Default onboarding to Copilot inside Copilot CLI

Detect Copilot CLI environment markers during first-run setup so pressing Enter wires the current agent instead of the historical Claude Code default.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Ross Story

src/cli/onboarding.ts

@@ -83,6 +83,15 @@ export function buildAgentOptions(): { value: string; label: string; hint?: stri
   ];
 }
 
+export function getInitialAgentValues(
+  env: Record<string, string | undefined> = process.env,
+): string[] {
+  if (env["COPILOT_CLI"] === "1" || env["COPILOT_AGENT_SESSION_ID"]) {
+    return ["copilot-cli"];
+  }
+  return ["claude-code"];
+}
+
 // Mirror src/cli.ts findEnvExample so onboarding ships the same .env
 // skeleton whether called directly or via `agentmemory init`. We
 // duplicate (rather than import) so the onboarding module doesn't
@@ -154,7 +163,7 @@ export async function runOnboarding(): Promise<OnboardingResult> {
     message: "Which agents will use agentmemory? (space to toggle, enter to confirm)",
     options: buildAgentOptions(),
     required: false,
-    initialValues: ["claude-code"],
+    initialValues: getInitialAgentValues(),
   });
   if (p.isCancel(agentsPicked)) {
     p.cancel("Setup cancelled. Re-run any time with: agentmemory --reset");

test/onboarding.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, it } from "vitest";
 
-import { buildAgentOptions } from "../src/cli/onboarding.js";
+import { buildAgentOptions, getInitialAgentValues } from "../src/cli/onboarding.js";
 
 describe("first-run onboarding", () => {
   it("offers GitHub Copilot CLI as a native setup target", () => {
@@ -15,4 +15,13 @@ describe("first-run onboarding", () => {
       ]),
     );
   });
+
+  it("selects GitHub Copilot CLI by default when running inside Copilot CLI", () => {
+    expect(getInitialAgentValues({ COPILOT_CLI: "1" })).toEqual(["copilot-cli"]);
+    expect(getInitialAgentValues({ COPILOT_AGENT_SESSION_ID: "session" })).toEqual(["copilot-cli"]);
+  });
+
+  it("keeps Claude Code as the default outside known agent environments", () => {
+    expect(getInitialAgentValues({})).toEqual(["claude-code"]);
+  });
 });