diff --git a/build/profile-esm-resolver.mjs b/build/profile-esm-resolver.mjs
new file mode 100644
index 00000000..b58250cc
--- /dev/null
+++ b/build/profile-esm-resolver.mjs
@@ -0,0 +1,42 @@
+import { pathToFileURL } from 'node:url'
+
+let profileNodeModules = []
+
+export function initialize(data) {
+  if (data?.profileNodeModules) {
+    profileNodeModules = data.profileNodeModules
+  }
+}
+
+export async function resolve(specifier, context, nextResolve) {
+  if (profileNodeModules.length === 0) {
+    return nextResolve(specifier, context)
+  }
+
+  const isBareSpecifier = !specifier.startsWith('.') &&
+    !specifier.startsWith('/') &&
+    !specifier.startsWith('file://') &&
+    !specifier.startsWith('node:') &&
+    !specifier.includes('://')
+
+  if (!isBareSpecifier) {
+    return nextResolve(specifier, context)
+  }
+
+  try {
+    return await nextResolve(specifier, context)
+  } catch (defaultError) {
+    for (const nodeModulesDir of profileNodeModules) {
+      const syntheticParent = pathToFileURL(nodeModulesDir + '/.resolve-anchor/anchor.js').href
+      try {
+        return await nextResolve(specifier, {
+          ...context,
+          parentURL: syntheticParent
+        })
+      } catch {
+        // try next profile
+      }
+    }
+    throw defaultError
+  }
+}
diff --git a/build/profile-module-paths.mjs b/build/profile-module-paths.mjs
new file mode 100644
index 00000000..0e72f46e
--- /dev/null
+++ b/build/profile-module-paths.mjs
@@ -0,0 +1,49 @@
+import { readdirSync, existsSync } from 'node:fs'
+import { createRequire, register } from 'node:module'
+import { join, delimiter, dirname } from 'node:path'
+import { fileURLToPath, pathToFileURL } from 'node:url'
+
+const dshHome = process.env.DSH_HOME
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = dirname(__filename)
+
+function collectProfileNodeModules(home) {
+  if (!home) return []
+  const profilesDir = join(home, 'profiles')
+  try {
+    return readdirSync(profilesDir, { withFileTypes: true })
+      .filter((entry) => entry.isDirectory())
+      .map((entry) => join(profilesDir, entry.name, 'node_modules'))
+      .filter((dir) => existsSync(dir))
+  } catch {
+    return []
+  }
+}
+
+const profileNodeModules = collectProfileNodeModules(dshHome)
+
+if (profileNodeModules.length > 0) {
+  const paths = profileNodeModules.join(delimiter)
+  if (process.env.NODE_PATH) {
+    process.env.NODE_PATH = process.env.NODE_PATH + delimiter + paths
+  } else {
+    process.env.NODE_PATH = paths
+  }
+
+  try {
+    const require = createRequire(import.meta.url)
+    const Module = require('node:module')
+    if (Module.globalPaths) {
+      for (const dir of profileNodeModules) {
+        if (!Module.globalPaths.includes(dir)) {
+          Module.globalPaths.push(dir)
+        }
+      }
+    }
+  } catch {
+      // Best effort for CJS fallback
+  }
+
+  const resolverUrl = pathToFileURL(join(__dirname, 'profile-esm-resolver.mjs')).href
+  register(resolverUrl, { data: { profileNodeModules } })
+}
diff --git a/package.json b/package.json
index 07c2c546..b5e712cc 100644
--- a/package.json
+++ b/package.json
@@ -111,6 +111,14 @@
         "from": "build/harness-node-entry.mjs",
         "to": "harness-node-entry.mjs"
       },
+      {
+        "from": "build/profile-module-paths.mjs",
+        "to": "profile-module-paths.mjs"
+      },
+      {
+        "from": "build/profile-esm-resolver.mjs",
+        "to": "profile-esm-resolver.mjs"
+      },
       {
         "from": "build/dsh-desktop.patch.yml",
         "to": "dsh-desktop.patch.yml"
diff --git a/src/main/index.ts b/src/main/index.ts
index d118507e..43be14d1 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -457,6 +457,7 @@ async function bootstrap(): Promise<void> {
     dshEntryPath: dshEntryPath(),
     nodeExecutablePath: bundledNodePath(),
     nodeEntryPath: harnessNodeEntryPath(),
+    profileModulePathsPath: desktopResourcePath('profile-module-paths.mjs'),
