change to support multiple vendors

Author: kinseydurhamgrace

cli/cmd/engine-cli/main.go

@@ -37,7 +37,7 @@ var (
 	selectedModel            string
 	defaultModel             string
 	availableModels          []string
-	modelVendor              string
+	modelVendors             []string
 )
 
 func main() {
@@ -97,7 +97,7 @@ func init() {
 	runCmd.Flags().StringVar(&selectedModel, "selected-model", "", "Selected model for this job")
 	runCmd.Flags().StringVar(&defaultModel, "default-model", "", "Default model for this engine")
 	runCmd.Flags().StringSliceVar(&availableModels, "available-model", nil, "Available model for this engine (repeatable)")
-	runCmd.Flags().StringVar(&modelVendor, "model-vendor", "", "Model vendor for filtering (e.g. Anthropic, OpenAI)")
+	runCmd.Flags().StringSliceVar(&modelVendors, "model-vendor", nil, "Model vendor for filtering (repeatable, e.g. Anthropic, OpenAI)")
 
 	_ = runCmd.MarkFlagRequired("repo")
 }
@@ -163,7 +163,7 @@ func runEngine(cmd *cobra.Command, args []string) error {
 		SelectedModel:            selectedModel,
 		DefaultModel:             defaultModel,
 		AvailableModels:          availableModels,
-		ModelVendor:              modelVendor,
+		ModelVendors:             modelVendors,
 	}
 
 	prNumber := setup.PRNumber
@@ -286,7 +286,7 @@ func runEngine(cmd *cobra.Command, args []string) error {
 		env.SelectedModel = selectedModel
 		env.DefaultModel = defaultModel
 		env.AvailableModels = availableModels
-		env.ModelVendor = modelVendor
+		env.ModelVendors = modelVendors
 	}
 
 	result := runner.Run(ctx, command, env, runner.Options{WorkingDir: workingDir}, runnerCallbacks)

cli/internal/runner/runner.go

@@ -26,7 +26,7 @@ type Environment struct {
 	SelectedModel   string
 	DefaultModel    string
 	AvailableModels []string
-	ModelVendor     string
+	ModelVendors    []string
 }
 
 // Callbacks contains optional callbacks for runner events.
@@ -156,8 +156,10 @@ func buildEnv(env Environment, extra map[string]string) []string {
 		}
 	}
 
-	if env.ModelVendor != "" {
-		platformVars["GITHUB_MODEL_VENDOR"] = env.ModelVendor
+	if len(env.ModelVendors) > 0 {
+		if encoded, err := json.Marshal(env.ModelVendors); err == nil {
+			platformVars["GITHUB_MODEL_VENDORS"] = string(encoded)
+		}
 	}
 
 	for k, v := range platformVars {

cli/internal/server/server.go

@@ -35,7 +35,7 @@ type JobConfig struct {
 	SelectedModel            string
 	DefaultModel             string
 	AvailableModels          []string
-	ModelVendor              string
+	ModelVendors             []string
 }
 
 // ProgressEvent represents a progress event received from an engine.
@@ -228,8 +228,8 @@ func (s *MockPlatformServer) handleGetJob(w http.ResponseWriter, r *http.Request
 			response["available_models"] = s.jobConfig.AvailableModels
 		}
 
-		if s.jobConfig.ModelVendor != "" {
-			response["model_vendor"] = s.jobConfig.ModelVendor
+		if len(s.jobConfig.ModelVendors) > 0 {
+			response["model_vendors"] = s.jobConfig.ModelVendors
 		}
 	}
 

docs/integration-guide.md

@@ -78,9 +78,11 @@ author: 'Your Name'
 # The platform executes this command directly — no implicit runtime setup.
 entrypoint: 'node --enable-source-maps dist/index.js'
 
-# Optional: Specify the model vendor for model selection (e.g. 'Anthropic', 'OpenAI').
-# When set, the platform uses this to determine the available models for the engine.
-vendor: 'Anthropic'
+# Optional: Specify the model vendors for model selection (e.g. 'Anthropic', 'OpenAI').
+# When set, the platform uses these to determine the available models for the engine.
+vendors:
+  - 'Anthropic'
+  - 'OpenAI'
 ```
 
 > **Note:** This is not a GitHub Action. The platform reads `entrypoint` from `engine.yaml` and runs it directly. All paths in the entrypoint are resolved relative to the engine's root directory.
@@ -101,7 +103,7 @@ The platform injects these environment variables into the engine process at runt
 | `GITHUB_SELECTED_MODEL` | No | Model selected by the platform for this run. Only set when model selection is enabled. |
 | `GITHUB_DEFAULT_MODEL` | No | Default model for the selected engine. Only set when model selection is enabled. |
 | `GITHUB_AVAILABLE_MODELS` | No | JSON array of models the engine can choose from (e.g. `["claude-sonnet-4.5","claude-opus-4.1"]`). Only set when model selection is enabled. |
-| `GITHUB_MODEL_VENDOR` | No | Model vendor as defined by the `vendor` field in `engine.yaml` (e.g. `Anthropic`, `OpenAI`). Only set when model selection is enabled. |
+| `GITHUB_MODEL_VENDORS` | No | JSON array of model vendors as defined by the `vendors` field in `engine.yaml` (e.g. `["Anthropic","OpenAI"]`). Only set when model selection is enabled. |
 
 ## Step 2: Fetch Job Details
 
@@ -157,7 +159,7 @@ Headers:
   "selected_model": "claude-sonnet-4.5",
   "default_model": "claude-sonnet-4.5",
   "available_models": ["claude-sonnet-4.5", "claude-opus-4.1"],
-  "model_vendor": "Anthropic",
+  "model_vendors": ["Anthropic"],
   "mcp_proxy_url": "http://127.0.0.1:2301"
 }
 ```
@@ -176,7 +178,7 @@ Headers:
 | `selected_model` | Model selected by the platform for this run. Present when `features.model_selection` is `true`. |
 | `default_model` | Default model for the selected engine. Present when `features.model_selection` is `true`. |
 | `available_models` | List of models the engine can choose from. Present when `features.model_selection` is `true`. |
-| `model_vendor` | Model vendor as defined by the `vendor` field in `engine.yaml` (e.g. `Anthropic`, `OpenAI`). Present when `features.model_selection` is `true`. |
+| `model_vendors` | List of model vendors as defined by the `vendors` field in `engine.yaml` (e.g. `["Anthropic", "OpenAI"]`). Present when `features.model_selection` is `true`. |
 | `mcp_proxy_url` | Optional URL of the MCP proxy server. When present, use it to discover user-provided MCP servers. See [User-Provided MCP Servers](#user-provided-mcp-servers). |
 
 Use `GITHUB_INFERENCE_TOKEN` for model calls and `GITHUB_GIT_TOKEN` for git operations; those are bootstrap action inputs, not job response fields.

src/client.ts

@@ -491,8 +491,8 @@ export interface JobDetails {
     default_model?: string;
     /** Models the engine can choose from. Present when model selection is enabled. */
     available_models?: string[];
-    /** Model vendor for filtering (e.g. "Anthropic", "OpenAI"). Present when model selection is enabled. */
-    model_vendor?: string;
+    /** Model vendors for filtering (e.g. ["Anthropic", "OpenAI"]). Present when model selection is enabled. */
+    model_vendors?: string[];
     /** Feature flags enabled for this job. */
     features?: {
         /** Whether the platform has enabled model selection for this job. */