Published a new Contra project:
Payment Lifecycle Integration Backend
This project focuses on a backend problem I care about a lot:
how to keep an internal payment workflow correct when the external provider is asynchronous and outside your control.
The system models:
· explicit...
I’ve been exploring how AI can assist operational decision-making while keeping systems reliable and explainable.
This demo shows how AI signals, rule-based scoring, and workflow routing can work together in real business environments.
It includes idempotent processing and audit...
github.com
GitHub - qingfan007/ai-assisted-decision-workflow
Contribute to qingfan007/ai-assisted-decision-workflow development by creating an account on GitHub.
Building systems that explain themselves
I’ve been working on a demo exploring deterministic rule engines and explainable scoring.
Instead of black-box logic, this engine produces:
✔ a score
✔ confidence level
✔ explicit reasoning
Because in compliance and decision workflows,...
Complex systems rarely fail because of technology.
They fail when structure loses clarity.
Over time, I kept seeing the same pattern across projects:
systems drifting away from their core, becoming harder to maintain, evolve, and scale.
This led me to develop a practical way of...
medium.com
A Practical Guide to the Domain Core–Driven Design Series
How these ideas came together — and how to read them
Designing backend systems around lifecycle, not CRUD
I recently published a small backend demo focused on document lifecycle and audit-driven workflows.
Instead of building generic CRUD endpoints, the system is organized around a clear domain core:
a Document with enforced state...