     dshPatchPath: desktopResourcePath('dsh-desktop.patch.yml'),
     dshHome: join(app.getPath('userData'), 'harness'),
     logPath: join(app.getPath('logs'), 'harness.log'),
diff --git a/src/main/runtime/harness-runtime.ts b/src/main/runtime/harness-runtime.ts
index 7555bdbb..db3d4f08 100644
--- a/src/main/runtime/harness-runtime.ts
+++ b/src/main/runtime/harness-runtime.ts
@@ -9,6 +9,7 @@ export interface HarnessRuntimeOptions {
   dshEntryPath: string
   nodeExecutablePath: string
   nodeEntryPath: string
+  profileModulePathsPath: string
   dshPatchPath: string
   dshHome: string
   logPath: string
@@ -36,7 +37,8 @@ export function buildHarnessSpawnOptions(
   launchDirectory: string,
   dshHome: string,
   platform: NodeJS.Platform = process.platform,
-  environment: NodeJS.ProcessEnv = process.env
+  environment: NodeJS.ProcessEnv = process.env,
+  profileModulePathsPath?: string
 ): SpawnOptionsWithoutStdio {
   const { ELECTRON_RUN_AS_NODE: _runAsNode, ...parentEnvironment } = environment
   const pathKey = platform === 'win32' ? 'Path' : 'PATH'
@@ -47,6 +49,7 @@ export function buildHarnessSpawnOptions(
       ...parentEnvironment,
       DSH_HOME: dshHome,
       NO_COLOR: '1',
+      ...(profileModulePathsPath ? { DSH_DESKTOP_PROFILE_MODULE_PATHS: profileModulePathsPath } : {}),
       [pathKey]: environment[pathKey] ?? environment.PATH ?? ''
     },
     stdio: ['pipe', 'pipe', 'pipe'],
@@ -58,10 +61,12 @@ export function buildNodeArguments(
   nodeEntryPath: string,
   dshEntryPath: string,
   port: number,
-  patchPath?: string
+  patchPath?: string,
+  profileModulePathsPath?: string
 ): string[] {
   return [
     '--expose-internals',
+    ...(profileModulePathsPath ? ['--import', profileModulePathsPath] : []),
     nodeEntryPath,
     dshEntryPath,
     ...buildHarnessArguments(port, patchPath)
@@ -121,7 +126,8 @@ export class HarnessRuntime {
       this.options.nodeEntryPath,
       this.options.dshEntryPath,
       port,
-      this.options.dshPatchPath
+      this.options.dshPatchPath,
+      this.options.profileModulePathsPath
     )
     const startupTimeoutMs =
       this.options.startupTimeoutMs ?? (process.platform === 'win32' ? 120_000 : 45_000)
@@ -136,7 +142,7 @@ export class HarnessRuntime {
       child = this.options.launchProcess(
         this.options.nodeExecutablePath,
         args,
-        buildHarnessSpawnOptions(launchDirectory, this.options.dshHome)
+        buildHarnessSpawnOptions(launchDirectory, this.options.dshHome, undefined, undefined, this.options.profileModulePathsPath)
       )
     } catch (error) {
       const message = error instanceof Error ? error.message : String(error)
diff --git a/test/profile-module-paths.test.ts b/test/profile-module-paths.test.ts
new file mode 100644
index 00000000..7605bba3
--- /dev/null
+++ b/test/profile-module-paths.test.ts
@@ -0,0 +1,72 @@
+import { describe, expect, it } from 'vitest'
+import { mkdir, writeFile, rm } from 'node:fs/promises'
+import { join } from 'node:path'
+import { tmpdir } from 'node:os'
+import { pathToFileURL } from 'node:url'
+
+describe('Profile module paths resolution', () => {
+  it('resolves bare specifiers from profile node_modules via synthetic parent', async () => {
+    const testDir = join(tmpdir(), `dsh-desktop-resolver-${Date.now()}`)
+    const profileNodeModules = join(testDir, 'profiles', 'web', 'node_modules')
+    const packageDir = join(profileNodeModules, 'test-profile-pkg')
+
+    await mkdir(packageDir, { recursive: true })
+    await writeFile(
+      join(packageDir, 'package.json'),
+      JSON.stringify({ name: 'test-profile-pkg', version: '1.0.0', main: 'index.js', type: 'module' })
+    )
+    await writeFile(join(packageDir, 'index.js'), 'export const value = 42;\n')
+
+    try {
+      const resolverUrl = pathToFileURL(join(process.cwd(), 'build', 'profile-esm-resolver.mjs')).href
+      const mod = await import(resolverUrl)
