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:

code

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:

code

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:

code

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:

code

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:

code

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:

code

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:

code

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:

code

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

For usage examples:

code

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

For understanding parameters:

code

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

For finding related functions:

code

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

For module overview:

code

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

Tips

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

Documentation Site Index

The main documentation index is at:

code

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

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

Best Practices

•Start with the right module - Identify which module contains the API before fetching
•Use targeted prompts - Ask for specific information (signature, examples, parameters)
•Check for overloads - Many Effect functions have multiple signatures
•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 explanations.