System Requirements Document (SRD) for lunar-todo

1. Introduction

This document outlines the system requirements for lunar-todo, a unique and tactile-inspired to-do list application envisioned by Hemen Ashodia. The app is designed to make task management fun and satisfying, drawing inspiration from the sensory joy of popping bubble wrap. The application will cater to users in India (IN) and globally, with a focus on simplicity, usability, and engagement.

2. System Overview

lunar-todo is a lightweight, three-page application designed to provide users with an intuitive and tactile experience for managing their tasks. The app will feature a bubble-wrap-inspired interface, making task completion a satisfying and engaging process. The system will support personal use and will be optimized for both web and mobile platforms.

The application will consist of the following three pages:

1. Main To-Do List Page: The core interface where users can view, add, and complete tasks.
2. Categories/Overview Page: A page to organize tasks into categories and view progress summaries.
3. Settings Page: A page to customize preferences, themes, and other app settings.

The system will prioritize simplicity, responsiveness, and a tactile user experience.

3. Functional Requirements

• As a User, I should be able to add tasks to my to-do list.
• As a User, I should be able to mark tasks as complete by interacting with a bubble-wrap-inspired interface.
• As a User, I should be able to delete tasks from my to-do list.
• As a User, I should be able to organize tasks into categories.
• As a User, I should be able to view a summary of my progress across categories.
• As a User, I should be able to customize the app's theme and tactile feedback settings.
• As a User, I should be able to navigate between the three pages: To-Do List, Categories/Overview, and Settings.

4. User Personas

1. Primary User:

   • Description: Individuals looking for a fun and engaging way to manage personal tasks.
   • Needs: A simple, visually appealing, and tactile interface for task management.
   • Goals: To stay organized while enjoying the process of completing tasks.

2. Secondary User:

   • Description: Casual users who may use the app occasionally for lightweight task management.
   • Needs: An intuitive interface that requires minimal setup or learning curve.
   • Goals: To quickly add and complete tasks without unnecessary complexity.

5. Visuals Colors and Theme

The visual design of lunar-todo will emphasize a playful and tactile aesthetic. The following color palette is proposed:

• Primary Color: Soft Lunar Blue (#A3C4F3) – to evoke calmness and focus.
• Secondary Color: Bubble White (#FFFFFF) – for a clean and minimal background.
• Accent Color: Pop Pink (#FF6F91) – for interactive elements like "popped" tasks.
• Highlight Color: Glow Yellow (#FFD700) – to draw attention to important elements like progress summaries.
• Shadow Color: Subtle Gray (#D3D3D3) – for depth and tactile effects.

The theme will include rounded, bubble-like UI elements to reinforce the bubble-wrap inspiration.

6. Signature Design Concept

The lunar-todo homepage will feature an interactive bubble-wrap-inspired interface that makes task completion a uniquely satisfying experience.

Key Features:

• Bubble Animation: Each task will appear as a bubble. When a user marks a task as complete, the bubble will "pop" with a subtle animation, sound effect, and haptic feedback (on mobile devices). The animation will include a ripple effect to mimic the sensation of popping bubble wrap.
• Dynamic Background: The background will subtly shift colors based on the time of day (e.g., Lunar Blue during the day and a darker Midnight Blue at night).
• Micro-Interactions: Hovering over a bubble will cause it to slightly inflate, creating a tactile anticipation effect.
• Progress Visualization: Completed tasks will float upwards and fade into a glowing "completed tasks" section, creating a sense of accomplishment.
• Playful Sound Design: Each pop will have a randomized, soft popping sound to keep the experience fresh and engaging.

This design will make the homepage of lunar-todo instantly memorable and delightful, encouraging users to return frequently.

7. Non-Functional Requirements

• The system shall be responsive and optimized for both web and mobile platforms.
• The system shall provide a seamless and lag-free user experience, with a maximum response time of 1 second for all interactions.
• The system shall support a minimum of 10,000 tasks per user without performance degradation.
• The system shall provide haptic feedback on supported mobile devices.
• The system shall be accessible, adhering to WCAG 2.1 AA standards.
• The system shall support localization for Indian users, including time zones (IST) and date formats (DD/MM/YYYY).

8. Tech Stack

Frontend:

• React for Web
• React Native for Mobile App

Backend:

• Python
• FastAPI

Database:

• MySQL (with Alembic for migrations)

AI Tools:

• Litellm for LLM Routing
• Langchain

Local Orchestration:

• Docker
• docker-compose

Server-Side Orchestration:

• Kubernetes

9. Assumptions and Constraints

• The application will initially target individual users and will not include team collaboration features.
• The system will be designed for simplicity and will not include advanced task management features like recurring tasks or integrations with external tools.
• The tactile feedback (haptic and sound) will be optional and configurable in the settings.
• The system will support English as the primary language, with potential for localization in future updates.

10. Glossary

• Bubble Animation: A visual effect where tasks appear as bubbles that "pop" when completed.
• Haptic Feedback: A tactile response provided by a device to simulate the sensation of touch.
• WCAG: Web Content Accessibility Guidelines, a set of standards for making web content accessible to people with disabilities.
• IST: Indian Standard Time, the time zone used in India.
• LLM Routing: The process of directing user queries to the most appropriate large language model for processing.

This document outlines the vision and requirements for lunar-todo, a tactile and engaging to-do list application. Hemen, your idea of a bubble-wrap-inspired interface is truly unique, and this SRD captures the essence of your vision while ensuring a delightful user experience.