Keep Copilot installer contracts complete in the runtime partition

Include the server lifecycle shim with its package tests. Retain extended native-session coverage in the following regression partition so each review stays below 100 files.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/paperclip-runner/src/native-session-runtime.test.ts

@@ -1,5 +1,4 @@
 import { createHash } from "node:crypto";
-import { resolveQualifiedAcpxProfile } from "./drivers/acpx/qualified-profiles.js";
 import { describe, expect, it, vi } from "vitest";
 
 import type { ControlPlanePort } from "./contracts/control-plane-port.js";
@@ -5005,19 +5004,7 @@ describe("executeNativeSession recovery", () => {
     expect(attachRun).not.toHaveBeenCalled();
   });
 
-  it.each(["codex", "copilot"] as const)("quarantines a retained %s session when attachment partially mutates then fails", async (provider) => {
-    const qualified = resolveQualifiedAcpxProfile("copilot", "selected-model");
-    const executionInput: NativeExecutionInputV1 = provider === "copilot" ? {
-      ...input,
-      session: { ...input.session, driverKind: "acpx_runtime" },
-      provider: { kind: "acpx", agent: "copilot", model: "selected-model", permissionPolicy: "interactive", profile: {
-        driverKind: qualified.driverKind, protocolVersion: qualified.protocolVersion, acpxVersion: qualified.acpxVersion,
-        agent: qualified.agent, agentProfileVersion: qualified.agentProfileVersion,
-        agentServerPackage: qualified.agentServerPackage, agentServerVersion: qualified.agentServerVersion,
-        agentRuntimePackage: qualified.agentRuntimePackage, agentRuntimeVersion: qualified.agentRuntimeVersion,
-        commandDigest: qualified.commandDigest,
-      } },
-    } : input;
+  it("quarantines a retained session when attachment partially mutates then fails", async () => {
     const attachmentFailure = new Error("provider attachment failed");
     const openRun = vi.fn(async () => undefined);
     let retainedIdentity = { ...identity, runId: "run-previous" };
@@ -5054,7 +5041,7 @@ describe("executeNativeSession recovery", () => {
       async descriptor() {
         return {
           kind: "mock",
-          name: `attachment-failure-backend-${provider}`,
+          name: "attachment-failure-backend",
           version: "1",
           capabilities: {
             resume: true,
@@ -5082,7 +5069,7 @@ describe("executeNativeSession recovery", () => {
 
     await expect(
       executeNativeSession({
-        input: executionInput,
+        input,
         backend,
         controlPlane: port,
         runnerInstanceId: "runner-recovery",
@@ -5091,9 +5078,7 @@ describe("executeNativeSession recovery", () => {
         onSession,
       }),
     ).rejects.toBe(attachmentFailure);
-    expect(attachRun).toHaveBeenCalledWith(provider === "copilot"
-      ? { identity, currentRunGrant: { runtimeContext: null, instructions: expect.any(String) } }
-      : { identity });
+    expect(attachRun).toHaveBeenCalledWith({ identity });
     expect(retainedIdentity).toEqual(identity);
     expect(onSession).toHaveBeenCalledOnce();
     expect(onSession).toHaveBeenCalledWith(null);

server/scripts/install-copilot-assets.mjs

@@ -0,0 +1,18 @@
+import { access } from "node:fs/promises";
+import { fileURLToPath } from "node:url";
+
+const installer = new URL("../dist/install-copilot-assets.mjs", import.meta.url);
+try {
+  await access(fileURLToPath(installer));
+} catch (error) {
+  if (error.code !== "ENOENT") throw error;
+  // Dependencies install before compilation in a source workspace. Published
+  // server packages omit src and cannot take this bootstrap exception.
+  await access(fileURLToPath(new URL("../src/services/copilot-connection-probe.ts", import.meta.url)));
+  await access(fileURLToPath(new URL("../../pnpm-workspace.yaml", import.meta.url)));
+  process.stdout.write("Copilot runtime assets: source-workspace-pending-build\n");
+  process.exit(0);
+}
+const { installCopilotAssets } = await import(installer.href);
+const result = await installCopilotAssets();
+process.stdout.write(`Copilot runtime assets: ${result.status} (${result.target})\n`);