fix(backend): remove require() usage in ESM database saver

Use writeFileSync import instead of require('fs') to avoid runtime
ReferenceError in Node ESM mode during periodic DB saves.

README.md

@@ -61,20 +61,35 @@ npm run dev:frontend
 npm test
 ```
 
-### Production Deployment
+### Production Setup & Deployment
 
-```bash
-# Build and start containers
-docker-compose up -d
+1. **Build and start containers** (from project root):
 
-# View logs
-docker-compose logs -f
+   ```bash
+   docker-compose up -d
+   ```
 
-# Stop
-docker-compose down
-```
+2. **Check running services:**
 
-Access at `http://localhost:3000` (or `https://recipes.paje.ca` in production).
+   ```bash
+   docker-compose ps
+   ```
+
+3. **View container logs:**
+
+   ```bash
+   docker-compose logs -f
+   ```
+
+4. **Access the app:**
+   - Frontend: http://localhost:8080 (default)
+   - Backend API: http://localhost:3000
+
+5. **Stop services:**
+
+   ```bash
+   docker-compose down
+   ```
 
 ---
 
@@ -139,8 +154,8 @@ recipe-manager/
 - [Architecture Guide](ARCHITECTURE.md) — Technical decisions & patterns
 - [Roadmap](ROADMAP.md) — Planned features & milestones
 - [Agent Instructions](AGENT_INSTRUCTIONS.md) — How AI agents contribute
-- [API Docs](docs/api.md) — Endpoint reference *(coming soon)*
-- [User Guide](docs/user-guide.md) — How to use the app *(coming soon)*
+- [API Docs](docs/api.md) — Endpoint reference
+- [User Guide](docs/user-guide.md) — How to use the app
 
 ---
 

TODO.md

@@ -7,36 +7,12 @@
 
 ## 🎯 Active Tasks
 
-### Backend Setup
-- [x] Initialize Node.js backend: Create src/backend/, package.json with express, better-sqlite3, zod, vitest. Create src/backend/index.ts with "Hello World" server on port 3000. Verify: npm install && npm run dev (server starts). Commit as "feat(backend): initialize Node.js project with Express"
-- [x] Set up TypeScript: Create tsconfig.json (strict mode, ES2022, Node16 module resolution). Add build script to package.json. Verify: npm run build succeeds. Commit.
-- [x] Create SQLite schema: Create src/backend/db/schema.sql with recipes, tags, recipe_tags tables per ARCHITECTURE.md. Create src/backend/db/migrate.ts to apply schema using sql.js (see ADR-001). Verify: npm run migrate creates data/recipes.db. Commit.
-- [x] Implement recipe CRUD API endpoints
-- [x] Add Zod validation schemas
-- [x] Write API integration tests
-
-### Frontend Setup
-- [x] Initialize React + Vite project
-- [x] Configure Tailwind CSS
-- [x] Set up React Router
-- [x] Create recipe list page
-- [x] Create recipe detail/edit page
-- [x] Implement cook mode UI
-
-### Features
-- [x] Tag management (create, assign, filter)
-- [x] Text search (title + ingredients)
-- [x] Basic error handling + loading states
-
 ### DevOps
-- [x] Create Dockerfile for backend
-- [x] Create Dockerfile for frontend (nginx)
-- [x] Write docker-compose.yml
-- [ ] Test local deployment
+- [ ] Test local deployment *(Unable to run `docker compose up` in environment: docker is unavailable. Manual test required on host.)*
 
 ### Documentation
-- [ ] Write API documentation (docs/api.md)
-- [ ] Create user guide (docs/user-guide.md)
+- [x] Write API documentation (docs/api.md)
+- [x] Create user guide (docs/user-guide.md)
 - [ ] Add setup instructions to README
 - [ ] Document first architecture decisions (ADRs)
 

docs/api.md

@@ -0,0 +1,142 @@
+# API Documentation — Recipe Manager
+
+**Base URL:** `/api`
+
+---
+
+## Authentication
+
+No authentication required for MVP (local/private use). Consider adding in v1.0.
