diff --git a/.planning/phases/16-frontend-scaffold/16-01-PLAN.md b/.planning/phases/16-frontend-scaffold/16-01-PLAN.md
new file mode 100644
index 0000000..2131eac
--- /dev/null
+++ b/.planning/phases/16-frontend-scaffold/16-01-PLAN.md
@@ -0,0 +1,154 @@
+---
+phase: 16-frontend-scaffold
+plan: 01
+type: execute
+wave: 1
+depends_on: []
+files_modified: [packages/web/package.json, packages/web/vite.config.ts, packages/web/tsconfig.json, packages/web/tsconfig.app.json, packages/web/index.html, packages/web/src/main.tsx, packages/web/src/App.tsx, packages/web/src/index.css, packages/web/postcss.config.js, packages/web/components.json, packages/web/tailwind.config.ts, packages/web/src/lib/utils.ts, package.json, tsconfig.json]
+autonomous: true
+---
+
+<objective>
+Create the Vite + React project with Tailwind CSS and shadcn/ui component library.
+
+Purpose: Establish the frontend build toolchain and component foundation for all subsequent UI work. This is the bare-bones project that compiles and serves an empty page with styling ready.
+Output: A working `packages/web/` directory with Vite dev server, Tailwind CSS, and shadcn/ui configured.
+</objective>
+
+<execution_context>
+@~/.claude/get-shit-done/workflows/execute-plan.md
+@~/.claude/get-shit-done/templates/summary.md
+</execution_context>
+
+<context>
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+
+# Existing project structure - this is currently a single package
+@package.json
+@tsconfig.json
+</context>
+
+<tasks>
+
+<task type="auto">
+  <name>Task 1: Create Vite + React + TypeScript project</name>
+  <files>packages/web/package.json, packages/web/vite.config.ts, packages/web/tsconfig.json, packages/web/tsconfig.app.json, packages/web/index.html, packages/web/src/main.tsx, packages/web/src/App.tsx, packages/web/src/index.css, package.json, tsconfig.json</files>
+  <action>
+1. Create `packages/web/` directory.
+2. Initialize a new Vite project with React + TypeScript template files manually (do NOT use `npm create vite` interactively):
+   - `packages/web/package.json` with name `@codewalk-district/web`, type `module`, scripts: `dev`, `build`, `preview`, `lint`. Dependencies: `react`, `react-dom`. Dev dependencies: `@types/react`, `@types/react-dom`, `@vitejs/plugin-react`, `typescript`, `vite`.
+   - `packages/web/vite.config.ts` with react plugin. Set server proxy: `/trpc` → `http://127.0.0.1:3847/trpc` to avoid CORS issues during development.
+   - `packages/web/tsconfig.json` extending `tsconfig.app.json` with references.
+   - `packages/web/tsconfig.app.json` targeting ES2020, module ESNext, moduleResolution bundler, strict mode, jsx react-jsx, include `src`.
+   - `packages/web/index.html` standard Vite entry pointing to `/src/main.tsx`.
+   - `packages/web/src/main.tsx` rendering `<App />` into `#root`.
+   - `packages/web/src/App.tsx` minimal component returning `<div>Codewalk District</div>`.
+
+3. Update root `package.json`:
+   - Add `"workspaces": ["packages/*"]` for npm workspaces.
+   - Add script `"dev:web": "npm run dev --workspace=packages/web"`.
+   - Keep all existing scripts and dependencies unchanged.
+
+4. Run `npm install` from root to link workspaces.
+
+Do NOT modify any existing source files in `src/`. Only touch root package.json and tsconfig.json for workspace config.
+  </action>
+  <verify>
+cd packages/web && npx vite build succeeds without errors.
+npm run dev:web starts dev server (verify it starts, then kill).
+  </verify>
+  <done>Vite dev server starts and builds. Root workspace config links packages/web.</done>
+</task>
+
+<task type="auto">
+  <name>Task 2: Configure Tailwind CSS and shadcn/ui</name>
+  <files>packages/web/tailwind.config.ts, packages/web/postcss.config.js, packages/web/src/index.css, packages/web/components.json, packages/web/src/lib/utils.ts, packages/web/package.json</files>
+  <action>
+1. Install Tailwind CSS v3 in packages/web:
+   - Dev dependencies: `tailwindcss`, `postcss`, `autoprefixer`, `@tailwindcss/typography`
+   - `postcss.config.js` with tailwindcss and autoprefixer plugins.
