diff --git a/.prettierignore b/.prettierignore
index 32405c6..5380627 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -2,3 +2,4 @@ pnpm-lock.yaml
 dist/
 node_modules/
 CHANGELOG.md
+CLAUDE.md
diff --git a/__tests__/e2e/system-check-failure.e2e.ts b/__tests__/e2e/system-check-failure.e2e.ts
index 9defccf..be58b24 100644
--- a/__tests__/e2e/system-check-failure.e2e.ts
+++ b/__tests__/e2e/system-check-failure.e2e.ts
@@ -1,4 +1,5 @@
 import { createSession } from './testing-framework/index.js';
+import { IS_WINDOWS } from './testing-framework/env.js';
 import { dirname } from 'node:path';
 
 describe('when system check fails', () => {
@@ -18,8 +19,13 @@ describe('when system check fails', () => {
     expect(session.snapshot()).toMatchSnapshot('system-check-failure');
   });
 
-  it('shows error when node is not on PATH', async () => {
-    // PATH with git but not node — CLI still runs via absolute path
+  /**
+   * @todo Make this test work on Windows. It currently relies on `/usr/bin`
+   * as a PATH that contains git but not node, which has no direct Windows
+   * equivalent. Constructing one portably is non-trivial because git's
+   * install location varies across Windows setups.
+   */
+  it.skipIf(IS_WINDOWS)('shows error when node is not on PATH', async () => {
     using session = createSession({ systemPath: '/usr/bin' });
 
     await session.waitForText('Start setup');
diff --git a/__tests__/e2e/testing-framework/env.ts b/__tests__/e2e/testing-framework/env.ts
index 4055bff..3678749 100644
--- a/__tests__/e2e/testing-framework/env.ts
+++ b/__tests__/e2e/testing-framework/env.ts
@@ -1,5 +1,8 @@
 export { AUTH_CALLBACK_PORT } from '@lib/auth.js';
 
+/** `true` when the test suite is running on Windows. */
+export const IS_WINDOWS = process.platform === 'win32';
+
 /**
  * Baseline environment variables injected into every e2e terminal session.
  *
diff --git a/__tests__/e2e/testing-framework/mocks/binaries/fs.ts b/__tests__/e2e/testing-framework/mocks/binaries/fs.ts
new file mode 100644
index 0000000..86340dc
--- /dev/null
+++ b/__tests__/e2e/testing-framework/mocks/binaries/fs.ts
@@ -0,0 +1,21 @@
+import { writeFileSync, chmodSync } from 'node:fs';
+import { join } from 'node:path';
+import { IS_WINDOWS } from '../../env.js';
+
+export const writeMockBinary = IS_WINDOWS ? writeWindowsBinary : writeUnixBinary;
+
+function writeUnixBinary(dir: string, name: string, script: string): void {
+  const filePath = join(dir, name);
+  writeFileSync(filePath, script, 'utf-8');
+  chmodSync(filePath, 0o755);
+}
+
+function writeWindowsBinary(dir: string, name: string, script: string): void {
+  const jsPath = join(dir, `${name}.js`);
+  writeFileSync(jsPath, script.replace(/^#!.*\n/, ''), 'utf-8');
+  writeFileSync(join(dir, `${name}.cmd`), `@node "%~dp0${name}.js" %*\r\n`, 'utf-8');
+}
+
+export const writeMockOpenStub = IS_WINDOWS
+  ? (dir: string) => writeFileSync(join(dir, 'open.cmd'), '@exit /b 0\r\n', 'utf-8')
+  : (dir: string) => writeUnixBinary(dir, 'open', '#!/bin/sh\nexit 0\n');
diff --git a/__tests__/e2e/testing-framework/mocks/binaries/index.ts b/__tests__/e2e/testing-framework/mocks/binaries/index.ts
index 0a6a082..34be236 100644
--- a/__tests__/e2e/testing-framework/mocks/binaries/index.ts
+++ b/__tests__/e2e/testing-framework/mocks/binaries/index.ts
@@ -1,8 +1,9 @@
-import { writeFileSync, mkdirSync, chmodSync } from 'node:fs';
+import { mkdirSync } from 'node:fs';
 import { join } from 'node:path';
 import { CLAUDE_SCRIPT } from './claude.js';
 import { CURSOR_SCRIPT } from './cursor.js';
 import { CODEX_SCRIPT } from './codex.js';
+import { writeMockBinary, writeMockOpenStub } from './fs.js';
 
 /** Filename the mock IDE binary writes the chat prompt to. */
 export const CHAT_PROMPT_FILE = '.e2e-chat-prompt';
@@ -10,12 +11,6 @@ export const CHAT_PROMPT_FILE = '.e2e-chat-prompt';
 /** Filename the mock IDE binary writes the onboarding invocation JSON to. */
 export const ONBOARDING_INVOCATION_FILE = '.e2e-onboarding-invocation';
 
