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The /model picker only listed models for the active provider plus that provider's saved model, so a model saved under a different provider in config (e.g. moonshot kimi-k2.6 while active is deepseek) was invisible even though it resolves and runs. Append cross-provider saved models as a labelled tail after the active provider's list; selecting one switches provider on apply via the existing resolved_provider / build_event path. Unknown provider keys are skipped since they cannot be applied. (#2596) Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>