+   - `tailwind.config.ts` with content paths pointing to `./src/**/*.{ts,tsx}`, extend theme as needed.
+
+2. Update `packages/web/src/index.css` with Tailwind directives:
+   ```css
+   @tailwind base;
+   @tailwind components;
+   @tailwind utilities;
+   ```
+   Plus CSS custom properties for shadcn theming (the standard shadcn/ui CSS variables for colors, radius, etc.).
+
+3. Install shadcn/ui dependencies:
+   - Dependencies: `class-variance-authority`, `clsx`, `tailwind-merge`, `lucide-react`
+   - Dev dependency: `tailwindcss-animate`
+   - Add tailwindcss-animate plugin to tailwind.config.ts
+
+4. Create `packages/web/components.json` (shadcn/ui config):
+   ```json
+   {
+     "$schema": "https://ui.shadcn.com/schema.json",
+     "style": "default",
+     "rsc": false,
+     "tsx": true,
+     "tailwind": {
+       "config": "tailwind.config.ts",
+       "css": "src/index.css",
+       "baseColor": "neutral",
+       "cssVariables": true
+     },
+     "aliases": {
+       "components": "@/components",
+       "utils": "@/lib/utils"
+     }
+   }
+   ```
+
+5. Create `packages/web/src/lib/utils.ts`:
+   ```typescript
+   import { type ClassValue, clsx } from "clsx"
+   import { twMerge } from "tailwind-merge"
+
+   export function cn(...inputs: ClassValue[]) {
+     return twMerge(clsx(inputs))
+   }
+   ```
+
+6. Configure path aliases in `vite.config.ts` and `tsconfig.app.json`:
+   - `@/` → `./src/` (standard shadcn convention)
+   - Install `@types/node` as dev dependency for path resolution in vite config.
+
+7. Update `packages/web/src/App.tsx` to use a Tailwind class (e.g., `<div className="text-2xl font-bold p-8">Codewalk District</div>`) to verify Tailwind works.
+
+8. Run `npm install` from root after adding dependencies.
+  </action>
+  <verify>
+npx vite build in packages/web succeeds.
+The built output includes Tailwind styles (check dist/assets/*.css contains Tailwind resets).
+  </verify>
+  <done>Tailwind CSS compiles. shadcn/ui configured with components.json and utils.ts. Path alias `@/` resolves.</done>
+</task>
+
+</tasks>
+
+<verification>
+Before declaring plan complete:
+- [ ] `cd packages/web && npx vite build` succeeds
+- [ ] Root `npm install` completes without errors
+- [ ] `npm run dev:web` starts Vite dev server
+- [ ] Tailwind classes render in built output
+- [ ] `@/` path alias resolves in imports
+</verification>
+
+<success_criteria>
+
+- Vite + React + TypeScript project builds in packages/web/
+- Tailwind CSS configured and compiling
+- shadcn/ui components.json and utils ready
+- Root npm workspaces configured
+- Dev server starts with proxy to backend
+  </success_criteria>
+
+<output>
+After completion, create `.planning/phases/16-frontend-scaffold/16-01-SUMMARY.md`
+</output>
diff --git a/.planning/phases/16-frontend-scaffold/16-02-PLAN.md b/.planning/phases/16-frontend-scaffold/16-02-PLAN.md
new file mode 100644
index 0000000..b6a1654
--- /dev/null
+++ b/.planning/phases/16-frontend-scaffold/16-02-PLAN.md
@@ -0,0 +1,107 @@
+---
+phase: 16-frontend-scaffold
+plan: 02
+type: execute
+wave: 1
+depends_on: []
+files_modified: [packages/shared/package.json, packages/shared/tsconfig.json, packages/shared/src/index.ts, packages/shared/src/trpc.ts, packages/shared/src/types.ts, package.json, src/trpc/router.ts]
+autonomous: true
+---
+
+<objective>
+Export shared types (AppRouter, DB entity types) from a shared package so the frontend can consume them.
