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backstage release v3.6.0

Oct 15, 2026 Developer Portal backstage v3.6.0

Added

(agent-platform) Connect Claude and Gemini on Vertex AI in the model form by @QuentinBisson — Connect a model offers Claude on Vertex AI and Gemini on Vertex AI, set up with a Location and a Google Cloud service account key file, whose project the model uses. Needs agent-platform 4.128.0 or later; the LLM gateway does not meter these models.

Full Changelog: https://github.com/giantswarm/backstage/compare/v3.5.0...v3.6.0