hoogle

Hoogle Plugin for Claude Code

Search Haskell APIs using Hoogle directly from Claude Code.

Commands

/hoogle:search - Local Search

Search your local Hoogle database:

/hoogle:search map
/hoogle:search (a -> Bool) -> [a] -> [a]
/hoogle:search +base foldl

Requires hoogle executable on PATH. Local database is generated automatically on first use.

/hoogle:remote - Online Search

Search the official Hoogle server at hoogle.haskell.org:

/hoogle:remote map
/hoogle:remote (a -> Bool) -> [a] -> [a]

Use a custom Hoogle server:

/hoogle:remote map --url https://custom-hoogle.example.com

Automatic Skill

The hoogle skill activates automatically when Claude is working with Haskell code and needs to look up functions, type signatures, or documentation.

Search Examples

Goal	Query
Find by name	map, filter, foldl
Find by type	a -> b -> a, (a -> Bool) -> [a] -> [a]
Filter by package	+base map, +containers lookup

Prerequisites

• hoogle executable on PATH (cabal install hoogle or stack install hoogle)
• jq for JSON parsing
• For remote search: curl

Installation

1. Add the marketplace:

   /plugin marketplace add m4dc4p/claude-hoogle
   

2. Install the plugin:

   /plugin install hoogle@claude-hoogle