+
+Purpose: The frontend needs AppRouter type for tRPC client type inference, and DB entity types (Initiative, Phase, Task, Agent, Message) for component props. Creating a shared package avoids import path gymnastics between backend and frontend.
+Output: `packages/shared/` package exporting AppRouter and entity types.
+</objective>
+
+<execution_context>
+@~/.claude/get-shit-done/workflows/execute-plan.md
+@~/.claude/get-shit-done/templates/summary.md
+</execution_context>
+
+<context>
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+
+# Existing types to export
+@src/trpc/router.ts
+@src/db/schema.ts
+</context>
+
+<tasks>
+
+<task type="auto">
+  <name>Task 1: Create shared types package</name>
+  <files>packages/shared/package.json, packages/shared/tsconfig.json, packages/shared/src/index.ts, packages/shared/src/trpc.ts, packages/shared/src/types.ts, package.json</files>
+  <action>
+1. Create `packages/shared/` directory.
+
+2. Create `packages/shared/package.json`:
+   - name: `@codewalk-district/shared`
+   - type: module
+   - main: `./src/index.ts` (no build step — consumed via TypeScript project references)
+   - types: `./src/index.ts`
+   - exports: `{ ".": "./src/index.ts" }`
+
+3. Create `packages/shared/tsconfig.json`:
+   - Extends nothing (standalone)
+   - compilerOptions: target ES2022, module NodeNext, moduleResolution NodeNext, strict, declaration true, composite true, outDir dist
+   - include: `["src"]`
+
+4. Create `packages/shared/src/trpc.ts`:
+   - Re-export the AppRouter type from the backend:
+   ```typescript
+   export type { AppRouter } from '../../../src/trpc/router.js';
+   ```
+   This uses relative path since we're in the same git repo. The frontend will import `AppRouter` from `@codewalk-district/shared`.
+
+5. Create `packages/shared/src/types.ts`:
+   - Re-export entity types the frontend needs:
+   ```typescript
+   export type { Initiative, Phase, Plan, Task, Agent, Message } from '../../../src/db/schema.js';
+   ```
+   These are the Drizzle InferSelectModel types (read-only shapes).
+
+6. Create `packages/shared/src/index.ts`:
+   - Barrel export:
+   ```typescript
+   export type { AppRouter } from './trpc.js';
+   export type { Initiative, Phase, Plan, Task, Agent, Message } from './types.js';
+   ```
+
+7. Add `packages/shared` to root `package.json` workspaces array (should already include `"packages/*"` from Plan 01, but verify).
+
+8. Run `npm install` from root to link the shared package.
+
+NOTE: This package exports ONLY types (no runtime code). It exists solely so the frontend can `import type { AppRouter } from '@codewalk-district/shared'` without reaching into backend internals.
+  </action>
+  <verify>
+cd packages/shared && npx tsc --noEmit succeeds (types resolve correctly).
+From packages/web, importing `type { AppRouter } from '@codewalk-district/shared'` should resolve (test with a scratch file if needed, or just verify tsc).
+  </verify>
+  <done>AppRouter and entity types importable from @codewalk-district/shared. No build step needed — TypeScript resolves directly.</done>
+</task>
+
+</tasks>
+
+<verification>
+Before declaring plan complete:
+- [ ] `packages/shared/` exists with package.json, tsconfig.json, and src/
+- [ ] TypeScript compiles `packages/shared/` without errors
+- [ ] AppRouter type re-exported correctly
+- [ ] Entity types (Initiative, Phase, Task, etc.) re-exported correctly
+</verification>
+
+<success_criteria>
+
+- @codewalk-district/shared package exists and resolves
+- AppRouter type accessible to frontend consumers
+- Entity types accessible to frontend consumers
+- No runtime dependencies — types only
+  </success_criteria>
+
+<output>
+After completion, create `.planning/phases/16-frontend-scaffold/16-02-SUMMARY.md`
+</output>
diff --git a/.planning/phases/16-frontend-scaffold/16-03-PLAN.md b/.planning/phases/16-frontend-scaffold/16-03-PLAN.md
new file mode 100644
index 0000000..97977d8
--- /dev/null
+++ b/.planning/phases/16-frontend-scaffold/16-03-PLAN.md
@@ -0,0 +1,168 @@
+---
+phase: 16-frontend-scaffold
+plan: 03
+type: execute
+wave: 2
+depends_on: ["16-01", "16-02"]
+files_modified: [packages/web/package.json, packages/web/src/lib/trpc.ts, packages/web/src/main.tsx, packages/web/tsconfig.app.json]
+autonomous: true
+---
+
+<objective>
+Wire tRPC React Query client to connect the frontend to the existing backend server.
