3 posts
Net-30 terms, PO numbers, per-account pricing, custom shipping logic — and the eight-week build it takes to ship them on top of Shopify's checkout extensibility stack. From an agency that has shipped twelve.
Six Rust Functions in production. The cargo manifest, the wasm-size optimisation that drops binaries 60%, the JSON schema mismatch trap nobody documents, and the cold-start latency data that justifies the extra build complexity.
Twenty Functions in production, and the bugs we hit on every one. The Discount Function input/output contract, the BOGO traps, the tiered-pricing decision points, and the test harness that catches the schema drift the Shopify CLI doesn't.