diff --git a/src/plugins/loader.test.ts b/src/plugins/loader.test.ts
index 86678c8f46d4..9e02352075e9 100644
--- a/src/plugins/loader.test.ts
+++ b/src/plugins/loader.test.ts
@@ -2789,6 +2789,61 @@ module.exports = { id: "throws-after-import", register() {} };`,
     clearInternalHooks();
   });
 
+  it("isolates unreadable definition reload metadata without dropping healthy plugins", () => {
+    useNoBundledPlugins();
+    const badPlugin = writePlugin({
+      id: "bad-definition-reload",
+      filename: "bad-definition-reload.cjs",
+      body: `module.exports = {
+        id: "bad-definition-reload",
+        reload: Object.defineProperty({}, "restartPrefixes", {
+          get() {
+            throw new Error("definition reload restart prefixes exploded");
+          },
+        }),
+        register() {
+          globalThis.badDefinitionReloadRegistered = true;
+        },
+      };`,
+    });
+    const healthyPlugin = writePlugin({
+      id: "healthy-after-bad-reload",
+      filename: "healthy-after-bad-reload.cjs",
+      body: `module.exports = {
+        id: "healthy-after-bad-reload",
+        register() {
+          globalThis.healthyAfterBadReloadRegistered = true;
+        },
+      };`,
+    });
+    const globals = globalThis as Record<string, unknown>;
+    delete globals.badDefinitionReloadRegistered;
+    delete globals.healthyAfterBadReloadRegistered;
+
+    const registry = loadOpenClawPlugins({
+      cache: false,
+      config: {
+        plugins: {
+          load: { paths: [badPlugin.file, healthyPlugin.file] },
+          allow: [badPlugin.id, healthyPlugin.id],
+        },
+      },
+      onlyPluginIds: [badPlugin.id, healthyPlugin.id],
+    });
+
+    expect(registry.plugins.find((entry) => entry.id === badPlugin.id)?.status).toBe("error");
+    expect(registry.plugins.find((entry) => entry.id === healthyPlugin.id)?.status).toBe("loaded");
+    expect(globals.badDefinitionReloadRegistered).toBeUndefined();
+    expect(globals.healthyAfterBadReloadRegistered).toBe(true);
+    expect(registry.reloads).toStrictEqual([]);
+    expectDiagnosticContaining({
+      registry,
+      level: "error",
+      pluginId: badPlugin.id,
+      message: "definition reload restart prefixes exploded",
+    });
+  });
+
   it("rolls back global side effects when registration fails", async () => {
     useNoBundledPlugins();
     const plugin = writePlugin({
diff --git a/src/plugins/loader.ts b/src/plugins/loader.ts
index 6d3a0ff529d7..7ed5f7d7e62c 100644
--- a/src/plugins/loader.ts
+++ b/src/plugins/loader.ts
@@ -2642,14 +2642,32 @@ export function loadOpenClawPlugins(options: PluginLoadOptions = {}): PluginRegi
       }
 
       if (registrationPlan.runFullActivationOnlyRegistrations) {
-        if (definition?.reload) {
-          registerReload(record, definition.reload);
-        }
-        for (const nodeHostCommand of definition?.nodeHostCommands ?? []) {
-          registerNodeHostCommand(record, nodeHostCommand);
-        }
-        for (const collector of definition?.securityAuditCollectors ?? []) {
-          registerSecurityAuditCollector(record, collector);
+        const registrySnapshot = snapshotPluginRegistry(registry);
+        try {
+          if (definition?.reload) {
+            registerReload(record, definition.reload);
+          }
+          for (const nodeHostCommand of definition?.nodeHostCommands ?? []) {
+            registerNodeHostCommand(record, nodeHostCommand);
+          }
+          for (const collector of definition?.securityAuditCollectors ?? []) {
+            registerSecurityAuditCollector(record, collector);
+          }
+        } catch (err) {
+          restorePluginRegistry(registry, registrySnapshot);
+          recordPluginError({
+            logger,
+            registry,
+            record,
+            seenIds,
+            pluginId,
+            origin: candidate.origin,
+            phase: "load",
+            error: err,
+            logPrefix: `[plugins] ${record.id} failed to register plugin definition metadata from ${record.source}: `,
+            diagnosticMessagePrefix: "failed to register plugin definition metadata: ",
+          });
+          continue;
         }
       }