diff --git a/src/commands/doctor.test.ts b/src/commands/doctor.test.ts
index 55f3e2e7..b497fd0b 100644
--- a/src/commands/doctor.test.ts
+++ b/src/commands/doctor.test.ts
@@ -89,6 +89,7 @@ function makeDoctorProgram(deps: DoctorDeps = {}): Command {
   const program = new Command();
   program.exitOverride();
   program.option('--output <mode>', 'output', 'text');
+  program.option('--request-timeout <seconds>', 'per-request timeout in seconds');
   program.addCommand(createDoctorCommand(deps));
   return program;
 }
@@ -470,6 +471,22 @@ describe('createDoctorCommand wiring', () => {
     });
   });
 
+  it('rejects an invalid --request-timeout with the SHARED validation message', async () => {
+    // Guards the drift this repo's shared helper exists to prevent: the doctor
+    // command once carried a private copy whose message differed from every
+    // other command's. Same flag, same bad input, one message.
+    const rejection = await makeDoctorProgram()
+      .parseAsync(['node', 'ts', '--request-timeout', 'abc', 'doctor'])
+      .catch((error: unknown) => error);
+    expect(rejection).toBeInstanceOf(ApiError);
+    expect(rejection).toMatchObject({
+      code: 'VALIDATION_ERROR',
+      exitCode: 5,
+      nextAction:
+        'Flag `--request-timeout` is invalid: "abc" is not valid — must be a positive number of seconds.',
+    });
+  });
+
   it('accepts valid --output modes through command wiring', async () => {
     writeProfile('default', { apiKey: 'sk-user-abc' }, { path: credentialsPath });
     for (const mode of ['text', 'json'] as const) {
diff --git a/src/commands/doctor.ts b/src/commands/doctor.ts
index bf653043..3d812ad3 100644
--- a/src/commands/doctor.ts
+++ b/src/commands/doctor.ts
@@ -19,6 +19,7 @@ import { Command } from 'commander';
 import {
   assertValidEndpointUrl,
   makeHttpClient,
+  parseRequestTimeoutFlag,
   type CommonOptions as FactoryCommonOptions,
 } from '../lib/client-factory.js';
 import {
@@ -28,13 +29,7 @@ import {
   normalizeEnvVar,
   type Config,
 } from '../lib/config.js';
-import {
-  ApiError,
-  CLIError,
-  InterruptError,
-  RequestTimeoutError,
-  localValidationError,
-} from '../lib/errors.js';
+import { ApiError, CLIError, InterruptError, RequestTimeoutError } from '../lib/errors.js';
 import type { FetchImpl } from '../lib/http.js';
 import { globalShutdown } from '../lib/interrupt.js';
 import type { CliOrgBinding, CliOrgSummary } from '../lib/org-render.js';
@@ -504,20 +499,6 @@ function resolveCommonOptions(command: Command, env?: NodeJS.ProcessEnv): Common
   };
 }
 
-function parseRequestTimeoutFlag(raw: string | undefined): number | undefined {
-  if (raw === undefined) return undefined;
-  const seconds = Number(raw);
-  if (!Number.isFinite(seconds) || seconds <= 0) {
-    // Match the other commands: a malformed --request-timeout is a validation
-    // error, not a silently-ignored default.
-    throw localValidationError(
-      'request-timeout',
-      `must be a positive number of seconds (got "${raw}")`,
-    );
-  }
-  return Math.round(seconds * 1000);
-}
-
 function makeOutput(mode: OutputMode, deps: DoctorDeps): Output {
   return new Output(mode, { stdout: deps.stdout, stderr: deps.stderr });
 }