Developer creating autonomous API version migration tool
“Successfully migrated a legacy LLM credit provisioning system from React/Vite frontend + Node/Express backend to unified Next.js app, achieving pixel-perfect UI recreation and correct backend logic implementation with copy-and-adapt strategy.”
solo-developer
Why they built it
Legacy codebase refactor across repos was complex; one-shot AI prompts failed, needed guided strategy for agent to handle exploration, planning, and execution without hallucination or scope creep.
What worked
Todo extension prevented scope drift with granular task lists; automated commit policy via .goosehints enabled granular version control; copy-and-adapt strategy from known systems perfectly implemented backend logic.
What broke or was painful
Manual tracking version control tedious; agents prone to scope drift into adjacent functionality; long-running commands halt process.
The result
Successfully migrated a legacy LLM credit provisioning system from React/Vite frontend + Node/Express backend to unified Next.js app, achieving pixel-perfect UI recreation and correct backend logic implementation with copy-and-adapt strategy.