Language support

Astria registers 42 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.

AST source lines are one-based. Embedded JavaScript/TypeScript lines in Vue, Svelte, and Astro are translated back to their original component file. Call resolution retains lexical scopes, supported import paths, and language evidence. Unknown instance receivers remain unresolved: a call such as row.get() cannot bind to an unrelated class method named get. Explicit self/this calls use the enclosing class; statically qualified paths and exact assigned JavaScript member declarations can resolve when their evidence selects one declaration. These AST bindings remain name inference, not compiler-proven call targets; use a standard SCIP index for compiler-provided symbol relationships.

Extensionless scripts are discovered from a bounded, complete shebang line, including supported versioned interpreters such as python3.12 and node22. Discovery and parser/cache selection use the same language registration. Explicit project language overrides remain available through .astria.toml.

Additional declaration handling includes Kotlin type aliases, C# delegates, Dart typedefs, and Swift macros. These special walker paths are not all represented by the container/function columns below. Type references and Swift macro calls resolve only when supported evidence selects a unique declaration.

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, interface_declaration	function_declaration, generator_function_declaration, method_definition, method_signature, 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
Astro	.astro	None	None	None	None	None
Common Lisp	.lisp, .cl, .lsp, .asd	None	defun_header	None	list_lit	None
DreamMaker	.dm	type_definition	proc_definition, proc_override	preproc_include	call_expression	None
Fortran	.f90, .f95, .f03, .f08, .f, .for	derived_type_definition	function_statement, subroutine_statement	import_statement	call_expression	None
Groovy	.groovy, .gradle	class_declaration, interface_declaration, enum_declaration	method_declaration, function_definition, constructor_declaration	import_declaration	method_invocation	closure
Julia	.jl	module_definition, struct_definition	function_definition, macro_definition	import_statement, using_statement	call_expression	arrow_function_expression
Luau	.luau	None	function_declaration, function_definition	None	function_call	None
Objective-C	.m, .mm	class_implementation, class_interface	method_definition, function_definition	preproc_include, module_import	call_expression	None
OCaml	.ml	module_definition, class_definition, exception_definition	let_binding	open_module, include_module	application_expression	None
OCaml Interface	.mli	module_definition	value_specification	open_module	application_expression	None
R	.r	None	function_definition	None	call	None
Solidity	.sol	contract_declaration, interface_declaration, library_declaration, struct_declaration, enum_declaration	function_definition, modifier_definition, constructor_definition	import_directive, using_directive	call_expression	None
SQL	.sql	create_table, create_view, create_materialized_view, create_schema, create_database	create_function, create_trigger, create_query	None	invocation	None
VB.NET	.vb	None	None	None	None	None
Pascal/Delphi	.pas, .dpr, .dpk, .inc	None	None	None	None	None
Vue	.vue	None	None	None	None	None
Svelte	.svelte	None	None	None	None	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.