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backstage release v0.133.0

Jun 1, 2026 Developer Portal backstage v0.133.0

Added

AI chat: add Opus 4.8 context window info.

Changed

AI chat: make the Anthropic thinking config model-aware so adaptive-thinking Claude models (Opus 4.5+, Sonnet 4.6) use the adaptive thinking interface with a configurable effort (aiChat.anthropic.effort, default high), while older Claude models keep the legacy budget-based interface.

Fixed

AI chat: forward chat-level errors to the error reporter (Sentry) so the “Network error” banner is no longer silent, and log a backend warning when the client disconnects mid-stream. See ./docs/releases/v0.133.0-changelog.md for more information.