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Beginner Friendly Open-Source Haskell

Good First Issues in Haskell

Explore curated starter issues in high-scoring Haskell repositories. Every listed issue belongs to a welcoming repository scored by C-Rank™ on PR merge rates, review responsiveness, and first-timer acceptance.

Updated: Mon, 31 Aug 2026 UTC (Live GitHub Sync)
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Top Haskell Repositories with Beginner Issues (20)

Updated Daily via GitHub GraphQL
flora-pm
flora-server
flora-pm/flora-server
SElite
156·HAHaskell

A package index for the Haskell ecosystem

#hackage#haskell#package-management
91%
Merge Rate
4d
Review Time
100%
1st-Timers
3 GFI
Scorecard
GaloisInc
saw-script
GaloisInc/saw-script
AWelcoming
517·HAHaskell

The Software Analysis Workbench

89%
Merge Rate
2d
Review Time
93%
1st-Timers
7 GFI
Scorecard
digital-asset
daml
digital-asset/daml
AWelcoming
913·HAHaskell

The Daml smart contract language

#bazel#daml#distributed-ledger
87%
Merge Rate
23h
Review Time
81%
1st-Timers
2 GFI
Scorecard
Plutonomicon
plutarch-plutus
Plutonomicon/plutarch-plutus
AWelcoming
133·HAHaskell

Typed eDSL for writing UPLC /ˈpluː.tɑːk/

95%
Merge Rate
2d
Review Time
67%
1st-Timers
1 GFI
Scorecard
hadolint
hadolint
hadolint/hadolint
AWelcoming
12.4k·HAHaskell

Dockerfile linter, validate inline bash, written in Haskell

#docker#dockerfile#dockerfile-linter
93%
Merge Rate
2h
Review Time
100%
1st-Timers
1 GFI
Scorecard
pschachte
wybe
pschachte/wybe
AWelcoming
55·HAHaskell

A programming language supporting most features of both declarative and imperative languages

86%
Merge Rate
2h
Review Time
100%
1st-Timers
4 GFI
Scorecard
neohaskell
NeoHaskell
neohaskell/NeoHaskell
AWelcoming
347·HAHaskell

⏩ NeoHaskell is a dialect of Haskell that is focused on newcomer-friendliness and productivity.

#ai#beginner-friendly#command-line
85%
Merge Rate
16h
Review Time
100%
1st-Timers
2 GFI
Scorecard
DataHaskell
dataframe
DataHaskell/dataframe
AWelcoming
264·HAHaskell

A fast, safe, and intuitive DataFrame library.

#dataframe#exploratory-data-analysis#functional-programming
65%
Merge Rate
5h
Review Time
75%
1st-Timers
4 GFI
Scorecard
well-typed
haskell-debugger
well-typed/haskell-debugger
AWelcoming
146·HAHaskell

A modern step-through debugger for GHC Haskell

86%
Merge Rate
12d
Review Time
80%
1st-Timers
6 GFI
Scorecard
haskell-beam
beam
haskell-beam/beam
AWelcoming
634·HAHaskell

A type-safe Haskell SQL library

#duckdb#haskell#orm
87%
Merge Rate
2d
Review Time
80%
1st-Timers
3 GFI
Scorecard
cardano-scaling
hydra
cardano-scaling/hydra
AWelcoming
336·HAHaskell

Implementation of the Hydra Head protocol

#blockchain#cardano#haskell
74%
Merge Rate
3d
Review Time
67%
1st-Timers
15 GFI
Scorecard
IntersectMBO
plutus
IntersectMBO/plutus
AWelcoming
1.6k·HAHaskell

The Plutus language implementation and tools

#blockchain#programming-language#smart-contracts
78%
Merge Rate
22h
Review Time
100%
1st-Timers
1 GFI
Scorecard
xmonad
xmonad-contrib
xmonad/xmonad-contrib
AWelcoming
604·HAHaskell

Contributed modules for xmonad

#hacktoberfest#haskell#window-manager
85%
Merge Rate
1d
Review Time
100%
1st-Timers
1 GFI
Scorecard
IntersectMBO
cardano-base
IntersectMBO/cardano-base
AWelcoming
105·HAHaskell

Code used throughout the Cardano eco-system

79%
Merge Rate
1d
Review Time
78%
1st-Timers
1 GFI
Scorecard
discord-haskell
discord-haskell
discord-haskell/discord-haskell
BSolid
297·HAHaskell

Haskell library for writing Discord bots

#bot#discord#discord-api
78%
Merge Rate
19h
Review Time
50%
1st-Timers
4 GFI
Scorecard
clash-lang
clash-compiler
clash-lang/clash-compiler
AWelcoming
1.6k·HAHaskell

Haskell to VHDL/Verilog/SystemVerilog compiler

#asic#fpga#hardware-description-language
76%
Merge Rate
4d
Review Time
67%
1st-Timers
1 GFI
Scorecard
jonascarpay
apecs
jonascarpay/apecs
BSolid
421·HAHaskell

a fast, extensible, type driven Haskell ECS framework for games

#entity-component-system#game-development#haskell
81%
Merge Rate
4h
Review Time
50%
1st-Timers
2 GFI
Scorecard
jaspervdj
hakyll
jaspervdj/hakyll
BSolid
2.9k·HAHaskell

A static website compiler library in Haskell

67%
Merge Rate
11h
Review Time
50%
1st-Timers
1 GFI
Scorecard
turion
rhine
turion/rhine
BSolid
144·HAHaskell

Haskell Functional Reactive Programming framework with type-level clocks

#clock#frp#hacktoberfest
65%
Merge Rate
13h
Review Time
50%
1st-Timers
2 GFI
Scorecard
circuithub
rel8
circuithub/rel8
BSolid
169·HAHaskell

Hey! Hey! Can u rel8?

#dsl#haskell#postgresql
78%
Merge Rate
3d
Review Time
0%
1st-Timers
2 GFI
Scorecard

How to make your first Haskell open-source pull request

Finding approachable Good First Issues in Haskell allows you to build real-world software engineering experience. Instead of submitting PRs to abandoned repositories, GetMerged verifies maintainer review speeds and first-timer acceptance rates before you write a single line of code.

Select any issue above to claim it directly on GitHub, or click a repository to inspect full maintainer review turnaround metrics and triage guidance!

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