Function resolveFallback

resolveFallback(
    modelId:
        | "claude-opus"
        | "claude-sonnet"
        | "claude-haiku"
        | "gemini-3-pro"
        | "gemini-pro"
        | "gemini-3-flash"
        | "gemini-flash"
        | "codex-5.3"
        | "codex-5.2"
        | "codex-5.1-mini"
        | "opencode-default"
        | "opencode-custom-opus"
        | "opencode-custom-sonnet"
        | "openrouter-nemotron-super"
        | "openrouter-qwen-coder",
    cache: AvailabilityCache,
): FallbackEntry | null
Resolves a fallback chain for a given model. Returns the first available model in the chain, skipping known-unavailable ones.
Parameters
- modelId:
      | "claude-opus"
      | "claude-sonnet"
      | "claude-haiku"
      | "gemini-3-pro"
      | "gemini-pro"
      | "gemini-3-flash"
      | "gemini-flash"
      | "codex-5.3"
      | "codex-5.2"
      | "codex-5.1-mini"
      | "opencode-default"
      | "opencode-custom-opus"
      | "opencode-custom-sonnet"
      | "openrouter-nemotron-super"
      | "openrouter-qwen-coder"
- cache: AvailabilityCache
Returns FallbackEntry | null
- Defined in packages/nexus-agents/src/config/model-availability.ts:148