TextMate (Frontend)

https://github.com/user-attachments/assets/ec0416b2-a3dc-48df-8ec5-554d0f59f391

TextMate is a modern web application for advanced text editing, AI-assisted text transformation, and document validation. Built with Nuxt 4 and TypeScript, it provides a rich set of tools to enhance writing quality, simplify text, and validate against organizational standards.

This repository contains the frontend application; the backend is built with Python FastAPI and available at https://github.com/DCC-BS/text-mate-backend.

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DCC Documentation & Guidelines | DCC Website

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Features

Core Capabilities

• Ribbon Interface: Intuitive ribbon toolbar with dedicated tabs for text transformation and document validation.
• Text Rewriting: Alternative phrasings with customizable writing styles (Simple, Professional, Casual, Academic, Technical), target audiences, and goals.
• Simplify / Plain Language: AI-assisted simplification of complex sentences and long words (Einfache Sprache) with interactive range navigation.
• Document Advisor: Validates text against selected reference documents and guidelines, with side-by-side PDF preview and inline fix suggestions.
• Interactive Diff Review: Side-by-side diff preview to review, accept, or reject generated changes before applying them.
• Word Synonyms & Sentence Alternatives: Inline context-aware synonym and phrasing suggestions directly within the editor.
• Text Statistics & Readability: Real-time word and character counting (with Swiss apostrophe formatting, e.g. 100'000), syllable counts, average sentence length, Flesch score, and CEFR language level visualization.
• User Dictionary & Custom Actions: Personal dictionary for specialized vocabulary and custom prompt-driven actions.
• Document Import & Export: File upload (.docx, .txt) and direct export to Microsoft Word (.docx).
• Multilingual Support: Full German (de-CH) and English interface, with multi-language detection.

Quick Actions & Transformations

Specialized AI-powered text transformations available in the ribbon:

• Summarize: Generate concise summaries of long texts
• Bullet Points: Convert paragraphs into structured bullet points
• Shorten: Condense content while preserving core message
• Formality: Adjust formality (formal / informal)
• Medium Length: Adapt text for medium-length output
• Social Media: Optimize content for social media channels
• Proofread: Check and correct grammar, spelling, and style
• Character Speech: Adapt text to character voices and dialogue patterns
• Custom Actions: Run personalized custom text transformations

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Technology Stack

• Framework: Nuxt 4 (Vue 3 Composition API with <script setup lang="ts">)
• UI & Styling: Nuxt UI v4 & Tailwind CSS v4
• Icons: Lucide Icons via @iconify-json/lucide
• Rich Text Editor: Tiptap v3
• State Management: Pinia
• Environment & Secrets: Varlock with Proton Pass plugin
• Package Manager: Bun
• Tool Version Manager: Mise
• Linter & Formatter: Biome
• Testing: Vitest (Unit) & Playwright (E2E)

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Setup

Prerequisites

We recommend using mise to automatically manage tool versions (Bun, Node.js, Varlock, pass-cli):

mise install

Environment Configuration

Create a .env file in the project root with the basic environment mode:

APP_MODE=dev      # dev, ci, build, prod
AUTH_MODE=none    # none or azure

Environment Variables

Environment variables are validated using Varlock schemas (.env.schema, .env.runtime.schema, .env.buildtime.schema, .env.azure.schema):

Variable	Description	Default	Type
Core Configuration
APP_MODE	Application runtime mode (dev, ci, build, prod)	dev	enum
AUTH_MODE	Authentication mode (none, azure)	none	enum
USE_FEEDBACK	Enable feedback widget	true (non-CI)	boolean
DUMMY	Enable mock API mode (no backend required)	false	boolean
Backend & Services
API_PORT	Backend API port	8000	port
NUXT_API_URL	Backend API URL	http://localhost:8000 (dev)	URL
NUXT_FEEDBACK_GITHUB_TOKEN	GitHub token for feedback reporting	Proton Pass (dev)	string (sensitive)
NUXT_PUBLIC_LOGGER_LOG_LEVEL	Client log level	debug (dev), info (prod)	enum
LOG_LEVEL	Server log level	debug (dev), info (prod)	enum
UI & Onboarding Flags
DISABLE_ONBOARDING	Disable onboarding tour (e.g. in tests)	false	boolean
NUXT_PUBLIC_COMMON_UI_DISABLE_CHANGELOG	Disable changelog modal	false	boolean
NUXT_PUBLIC_COMMON_UI_DISABLE_DISCLAIMER	Disable disclaimer banner	false	boolean
NUXT_PUBLIC_COMMON_UI_DISABLE_ONBOARDING	Disable onboarding popup	false	boolean
NUXT_PUBLIC_COMMON_UI_DISABLE_SYSTEM_STATUS	Disable backend health indicator	false	boolean
NUXT_PUBLIC_APP_CONFIG_APP_LIST_URL_TEMPLATE	App switcher template URL	http://{APP_NAME}.localhost.ch	string

Azure AD Configuration (When AUTH_MODE=azure)