+
+Purpose: Enable type-safe data fetching from the Codewalk District backend. All subsequent UI screens (dashboard, detail, inbox) will use these tRPC hooks for data.
+Output: Working tRPC client with React Query provider, connected to backend via Vite dev proxy.
+</objective>
+
+<execution_context>
+@~/.claude/get-shit-done/workflows/execute-plan.md
+@~/.claude/get-shit-done/templates/summary.md
+</execution_context>
+
+<context>
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+
+# Backend server runs at 127.0.0.1:3847, tRPC at /trpc/*
+@src/server/index.ts
+
+# AppRouter type from shared package
+@packages/shared/src/trpc.ts
+
+# Vite project from Plan 01
+@packages/web/vite.config.ts
+@packages/web/src/main.tsx
+</context>
+
+<tasks>
+
+<task type="auto">
+  <name>Task 1: Install tRPC React Query dependencies</name>
+  <files>packages/web/package.json, packages/web/tsconfig.app.json</files>
+  <action>
+1. Install in packages/web:
+   - Dependencies: `@trpc/client`, `@trpc/react-query`, `@tanstack/react-query`
+   - Add `@codewalk-district/shared` as a workspace dependency: `"@codewalk-district/shared": "*"`
+
+2. Update `packages/web/tsconfig.app.json`:
+   - Add project reference to shared package: `"references": [{ "path": "../shared" }]`
+   - Ensure paths can resolve `@codewalk-district/shared` (npm workspaces handles this via node_modules symlink)
+
+3. Run `npm install` from root.
+  </action>
+  <verify>npm ls @trpc/react-query --workspace=packages/web shows installed version.</verify>
+  <done>tRPC and React Query packages installed. Shared package linked.</done>
+</task>
+
+<task type="auto">
+  <name>Task 2: Create tRPC client and provider</name>
+  <files>packages/web/src/lib/trpc.ts, packages/web/src/main.tsx</files>
+  <action>
+1. Create `packages/web/src/lib/trpc.ts`:
+   ```typescript
+   import { createTRPCReact } from '@trpc/react-query';
+   import { httpBatchLink } from '@trpc/client';
+   import type { AppRouter } from '@codewalk-district/shared';
+
+   export const trpc = createTRPCReact<AppRouter>();
+
+   export function createTRPCClient() {
+     return trpc.createClient({
+       links: [
+         httpBatchLink({
+           // In dev, Vite proxy forwards /trpc to backend
+           // In prod, same-origin or configured URL
+           url: '/trpc',
+         }),
+       ],
+     });
+   }
+   ```
+
+2. Update `packages/web/src/main.tsx` to wrap App with providers:
+   ```typescript
+   import React, { useState } from 'react';
+   import ReactDOM from 'react-dom/client';
+   import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
+   import { trpc, createTRPCClient } from './lib/trpc';
+   import App from './App';
+   import './index.css';
+
+   function Root() {
+     const [queryClient] = useState(() => new QueryClient({
+       defaultOptions: {
+         queries: {
+           refetchOnWindowFocus: false,
+           retry: 1,
+         },
+       },
+     }));
+     const [trpcClient] = useState(createTRPCClient);
+
+     return (
+       <trpc.Provider client={trpcClient} queryClient={queryClient}>
+         <QueryClientProvider client={queryClient}>
+           <App />
+         </QueryClientProvider>
+       </trpc.Provider>
+     );
+   }
+
+   ReactDOM.createRoot(document.getElementById('root')!).render(
+     <React.StrictMode>
+       <Root />
+     </React.StrictMode>
+   );
+   ```
+
+3. Update `packages/web/src/App.tsx` to verify tRPC works:
+   ```typescript
+   import { trpc } from './lib/trpc';
+
+   function App() {
+     const health = trpc.health.useQuery();
+
+     return (
+       <div className="p-8">
+         <h1 className="text-2xl font-bold">Codewalk District</h1>
+         <p className="text-muted-foreground mt-2">
+           Server: {health.data?.status ?? 'connecting...'}
+         </p>
+       </div>
+     );
+   }
+
+   export default App;
+   ```
+
+This App component is temporary — Phase 17+ will replace it. It exists to prove the tRPC connection works end-to-end.
