refactor(ai): register api providers

packages/ai/src/env-api-keys.ts

@@ -0,0 +1,113 @@
+// NEVER convert to top-level imports - breaks browser/Vite builds (web-ui)
+let _existsSync: typeof import("node:fs").existsSync | null = null;
+let _homedir: typeof import("node:os").homedir | null = null;
+let _join: typeof import("node:path").join | null = null;
+
+// Eagerly load in Node.js/Bun environment only
+if (typeof process !== "undefined" && (process.versions?.node || process.versions?.bun)) {
+	import("node:fs").then((m) => {
+		_existsSync = m.existsSync;
+	});
+	import("node:os").then((m) => {
+		_homedir = m.homedir;
+	});
+	import("node:path").then((m) => {
+		_join = m.join;
+	});
+}
+
+import type { KnownProvider } from "./types.js";
+
+let cachedVertexAdcCredentialsExists: boolean | null = null;
+
+function hasVertexAdcCredentials(): boolean {
+	if (cachedVertexAdcCredentialsExists === null) {
+		// In browser or if node modules not loaded yet, return false
+		if (!_existsSync || !_homedir || !_join) {
+			cachedVertexAdcCredentialsExists = false;
+			return false;
+		}
+
+		// Check GOOGLE_APPLICATION_CREDENTIALS env var first (standard way)
+		const gacPath = process.env.GOOGLE_APPLICATION_CREDENTIALS;
+		if (gacPath) {
+			cachedVertexAdcCredentialsExists = _existsSync(gacPath);
+		} else {
+			// Fall back to default ADC path (lazy evaluation)
+			cachedVertexAdcCredentialsExists = _existsSync(
+				_join(_homedir(), ".config", "gcloud", "application_default_credentials.json"),
+			);
+		}
+	}
+	return cachedVertexAdcCredentialsExists;
+}
+
+/**
+ * Get API key for provider from known environment variables, e.g. OPENAI_API_KEY.
+ *
+ * Will not return API keys for providers that require OAuth tokens.
+ */
+export function getEnvApiKey(provider: KnownProvider): string | undefined;
+export function getEnvApiKey(provider: string): string | undefined;
+export function getEnvApiKey(provider: any): string | undefined {
+	// Fall back to environment variables
+	if (provider === "github-copilot") {
+		return process.env.COPILOT_GITHUB_TOKEN || process.env.GH_TOKEN || process.env.GITHUB_TOKEN;
+	}
+
+	// ANTHROPIC_OAUTH_TOKEN takes precedence over ANTHROPIC_API_KEY
+	if (provider === "anthropic") {
+		return process.env.ANTHROPIC_OAUTH_TOKEN || process.env.ANTHROPIC_API_KEY;
+	}
+
+	// Vertex AI uses Application Default Credentials, not API keys.
+	// Auth is configured via `gcloud auth application-default login`.
+	if (provider === "google-vertex") {
+		const hasCredentials = hasVertexAdcCredentials();
+		const hasProject = !!(process.env.GOOGLE_CLOUD_PROJECT || process.env.GCLOUD_PROJECT);
+		const hasLocation = !!process.env.GOOGLE_CLOUD_LOCATION;
+
+		if (hasCredentials && hasProject && hasLocation) {
+			return "<authenticated>";
+		}
+	}
+
+	if (provider === "amazon-bedrock") {
+		// Amazon Bedrock supports multiple credential sources:
+		// 1. AWS_PROFILE - named profile from ~/.aws/credentials
+		// 2. AWS_ACCESS_KEY_ID + AWS_SECRET_ACCESS_KEY - standard IAM keys
+		// 3. AWS_BEARER_TOKEN_BEDROCK - Bedrock API keys (bearer token)
+		// 4. AWS_CONTAINER_CREDENTIALS_RELATIVE_URI - ECS task roles
+		// 5. AWS_CONTAINER_CREDENTIALS_FULL_URI - ECS task roles (full URI)
+		// 6. AWS_WEB_IDENTITY_TOKEN_FILE - IRSA (IAM Roles for Service Accounts)
+		if (
+			process.env.AWS_PROFILE ||
+			(process.env.AWS_ACCESS_KEY_ID && process.env.AWS_SECRET_ACCESS_KEY) ||
+			process.env.AWS_BEARER_TOKEN_BEDROCK ||
+			process.env.AWS_CONTAINER_CREDENTIALS_RELATIVE_URI ||
+			process.env.AWS_CONTAINER_CREDENTIALS_FULL_URI ||
+			process.env.AWS_WEB_IDENTITY_TOKEN_FILE
+		) {
+			return "<authenticated>";
+		}
+	}
+
+	const envMap: Record<string, string> = {
+		openai: "OPENAI_API_KEY",
+		"azure-openai-responses": "AZURE_OPENAI_API_KEY",
+		google: "GEMINI_API_KEY",
+		groq: "GROQ_API_KEY",
+		cerebras: "CEREBRAS_API_KEY",
+		xai: "XAI_API_KEY",
+		openrouter: "OPENROUTER_API_KEY",
+		"vercel-ai-gateway": "AI_GATEWAY_API_KEY",
+		zai: "ZAI_API_KEY",
+		mistral: "MISTRAL_API_KEY",
+		minimax: "MINIMAX_API_KEY",
+		"minimax-cn": "MINIMAX_CN_API_KEY",
+		opencode: "OPENCODE_API_KEY",
+	};
+
+	const envVar = envMap[provider];
+	return envVar ? process.env[envVar] : undefined;
+}