fix: tighten Windows adapter command handling

packages/adapter-utils/src/server-utils.ts

@@ -136,7 +136,7 @@ function windowsPathExts(env: NodeJS.ProcessEnv): string[] {
 
 async function pathExists(candidate: string) {
   try {
-    await fs.access(candidate, fsConstants.X_OK);
+    await fs.access(candidate, process.platform === "win32" ? fsConstants.F_OK : fsConstants.X_OK);
     return true;
   } catch {
     return false;
@@ -173,7 +173,7 @@ async function resolveCommandPath(command: string, cwd: string, env: NodeJS.Proc
 
 function quoteForCmd(arg: string) {
   if (!arg.length) return '""';
-  const escaped = arg.replace(/"/g, '""').replace(/%/g, "%%");
+  const escaped = arg.replace(/"/g, '""');
   return /[\s"&<>|^()]/.test(escaped) ? `"${escaped}"` : escaped;
 }
 

pnpm-lock.yaml

@@ -321,6 +321,9 @@ importers:
       '@types/ws':
         specifier: ^8.18.1
         version: 8.18.1
+      cross-env:
+        specifier: ^10.1.0
+        version: 10.1.0
       supertest:
         specifier: ^7.0.0
         version: 7.2.2
@@ -8930,6 +8933,14 @@ snapshots:
       chai: 5.3.3
       tinyrainbow: 2.0.0
 
+  '@vitest/mocker@3.2.4(vite@7.3.1(@types/node@24.12.0)(jiti@2.6.1)(lightningcss@1.30.2)(tsx@4.21.0))':
+    dependencies:
+      '@vitest/spy': 3.2.4
+      estree-walker: 3.0.3
+      magic-string: 0.30.21
+    optionalDependencies:
+      vite: 7.3.1(@types/node@24.12.0)(jiti@2.6.1)(lightningcss@1.30.2)(tsx@4.21.0)
+
   '@vitest/mocker@3.2.4(vite@7.3.1(@types/node@25.2.3)(jiti@2.6.1)(lightningcss@1.30.2)(tsx@4.21.0))':
     dependencies:
       '@vitest/spy': 3.2.4
@@ -11707,7 +11718,7 @@ snapshots:
     dependencies:
       '@types/chai': 5.2.3
       '@vitest/expect': 3.2.4
-      '@vitest/mocker': 3.2.4(vite@7.3.1(@types/node@25.2.3)(jiti@2.6.1)(lightningcss@1.30.2)(tsx@4.21.0))
+      '@vitest/mocker': 3.2.4(vite@7.3.1(@types/node@24.12.0)(jiti@2.6.1)(lightningcss@1.30.2)(tsx@4.21.0))
       '@vitest/pretty-format': 3.2.4
       '@vitest/runner': 3.2.4
       '@vitest/snapshot': 3.2.4

server/package.json

@@ -61,6 +61,7 @@
     "@types/node": "^24.6.0",
     "@types/supertest": "^6.0.2",
     "@types/ws": "^8.18.1",
+    "cross-env": "^10.1.0",
     "supertest": "^7.0.0",
     "tsx": "^4.19.2",
     "typescript": "^5.7.3",

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

@@ -4,6 +4,8 @@ import os from "node:os";
 import path from "node:path";
 import { testEnvironment } from "@paperclipai/adapter-codex-local/server";
 
+const itWindows = process.platform === "win32" ? it : it.skip;
+
 describe("codex_local environment diagnostics", () => {
   it("creates a missing working directory when cwd is absolute", async () => {
     const cwd = path.join(
@@ -30,9 +32,7 @@ describe("codex_local environment diagnostics", () => {
     await fs.rm(path.dirname(cwd), { recursive: true, force: true });
   });
 
-  it("runs the hello probe when Codex is available via a Windows .cmd wrapper", async () => {
-    if (process.platform !== "win32") return;
-
+  itWindows("runs the hello probe when Codex is available via a Windows .cmd wrapper", async () => {
     const root = path.join(
       os.tmpdir(),
       `paperclip-codex-local-probe-${Date.now()}-${Math.random().toString(16).slice(2)}`,