-function writeMockBinary(dir: string, name: string, script: string): void {
-  const filePath = join(dir, name);
-  writeFileSync(filePath, script, 'utf-8');
-  chmodSync(filePath, 0o755);
-}
-
 /**
  * Creates a directory of executable mock IDE binaries (`claude`, `cursor`,
  * `codex`, `open`) that the wizard will find on `PATH` during e2e tests.
@@ -34,7 +29,8 @@ export function createMockBinDir(dir: string): string {
   writeMockBinary(binDir, 'claude', CLAUDE_SCRIPT);
   writeMockBinary(binDir, 'cursor', CURSOR_SCRIPT);
   writeMockBinary(binDir, 'codex', CODEX_SCRIPT);
-  writeMockBinary(binDir, 'open', '#!/bin/sh\nexit 0\n');
+
+  writeMockOpenStub(binDir);
 
   return binDir;
 }
diff --git a/__tests__/e2e/testing-framework/session-factory.ts b/__tests__/e2e/testing-framework/session-factory.ts
index d2c706f..e91af91 100644
--- a/__tests__/e2e/testing-framework/session-factory.ts
+++ b/__tests__/e2e/testing-framework/session-factory.ts
@@ -1,6 +1,6 @@
 import { mkdtempSync, writeFileSync } from 'node:fs';
-import { join } from 'node:path';
 import { tmpdir } from 'node:os';
+import { delimiter, join } from 'node:path';
 import { TerminalSession } from './terminal/index.js';
 import { createProjectDir, type ProjectType } from '../../shared/project-scaffold/index.js';
 
@@ -56,7 +56,7 @@ export function createSession({
   const { path: projectDir } = createProjectDir(project);
 
   const sessionEnv: Record<string, string> = {
-    PATH: `${mockBinDir}:${systemPath ?? process.env.PATH}`,
+    PATH: `${mockBinDir}${delimiter}${systemPath ?? process.env.PATH}`,
     ...env,
   };
 
diff --git a/__tests__/e2e/testing-framework/terminal/session.ts b/__tests__/e2e/testing-framework/terminal/session.ts
index 50d12fa..30dea01 100644
--- a/__tests__/e2e/testing-framework/terminal/session.ts
+++ b/__tests__/e2e/testing-framework/terminal/session.ts
@@ -5,7 +5,7 @@ import { tmpdir } from 'node:os';
 import { join } from 'node:path';
 import { stripAnsi } from './strip-ansi.js';
 import { renderScreen, normalizeSnapshot } from './screen-buffer.js';
-import { E2E_BASE_ENV } from '../env.js';
+import { E2E_BASE_ENV, IS_WINDOWS } from '../env.js';
 import { resolveKey, type Modifiers } from '../../../shared/key-map.js';
 
 const CLI_PATH = resolve(import.meta.dirname, '../../../../dist/bin/cli.js');
@@ -85,8 +85,15 @@ export class TerminalSession {
         ...process.env,
         ...E2E_BASE_ENV,
         ...env,
+
         HOME: isolatedTmpDir,
         TMPDIR: isolatedTmpDir,
+
+        ...(IS_WINDOWS && {
+          USERPROFILE: isolatedTmpDir,
+          TEMP: isolatedTmpDir,
+          TMP: isolatedTmpDir,
+        }),
       },
     });
 
diff --git a/__tests__/shared/platform.ts b/__tests__/shared/platform.ts
new file mode 100644
index 0000000..7dbb967
--- /dev/null
+++ b/__tests__/shared/platform.ts
@@ -0,0 +1,5 @@
+export const isWindows = process.platform === 'win32';
+
+export function perPlatform<T>(options: { windows: T; unix: T }): T {
+  return isWindows ? options.windows : options.unix;
+}
diff --git a/__tests__/shared/project-scaffold/index.ts b/__tests__/shared/project-scaffold/index.ts
index a170981..4bed870 100644
--- a/__tests__/shared/project-scaffold/index.ts
+++ b/__tests__/shared/project-scaffold/index.ts
@@ -1,4 +1,7 @@
 import { mkdtempSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import { perPlatform } from '../platform.js';
 import { SCAFFOLDS } from './scaffolds.js';
 import type { ProjectType } from './types.js';
 
