crystal-lang

crystal-lang/crystal

The Crystal Programming Language

20.3K stars 1.7K forks 20.3K watchers Crystal Apache License 2.0
compiler crystal crystal-language hacktoberfest programming-language
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14 Open Issues Need Help Last updated: Jul 25, 2026

Open Issues Need Help

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`Generic#name` does not support `generic_args` named argument 11 days ago
kind:bug good first issue topic:lang:macros
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
`root` property of `JSON::Field` should support nested keys 2 months ago
kind:feature good first issue help wanted topic:stdlib:serialization
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
Request for generic alias 2 months ago
kind:feature topic:compiler topic:lang:type-system help wanted
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
Add `ignore` and `ignore_deserialize` properties to `URI::Params::Field` 2 months ago
kind:feature good first issue help wanted topic:stdlib:serialization
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
Supporting alternative test tooling 4 months ago
status:discussion help wanted topic:stdlib:specs
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
Add String#present? method. 5 months ago
kind:feature good first issue topic:stdlib:text
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
Add **convenience method to retrieve** current value of `content_length` and `content-type` (and probably others) 5 months ago
kind:feature status:accepted good first issue topic:stdlib:networking
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
Add constant with compiler flags 6 months ago
kind:feature good first issue help wanted topic:compiler:semantic
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
Add methods for filling a buffer from an IO greedily/lazily 7 months ago
kind:feature good first issue help wanted topic:stdlib:files
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
Unhelpful error when using named arguments on macro methods that do not support them 7 months ago
kind:feature good first issue topic:lang:macros
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
Cannot `:nodoc:` `def_clone` macro 8 months ago
kind:bug good first issue topic:tools:docs-generator
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
Drop `OAuth::Params` 9 months ago
good first issue kind:refactor topic:stdlib:networking
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
[RFC] In-place variants of Set's methods from Hash 9 months ago
kind:feature help wanted topic:stdlib:collection
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language
Document that strings are `\0` ending 10 months ago
kind:feature kind:docs good first issue topic:stdlib:text
crystal-lang/crystal
20.3K

The Crystal Programming Language

Crystal
#compiler#crystal#crystal-language#hacktoberfest#programming-language