cf-ai-gateway silently drops reasoningEffort, variants, and other provider options (sdkKey/variants missing ai-gateway-provider case) #24432

Description

Two bugs in packages/opencode/src/provider/transform.ts mean that for cf-ai-gateway models whose underlying SDK is ai-gateway-provider (i.e. OpenAI / openai-compatible upstreams), model options and variants never reach the actual SDK:

1. sdkKey() has no case for "ai-gateway-provider". Falls back to model.providerID ("cloudflare-ai-gateway"), so providerOptions() produces { "cloudflare-ai-gateway": { reasoningEffort: "high", ... } }. But ai-gateway-provider/providers/unified creates the language model via createOpenAICompatible({ name: "Unified" }), and @ai-sdk/openai-compatible reads providerOptions from "openai-compatible" / "openaiCompatible" / "Unified" / "unified". None match "cloudflare-ai-gateway" → all options silently dropped.

2. variants() switch has no case for "ai-gateway-provider", so it returns {}. Workflow variant: xhigh input is silently ignored for every cf-ai-gateway model on this codepath.

Net effect: bots on cf-ai-gateway OAI models run at OpenAI's default reasoning effort. The variant: "xhigh" input is dead config, and provider.cloudflare-ai-gateway.models.<id>.options.reasoningEffort in opencode.json is also dead.

Scope: only affects cf-ai-gateway models whose underlying SDK is ai-gateway-provider (OpenAI / openai-compatible upstreams). Anthropic and Google models on cf-ai-gateway resolve to bundled @ai-sdk/anthropic / @ai-sdk/google per models.dev, so sdkKey() returns the right key and providerOptions / variants route correctly for those. Fix is specifically for the ai-gateway-provider codepath.

Expected: sdkKey("ai-gateway-provider") should return "openai-compatible" (the underlying SDK), and variants() should dispatch on model.api.id prefix (openai/..., anthropic/..., etc.) like @ai-sdk/gateway already does.

OpenCode version

Reproduces on 1.4.11 and 1.14.25 (every version since cf-ai-gateway shipped).

Steps to reproduce

Either:

# bonk.yml
model: "cloudflare-ai-gateway/openai/gpt-5.4"
variant: "xhigh"

or

// opencode.json
{
  "provider": {
    "cloudflare-ai-gateway": {
      "models": {
        "openai/gpt-5.4": {
          "options": { "reasoningEffort": "high" }
        }
      }
    }
  }
}

Outgoing POST https://gateway.ai.cloudflare.com/v1/compat/chat/completions body has no reasoning_effort field.

Operating System

Linux, macOS

Impact

Every cf-ai-gateway user on OAI / openai-compatible upstreams wanting non-default reasoning effort, verbosity, or any other provider-specific option.

Related

• openai-compatible provider options silently dropped if provider name contains dot #23622 — same root cause for other providers (sdkKey falls back to providerID)