@@ -9,10 +12,15 @@ export type { ProjectType };
  * project scaffold. Supports `Symbol.dispose` for automatic cleanup.
  *
  * @remarks
- * Uses a hardcoded `/tmp/` prefix instead of `os.tmpdir()`. On macOS
- * `tmpdir()` returns `/var/folders/…` which is longer than Linux's `/tmp/`,
- * shifting column alignment in the VT100 screen buffer and breaking e2e
- * snapshot assertions across platforms.
+ * Uses `/tmp/` on Unix instead of `os.tmpdir()`. On macOS `tmpdir()`
+ * returns `/var/folders/…` which is longer than Linux's `/tmp/`, shifting
+ * column alignment in the VT100 screen buffer and breaking e2e snapshot
+ * assertions across platforms. On Windows, `/tmp/` doesn't exist so we
+ * fall back to `os.tmpdir()`.
+ *
+ * @todo The Windows `tmpdir()` path is longer than `/tmp/`, producing
+ * different VT100 column alignment and incompatible e2e snapshots. When
+ * Windows CI is added, use a fixed-length prefix on all platforms.
  *
  * @param type - A named scaffold, or `null` for an empty directory.
  *   @defaultValue `'react'`
@@ -26,7 +34,12 @@ export type { ProjectType };
  * ```
  */
 export function createProjectDir(type: ProjectType = 'react') {
-  const dir = mkdtempSync('/tmp/wizard-test-');
+  const prefix = perPlatform({
+    windows: join(tmpdir(), 'wizard-test-'),
+    unix: '/tmp/wizard-test-',
+  });
+
+  const dir = mkdtempSync(prefix);
   SCAFFOLDS[type](dir);
 
   return {
diff --git a/package.json b/package.json
index 7525d4a..2e26108 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "typecheck": "tsc --noEmit",
     "qa": "pnpm typecheck && pnpm lint && pnpm test",
     "clear": "./scripts/clean-dev-env.sh",
-    "prepare": "husky"
+    "prepare": "git config --local core.symlinks true && husky"
   },
   "dependencies": {
     "@inkjs/ui": "^2.0.0",
diff --git a/vitest.config.e2e.ts b/vitest.config.e2e.ts
index 0481f0b..393a2b6 100644
--- a/vitest.config.e2e.ts
+++ b/vitest.config.e2e.ts
@@ -1,14 +1,15 @@
+import { fileURLToPath } from 'node:url';
 import { defineConfig } from 'vitest/config';
 
 export default defineConfig({
   resolve: {
     alias: {
-      '@commands': new URL('./src/commands', import.meta.url).pathname,
-      '@frameworks': new URL('./src/frameworks', import.meta.url).pathname,
-      '@integrations': new URL('./src/integrations', import.meta.url).pathname,
-      '@providers': new URL('./src/providers', import.meta.url).pathname,
-      '@ui': new URL('./src/ui', import.meta.url).pathname,
-      '@lib': new URL('./src/lib', import.meta.url).pathname,
+      '@commands': fileURLToPath(new URL('./src/commands', import.meta.url)),
+      '@frameworks': fileURLToPath(new URL('./src/frameworks', import.meta.url)),
+      '@integrations': fileURLToPath(new URL('./src/integrations', import.meta.url)),
+      '@providers': fileURLToPath(new URL('./src/providers', import.meta.url)),
+      '@ui': fileURLToPath(new URL('./src/ui', import.meta.url)),
+      '@lib': fileURLToPath(new URL('./src/lib', import.meta.url)),
     },
   },
   test: {
diff --git a/vitest.config.ts b/vitest.config.ts
index 7369bcf..338847d 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -1,3 +1,4 @@
+import { fileURLToPath } from 'node:url';
 import { defineConfig } from 'vitest/config';
 
 const isCI = !!process.env.CI;
@@ -5,14 +6,14 @@ const isCI = !!process.env.CI;
 export default defineConfig({
   resolve: {
     alias: {
-      '@commands': new URL('./src/commands', import.meta.url).pathname,
-      '@features': new URL('./src/features', import.meta.url).pathname,
-      '@frameworks': new URL('./src/frameworks', import.meta.url).pathname,
-      '@integrations': new URL('./src/integrations', import.meta.url).pathname,
-      '@providers': new URL('./src/providers', import.meta.url).pathname,
-      '@shared-kernel': new URL('./src/shared-kernel', import.meta.url).pathname,
-      '@ui': new URL('./src/ui', import.meta.url).pathname,
-      '@lib': new URL('./src/lib', import.meta.url).pathname,
+      '@commands': fileURLToPath(new URL('./src/commands', import.meta.url)),
+      '@features': fileURLToPath(new URL('./src/features', import.meta.url)),
+      '@frameworks': fileURLToPath(new URL('./src/frameworks', import.meta.url)),
+      '@integrations': fileURLToPath(new URL('./src/integrations', import.meta.url)),
+      '@providers': fileURLToPath(new URL('./src/providers', import.meta.url)),
+      '@shared-kernel': fileURLToPath(new URL('./src/shared-kernel', import.meta.url)),
+      '@ui': fileURLToPath(new URL('./src/ui', import.meta.url)),
+      '@lib': fileURLToPath(new URL('./src/lib', import.meta.url)),
     },
   },
   test: {