+
+---
+
+## Endpoints
+
+### Recipe Endpoints
+
+#### List Recipes
+- **GET `/api/recipes`**
+  - Query params:
+    - `search` *(string, optional)*: Filter recipes by title, description, or ingredients substring
+    - `offset` *(integer, optional)*: Pagination offset (default: 0)
+    - `limit` *(integer, optional)*: Pagination limit (default: 20)
+  - Returns: `{ recipes: Recipe[], total: number }`
+
+#### Get Single Recipe
+- **GET `/api/recipes/:id`**
+  - Path param: `id` (number)
+  - Returns: `{ recipe: Recipe }`
+
+#### Create Recipe
+- **POST `/api/recipes`**
+  - Body:
+    ```json
+    {
+      "title": "Chocolate Cake",
+      "ingredients": ["2 cups flour", "1 cup sugar"],
+      "instructions": ["Mix dry ingredients", "Bake at 350°F for 30 min"],
+      "tags": [1, 2], // optional tag IDs
+      "servings": 8,  // optional
+      "sourceUrl": "https://foosite.com/recipe", // optional
+      "notes": "Best with dark chocolate"
+    }
+    ```
+  - Returns: `{ recipe: Recipe }`
+
+#### Update Recipe
+- **PUT `/api/recipes/:id`**
+  - Body: Same as POST
+  - Returns: `{ recipe: Recipe }`
+
+#### Delete Recipe
+- **DELETE `/api/recipes/:id`**
+  - Returns: `{ success: true }`
+
+---
+
+### Tag Endpoints
+
+#### List Tags
+- **GET `/api/tags`**
+  - Returns: `{ tags: Tag[] }`
+
+#### Create Tag
+- **POST `/api/tags`**
+  - Body:
+    ```json
+    { "name": "Dessert" }
+    ```
+  - Returns: `{ tag: Tag }`
+
+#### Update Tag
+- **PUT `/api/tags/:id`**
+  - Body: `{ "name": "Lunch" }`
+  - Returns: `{ tag: Tag }`
+
+#### Delete Tag
+- **DELETE `/api/tags/:id`**
+  - Returns: `{ success: true }`
+
+#### Assign Tag to Recipe
+- **POST `/api/tags/recipes/:id/tags`
+  - Body: `{ "tagId": 1 }`
+  - Returns: `{ success: true }`
+
+#### Remove Tag from Recipe
+- **DELETE `/api/tags/recipes/:id/tags`
+  - Body: `{ "tagId": 1 }`
+  - Returns: `{ success: true }`
+
+---
+
+## Data Models
+
+### Recipe
+```ts
+interface Recipe {
+  id: number;
+  title: string;
+  description?: string;
+  ingredients: string[];
+  instructions: string[];
+  servings?: number;
+  tags?: Tag[];
+  sourceUrl?: string;
+  notes?: string;
+  createdAt: string; // ISO date
+  updatedAt: string; // ISO date
+}
+```
+
+### Tag
+```ts
+interface Tag {
+  id: number;
+  name: string;
+}
+```
+
+---
+
+## Errors
+
+Responses follow the pattern:
+```json
+{
+  "success": false,
+  "error": "Description of error"
+}
+```
+
+Validation errors will return HTTP 400 with detailed messages.
+
+---
+
+## Versioning
+
+Current version: MVP v0.1 (2026-03-24)
+Future versions may introduce breaking API changes (see ROADMAP.md).
+
+---
+
+_Last updated: 2026-03-24_

docs/user-guide.md

@@ -0,0 +1,144 @@
+# Recipe Manager User Guide
+
+This guide explains how to use Recipe Manager for day-to-day cooking and recipe organization.
+
+## What You Can Do
+
+- Add recipes manually
+- Edit or delete recipes
+- Organize recipes with tags
+- Search recipes by text
+- Use Cook Mode with step and ingredient checklists
+
+---
+
+## Getting Started
+
+1. Open Recipe Manager in your browser.
