diff --git a/.changeset/fix-expert-description-empty-string.md b/.changeset/fix-expert-description-empty-string.md
new file mode 100644
index 00000000..a2677ad0
--- /dev/null
+++ b/.changeset/fix-expert-description-empty-string.md
@@ -0,0 +1,5 @@
+---
+"@perstack/core": patch
+---
+
+fix: allow empty string for Expert description field
diff --git a/packages/core/src/schemas/expert.test.ts b/packages/core/src/schemas/expert.test.ts
index fa3b4c2f..e5c689e4 100644
--- a/packages/core/src/schemas/expert.test.ts
+++ b/packages/core/src/schemas/expert.test.ts
@@ -107,4 +107,15 @@ describe("@perstack/core: expertSchema", () => {
     expect(result.skills.interactive.type).toBe("interactiveSkill")
     expect(result.skills.interactive.name).toBe("interactive")
   })
+
+  it("accepts empty string for description", () => {
+    const result = expertSchema.parse({
+      key: "test-expert",
+      name: "test-expert",
+      version: "1.0.0",
+      instruction: "Test instruction",
+      description: "",
+    })
+    expect(result.description).toBe("")
+  })
 })
diff --git a/packages/core/src/schemas/expert.ts b/packages/core/src/schemas/expert.ts
index ac0defec..8dc71248 100644
--- a/packages/core/src/schemas/expert.ts
+++ b/packages/core/src/schemas/expert.ts
@@ -51,7 +51,6 @@ export const expertSchema = z.object({
   version: z.string().regex(expertVersionRegex),
   description: z
     .string()
-    .min(1)
     .max(1024 * 2)
     .optional(),
   instruction: z