feat: add LLM Gateway provider (#7847)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: Aiden Cline <63023139+rekram1-node@users.noreply.github.com>
Co-authored-by: Aiden Cline <aidenpcline@gmail.com>

packages/opencode/src/provider/provider.ts

@@ -390,6 +390,17 @@ function custom(dep: CustomDep): Record<string, CustomLoader> {
         },
       }
     }),
+    llmgateway: () =>
+      Effect.succeed({
+        autoload: false,
+        options: {
+          headers: {
+            "HTTP-Referer": "https://opencode.ai/",
+            "X-Title": "opencode",
+            "X-Source": "opencode",
+          },
+        },
+      }),
     openrouter: () =>
       Effect.succeed({
         autoload: false,

packages/opencode/src/provider/transform.ts

@@ -807,7 +807,7 @@ export function options(input: {
     result["promptCacheKey"] = input.sessionID
   }
 
-  if (input.model.api.npm === "@openrouter/ai-sdk-provider") {
+  if (input.model.api.npm === "@openrouter/ai-sdk-provider" || input.model.api.npm === "@llmgateway/ai-sdk-provider") {
     result["usage"] = {
       include: true,
     }
@@ -944,7 +944,7 @@ export function smallOptions(model: Provider.Model) {
     }
     return { thinkingConfig: { thinkingBudget: 0 } }
   }
-  if (model.providerID === "openrouter") {
+  if (model.providerID === "openrouter" || model.providerID === "llmgateway") {
     if (model.api.id.includes("google")) {
       return { reasoning: { enabled: false } }
     }

packages/opencode/test/preload.ts

@@ -62,6 +62,7 @@ delete process.env["AWS_PROFILE"]
 delete process.env["AWS_REGION"]
 delete process.env["AWS_BEARER_TOKEN_BEDROCK"]
 delete process.env["OPENROUTER_API_KEY"]
+delete process.env["LLM_GATEWAY_API_KEY"]
 delete process.env["GROQ_API_KEY"]
 delete process.env["MISTRAL_API_KEY"]
 delete process.env["PERPLEXITY_API_KEY"]