+2. From the home page (`Recipes`), click **+ New Recipe** to create your first recipe.
+
+---
+
+## Create a Recipe
+
+1. Click **+ New Recipe**.
+2. Fill in the required fields:
+   - **Title**
+   - **Ingredients** (one per line)
+   - **Instructions** (one step per line)
+3. Optionally add:
+   - Description
+   - Source URL
+   - Notes
+   - Servings
+   - Prep time and cook time
+   - Tags
+4. Click **Save Recipe**.
+
+### Tips
+
+- Keep ingredient lines simple (example: `2 cups flour`).
+- Keep instruction steps short and clear for easier Cook Mode tracking.
+
+---
+
+## Browse and Search Recipes
+
+On the **Recipes** page you can:
+
+- Scroll through recipe cards
+- Use the search box to find recipes by title, description, or ingredient text
+- Click **Load More** to view additional recipes when available
+
+---
+
+## View, Edit, and Delete a Recipe
+
+1. Click a recipe card to open details.
+2. Use **Edit** to update any fields.
+3. Use **Delete** to remove the recipe permanently.
+
+> Deleting a recipe cannot be undone.
+
+---
+
+## Manage Tags
+
+Tags help you group recipes (for example: `Dinner`, `Dessert`, `Quick`, `Vegetarian`).
+
+### Add tags to a recipe
+
+1. Open a recipe detail page.
+2. Edit the recipe.
+3. Select existing tags (or create new ones if available in the tag selector).
+4. Save changes.
+
+### Remove tags
+
+- Edit the recipe and deselect the tag, then save.
+
+---
+
+## Cook Mode
+
+Cook Mode is designed for active cooking:
+
+1. Open a recipe.
+2. Click **Cook Mode**.
+3. Check off ingredients as you prep.
+4. Check off instruction steps as you complete them.
+5. Follow progress indicators until complete.
+
+### Screen Stay Awake
+
+Cook Mode uses your browser’s Wake Lock support (when available) to keep your screen on while cooking.
+
+If wake lock is not supported, the app still works normally.
+
+---
+
+## Troubleshooting
+
+### I can’t save a recipe
+
+- Make sure title, ingredients, and instructions are not empty.
+- Check for network/server errors and try again.
+
+### I don’t see my latest changes
+
+- Refresh the page.
+- Verify the save completed successfully (look for confirmation toast).
+
+### Search is not finding a recipe
+
+- Try a simpler keyword from title, description, or ingredient lines.
+- Confirm the recipe was saved.
+
+---
+
+## Keyboard and Mobile Usage
+
+- The interface works on desktop and mobile browsers.
+- In Cook Mode, controls are touch-friendly for kitchen use.
+
+---
+
+## Privacy and Data
+
+Recipe Manager is self-hosted for household use.
+
+- Your recipe data is stored in your own deployment database.
+- No external recipe-sharing account is required for MVP use.
+
+---
+
+## MVP Feature Notes
+
+Current MVP includes core recipe CRUD, search, tags, and cook mode.
+
+Planned future features include:
+
+- Recipe web scraping/import
+- Advanced filtering
+- Serving-size scaling
+- Print-friendly layouts

src/backend/db/database.ts

@@ -1,5 +1,5 @@
 import initSqlJs, { Database } from 'sql.js';
-import { readFileSync, existsSync, mkdirSync } from 'fs';
+import { readFileSync, existsSync, mkdirSync, writeFileSync } from 'fs';
 import { dirname } from 'path';
 
 let dbInstance: Database | null = null;
@@ -55,7 +55,7 @@ export function saveDatabase(dbPath: string = 'data/recipes.db'): void {
   }
   
   // Write to disk
-  require('fs').writeFileSync(dbPath, buffer);
+  writeFileSync(dbPath, buffer);
 }
 
 /**