api-doc-lookup

What this skill does

# Effect-TS API Documentation Lookup

## Overview

Use WebFetch to retrieve API documentation directly from the official Effect-TS documentation site at `https://effect-ts.github.io/effect/`.

## URL Patterns

### Core Effect Modules

For modules in the main `effect` package:

```
https://effect-ts.github.io/effect/effect/{Module}.ts.html
```

**Common modules:**
| Module | URL |
|--------|-----|
| Effect | `https://effect-ts.github.io/effect/effect/Effect.ts.html` |
| Schema | `https://effect-ts.github.io/effect/effect/Schema.ts.html` |
| Stream | `https://effect-ts.github.io/effect/effect/Stream.ts.html` |
| Layer | `https://effect-ts.github.io/effect/effect/Layer.ts.html` |
| Context | `https://effect-ts.github.io/effect/effect/Context.ts.html` |
| Schedule | `https://effect-ts.github.io/effect/effect/Schedule.ts.html` |
| Fiber | `https://effect-ts.github.io/effect/effect/Fiber.ts.html` |
| Queue | `https://effect-ts.github.io/effect/effect/Queue.ts.html` |
| Ref | `https://effect-ts.github.io/effect/effect/Ref.ts.html` |
| Scope | `https://effect-ts.github.io/effect/effect/Scope.ts.html` |
| Option | `https://effect-ts.github.io/effect/effect/Option.ts.html` |
| Either | `https://effect-ts.github.io/effect/effect/Either.ts.html` |
| Chunk | `https://effect-ts.github.io/effect/effect/Chunk.ts.html` |
| HashMap | `https://effect-ts.github.io/effect/effect/HashMap.ts.html` |
| HashSet | `https://effect-ts.github.io/effect/effect/HashSet.ts.html` |
| Duration | `https://effect-ts.github.io/effect/effect/Duration.ts.html` |
| Config | `https://effect-ts.github.io/effect/effect/Config.ts.html` |
| ConfigProvider | `https://effect-ts.github.io/effect/effect/ConfigProvider.ts.html` |
| Match | `https://effect-ts.github.io/effect/effect/Match.ts.html` |
| Data | `https://effect-ts.github.io/effect/effect/Data.ts.html` |
| Cause | `https://effect-ts.github.io/effect/effect/Cause.ts.html` |
| Exit | `https://effect-ts.github.io/effect/effect/Exit.ts.html` |
| Random | `https://effect-ts.github.io/effect/effect/Random.ts.html` |
| Clock | `https://effect-ts.github.io/effect/effect/Clock.ts.html` |
| Tracer | `https://effect-ts.github.io/effect/effect/Tracer.ts.html` |
| Metric | `https://effect-ts.github.io/effect/effect/Metric.ts.html` |
| Logger | `https://effect-ts.github.io/effect/effect/Logger.ts.html` |
| Sink | `https://effect-ts.github.io/effect/effect/Sink.ts.html` |
| PubSub | `https://effect-ts.github.io/effect/effect/PubSub.ts.html` |
| Deferred | `https://effect-ts.github.io/effect/effect/Deferred.ts.html` |
| Semaphore | `https://effect-ts.github.io/effect/effect/Semaphore.ts.html` |
| Request | `https://effect-ts.github.io/effect/effect/Request.ts.html` |
| RequestResolver | `https://effect-ts.github.io/effect/effect/RequestResolver.ts.html` |
| Cache | `https://effect-ts.github.io/effect/effect/Cache.ts.html` |
| TestClock | `https://effect-ts.github.io/effect/effect/TestClock.ts.html` |
| Runtime | `https://effect-ts.github.io/effect/effect/Runtime.ts.html` |
| ManagedRuntime | `https://effect-ts.github.io/effect/effect/ManagedRuntime.ts.html` |

### Scoped Packages

For `@effect/*` packages:

```
https://effect-ts.github.io/effect/{package-name}/{Module}.ts.html
```

