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The detailed technical changelog is maintained in the repository. For the at-a-glance status of every published version, see Versions & Compatibility. For high-level summaries and migration guides, see Release Notes. View Changelog on GitHub → AdCP uses Changesets for protocol package version management. Pull requests that change the published protocol surface include an adcontextprotocol changeset compiled into the changelog at release time. App, site, billing, admin, infrastructure, and other non-protocol changes do not appear in the protocol package changelog. Protocol changes follow semantic versioning.