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backstage release v3.21.0

Oct 22, 2026 Developer Portal backstage v3.21.0

Added

(agent-platform) Pick the namespace’s EgressPolicies in the agent wizard by @teemow — More options in the new agent wizard and in Edit lists the namespace’s EgressPolicies to pick, each with its origins, above Extra egress origins; picks show on the review and the agent’s page. Not offered for coding Harnesses. Needs agent-manager 2.12.0 or later.

Full Changelog: https://github.com/giantswarm/backstage/compare/v3.20.1...v3.21.0