Changes and Releases

Updates on Giant Swarm workload cluster releases, apps, UI improvements and documentation changes.

• Aug 27, 2026 Developer Portal backstage v0.197.0

  Added

  • (muster) Support the sigv4 MCPServer auth type and spec.meta in #2126 by @teemow

  Full Changelog: https://github.com/giantswarm/backstage/compare/v0.196.0...v0.197.0

• Aug 27, 2026 AI Agents muster v5.6.0

  Added

  • (metatools) Add filter_resources and filter_prompts, report per-server capability counts in #1099 by @teemow

  Full Changelog: https://github.com/giantswarm/muster/compare/v5.5.6...v5.6.0

• Aug 27, 2026 AI Agents muster v5.5.6

  Fixed

  • (testing) Reject the never-executed step retry, poll with wait_for_state in #1097 by @teemow

  Full Changelog: https://github.com/giantswarm/muster/compare/v5.5.5...v5.5.6

• Aug 27, 2026 AI Agents muster v5.5.5

  Fixed

  • (aggregator) Attribute aggregated resources to their source server in #1098 by @teemow

  Full Changelog: https://github.com/giantswarm/muster/compare/v5.5.4...v5.5.5

• Aug 27, 2026 Developer Portal backstage v0.196.0

  Added

  • (muster) Relabel server lifecycle to Activate/Deactivate/Reconnect in #2125 by @teemow

  Full Changelog: https://github.com/giantswarm/backstage/compare/v0.195.2...v0.196.0

• Aug 27, 2026 AI Agents muster v5.5.4

  Fixed

  • (oauth) Resolve dex cross-client audience scopes per authorization request in #1053 by @QuentinBisson

  Full Changelog: https://github.com/giantswarm/muster/compare/v5.5.3...v5.5.4

• Aug 27, 2026 AI Agents muster v5.5.3

  Fixed

  • (deps) Update aws sdk in #1092 by @renovate[bot]

  Full Changelog: https://github.com/giantswarm/muster/compare/v5.5.2...v5.5.3

• Aug 27, 2026 AI Agents muster v5.5.2

  Changed

  • (helm) Document when to install muster-crds, list all three CRDs in #1095 by @QuentinBisson

  Full Changelog: https://github.com/giantswarm/muster/compare/v5.5.1...v5.5.2

• Aug 27, 2026 AI Agents muster v5.5.1

  Fixed

  • (aggregator) Drop pending-auth registrations when their server is deleted in #1094 by @teemow

  Full Changelog: https://github.com/giantswarm/muster/compare/v5.5.0...v5.5.1

• Aug 27, 2026 AI Agents muster v5.5.0

  Added

  • (oauth) Send RFC 8707 resource and validate RFC 9207 iss in #1040 by @QuentinBisson

  Full Changelog: https://github.com/giantswarm/muster/compare/v5.4.0...v5.5.0

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