fix: isolate codex home in worktrees

server/src/__tests__/codex-local-skill-injection.test.ts

@@ -0,0 +1,91 @@
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+import { ensureCodexSkillsInjected } from "@paperclipai/adapter-codex-local/server";
+
+async function makeTempDir(prefix: string): Promise<string> {
+  return fs.mkdtemp(path.join(os.tmpdir(), prefix));
+}
+
+async function createPaperclipRepoSkill(root: string, skillName: string) {
+  await fs.mkdir(path.join(root, "server"), { recursive: true });
+  await fs.mkdir(path.join(root, "packages", "adapter-utils"), { recursive: true });
+  await fs.mkdir(path.join(root, "skills", skillName), { recursive: true });
+  await fs.writeFile(path.join(root, "pnpm-workspace.yaml"), "packages:\n  - packages/*\n", "utf8");
+  await fs.writeFile(path.join(root, "package.json"), '{"name":"paperclip"}\n', "utf8");
+  await fs.writeFile(
+    path.join(root, "skills", skillName, "SKILL.md"),
+    `---\nname: ${skillName}\n---\n`,
+    "utf8",
+  );
+}
+
+async function createCustomSkill(root: string, skillName: string) {
+  await fs.mkdir(path.join(root, "custom", skillName), { recursive: true });
+  await fs.writeFile(
+    path.join(root, "custom", skillName, "SKILL.md"),
+    `---\nname: ${skillName}\n---\n`,
+    "utf8",
+  );
+}
+
+describe("codex local adapter skill injection", () => {
+  const cleanupDirs = new Set<string>();
+
+  afterEach(async () => {
+    await Promise.all(Array.from(cleanupDirs).map((dir) => fs.rm(dir, { recursive: true, force: true })));
+    cleanupDirs.clear();
+  });
+
+  it("repairs a Codex Paperclip skill symlink that still points at another live checkout", async () => {
+    const currentRepo = await makeTempDir("paperclip-codex-current-");
+    const oldRepo = await makeTempDir("paperclip-codex-old-");
+    const skillsHome = await makeTempDir("paperclip-codex-home-");
+    cleanupDirs.add(currentRepo);
+    cleanupDirs.add(oldRepo);
+    cleanupDirs.add(skillsHome);
+
+    await createPaperclipRepoSkill(currentRepo, "paperclip");
+    await createPaperclipRepoSkill(oldRepo, "paperclip");
+    await fs.symlink(path.join(oldRepo, "skills", "paperclip"), path.join(skillsHome, "paperclip"));
+
+    const logs: string[] = [];
+    await ensureCodexSkillsInjected(
+      async (_stream, chunk) => {
+        logs.push(chunk);
+      },
+      {
+        skillsHome,
+        skillsEntries: [{ name: "paperclip", source: path.join(currentRepo, "skills", "paperclip") }],
+      },
+    );
+
+    expect(await fs.realpath(path.join(skillsHome, "paperclip"))).toBe(
+      await fs.realpath(path.join(currentRepo, "skills", "paperclip")),
+    );
+    expect(logs.some((line) => line.includes('Repaired Codex skill "paperclip"'))).toBe(true);
+  });
+
+  it("preserves a custom Codex skill symlink outside Paperclip repo checkouts", async () => {
+    const currentRepo = await makeTempDir("paperclip-codex-current-");
+    const customRoot = await makeTempDir("paperclip-codex-custom-");
+    const skillsHome = await makeTempDir("paperclip-codex-home-");
+    cleanupDirs.add(currentRepo);
+    cleanupDirs.add(customRoot);
+    cleanupDirs.add(skillsHome);
+
+    await createPaperclipRepoSkill(currentRepo, "paperclip");
+    await createCustomSkill(customRoot, "paperclip");
+    await fs.symlink(path.join(customRoot, "custom", "paperclip"), path.join(skillsHome, "paperclip"));
+
+    await ensureCodexSkillsInjected(async () => {}, {
+      skillsHome,
+      skillsEntries: [{ name: "paperclip", source: path.join(currentRepo, "skills", "paperclip") }],
+    });
+
+    expect(await fs.realpath(path.join(skillsHome, "paperclip"))).toBe(
+      await fs.realpath(path.join(customRoot, "custom", "paperclip")),
+    );
+  });
+});