+
+      mod.initialize({ profileNodeModules: [profileNodeModules] })
+
+      const fakeParent = 'file:///app/somewhere/module.js'
+      const nextResolve = (specifier: string, _context: unknown) => {
+        if (specifier.includes('test-profile-pkg')) {
+          return Promise.resolve({ url: pathToFileURL(join(packageDir, 'index.js')).href, shortCircuit: true })
+        }
+        return Promise.reject(new Error(`not found: ${specifier}`))
+      }
+
+      const result = await mod.resolve(
+        'test-profile-pkg',
+        { parentURL: fakeParent, conditions: ['import'] },
+        nextResolve
+      )
+
+      expect(result.url).toContain('test-profile-pkg')
+      expect(result.url).toContain('index.js')
+    } finally {
+      await rm(testDir, { recursive: true, force: true })
+    }
+  })
+
+  it('passes through non-bare specifiers unchanged', async () => {
+    const resolverUrl = pathToFileURL(join(process.cwd(), 'build', 'profile-esm-resolver.mjs')).href
+    const mod = await import(resolverUrl)
+
+    mod.initialize({ profileNodeModules: ['/fake/profile/node_modules'] })
+
+    const fakeParent = 'file:///app/module.js'
+    let capturedSpecifier = ''
+    const nextResolve = (specifier: string, _context: unknown) => {
+      capturedSpecifier = specifier
+      return Promise.resolve({ url: `file:///resolved/${specifier}`, shortCircuit: true })
+    }
+
+    await mod.resolve('./relative.js', { parentURL: fakeParent }, nextResolve)
+    expect(capturedSpecifier).toBe('./relative.js')
+
+    await mod.resolve('/absolute/path.js', { parentURL: fakeParent }, nextResolve)
+    expect(capturedSpecifier).toBe('/absolute/path.js')
+
+    await mod.resolve('node:path', { parentURL: fakeParent }, nextResolve)
+    expect(capturedSpecifier).toBe('node:path')
+
+    await mod.resolve('file:///some/file.js', { parentURL: fakeParent }, nextResolve)
+    expect(capturedSpecifier).toBe('file:///some/file.js')
+  })
+})
diff --git a/test/runtime.test.ts b/test/runtime.test.ts
index 816548ab..8f5d182a 100644
--- a/test/runtime.test.ts
+++ b/test/runtime.test.ts
@@ -56,6 +56,27 @@ describe('Harness launch contract', () => {
         Path: 'windows-path'
       }
     })
+    expect(options.env).not.toHaveProperty('DSH_DESKTOP_PROFILE_MODULE_PATHS')
+  })
+
+  it('passes profile module paths env when provided', () => {
+    const options = buildHarnessSpawnOptions(
+      'C:\\Users\\tester\\AppData\\Roaming\\dsh-desktop\\launch-root',
+      'C:\\Users\\tester\\AppData\\Roaming\\dsh-desktop\\harness',
+      'win32',
+      {
+        ELECTRON_RUN_AS_NODE: '1',
+        PATH: 'fallback-path',
+        Path: 'windows-path'
+      },
+      'C:\\app\\profile-module-paths.mjs'
+    )
+
+    expect(options.env).toMatchObject({
+      DSH_HOME: 'C:\\Users\\tester\\AppData\\Roaming\\dsh-desktop\\harness',
+      DSH_DESKTOP_PROFILE_MODULE_PATHS: 'C:\\app\\profile-module-paths.mjs',
+      NO_COLOR: '1'
+    })
     expect(options.env).not.toHaveProperty('ELECTRON_RUN_AS_NODE')
   })
 
@@ -81,6 +102,32 @@ describe('Harness launch contract', () => {
     ])
   })
 
+  it('injects profile module paths via --import when provided', () => {
+    expect(
+      buildNodeArguments(
+        'C:\\app\\harness-node-entry.mjs',
+        'C:\\app\\dsh\\lib\\bin.js',
+        43127,
+        'C:\\app\\dsh-desktop.patch.yml',
+        'C:\\app\\profile-module-paths.mjs'
+      )
+    ).toEqual([
+      '--expose-internals',
+      '--import',
+      'C:\\app\\profile-module-paths.mjs',
+      'C:\\app\\harness-node-entry.mjs',
+      'C:\\app\\dsh\\lib\\bin.js',
+      'web',
+      '--patch',
+      'C:\\app\\dsh-desktop.patch.yml',
+      '--host',
+      '127.0.0.1',
+      '--port',
+      '43127'
+    ])
+  })
+
+
   it('makes native Windows termination codes diagnosable', () => {
     expect(formatExitCode(4294930435)).toContain(
       '0xFFFF7003, Crashpad handler unavailable'