Language support

Astria registers 25 language configurations. Discovery and parser selection share the registry in crates/astria-core/src/languages.rs.

The table lists configured tree-sitter node kinds, not a promise of complete language semantics or successful resolution of every construct. None means no node kind is configured for that category. Classes include language-specific containers such as HCL blocks; parser reuse and shared AST walker rules may limit extraction. Imports and calls are syntax candidates, not guarantees of resolved dependency edges. Closure kinds indicate configured anonymous-function extraction.

Language	Discovered extensions	Class/container kinds	Function kinds	Import kinds	Call kind	Closure kinds
Python	.py	class_definition	function_definition	import_statement, import_from_statement	call	None
JavaScript	.js, .jsx, .mjs	class_declaration	function_declaration, generator_function_declaration, method_definition, function_expression, generator_function, arrow_function	import_statement, import_declaration	call_expression	None
TypeScript	.ts, .tsx	class_declaration	function_declaration, generator_function_declaration, method_definition, function_expression, generator_function, arrow_function	import_statement, import_declaration	call_expression	None
Rust	.rs	struct_item, enum_item, trait_item, impl_item	function_item, function_signature_item	use_declaration	call_expression	None
Go	.go	type_declaration	function_declaration, method_declaration	import_declaration	call_expression	None
Java	.java	class_declaration, interface_declaration, enum_declaration	method_declaration, constructor_declaration	import_declaration	method_invocation	None
C	.c, .h	struct_specifier, enum_specifier	function_definition	preproc_include	call_expression	None
C++	.cpp, .cc, .cxx, .hpp	class_specifier, struct_specifier, enum_specifier	function_definition	preproc_include	call_expression	None
Ruby	.rb, .rake	class, module, singleton_class	method, singleton_method	call	call	None
Swift	.swift	class_declaration, struct_declaration, enum_declaration, protocol_declaration	function_declaration	import_declaration	call_expression	None
Kotlin	.kt, .kts	class_declaration, object_declaration, interface_declaration, enum_declaration	function_declaration	import_header	call_expression	None
Scala	.scala	class_definition, object_definition, trait_definition, enum_definition	function_definition, function_declaration	import_declaration	call_expression	None
PHP	.php	class_declaration, interface_declaration, trait_declaration, enum_declaration	function_definition, method_declaration, declaration_list	namespace_use_declaration, namespace_definition	function_call_expression	anonymous_function, arrow_function
C#	.cs	class_declaration, struct_declaration, interface_declaration, enum_declaration	method_declaration, constructor_declaration, local_function_statement	using_directive	invocation_expression	None
Lua	.lua	None	function_declaration, function_definition	None	function_call	None
Haskell	.hs	class, data_type, newtype, type_alias	decl, signature	import	apply	None
Elixir	.ex, .exs	call	call	call	call	None
Shell	.sh, .bash	None	function_definition	None	command	None
Dart	.dart	class_definition, mixin_declaration, extension_declaration, enum_declaration	function_expression, method_declaration	import_specification	call_expression	None
Zig	.zig	struct_declaration, enum_declaration, union_declaration, opaque_declaration	function_declaration, test_declaration	using_namespace_declaration	call_expression	None
Terraform/HCL	.tf, .tfvars, .hcl	block	None	None	function_call	None
PowerShell	.ps1, .psm1, .psd1	class_statement	function_statement, filter_statement	using_statement	command	None
Verilog/SystemVerilog	.v, .sv, .svh, .vh	module_declaration, interface_declaration, program_declaration, class_declaration	function_body_declaration, task_body_declaration	import_declaration	subroutine_call	None
Metal	.metal	struct_specifier, class_specifier	function_definition	preproc_include	call_expression	None
CSS	.css, .scss	rule_set	None	import_statement	call_expression	None

Adding a language

1. Add the grammar dependency and a parser config module in crates/astria-extract/src/langs/.
2. Export the module from langs/mod.rs and add one registration in crates/astria-core/src/languages.rs. Reference that registration for the config's name and extensions.
3. Map only AST kinds handled by the shared extraction walker.
4. Run node scripts/generate-language-support.mjs to regenerate this table. The docs-sync guard rejects stale generated content.