Accounting & Invoice Automation
Auto-generate invoices from spreadsheets with idempotency control and retry mechanisms
Automated Invoice & Delivery-Note PDFs — Documents as Code
Breaking free from template files: generating invoice and delivery-note PDFs in code, from Japanese text support to storage
Japanese Font Embedding and File-Size Optimization
Taming the hardest part of Japanese PDFs — reliable, lightweight font embedding via subsetting
Managing Sender and Recipient Profile Masters
Mastering biller and recipient data so per-document input stays minimal
Storing Generated PDFs and Designing Reissue
Object-storage persistence and a mechanism to reissue the exact same document anytime
Other Topics
Spreadsheet as the Central Input Hub
Design approach to automatically generate invoices from spreadsheets without changing existing workflows
Bidirectional Data Utilization
Not just creating invoices, but also retrieving and analyzing created data
Security Design for Safe Operations
Defense-in-depth security architecture that small businesses can trust
System Resilient to Retries
Duplicate prevention and auto-retry design for easy recovery from operational errors
Smooth Handling of Large Data Volumes
Design for efficiently processing hundreds of records during month-end aggregation
Easy Deployment and Operations
Design enabling auto-deployment to cloud and scalability
Other Categories
AI Agent Solutions & Business Automation
Practical LLM-powered solutions — AI-OCR order intake, reply drafting for support tickets, a daily research agent, and AI-driven product concierge
Headless EC with Shopify
Shopify Storefront API, Next.js ISR, member pricing - fast and flexible headless EC site design
HubSpot CRM/CMS Setup & External Integration
From HubSpot implementation to custom API integrations beyond standard connectors and external tool integrations
POS & Omnichannel Integration
Unifying online and offline customer data for seamless customer experience
Order Management Integration
Bidirectional sync with order management systems and secure OAuth-based API integration
AI-Powered Site Development & Deployment
Non-engineer-friendly workflow for publishing and managing sites using Claude Code × GitHub × Vercel
Other Solutions & Ideas
Business improvement and problem-solving ideas and project examples that don't fit specific categories