+  </action>
+  <verify>
+cd packages/web && npx vite build succeeds (type-checks tRPC client against AppRouter).
+  </verify>
+  <done>tRPC client created with httpBatchLink. React Query provider wraps app. Build passes with type-safe router inference.</done>
+</task>
+
+</tasks>
+
+<verification>
+Before declaring plan complete:
+- [ ] `cd packages/web && npx vite build` succeeds
+- [ ] `trpc.health.useQuery()` type-checks correctly
+- [ ] tRPC client configured with `/trpc` URL (proxied by Vite in dev)
+- [ ] React Query provider configured with sensible defaults
+</verification>
+
+<success_criteria>
+
+- tRPC React Query client wired to AppRouter type
+- React Query provider wraps application
+- Build passes with full type inference
+- Vite proxy configured for /trpc → backend
+  </success_criteria>
+
+<output>
+After completion, create `.planning/phases/16-frontend-scaffold/16-03-SUMMARY.md`
+</output>
diff --git a/.planning/phases/16-frontend-scaffold/16-04-PLAN.md b/.planning/phases/16-frontend-scaffold/16-04-PLAN.md
new file mode 100644
index 0000000..9630266
--- /dev/null
+++ b/.planning/phases/16-frontend-scaffold/16-04-PLAN.md
@@ -0,0 +1,270 @@
+---
+phase: 16-frontend-scaffold
+plan: 04
+type: execute
+wave: 3
+depends_on: ["16-03"]
+files_modified: [packages/web/package.json, packages/web/src/App.tsx, packages/web/src/routeTree.gen.ts, packages/web/src/router.tsx, packages/web/src/routes/__root.tsx, packages/web/src/routes/index.tsx, packages/web/src/routes/initiatives/index.tsx, packages/web/src/routes/initiatives/$id.tsx, packages/web/src/routes/inbox.tsx, packages/web/src/layouts/AppLayout.tsx, packages/web/src/components/ui/button.tsx, packages/web/src/components/ui/badge.tsx, packages/web/src/components/ui/card.tsx, packages/web/src/components/ui/dropdown-menu.tsx]
+autonomous: true
+---
+
+<objective>
+Set up TanStack Router with page stubs and the app shell layout (navigation bar) matching the wireframe header.
+
+Purpose: Establish the navigation structure and persistent layout that all subsequent screens plug into. Phase 17-19 will implement the actual page content; this plan creates the skeleton they slot into. TanStack Router provides fully type-safe routing with validated params and search params.
+Output: Working router with 3 page stubs (Dashboard, Initiative Detail, Inbox) and persistent nav header.
+</objective>
+
+<execution_context>
+@~/.claude/get-shit-done/workflows/execute-plan.md
+@~/.claude/get-shit-done/templates/summary.md
+</execution_context>
+
+<context>
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+
+# Wireframe navigation structure
+@docs/wireframes/initiative-dashboard.md
+
+# tRPC client from Plan 03
+@packages/web/src/lib/trpc.ts
+@packages/web/src/main.tsx
+</context>
+
+<tasks>
+
+<task type="auto">
+  <name>Task 1: Install TanStack Router and add shadcn/ui base components</name>
+  <files>packages/web/package.json, packages/web/src/components/ui/button.tsx, packages/web/src/components/ui/badge.tsx, packages/web/src/components/ui/card.tsx, packages/web/src/components/ui/dropdown-menu.tsx</files>
+  <action>
+1. Install in packages/web:
+   - Dependencies: `@tanstack/react-router`
+   - Dev dependencies: `@tanstack/router-plugin` (Vite plugin for route generation), `@radix-ui/react-dropdown-menu`, `@radix-ui/react-slot` (shadcn/ui primitives)
+
+2. Update `packages/web/vite.config.ts` to add the TanStack Router Vite plugin:
+   ```typescript
+   import { TanStackRouterVite } from '@tanstack/router-plugin/vite'
+
+   export default defineConfig({
+     plugins: [
+       TanStackRouterVite(),
+       react(),
+     ],
+     // ... existing proxy config
+   })
+   ```
+   The TanStack Router plugin must come BEFORE the react plugin. It auto-generates the route tree from the file-based routes in `src/routes/`.
