diff --git a/Releases/v4.0.3/.claude/PAI-Install/engine/validate.ts b/Releases/v4.0.3/.claude/PAI-Install/engine/validate.ts
index b744a7aa0..fb318ad18 100644
--- a/Releases/v4.0.3/.claude/PAI-Install/engine/validate.ts
+++ b/Releases/v4.0.3/.claude/PAI-Install/engine/validate.ts
@@ -107,7 +107,7 @@ export async function runValidation(state: InstallState): Promise<ValidationChec
   }
 
   // 4. PAI skill present
-  const skillPath = join(paiDir, "skills", "PAI", "SKILL.md");
+  const skillPath = join(paiDir, "PAI", "SKILL.md");
   checks.push({
     name: "PAI core skill",
     passed: existsSync(skillPath),