Format Haskell source files: *.hs, *.lhs, and *.hsig, with the project's configured formatter: fourmolu, ormolu, or stylish-haskell. Use before compiling, after source edits, and when applying project style.
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See how to installReview the instructions the agent will receive before you install.
Format Haskell source files with the project's formatter. .cabal and cabal.project* files are handled by the haskell-cabal-gild skill. Always format before compiling.
Walk up from the file's directory and choose by project config:
fourmolu.yaml or .fourmolu.yaml selects fourmolu..stylish-haskell.yaml selects stylish-haskell.fourmolu, ormolu, stylish-haskell.This project has fourmolu.yaml, so prefer fourmolu when available.
All supported formatters accept -i:
fourmolu -i <file>
ormolu -i <file>
stylish-haskell -i <file>
This repository has shared PostToolUse hooks under .agents/hooks/, wired from
Claude/Codex configuration. The Haskell formatting hook formats changed .hs, .lhs, and
.hsig files. Re-read files if the hook reports that it changed them.
Format .cabal and cabal.project* files with the haskell-cabal-gild skill.
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Read Haskell package documentation, Haddock HTML, Hackage pages, or dependency source for cabal nix-style projects. Prefer locally built/cached docs and source from the cabal store, dist-newstyle, plan.json, and repo-cache; fall back to Hackage only for packages outside the project dependency set or when local docs are unavailable.
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Super-skill for developing Haskell projects with cabal nix-style builds. Orchestrates HLS diagnostics, Haddock, Hoogle, source formatting, and cabal-gild into one workflow. Use when writing, editing, refactoring, building, typechecking, fixing compiler errors, renaming symbols, looking up APIs, or changing dependencies in Haskell projects. Treat cabal.project as the source of truth, prefer HLS before full builds, and prefer local docs over remote lookup.
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Format Haskell package descriptions and cabal project files with cabal-gild: *.cabal, cabal.project, cabal.project.local, and cabal.project.freeze. Use after editing dependencies or stanzas, when refreshing cabal-gild discover module lists, or when checking cabal file formatting.
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Search Haskell APIs using Hoogle. Use when working with Haskell projects to look up function signatures, find functions by type, discover library documentation, or identify which module exports an item.
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