**Examples:**
| Package | Module | URL |
|---------|--------|-----|
| @effect/platform | HttpClient | `https://effect-ts.github.io/effect/platform/HttpClient.ts.html` |
| @effect/platform | FileSystem | `https://effect-ts.github.io/effect/platform/FileSystem.ts.html` |
| @effect/platform | KeyValueStore | `https://effect-ts.github.io/effect/platform/KeyValueStore.ts.html` |
| @effect/cli | Command | `https://effect-ts.github.io/effect/cli/Command.ts.html` |
| @effect/sql | SqlClient | `https://effect-ts.github.io/effect/sql/SqlClient.ts.html` |

## How to Look Up Documentation

### Step 1: Identify the Module

Determine which module contains the API:

- `Effect.map` → Effect module
- `Schema.Struct` → Schema module
- `Stream.fromIterable` → Stream module
- `Layer.provide` → Layer module

### Step 2: Construct the URL

Use the URL pattern for the identified module:

```typescript
// For Effect.retry
const url = "https://effect-ts.github.io/effect/effect/Effect.ts.html";

// For Schema.transform
const url = "https://effect-ts.github.io/effect/effect/Schema.ts.html";
```

### Step 3: Fetch with Targeted Prompt

Use WebFetch with a specific prompt to extract the relevant information:

```
WebFetch(
  url: "https://effect-ts.github.io/effect/effect/Effect.ts.html",
  prompt: "Find the documentation for Effect.retry. Include the function signature, description, parameters, and any usage examples."
)
```

## Example Queries

### Looking up a specific function

**User asks:** "What are the parameters for Effect.retry?"

**Action:**

```
WebFetch(
  url: "https://effect-ts.github.io/effect/effect/Effect.ts.html",
  prompt: "Find documentation for the retry function. Include its complete type signature, all parameters and options, and usage examples."
)
```

### Looking up a type/interface

**User asks:** "What fields does Schedule have?"

**Action:**

```
WebFetch(
  url: "https://effect-ts.github.io/effect/effect/Schedule.ts.html",
  prompt: "Describe the Schedule type and its main combinators. List common schedule functions like exponential, spaced, recurs, etc."
)
```

### Looking up a module overview

**User asks:** "What functions are available in the Stream module?"

**Action:**

```
WebFetch(
  url: "https://effect-ts.github.io/effect/effect/Stream.ts.html",
  prompt: "List the main categories of functions in this module with brief descriptions of each category."
)
```

### Looking up related functions

**User asks:** "What are all the catch\* functions in Effect?"

**Action:**

```
WebFetch(
  url: "https://effect-ts.github.io/effect/effect/Effect.ts.html",
  prompt: "Find all error handling functions that start with 'catch'. Include catchAll, catchTag, catchTags, catchSome, etc. with their signatures and purposes."
)
```

## Prompt Patterns

Use these prompt patterns for effective documentation extraction:

### For function signatures:

```
"Find the complete type signature for {functionName}. Include all overloads if they exist."
```

### For usage examples:

```
"Find documentation and code examples for {functionName}. Focus on practical usage patterns."
```

### For understanding parameters:

```
"Explain the parameters and options for {functionName}. What does each parameter do?"
```

### For finding related functions:

```
"List all functions related to {topic} in this module. Include brief descriptions."
```

### For module overview:

```
"Provide an overview of this module. What are the main categories of functions and types?"
```

## Tips

1. **Be specific in prompts** - Ask for exactly what you need (signature, examples, parameters)
2. **Use the right module** - Effect functions are in Effect.ts, Schema functions in Schema.ts, etc.
3. **Check related functions** - The docs include "See also" links to related functions
4. **Look for examples** - Most functions include practical code examples with expected output
5. **Note version info** - Functions show "Since v2.0.0" or similar version information

## Documentation Site Index

The main documentation index is at:

```
https://effect-ts.github.io/effect/
```

Use this to discover available packages and modules if unsure which module contains a specific API.

## Best Practices

1. **Start with the right module** - Identify which module contains the API before fetching
2. **Use targeted prompts** - Ask for specific information (signature, examples, parameters)
3. **Check for overloads** - Many Effect functions have multiple signatures
4. **Look for "Since" annotations** - Verify the API is available in your Effect version

## Additional Resources

For comprehensive Effect documentation beyond API signatures, consult `${CLAUDE_PLUGIN_ROOT}/references/llms-full.txt` which contains tutorials, guides, and in-depth explanat