diff --git a/src/cli/cron-cli.ts b/src/cli/cron-cli.ts
index 072676121..3b2958f28 100644
--- a/src/cli/cron-cli.ts
+++ b/src/cli/cron-cli.ts
@@ -1,8 +1,8 @@
 import chalk from "chalk";
 import type { Command } from "commander";
+import type { CronJob, CronSchedule } from "../cron/types.js";
 import { danger } from "../globals.js";
 import { defaultRuntime } from "../runtime.js";
-import type { CronJob, CronSchedule } from "../cron/types.js";
 import type { GatewayRpcOpts } from "./gateway-rpc.js";
 import { addGatewayClientOptions, callGatewayFromCli } from "./gateway-rpc.js";
 
@@ -122,8 +122,11 @@ const formatStatus = (job: CronJob) => {
   return job.state.lastStatus ?? "idle";
 };
 
-const colorize = (rich: boolean, color: (msg: string) => string, msg: string) =>
-  rich ? color(msg) : msg;
+const colorize = (
+  rich: boolean,
+  color: (msg: string) => string,
+  msg: string,
+) => (rich ? color(msg) : msg);
 
 function printCronList(jobs: CronJob[], runtime = defaultRuntime) {
   if (jobs.length === 0) {
diff --git a/src/commands/doctor-sandbox.ts b/src/commands/doctor-sandbox.ts
index 23289591a..f94a3822f 100644
--- a/src/commands/doctor-sandbox.ts
+++ b/src/commands/doctor-sandbox.ts
@@ -7,6 +7,7 @@ import {
   DEFAULT_SANDBOX_BROWSER_IMAGE,
   DEFAULT_SANDBOX_COMMON_IMAGE,
   DEFAULT_SANDBOX_IMAGE,
+  resolveSandboxScope,
 } from "../agents/sandbox.js";
 import type { ClawdbotConfig } from "../config/config.js";
 import { runCommandWithTimeout, runExec } from "../process/exec.js";
@@ -248,3 +249,44 @@ export async function maybeRepairSandboxImages(
 
   return next;
 }
+
+export function noteSandboxScopeWarnings(cfg: ClawdbotConfig) {
+  const globalSandbox = cfg.agent?.sandbox;
+  const agents = cfg.routing?.agents ?? {};
+  const warnings: string[] = [];
+
+  for (const [agentId, agent] of Object.entries(agents)) {
+    const agentSandbox = agent.sandbox;
+    if (!agentSandbox) continue;
+
+    const scope = resolveSandboxScope({
+      scope: agentSandbox.scope ?? globalSandbox?.scope,
+      perSession: agentSandbox.perSession ?? globalSandbox?.perSession,
+    });
+
+    if (scope !== "shared") continue;
+
+    const overrides: string[] = [];
+    if (agentSandbox.docker && Object.keys(agentSandbox.docker).length > 0) {
+      overrides.push("docker");
+    }
+    if (agentSandbox.browser && Object.keys(agentSandbox.browser).length > 0) {
+      overrides.push("browser");
+    }
+    if (agentSandbox.prune && Object.keys(agentSandbox.prune).length > 0) {
+      overrides.push("prune");
+    }
+
+    if (overrides.length === 0) continue;
+
+    warnings.push(
+      `- routing.agents.${agentId}.sandbox: ${overrides.join(
+        "/",
+      )} overrides ignored (scope resolves to "shared").`,
+    );
+  }
+
+  if (warnings.length > 0) {
+    note(warnings.join("\n"), "Sandbox");
+  }
+}
diff --git a/src/commands/doctor.test.ts b/src/commands/doctor.test.ts
index 0144c603b..61c32d14e 100644
--- a/src/commands/doctor.test.ts
+++ b/src/commands/doctor.test.ts
@@ -47,7 +47,6 @@ afterEach(() => {
 
 const readConfigFileSnapshot = vi.fn();
 const confirm = vi.fn().mockResolvedValue(true);
-const note = vi.fn();
 const select = vi.fn().mockResolvedValue("node");
 const note = vi.fn();
 const writeConfigFile = vi.fn().mockResolvedValue(undefined);
diff --git a/src/commands/doctor.ts b/src/commands/doctor.ts
index 93115377a..9dcd0a7fc 100644
--- a/src/commands/doctor.ts
+++ b/src/commands/doctor.ts
@@ -22,7 +22,10 @@ import {
   normalizeLegacyConfigValues,
 } from "./doctor-legacy-config.js";
 import { createDoctorPrompter, type DoctorOptions } from "./doctor-prompter.js";
-import { maybeRepairSandboxImages } from "./doctor-sandbox.js";
+import {
+  maybeRepairSandboxImages,
+  noteSandboxScopeWarnings,
+} from "./doctor-sandbox.js";
 import { noteSecurityWarnings } from "./doctor-security.js";
 import {
   noteStateIntegrity,
@@ -124,6 +127,7 @@ export async function doctorCommand(
   await noteStateIntegrity(cfg, prompter);
 
   cfg = await maybeRepairSandboxImages(cfg, runtime, prompter);
+  noteSandboxScopeWarnings(cfg);
 
   await maybeMigrateLegacyGatewayService(
     cfg,