Variable	Description	Default	Type
NUXT_AZURE_AUTH_SECRET	Session encryption secret (openssl rand -base64 32)	-	string (sensitive, required)
NUXT_AZURE_AUTH_CLIENT_ID	Azure AD client ID	Proton Pass (dev)	UUID
NUXT_AZURE_AUTH_TENANT_ID	Azure AD tenant ID	Proton Pass (dev)	UUID
NUXT_AZURE_AUTH_CLIENT_SECRET	Azure AD client secret	Proton Pass (dev)	string (sensitive)
NUXT_AZURE_AUTH_API_CLIENT_ID	Azure AD API client ID	Proton Pass (dev)	UUID
NUXT_AZURE_AUTH_ORIGIN	Auth callback origin URL	http://localhost:3000/api/auth	URL

Varlock & Secrets Management

We use varlock for schema-based validation and optional secret retrieval from Proton Pass:

# Validate and load secrets into the environment
mise run env

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Development

Start the development server at http://localhost:3000:

# Using mise
mise run dev

# Or using bun directly
bun run dev

Development with Inspector

mise run debug

Dummy Mode (Offline / Mock Data)

Run the frontend with mocked backend responses (no Python backend or LLM required):

mise run dummy

Automation / CI Mode

Start the dev server with popups (changelog, disclaimer, onboarding) disabled:

mise run automation

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Backend & Docker Services

For full functionality with AI models and backend API, the backend services can be run via Docker:

Start Backend Services Only

mise run docker:up

Stop Backend Services

mise run docker:down

Full Stack Compose

To run all services (frontend, backend, vLLM, and Nginx reverse proxy):

cd docker
varlock run -- docker compose up

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Project Architecture

app/
├── assets/
│   ├── css/                # Main Tailwind CSS styles
│   └── models/             # TypeScript models & command bus definitions
├── components/             # Vue components (PascalCase)
│   ├── advisor/            # Document advisor & PDF preview
│   ├── diff/               # Diff review & comparison
│   ├── editor/             # Tiptap text editor & toolbar
│   ├── rewrite/            # Text rewrite & custom action forms
│   ├── ribbon/             # Ribbon bar navigation & action tabs
│   ├── simplify/           # Plain language / simplify UI
│   └── tool-panel/         # Text stats, readability & dictionary
├── composables/            # Reactive Vue composables (useXxx)
├── pages/                  # Route pages (kebab-case)
├── services/               # API & business logic services
└── utils/                  # Framework-agnostic utilities
server/
├── api/                    # Nitro API endpoints (kebab-case)
└── plugins/                # Server plugins
shared/
└── types/                  # Shared TypeScript types (client & server)
tests/
├── assets/                 # Vitest unit tests (*.test.ts)
└── e2e/                    # Playwright E2E tests (*.spec.ts)

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Testing & Quality Assurance

Unit Tests (Vitest)

# Run all unit tests
mise run test

# Run tests in watch mode
mise run test:watch

# Run with coverage report
mise run test:coverage

# Run a single test file
bunx vitest run tests/assets/utils/formatNumber.test.ts

Type Checking & Linting

# TypeScript strict type check
mise run tsc

# Biome code formatting
mise run lint

# Biome check & autofix
mise run check

End-to-End Tests (Playwright)

# Run all E2E tests
mise run test:e2e

# Run with Playwright interactive UI
mise run test:e2e:ui

# Generate tests via Playwright codegen
mise run e2e:codegen

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Production Build & Deployment

Build & Preview

# Build production bundle
mise run build

# Preview production build locally
mise run preview

Docker Deployment

Build and run using the multi-stage Dockerfile:

# Build Docker image
docker build -t text-mate-frontend .

# Run container
docker run -p 3000:3000 text-mate-frontend

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Dependency Overrides

We maintain strict, minimal overrides in package.json exclusively for Framework Singletons:

• vue (3.5.41), reka-ui (2.10.1), @vueuse/core (^14.4.0), prosemirror-model (1.25.11), prosemirror-view (1.42.2): Deduplicates runtime instances across transitive dependencies (such as vaul-vue and Tiptap plugins) to prevent dual-instance SSR hydration crashes and broken editor instanceof selections.

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Acknowledgements & Credits

Special thanks to the following open-source projects and initiatives that inspired and contributed to TextMate:

• machinelearningZH / simply-simplify-language: The foundational idea for AI-assisted text simplification stems from machinelearningZH's work.
• blokkli / editor (MIT License): Built upon the simplification concept, integrated Lunaris formulation for multilingual readability metrics, and introduced the agentic pipeline approach that inspired our own text simplification pipeline.
• @lunarisapp/readability & @lunarisapp/language (MIT License): Used for calculating readability scores for English (EN), Italian (IT), and French (FR).
• zix (Zurich Understandability Index) (MIT License): Used to calculate German (DE) readability scores.

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License

MIT © Data Competence Center Basel-Stadt

Datenwissenschaften und KI
Developed with ❤️ by DCC - Data Competence Center