In a monorepo, each service should run the same CI jobs when its di…

Question

In a monorepo, each service should run the same CI jobs when its directory changes. Which design is most maintainable?

Accepted Answer

A thin caller workflow per service (or one workflow with path filters) that calls a shared reusable workflow for the actual CI jobs — Centralize job logic in reusable workflows; use path-filtered thin callers so each service triggers only when relevant files change.

Answer

Copy-paste a 400-line workflow into each service directory without reuse

Answer

One schedule-only workflow that rebuilds all services every minute

Answer

Disable Actions and run CI only on developer laptops

In a monorepo, each service should run the same CI jobs when its directory changes. Which design is most maintainable?

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Full Explanation