Language support

Languages (61)

rgctl ships with 24 Tier-1 custom plugins (handler = "custom", verified by *-ast-coverage.json manifests) and 37 Tier-2 declarative query plugins (handler = "queries", powered by QueryLanguagePlugin and queries/tags.scm).

Architecture & contributor docs: Tier 1 language support · Tier 2 language support. Plugin crates live under crates/rgctl-lang-*.

Tier 1 — Custom AST Plugins (24)

Tier 1 requirements & Layer F checklist →

Dedicated LanguagePlugin implementations with grammar-verified *-ast-coverage.json manifests, call graphs, inheritance/MRO, CFG/PDG, taint rules, and hybrid CPG support.

Language	Extensions	Grammar	Kinds	Handled	Skip
Bash	.sh, .bash	tree-sitter-bash@0.25.1	59	7	52
C	.c, .h	tree-sitter-c@0.24.2	125	37	88
C#	.cs	tree-sitter-c-sharp@0.23.5	215	55	160
C++	.cpp, .cc, .cxx, .hpp, .hh, .hxx	tree-sitter-cpp@0.23.4	206	58	148
Dart	.dart	tree-sitter-dart@0.2.0	221	19	202
Elixir	.ex, .exs	tree-sitter-elixir@0.3.5	45	6	39
ERB	.erb	tree-sitter-embedded-template@0.25.0	8	4	4
Go	.go	tree-sitter-go@0.25.0	107	42	65
Groovy	.groovy, .gradle	tree-sitter-groovy@0.1.2	150	70	80
HCL	.hcl, .tf, .tfvars	tree-sitter-hcl@1.1.0	64	3	61
Java	.java	tree-sitter-java@0.23.5	142	56	86
JavaScript	.js, .jsx, .mjs	tree-sitter-javascript@0.25.0	114	54	60
Kotlin	.kt, .kts	tree-sitter-kotlin-ng@1.1.0	114	43	71
Lua	.lua	tree-sitter-lua@0.5.0	47	10	37
Markdown	—	tree-sitter-md@0.5.3	51	6	45
PHP	.php	tree-sitter-php@0.24.2	157	55	102
Puppet	.pp	tree-sitter-puppet@1.3.0	58	44	14
Python	.py, .pyw	tree-sitter-python@0.25.0	123	55	68
Ruby	.rb	tree-sitter-ruby@0.23.1	134	87	47
Rust	.rs	tree-sitter-rust@0.24.2	163	56	107
Scala	.scala, .sc	tree-sitter-scala@0.26.3	171	19	152
SQL	.sql	tree-sitter-sql@0.0.2	523	7	516
Swift	.swift	tree-sitter-swift@0.7.4	188	19	169
TypeScript	.ts, .tsx	tree-sitter-typescript@0.23.2	177	70	107

Tier 1 handler legend

SymbolEmits graph symbols / nodes (functions, types, …).
RelationEmits typed edges (calls, imports, heritage, …).
CfgStatementFeeds CFG / control-flow construction.
AstSkeletonKept for analysis skeleton / field-write paths.
LiteralLeaf / literal tokens walked but not promoted to symbols.
SkipNamed grammar kind intentionally not mapped.

Tier 2 — Declarative Query Plugins (37)

How Tier 2 tags.scm queries work →

Driven by QueryLanguagePlugin (rgctl-lang-runtime) and precompiled queries/tags.scm files validated against the Tier-2 capture vocabulary (@definition.*, @reference.call, @reference.class, @reference.implementation, @import.path).

Language	Extensions	Grammar Crate	Captures	Function / Class Kinds
Clojure	.clj, .cljs, .cljc	tree-sitter-clojure	6 captures	list_lit
CMake	.cmake	tree-sitter-cmake	4 captures	function_def
CSS	.css	tree-sitter-css	4 captures	keyframes_statement, rule_set
CUDA	.cu, .cuh	tree-sitter-cuda	5 captures	function_definition, struct_specifier, class_specifier
D	.d	tree-sitter-d	7 captures	function_declaration, class_declaration, struct_declaration
Elm	.elm	tree-sitter-elm	7 captures	value_declaration, type_declaration
Emacs Lisp	.el	tree-sitter-elisp	6 captures	function_definition
Erlang	.erl, .hrl	tree-sitter-erlang	6 captures	fun_decl, function_clause, record_decl
F#	.fs, .fsi, .fsx	tree-sitter-fsharp	6 captures	function_or_value_defn, type_definition
Fortran	.f90, .f95, .f03, .f08, .F90	tree-sitter-fortran	6 captures	function, subroutine, derived_type_definition
GDScript	.gd	tree-sitter-gdscript	4 captures	function_definition, class_definition
Gleam	.gleam	tree-sitter-gleam	6 captures	function, type_definition
GLSL	.glsl, .vert, .frag, .comp	tree-sitter-glsl	4 captures	function_definition, struct_specifier
GraphQL	.graphql, .gql	tree-sitter-graphql	5 captures	operation_definition, fragment_definition, object_type_definition
Haskell	.hs	tree-sitter-haskell	8 captures	function, class, data_type, newtype
HTML	.html, .htm	tree-sitter-html	3 captures	script_element, element
JSON	.json	tree-sitter-json	2 captures	object
Julia	.jl	tree-sitter-julia	7 captures	function_definition, struct_definition
Makefile	.mk, .mak	tree-sitter-make	4 captures	rule
Nix	.nix	tree-sitter-nix	3 captures	function_expression
Objective-C	.m, .mm	tree-sitter-objc	5 captures	function_definition, method_definition, class_interface, class_implementation
OCaml	.ml, .mli	tree-sitter-ocaml	6 captures	value_definition, class_definition
Odin	.odin	tree-sitter-odin	7 captures	procedure_declaration, struct_declaration
PowerShell	.ps1, .psm1	tree-sitter-powershell	4 captures	function_statement, class_statement
Prisma	.prisma	tree-sitter-prisma	4 captures	model_declaration, enum_declaration
Protocol Buffers	.proto	tree-sitter-proto	4 captures	rpc, message
R	.r, .R	tree-sitter-r	3 captures	function_definition
Racket	.rkt	tree-sitter-racket	6 captures	list
Scheme	.scm, .ss	tree-sitter-scheme	5 captures	list
Solidity	.sol	tree-sitter-solidity	4 captures	function_definition, contract_declaration
Starlark	.star, .bzl	tree-sitter-starlark	5 captures	function_definition
Svelte	.svelte	tree-sitter-svelte-ng	3 captures	script_element, element
TOML	.toml	tree-sitter-toml-ng	3 captures	table
Verilog / SystemVerilog	.v, .sv, .svh	tree-sitter-verilog	6 captures	function_declaration, task_declaration, class_declaration, module_declaration
VHDL	.vhd, .vhdl	tree-sitter-vhdl	6 captures	subprogram_definition, component_declaration
YAML	.yaml, .yml	tree-sitter-yaml	2 captures	—
Zig	.zig, .zon	tree-sitter-zig	8 captures	function_declaration, struct_declaration