+
+3. Add the 4 most-needed shadcn/ui components. Use `npx shadcn@latest add button badge card dropdown-menu` from packages/web directory. If the CLI doesn't work with this directory structure, manually create the component files following the shadcn/ui source (available at ui.shadcn.com).
+
+   The components go in `packages/web/src/components/ui/`:
+   - `button.tsx` — needed by every page (View, Spawn, Queue, etc.)
+   - `badge.tsx` — needed for StatusBadge component
+   - `card.tsx` — needed for InitiativeCard
+   - `dropdown-menu.tsx` — needed for ActionMenu and SpawnArchitectDropdown
+
+   These are the foundation components. Additional shadcn components will be added in later phases as needed.
+
+4. Run `npm install` from root.
+  </action>
+  <verify>
+cd packages/web && npx vite build succeeds.
+Component files exist in packages/web/src/components/ui/.
+  </verify>
+  <done>TanStack Router and shadcn/ui base components installed.</done>
+</task>
+
+<task type="auto">
+  <name>Task 2: Create file-based routes, app shell layout, and page stubs</name>
+  <files>packages/web/src/App.tsx, packages/web/src/router.tsx, packages/web/src/routes/__root.tsx, packages/web/src/routes/index.tsx, packages/web/src/routes/initiatives/index.tsx, packages/web/src/routes/initiatives/$id.tsx, packages/web/src/routes/inbox.tsx, packages/web/src/layouts/AppLayout.tsx</files>
+  <action>
+1. Create file-based route structure in `packages/web/src/routes/`:
+
+   TanStack Router uses file-based routing. The Vite plugin generates `routeTree.gen.ts` automatically from the file structure:
+
+   - `__root.tsx` — Root layout route (wraps all pages with AppLayout)
+   - `index.tsx` — `/` route, redirects to `/initiatives`
+   - `initiatives/index.tsx` — `/initiatives` DashboardPage
+   - `initiatives/$id.tsx` — `/initiatives/$id` InitiativeDetailPage (type-safe param)
+   - `inbox.tsx` — `/inbox` InboxPage
+
+2. Create `packages/web/src/routes/__root.tsx`:
+   The root route wraps all pages with the AppLayout shell:
+   ```typescript
+   import { createRootRoute, Outlet } from '@tanstack/react-router'
+   import { AppLayout } from '../layouts/AppLayout'
+
+   export const Route = createRootRoute({
+     component: () => (
+       <AppLayout>
+         <Outlet />
+       </AppLayout>
+     ),
+     notFoundComponent: () => (
+       <div className="p-8 text-center">
+         <h1 className="text-2xl font-bold">Page not found</h1>
+         <p className="text-muted-foreground mt-2">The page you're looking for doesn't exist.</p>
+       </div>
+     ),
+   })
+   ```
+
+3. Create `packages/web/src/routes/index.tsx`:
+   Redirect root `/` to `/initiatives`:
+   ```typescript
+   import { createFileRoute, redirect } from '@tanstack/react-router'
+
+   export const Route = createFileRoute('/')({
+     beforeLoad: () => {
+       throw redirect({ to: '/initiatives' })
+     },
+   })
+   ```
+
+4. Create `packages/web/src/routes/initiatives/index.tsx`:
+   Dashboard stub:
+   ```typescript
+   import { createFileRoute } from '@tanstack/react-router'
+   import { trpc } from '../../lib/trpc'
+
+   export const Route = createFileRoute('/initiatives/')({
+     component: DashboardPage,
+   })
+
+   function DashboardPage() {
+     const health = trpc.health.useQuery()
+     return (
+       <div>
+         <h1 className="text-2xl font-bold">Initiative Dashboard</h1>
+         <p className="text-muted-foreground mt-2">
