effect-foundations

Idiomatic Effect TypeScript uses a data-first pipe style with explicit error and context channels. Start with a typed template, apply Effect.gen for sequential logic, use Effect.all for parallelism, and maintain explicit layers when R is not never.

Use typed errors with Data.TaggedError for explicit error definitions. Combine with catch patterns and a clean lift/recovery approach using Effect.succeed and Effect.fail to maintain type safety across your pipeline.

Use Effect.gen for sequential logic where one operation depends on the result of another. Use Effect.all when you need to run multiple operations in parallel and combine their results.

Provide explicit layers when R is not never—that is, when your Effect requires a context or environment to execute. Layers structure dependencies and services needed by your Effect pipelines.

Use map for transformations, flatMap or andThen for chaining dependent effects, and tap for side effects. Select based on whether you need to chain another Effect (flatMap/andThen) or just transform the value (map).

No. This covers core Effect foundations suitable for tasks starting an Effect project or selecting operators. It provides a minimal typed template and guidance on structuring sequential and parallel pipelines from scratch.