diff --git a/.changeset/pr-1426.md b/.changeset/pr-1426.md
new file mode 100644
index 0000000000..cfb3c5483a
--- /dev/null
+++ b/.changeset/pr-1426.md
@@ -0,0 +1,6 @@
+<!-- auto-generated -->
+---
+'@sanity/cli': patch
+---
+
+fix(dev): align dev server typegen defaults with `sanity typegen generate`
\ No newline at end of file
diff --git a/packages/@sanity/cli/src/server/vite/__tests__/plugin-typegen.test.ts b/packages/@sanity/cli/src/server/vite/__tests__/plugin-typegen.test.ts
index 2072780114..8498050dbc 100644
--- a/packages/@sanity/cli/src/server/vite/__tests__/plugin-typegen.test.ts
+++ b/packages/@sanity/cli/src/server/vite/__tests__/plugin-typegen.test.ts
@@ -2,6 +2,7 @@ import path from 'node:path'
 
 import {CLITelemetryStore} from '@sanity/cli-core'
 import {createMockHttpServer, createMockWatcher} from '@sanity/cli-test'
+import {configDefinition} from '@sanity/codegen'
 import {afterEach, beforeEach, describe, expect, it, vi} from 'vitest'
 
 import {sanityTypegenPlugin} from '../plugin-typegen.js'
@@ -272,7 +273,7 @@ describe('sanityTypegenPlugin', () => {
     })
   })
 
-  it('applies default config values', async () => {
+  it('applies the same default config values as `sanity typegen generate`', async () => {
     vi.useRealTimers()
 
     const plugin = sanityTypegenPlugin({
@@ -288,12 +289,7 @@ describe('sanityTypegenPlugin', () => {
     await buildEnd()
 
     expect(runTypegenGenerate).toHaveBeenCalledWith({
-      config: expect.objectContaining({
-        formatGeneratedCode: false,
-        generates: 'sanity.types.ts',
-        overloadClientMethods: false,
-        schema: 'schema.json',
-      }),
+      config: configDefinition.parse({}),
       workDir: TEST_PROJECT_DIR,
     })
   })
diff --git a/packages/@sanity/cli/src/server/vite/plugin-typegen.ts b/packages/@sanity/cli/src/server/vite/plugin-typegen.ts
index a06105858e..d4f0bc85ce 100644
--- a/packages/@sanity/cli/src/server/vite/plugin-typegen.ts
+++ b/packages/@sanity/cli/src/server/vite/plugin-typegen.ts
@@ -4,6 +4,7 @@ import path from 'node:path'
 import {CLITelemetryStore} from '@sanity/cli-core'
 import {logSymbols} from '@sanity/cli-core/ux'
 import {
+  configDefinition,
   type GenerationResult,
   runTypegenGenerate,
   type TypeGenConfig,
@@ -18,12 +19,6 @@ import {type Plugin} from 'vite'
 
 import {toForwardSlashes} from '../../util/toForwardSlashes.js'
 
-/**
- * Default glob patterns to watch for query file changes.
- * Covers common source directory naming conventions.
- */
-const DEFAULT_QUERY_PATTERNS = ['./src/**/*.{ts,tsx,js,jsx}', './app/**/*.{ts,tsx,js,jsx}']
-
 /** Default debounce delay in milliseconds */
 const DEFAULT_DEBOUNCE_MS = 1000
 
@@ -85,14 +80,9 @@ interface TypegenPluginOptions {
 export function sanityTypegenPlugin(options: TypegenPluginOptions): Plugin {
   const {config: inputConfig, output = console, telemetryLogger, workDir} = options
 
-  // Apply defaults to config
-  const config: TypeGenConfig = {
-    formatGeneratedCode: inputConfig.formatGeneratedCode ?? false,
-    generates: inputConfig.generates ?? 'sanity.types.ts',
-    overloadClientMethods: inputConfig.overloadClientMethods ?? false,
-    path: inputConfig.path ?? DEFAULT_QUERY_PATTERNS,
-    schema: inputConfig.schema ?? 'schema.json',
-  }
+  // Apply defaults through the same schema as `sanity typegen generate`,
+  // so watch mode and manual generation produce identical output
+  const config: TypeGenConfig = configDefinition.parse(inputConfig)
 
   // Build query patterns from config
   const queryPatterns = Array.isArray(config.path) ? config.path : [config.path]