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lgwanai
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effect

Creates .opencode/references/effect-smol compliant Tyepescript services and workflows with ASP.NET Core MVC controllers and EF Core repositories.

4|1|Updated Mar 22, 2026
Search Tags:#typescript#schema#effect#typed errors#testeffect#typed services#http layer
One-click install
npx skills add https://github.com/lgwanai/openforce --skill effect-lgwanai
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: effect
Source: https://github.com/lgwanai/openforce/tree/main/skills/effect
Command: npx skills add https://github.com/lgwanai/openforce --skill effect-lgwanai

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

It helps you implement and evolve TypeScript services, schemas, and workflows using Effect v4 safely and consistently, avoiding outdated Effect v2/v3 patterns and reducing type and integration errors.

Core Features & Use Cases

  • Effect v4 / effect-smol alignment: Use the current v4 API surface as the single source of truth and match naming/style to the referenced repo.
  • Typed domain modeling: Prefer Schema (including branded schemas) and Schema.TaggedErrorClass for typed, explicit domain errors.
  • Workflow and service structure: Use Effect.gen(function* () { ... }) for multi-step workflows and keep HTTP handlers thin by moving business rules into services.
  • Tests that match runtime behavior: Use the repo’s Effect test helpers (testEffect, it.live) and keep dependency provisioning explicit and visible.

Quick Start

Use the effect skill to implement a new typed service workflow in this repo by first verifying the exact Effect v4 APIs in .opencode/references/effect-smol and then applying the project’s local composition and testing conventions.

Frequently Asked Questions about effect

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I implement typed errors in Effect v4?▼

Define domain errors in Effect v4 using `Schema.TaggedErrorClass` and `Schema` for branded data shapes to ensure explicit, type-safe error handling across your TypeScript services and workflows.

What is the best way to structure multi-step workflows with Effect v4?▼

Structure multi-step workflows in Effect v4 using `Effect.gen(function* () { ... })` to compose sequential effectful operations while keeping HTTP handlers thin and moving business rules into dedicated services.

How do I test Effect workflows with deterministic and live behaviors?▼

Test Effect workflows by using the repo's test helpers like `testEffect` and `it.live`, keeping dependency provisioning explicit and visible to accurately match runtime behavior during testing.

Why does my Effect schema integration fail with outdated API patterns?▼

Effect schema integration fails when applying outdated v2 or v3 patterns, so you must verify the exact current v4 API surface in `.opencode/references/effect-smol` to avoid type and integration errors.

Does this Effect v4 approach work with HTTP handler integration?▼

Yes, Effect v4 supports HTTP handler integration by keeping handlers thin and delegating business rules to typed services, allowing the HTTP layer to safely compose effectful workflows.

Do I need to verify APIs in effect-smol before adding domain schemas?▼

You must verify APIs in `.opencode/references/effect-smol` before adding domain schemas to ensure your typed TypeScript services align with the current v4 API surface and repo patterns.

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