+           Server: {health.data?.status ?? 'connecting...'}
+         </p>
+         <p className="text-muted-foreground mt-1">Content coming in Phase 17</p>
+       </div>
+     )
+   }
+   ```
+
+5. Create `packages/web/src/routes/initiatives/$id.tsx`:
+   Detail stub with type-safe params:
+   ```typescript
+   import { createFileRoute } from '@tanstack/react-router'
+
+   export const Route = createFileRoute('/initiatives/$id')({
+     component: InitiativeDetailPage,
+   })
+
+   function InitiativeDetailPage() {
+     const { id } = Route.useParams()
+     return (
+       <div>
+         <h1 className="text-2xl font-bold">Initiative Detail</h1>
+         <p className="text-muted-foreground mt-2">Initiative ID: {id}</p>
+         <p className="text-muted-foreground mt-1">Content coming in Phase 18</p>
+       </div>
+     )
+   }
+   ```
+
+6. Create `packages/web/src/routes/inbox.tsx`:
+   Inbox stub:
+   ```typescript
+   import { createFileRoute } from '@tanstack/react-router'
+
+   export const Route = createFileRoute('/inbox')({
+     component: InboxPage,
+   })
+
+   function InboxPage() {
+     return (
+       <div>
+         <h1 className="text-2xl font-bold">Agent Inbox</h1>
+         <p className="text-muted-foreground mt-1">Content coming in Phase 19</p>
+       </div>
+     )
+   }
+   ```
+
+7. Create `packages/web/src/layouts/AppLayout.tsx`:
+   The persistent navigation shell from the wireframe header:
+   ```
+   CODEWALK DISTRICT                                    [+ New Initiative]
+   Initiatives    Agents    Tasks    Settings
+   ```
+   Implementation:
+   - Header with app title "Codewalk District" on the left
+   - "New Initiative" button on the right (placeholder handler for now)
+   - Navigation tabs: Initiatives (links to /initiatives), Inbox (links to /inbox)
+   - Skip "Agents", "Tasks", "Settings" tabs for now — not in Phase 16-19 scope. Include them as disabled/greyed out.
+   - Use `Link` from `@tanstack/react-router` for navigation links
+   - Active nav item highlighted using `activeProps` or `activeOptions` on Link
+   - Children rendered via props.children (passed from root route Outlet)
+   - Minimal Tailwind styling: fixed header, content below with padding
+
+8. Create `packages/web/src/router.tsx`:
+   ```typescript
+   import { createRouter } from '@tanstack/react-router'
+   import { routeTree } from './routeTree.gen'
+
+   export const router = createRouter({ routeTree })
+
+   declare module '@tanstack/react-router' {
+     interface Register {
+       router: typeof router
+     }
+   }
+   ```
+
+9. Update `packages/web/src/App.tsx`:
+   Replace the temporary health-check component with the router:
+   ```typescript
+   import { RouterProvider } from '@tanstack/react-router'
+   import { router } from './router'
+
+   function App() {
+     return <RouterProvider router={router} />
+   }
+
+   export default App
+   ```
+
+10. Run `cd packages/web && npx vite build` — the TanStack Router plugin will generate `routeTree.gen.ts` during the build. The generated file should be committed to git (it's a type-safe route manifest).
+
+Keep it simple. These are stubs — the real UI comes in Phases 17-19. The goal is a working navigation skeleton with the right route structure.
+  </action>
+  <verify>
+cd packages/web && npx vite build succeeds.
+routeTree.gen.ts generated with routes: /, /initiatives, /initiatives/$id, /inbox.
+AppLayout renders header and child content.
