fix: address greptile follow-up

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

packages/adapters/codex-local/src/server/codex-home.ts

@@ -11,7 +11,7 @@ function nonEmpty(value: string | undefined): string | null {
   return typeof value === "string" && value.trim().length > 0 ? value.trim() : null;
 }
 
-async function pathExists(candidate: string): Promise<boolean> {
+export async function pathExists(candidate: string): Promise<boolean> {
   return fs.access(candidate).then(() => true).catch(() => false);
 }
 

packages/adapters/codex-local/src/server/execute.ts

@@ -21,7 +21,7 @@ import {
   runChildProcess,
 } from "@paperclipai/adapter-utils/server-utils";
 import { parseCodexJsonl, isCodexUnknownSessionError } from "./parse.js";
-import { prepareWorktreeCodexHome, resolveCodexHomeDir } from "./codex-home.js";
+import { pathExists, prepareWorktreeCodexHome, resolveCodexHomeDir } from "./codex-home.js";
 
 const __moduleDir = path.dirname(fileURLToPath(import.meta.url));
 const CODEX_ROLLOUT_NOISE_RE =
@@ -61,10 +61,6 @@ function resolveCodexBillingType(env: Record<string, string>): "api" | "subscrip
   return hasNonEmptyEnvValue(env, "OPENAI_API_KEY") ? "api" : "subscription";
 }
 
-async function pathExists(candidate: string): Promise<boolean> {
-  return fs.access(candidate).then(() => true).catch(() => false);
-}
-
 async function isLikelyPaperclipRepoRoot(candidate: string): Promise<boolean> {
   const [hasWorkspace, hasPackageJson, hasServerDir, hasAdapterUtilsDir] = await Promise.all([
     pathExists(path.join(candidate, "pnpm-workspace.yaml")),

packages/shared/src/validators/agent.ts

@@ -78,7 +78,10 @@ export const wakeAgentSchema = z.object({
   reason: z.string().optional().nullable(),
   payload: z.record(z.unknown()).optional().nullable(),
   idempotencyKey: z.string().optional().nullable(),
-  forceFreshSession: z.boolean().optional().default(false),
+  forceFreshSession: z.preprocess(
+    (value) => (value === null ? undefined : value),
+    z.boolean().optional().default(false),
+  ),
 });
 
 export type WakeAgent = z.infer<typeof wakeAgentSchema>;