of the last successful poll.
outputs:
- name: actions
  description: Ordered list of update/delete actions for affected packages.
- name: timestamp
  description: Server timestamp to use as the next `since` value.