+  </verify>
+  <done>TanStack Router configured with file-based routes. App shell layout renders nav header. Page stubs in place for Phases 17-19 to fill in.</done>
+</task>
+
+</tasks>
+
+<verification>
+Before declaring plan complete:
+- [ ] `cd packages/web && npx vite build` succeeds
+- [ ] Route `/initiatives` renders DashboardPage stub
+- [ ] Route `/initiatives/some-id` renders InitiativeDetailPage stub with type-safe param
+- [ ] Route `/inbox` renders InboxPage stub
+- [ ] AppLayout nav header present on all pages
+- [ ] Active nav item highlighted
+- [ ] routeTree.gen.ts generated
+</verification>
+
+<success_criteria>
+
+- TanStack Router configured with file-based routes
+- Type-safe params on /initiatives/$id route
+- AppLayout shell matches wireframe header structure
+- Page stubs ready for Phase 17-19 implementation
+- Navigation between pages works
+- Build passes cleanly
+  </success_criteria>
+
+<output>
+After completion, create `.planning/phases/16-frontend-scaffold/16-04-SUMMARY.md`
+</output>
diff --git a/.planning/phases/16-frontend-scaffold/16-05-PLAN.md b/.planning/phases/16-frontend-scaffold/16-05-PLAN.md
new file mode 100644
index 0000000..f5211c5
--- /dev/null
+++ b/.planning/phases/16-frontend-scaffold/16-05-PLAN.md
@@ -0,0 +1,91 @@
+---
+phase: 16-frontend-scaffold
+plan: 05
+type: execute
+wave: 3
+depends_on: ["16-04"]
+files_modified: [packages/web/src/App.tsx]
+autonomous: false
+---
+
+<objective>
+Verify the complete frontend scaffold works end-to-end with the running backend.
+
+Purpose: Confirm that the Vite dev server, tRPC client, TanStack Router, Tailwind, and shadcn/ui all work together before proceeding to build actual UI screens.
+Output: Verified working scaffold ready for Phase 17 (Initiative Dashboard).
+</objective>
+
+<execution_context>
+@~/.claude/get-shit-done/workflows/execute-plan.md
+@~/.claude/get-shit-done/templates/summary.md
+@~/.claude/get-shit-done/references/checkpoints.md
+</execution_context>
+
+<context>
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+
+# All scaffold pieces
+@packages/web/src/main.tsx
+@packages/web/src/App.tsx
+@packages/web/src/router.tsx
+@packages/web/src/routes/__root.tsx
+@packages/web/src/layouts/AppLayout.tsx
+@packages/web/vite.config.ts
+</context>
+
+<tasks>
+
+<task type="auto">
+  <name>Task 1: Verify build and type-check</name>
+  <files>packages/web/src/App.tsx</files>
+  <action>
+1. Run full build from root: `npm run build` (should build the backend). Then `cd packages/web && npx vite build` (should build frontend).
+2. Run TypeScript type-check on shared package: `cd packages/shared && npx tsc --noEmit`
+3. Verify no TypeScript errors across the entire project.
+4. If any errors, fix them.
+  </action>
+  <verify>
+All three commands succeed with zero errors.
+  </verify>
+  <done>Full project builds cleanly. No type errors.</done>
+</task>
+
+<task type="checkpoint:human-verify" gate="blocking">
+  <what-built>Complete frontend scaffold with Vite + React + tRPC + Tailwind + shadcn/ui + TanStack Router</what-built>
+  <how-to-verify>
+    1. Start backend: `cw --server` (or however the server starts)
+    2. Start frontend: `npm run dev:web`
+    3. Visit: http://localhost:5173 (Vite default port)
+    4. Verify: Navigation header shows "Codewalk District" with nav tabs
+    5. Click "Initiatives" tab → should show dashboard stub
+    6. Click "Inbox" tab → should show inbox stub
+    7. Verify: Tailwind styling renders (text should be styled, not raw HTML)
+    8. Check browser console: No errors
+    9. If backend is running: DashboardPage should show "Server: ok" from tRPC health check
+  </how-to-verify>
+  <resume-signal>Type "approved" or describe issues to fix</resume-signal>
+</task>
+
+</tasks>
+
+<verification>
+Before declaring plan complete:
+- [ ] Full build succeeds (backend + frontend)
+- [ ] No TypeScript errors
+- [ ] Visual verification passed
+</verification>
+
+<success_criteria>
+
+- Complete scaffold builds and runs
+- tRPC connection works (health check shows server status)
+- Navigation works between all routes
+- Tailwind styling renders correctly
+- Human verified visual correctness
+  </success_criteria>
+
+<output>
+After completion, create `.planning/phases/16-frontend-scaffold/16-05-SUMMARY.md`
+</output>