feat(adapters): add Gemini CLI local adapter support

Signed-off-by: Aditya Sasidhar <telikicherlaadityasasidhar@gmail.com>

server/src/__tests__/gemini-local-adapter-environment.test.ts

@@ -0,0 +1,91 @@
+import { describe, expect, it } from "vitest";
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import { testEnvironment } from "@paperclipai/adapter-gemini-local/server";
+
+async function writeFakeGeminiCommand(binDir: string, argsCapturePath: string): Promise<string> {
+  const commandPath = path.join(binDir, "gemini");
+  const script = `#!/usr/bin/env node
+const fs = require("node:fs");
+const outPath = process.env.PAPERCLIP_TEST_ARGS_PATH;
+if (outPath) {
+  fs.writeFileSync(outPath, JSON.stringify(process.argv.slice(2)), "utf8");
+}
+console.log(JSON.stringify({
+  type: "assistant",
+  message: { content: [{ type: "output_text", text: "hello" }] },
+}));
+console.log(JSON.stringify({
+  type: "result",
+  subtype: "success",
+  result: "hello",
+}));
+`;
+  await fs.writeFile(commandPath, script, "utf8");
+  await fs.chmod(commandPath, 0o755);
+  return commandPath;
+}
+
+describe("gemini_local environment diagnostics", () => {
+  it("creates a missing working directory when cwd is absolute", async () => {
+    const cwd = path.join(
+      os.tmpdir(),
+      `paperclip-gemini-local-cwd-${Date.now()}-${Math.random().toString(16).slice(2)}`,
+      "workspace",
+    );
+
+    await fs.rm(path.dirname(cwd), { recursive: true, force: true });
+
+    const result = await testEnvironment({
+      companyId: "company-1",
+      adapterType: "gemini_local",
+      config: {
+        command: process.execPath,
+        cwd,
+      },
+    });
+
+    expect(result.checks.some((check) => check.code === "gemini_cwd_valid")).toBe(true);
+    expect(result.checks.some((check) => check.level === "error")).toBe(false);
+    const stats = await fs.stat(cwd);
+    expect(stats.isDirectory()).toBe(true);
+    await fs.rm(path.dirname(cwd), { recursive: true, force: true });
+  });
+
+  it("passes model and yolo flags to the hello probe", async () => {
+    const root = path.join(
+      os.tmpdir(),
+      `paperclip-gemini-local-probe-${Date.now()}-${Math.random().toString(16).slice(2)}`,
+    );
+    const binDir = path.join(root, "bin");
+    const cwd = path.join(root, "workspace");
+    const argsCapturePath = path.join(root, "args.json");
+    await fs.mkdir(binDir, { recursive: true });
+    await writeFakeGeminiCommand(binDir, argsCapturePath);
+
+    const result = await testEnvironment({
+      companyId: "company-1",
+      adapterType: "gemini_local",
+      config: {
+        command: "gemini",
+        cwd,
+        model: "gemini-2.5-pro",
+        yolo: true,
+        env: {
+          GEMINI_API_KEY: "test-key",
+          PAPERCLIP_TEST_ARGS_PATH: argsCapturePath,
+          PATH: `${binDir}${path.delimiter}${process.env.PATH ?? ""}`,
+        },
+      },
+    });
+
+    expect(result.status).not.toBe("fail");
+    const args = JSON.parse(await fs.readFile(argsCapturePath, "utf8")) as string[];
+    expect(args).toContain("--model");
+    expect(args).toContain("gemini-2.5-pro");
+    expect(args).toContain("--approval-mode");
+    expect(args).toContain("yolo");
+    await fs.rm(root, { recursive: true, force: true });
+  });
+});