turborepo

To configure monorepo build system task pipelines, define task dependencies and outputs in `turbo.json` to orchestrate build, test, and lint scripts across packages. You map inputs to cache outputs, ensuring tasks execute in the correct sequence based on your package dependencies.

Turborepo cache misses in CI typically occur when environment variables or file inputs are untracked in `turbo.json`. You must explicitly declare environment variables and dependencies in the task configuration to ensure consistent cache keys and avoid redundant rebuilds.

To enforce architectural boundaries in a monorepo, structure dependencies by defining explicit package relationships and utilizing package filtering. This confines internal package imports, preventing unauthorized cross-dependencies and maintaining a clean structural hierarchy.

Yes, you can execute tasks exclusively on changed packages using package filtering syntax. By filtering dependencies and dependents, the build system skips unaffected packages, leveraging caching to optimize CI speed and avoid redundant computations.

Turborepo relies on existing `package.json` scripts to execute task orchestration. You define the pipeline relationships in `turbo.json`, but the actual task commands must exist in each workspace package's `package.json` to run successfully.

To handle environment variables in Turborepo and maintain consistent caching, declare them explicitly in the `env` field of `turbo.json`. This ensures the build system tracks variable changes, correctly invalidating caches when specific environment configurations are updated.