diff --git a/scripts/plugin-sdk-surface-report.mjs b/scripts/plugin-sdk-surface-report.mjs
index 8254461d4a51..c17da9858537 100644
--- a/scripts/plugin-sdk-surface-report.mjs
+++ b/scripts/plugin-sdk-surface-report.mjs
@@ -203,9 +203,25 @@ function hasDeprecatedTag(symbol) {
   return symbol.getJsDocTags().some((tag) => tag.name === "deprecated");
 }
 
+const generatedLlmCoreValidatorExports = new Set(["validateToolArguments", "validateToolCall"]);
+
+function isGeneratedLlmCoreValidatorDeclaration(exportName, declaration) {
+  if (!generatedLlmCoreValidatorExports.has(exportName)) {
+    return false;
+  }
+  const relative = path.relative(repoRoot, declaration.getSourceFile().fileName);
+  const relativePath = relative.split(path.sep).join(path.posix.sep);
+  // Build artifacts can make agent-core's package-name validator reexports look
+  // newly callable. Keep this source report independent of generated dist state.
+  return relativePath.includes("llm-core/dist/validation.d.");
+}
+
 function isCallableExport(checker, symbol, sourceFile) {
   const target = unwrapAlias(checker, symbol);
   const declaration = target.valueDeclaration ?? target.declarations?.[0] ?? sourceFile;
+  if (isGeneratedLlmCoreValidatorDeclaration(symbol.getName(), declaration)) {
+    return false;
+  }
   const type = checker.getTypeOfSymbolAtLocation(target, declaration);
   return checker.getSignaturesOfType(type, ts.SignatureKind.Call).length > 0;
 }
diff --git a/test/scripts/plugin-sdk-surface-report.test.ts b/test/scripts/plugin-sdk-surface-report.test.ts
index 50b4e99e3420..74abfd4fd186 100644
--- a/test/scripts/plugin-sdk-surface-report.test.ts
+++ b/test/scripts/plugin-sdk-surface-report.test.ts
@@ -49,6 +49,15 @@ describe("plugin SDK surface report", () => {
     expect(result.stderr).toBe("");
   });
 
+  it("keeps generated package declarations out of source surface counts", () => {
+    const result = runSurfaceReport({
+      OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_FUNCTION_EXPORTS: "5186",
+    });
+
+    expect(result.status).toBe(1);
+    expect(result.stderr).toContain("public callable exports 5187 > 5186");
+  });
+
   it("rejects deprecated export growth by public entrypoint", () => {
     const result = runSurfaceReport({
       OPENCLAW_PLUGIN_SDK_MAX_PUBLIC_DEPRECATED_EXPORTS_BY_ENTRYPOINT: JSON.stringify({ core: 1 }),