fix: change default config from anthropic to openai

Default inkos init was generating anthropic config which doesn't work
with the OpenAI SDK runtime. Now defaults to openai provider with
commented Anthropic example in .env template.

packages/cli/src/commands/init.ts

@@ -18,10 +18,10 @@ export const initCommand = new Command("init")
         name,
         version: "0.1.0",
         llm: {
-          provider: "anthropic",
-          baseUrl: process.env.INKOS_LLM_BASE_URL ?? "https://api.anthropic.com/v1",
+          provider: process.env.INKOS_LLM_PROVIDER ?? "openai",
+          baseUrl: process.env.INKOS_LLM_BASE_URL ?? "https://api.openai.com/v1",
           apiKey: process.env.INKOS_LLM_API_KEY ?? "",
-          model: process.env.INKOS_LLM_MODEL ?? "claude-sonnet-4-5-20250514",
+          model: process.env.INKOS_LLM_MODEL ?? "gpt-4o",
         },
         notify: [],
         daemon: {
@@ -43,10 +43,17 @@ export const initCommand = new Command("init")
       await writeFile(
         join(projectDir, ".env"),
         [
-          "INKOS_LLM_PROVIDER=anthropic",
-          "INKOS_LLM_BASE_URL=https://api.anthropic.com/v1",
+          "# LLM Configuration",
+          "# Provider: openai (OpenAI / compatible proxy), anthropic (Anthropic native)",
+          "INKOS_LLM_PROVIDER=openai",
+          "INKOS_LLM_BASE_URL=https://api.openai.com/v1",
           "INKOS_LLM_API_KEY=your-api-key-here",
-          "INKOS_LLM_MODEL=claude-sonnet-4-5-20250514",
+          "INKOS_LLM_MODEL=gpt-4o",
+          "",
+          "# Anthropic example:",
+          "# INKOS_LLM_PROVIDER=anthropic",
+          "# INKOS_LLM_BASE_URL=https://api.anthropic.com",
+          "# INKOS_LLM_MODEL=claude-sonnet-4-5-20250514",
         ].join("\n"),
         "utf-8",
       );