feat: add Arcee AI provider plugin

Add a bundled Arcee AI provider plugin with ARCEEAI_API_KEY onboarding,
Trinity model catalog (mini, large-preview, large-thinking), and
OpenAI-compatible API support.

- Trinity Large Thinking: 256K context, reasoning enabled
- Trinity Large Preview: 128K context, general-purpose
- Trinity Mini 26B: 128K context, fast and cost-efficient

src/agents/model-catalog.ts

@@ -44,7 +44,7 @@ const defaultImportPiSdk = () => import("./pi-model-discovery-runtime.js");
 let importPiSdk = defaultImportPiSdk;
 let modelSuppressionPromise: Promise<typeof import("./model-suppression.runtime.js")> | undefined;
 
-const NON_PI_NATIVE_MODEL_PROVIDERS = new Set(["deepseek", "kilocode", "ollama"]);
+const NON_PI_NATIVE_MODEL_PROVIDERS = new Set(["arcee", "deepseek", "kilocode", "ollama"]);
 
 function shouldLogModelCatalogTiming(): boolean {
   return process.env.OPENCLAW_DEBUG_INGRESS_TIMING === "1";

src/commands/onboard-types.ts

@@ -12,6 +12,7 @@ export type BuiltInAuthChoice =
   | "oauth"
   | "setup-token"
   | "token"
+  | "arceeai-api-key"
   | "chutes"
   | "deepseek-api-key"
   | "openai-codex"
@@ -65,6 +66,7 @@ export type AuthChoice = BuiltInAuthChoice | (string & {});
 export type BuiltInAuthChoiceGroupId =
   | "openai"
   | "anthropic"
+  | "arcee"
   | "chutes"
   | "deepseek"
   | "google"
@@ -131,6 +133,7 @@ export type OnboardOptions = OnboardDynamicProviderOptions & {
   tokenExpiresIn?: string;
   /** API key persistence mode for setup flows (default: plaintext). */
   secretInputMode?: SecretInputMode;
+  arceeaiApiKey?: string;
   cloudflareAiGatewayAccountId?: string;
   cloudflareAiGatewayGatewayId?: string;
   customBaseUrl?: string;

src/config/io.ts

@@ -73,6 +73,7 @@ export { MissingEnvVarError } from "./env-substitution.js";
 const SHELL_ENV_EXPECTED_KEYS = [
   "OPENAI_API_KEY",
   "ANTHROPIC_API_KEY",
+  "ARCEEAI_API_KEY",
   "DEEPSEEK_API_KEY",
   "ANTHROPIC_OAUTH_TOKEN",
   "GEMINI_API_KEY",