feat: Add auth command to handle GitHub token setup

Author: ericc-ch

src/auth.ts

@@ -0,0 +1,43 @@
+#!/usr/bin/env node
+
+import { defineCommand } from "citty"
+import consola from "consola"
+
+import { PATHS } from "./lib/paths"
+import { setupGitHubToken } from "./lib/token"
+
+interface RunAuthOptions {
+  verbose: boolean
+}
+
+export async function runAuth(options: RunAuthOptions): Promise<void> {
+  if (options.verbose) {
+    consola.level = 5
+    consola.info("Verbose logging enabled")
+  }
+
+  await setupGitHubToken()
+  consola.success("GitHub token written to", PATHS.GITHUB_TOKEN_PATH)
+
+  process.exit(0)
+}
+
+export const auth = defineCommand({
+  meta: {
+    name: "auth",
+    description: "Run GitHub auth flow without running the server",
+  },
+  args: {
+    verbose: {
+      alias: "v",
+      type: "boolean",
+      default: false,
+      description: "Enable verbose logging",
+    },
+  },
+  run({ args }) {
+    return runAuth({
+      verbose: args.verbose,
+    })
+  },
+})

src/main.ts

@@ -4,6 +4,7 @@ import { defineCommand, runMain } from "citty"
 import consola from "consola"
 import { serve, type ServerHandler } from "srvx"
 
+import { auth } from "./auth"
 import { cacheModels } from "./lib/models"
 import { ensurePaths } from "./lib/paths"
 import { state } from "./lib/state"
@@ -51,6 +52,12 @@ export async function runServer(options: RunServerOptions): Promise<void> {
 }
 
 const main = defineCommand({
+  meta: {
+    name: "copilot-api",
+    description:
+      "A wrapper around GitHub Copilot API to make it OpenAI compatible, making it usable for other tools.",
+  },
+  subCommands: { auth },
   args: {
     port: {
       alias: "p",