Handling Midnight SDK Breaking Changes: A Developer's Upgrade Playbook

You run npm update on a Friday afternoon. Tests were passing that morning. Now your terminal looks like this: CompactError: Version mismatch Expected circuit artifact version: 4.1.0 Found: 3.8.2 Contract: ./managed/counter/contract/index.cjs Nothing is actually wrong with your .compact source files. You just have stale compiled artifacts sitting in managed/ from before the upgrade, and the runtime now refuses to load them. Breaking changes on Midnight split into two categories: TypeScript API re