fix: handle BM error responses in schema-validate tool

When BM returns {error: 'No schema found...'}, the plugin crashed with
'Cannot read properties of undefined (reading length)' because it
assumed the response always had results/valid_count/etc.

Now checks for error responses first and returns them cleanly.
Also guards against undefined results array.

Author: bm-clawd

tools/schema-validate.test.ts

@@ -117,6 +117,18 @@ describe("schema-validate tool", () => {
       )
     })
 
+    it("should handle BM error response (no schema found)", async () => {
+      ;(
+        mockClient.schemaValidate as jest.MockedFunction<any>
+      ).mockResolvedValue({
+        error: "No schema found for type 'Task'",
+      })
+
+      const result = await execute("call-1", { noteType: "Task" })
+
+      expect(result.content[0].text).toContain("No schema found")
+    })
+
     it("should handle errors gracefully", async () => {
       ;(
         mockClient.schemaValidate as jest.MockedFunction<any>

tools/schema-validate.ts

@@ -48,15 +48,22 @@ export function registerSchemaValidateTool(
             params.project,
           )
 
+          // Handle error responses from BM (e.g., no schema found)
+          if ("error" in result && typeof (result as any).error === "string") {
+            return {
+              content: [{ type: "text" as const, text: (result as any).error }],
+            }
+          }
+
           const lines: string[] = []
           if (result.entity_type) {
             lines.push(`**Type:** ${result.entity_type}`)
           }
           lines.push(
-            `**Notes:** ${result.total_notes} | **Valid:** ${result.valid_count} | **Warnings:** ${result.warning_count} | **Errors:** ${result.error_count}`,
+            `**Notes:** ${result.total_notes ?? 0} | **Valid:** ${result.valid_count ?? 0} | **Warnings:** ${result.warning_count ?? 0} | **Errors:** ${result.error_count ?? 0}`,
           )
 
-          if (result.results.length > 0) {
+          if (result.results && result.results.length > 0) {
             lines.push("")
             for (const r of result.results) {
               const status = r.valid ? "valid" : "invalid"