The closed-loop cycle

Traditional handoffs are one-shot: a designer or AI tool generates a frontend, throws it over the wall, and hopes the backend team can figure out what endpoints to build. That breaks after the first iteration.

AppHandoff replaces one-shot handoffs with a closed-loop cycle that keeps frontend and backend continuously synchronized. Each loop iteration follows a predictable sequence: the scanner detects mismatches between frontend API calls and backend endpoints, tickets are generated with implementation details, agents or developers resolve tickets through pull requests, and the scanner re-runs to confirm the mismatch is gone.

The closed loop runs automatically on every push to either repository. Teams see their mismatch count decrease over time instead of discovering integration failures during QA or after deployment.

Each iteration of the loop is logged: which mismatches were detected, which tickets were created, which PRs resolved them, and when the re-scan confirmed resolution. This audit trail makes it easy to understand why a particular endpoint was built and what frontend behavior it satisfies.

A single codegen step is not enough. Teams need the loop that takes a mismatch from discovery to reviewed fix with enough context to repeat safely.

Without the loop, integration bugs accumulate silently. Each new frontend feature adds potential mismatches that nobody tracks. By the time QA finds them, the context for fixing them is gone. The closed loop keeps that context alive and actionable throughout the development cycle.