Add GitHub Copilot provider support

Author: jasnsy

apps/server/package.json

@@ -26,6 +26,7 @@
     "@anthropic-ai/claude-agent-sdk": "^0.2.77",
     "@effect/platform-node": "catalog:",
     "@effect/sql-sqlite-bun": "catalog:",
+    "@github/copilot-sdk": "^0.2.1",
     "@pierre/diffs": "^1.1.0-beta.16",
     "effect": "catalog:",
     "node-pty": "^1.1.0",

apps/server/src/doctor.ts

@@ -10,6 +10,7 @@ import { Effect } from "effect";
 import { Command } from "effect/unstable/cli";
 
 import {
+  checkCopilotProviderStatus,
   checkCodexProviderStatus,
   checkClaudeProviderStatus,
 } from "./provider/Layers/ProviderHealth";
@@ -32,6 +33,7 @@ const AUTH_LABELS: Record<string, string> = {
 const PROVIDER_LABELS: Record<string, string> = {
   codex: "Codex (OpenAI)",
   claudeAgent: "Claude (Anthropic)",
+  copilot: "GitHub Copilot",
 };
 
 function printStatus(status: ServerProviderStatus): void {
@@ -65,9 +67,12 @@ const doctorProgram = Effect.gen(function* () {
   console.log("");
   console.log("Checking provider health...");
 
-  const statuses = yield* Effect.all([checkCodexProviderStatus, checkClaudeProviderStatus], {
-    concurrency: "unbounded",
-  });
+  const statuses = yield* Effect.all(
+    [checkCodexProviderStatus, checkClaudeProviderStatus, checkCopilotProviderStatus],
+    {
+      concurrency: "unbounded",
+    },
+  );
 
   for (const status of statuses) {
     printStatus(status);
@@ -80,6 +85,7 @@ const doctorProgram = Effect.gen(function* () {
     console.log("");
     console.log("  Codex:  npm install -g @openai/codex && codex login");
     console.log("  Claude: npm install -g @anthropic-ai/claude-code && claude auth login");
+    console.log("  Copilot: npm install -g @github/copilot && copilot login");
   } else if (readyCount === statuses.length) {
     console.log("All providers are ready.");
   } else {