diff --git a/src/commands/doctor-ui.ts b/src/commands/doctor-ui.ts
new file mode 100644
index 000000000..2cf8478a1
--- /dev/null
+++ b/src/commands/doctor-ui.ts
@@ -0,0 +1,84 @@
+import fs from "node:fs/promises";
+import path from "node:path";
+import { resolveClawdbotPackageRoot } from "../infra/clawdbot-root.js";
+import { runCommandWithTimeout } from "../process/exec.js";
+import type { RuntimeEnv } from "../runtime.js";
+import { note } from "../terminal/note.js";
+import type { DoctorPrompter } from "./doctor-prompter.js";
+
+export async function maybeRepairUiProtocolFreshness(
+  _runtime: RuntimeEnv,
+  prompter: DoctorPrompter,
+) {
+  const root = await resolveClawdbotPackageRoot({
+    moduleUrl: import.meta.url,
+    argv1: process.argv[1],
+    cwd: process.cwd(),
+  });
+
+  if (!root) return;
+
+  const schemaPath = path.join(root, "src/gateway/protocol/schema.ts");
+  const uiIndexPath = path.join(root, "dist/control-ui/index.html");
+
+  try {
+    const [schemaStats, uiStats] = await Promise.all([
+      fs.stat(schemaPath),
+      fs.stat(uiIndexPath),
+    ]);
+
+    if (schemaStats.mtime > uiStats.mtime) {
+      const uiMtimeIso = uiStats.mtime.toISOString();
+      // Find changes since the UI build
+      const gitLog = await runCommandWithTimeout(
+        [
+          "git",
+          "-C",
+          root,
+          "log",
+          `--since=${uiMtimeIso}`,
+          "--format=%h %s",
+          "src/gateway/protocol/schema.ts",
+        ],
+        { timeoutMs: 5000 },
+      ).catch(() => null);
+
+      if (gitLog?.stdout.trim()) {
+        note(
+          `UI assets are older than the protocol schema.\nFunctional changes since last build:\n${gitLog.stdout
+            .trim()
+            .split("\n")
+            .map((l) => `- ${l}`)
+            .join("\n")}`,
+          "UI Freshness",
+        );
+
+        const shouldRepair = await prompter.confirmAggressive({
+          message:
+            "Rebuild UI now? (Detected protocol mismatch requiring update)",
+          initialValue: true,
+        });
+
+        if (shouldRepair) {
+          note("Rebuilding stale UI assets... (this may take a moment)", "UI");
+          // Use scripts/ui.js to build, assuming node is available as we are running in it.
+          // We use the same node executable to run the script.
+          const uiScriptPath = path.join(root, "scripts/ui.js");
+          await runCommandWithTimeout(
+            [process.execPath, uiScriptPath, "build"],
+            {
+              cwd: root,
+              timeoutMs: 120_000,
+              env: { ...process.env, FORCE_COLOR: "1" },
+            },
+          );
+          note("UI rebuild complete.", "UI");
+        }
+      }
+    }
+  } catch (_err) {
+    // If files don't exist, we can't check.
+    // If git fails, we silently skip.
+    // runtime.debug(`UI freshness check failed: ${String(err)}`);
+  }
+}
diff --git a/src/commands/doctor.ts b/src/commands/doctor.ts
index d9fea75ed..09d6b6869 100644
--- a/src/commands/doctor.ts
+++ b/src/commands/doctor.ts
@@ -66,6 +66,7 @@ import {
   maybeMigrateLegacyConfigFile,
   normalizeLegacyConfigValues,
 } from "./doctor-legacy-config.js";
+import { maybeRepairUiProtocolFreshness } from "./doctor-ui.js";
 import { createDoctorPrompter, type DoctorOptions } from "./doctor-prompter.js";
 import {
   maybeRepairSandboxImages,
@@ -271,9 +272,9 @@ export async function doctorCommand(
       options.nonInteractive === true
         ? true
         : await prompter.confirm({
-            message: "Migrate legacy config entries now?",
-            initialValue: true,
-          });
+          message: "Migrate legacy config entries now?",
+          initialValue: true,
+        });
     if (migrate) {
       // Legacy migration (2026-01-02, commit: 16420e5b) — normalize per-provider allowlists; move WhatsApp gating into whatsapp.allowFrom.
       const { config: migrated, changes } = migrateLegacyConfig(
@@ -326,9 +327,9 @@ export async function doctorCommand(
           : options.nonInteractive === true
             ? false
             : await prompter.confirmRepair({
-                message: "Generate and configure a gateway token now?",
-                initialValue: true,
-              });
+              message: "Generate and configure a gateway token now?",
+              initialValue: true,
+            });
       if (shouldSetToken) {
         const nextToken = randomToken();
         cfg = {
@@ -354,9 +355,9 @@ export async function doctorCommand(
       options.nonInteractive === true
         ? true
         : await prompter.confirm({
-            message: "Migrate legacy state (sessions/agent/WhatsApp auth) now?",
-            initialValue: true,
-          });
+          message: "Migrate legacy state (sessions/agent/WhatsApp auth) now?",
+          initialValue: true,
+        });
     if (migrate) {
       const migrated = await runLegacyStateMigrations({
         detected: legacyState,
@@ -478,13 +479,11 @@ export async function doctorCommand(
   note(
     [
       `Eligible: ${skillsReport.skills.filter((s) => s.eligible).length}`,
-      `Missing requirements: ${
-        skillsReport.skills.filter(
-          (s) => !s.eligible && !s.disabled && !s.blockedByAllowlist,
-        ).length
+      `Missing requirements: ${skillsReport.skills.filter(
+        (s) => !s.eligible && !s.disabled && !s.blockedByAllowlist,
+      ).length
       }`,
-      `Blocked by allowlist: ${
-        skillsReport.skills.filter((s) => s.blockedByAllowlist).length
+      `Blocked by allowlist: ${skillsReport.skills.filter((s) => s.blockedByAllowlist).length
       }`,
     ].join("\n"),
     "Skills status",
@@ -494,10 +493,10 @@ export async function doctorCommand(
     config: cfg,
     workspaceDir,
     logger: {
-      info: () => {},
-      warn: () => {},
-      error: () => {},
-      debug: () => {},
+      info: () => { },
+      warn: () => { },
+      error: () => { },
+      debug: () => { },
     },
   });
   if (pluginRegistry.plugins.length > 0) {
@@ -513,9 +512,9 @@ export async function doctorCommand(
       `Errors: ${errored.length}`,
       errored.length > 0
         ? `- ${errored
-            .slice(0, 10)
-            .map((p) => p.id)
-            .join("\n- ")}${errored.length > 10 ? "\n- ..." : ""}`
+          .slice(0, 10)
+          .map((p) => p.id)
+          .join("\n- ")}${errored.length > 10 ? "\n- ..." : ""}`
         : null,
     ].filter((line): line is string => Boolean(line));