Extensions for the Athas editor.
Syntax highlighting is now bundled in Athas core by default. This repository focuses on language tooling extensions (LSP, formatter, linter, snippets), plus themes and icon themes.
Extension manifests are declarative. New manifests should prefer the
contributes shape for editor contributions, while managed runtime tooling stays under
capabilities. Existing top-level contribution fields are still supported.
Language extensions can live under extensions/{name}/. Marketplace contribution
extensions are grouped by type:
extensions/
lua/
extension.json # Extension manifest
tooling.json # Platform-specific tooling (LSP, formatter, linter binaries)
build.sh # Build script for tooling archives
theme/
market/
extension.json # Theme contribution manifest
icon.svg
icon-theme/
market/
extension.json # Icon theme contribution manifest
icon.svg
Root-level files:
registry.json/index.json- Extension registry for the marketplacemanifests.json- Combined manifests (auto-generated, do not edit manually)
{
"$schema": "https://athas.dev/schemas/extension.json",
"id": "athas.mylang",
"name": "MyLang",
"displayName": "MyLang",
"version": "1.0.0",
"publisher": "Athas",
"categories": ["Language"],
"engines": {
"athas": ">=0.7.0"
},
"contributes": {
"languages": [
{
"id": "mylang",
"extensions": [".ml"],
"filenames": ["MyLangfile"],
"filenamePatterns": ["*.mylang.json"],
"aliases": ["MyLang"]
}
]
},
"capabilities": {
"lsp": {
"name": "mylang-language-server",
"runtime": "node",
"package": "mylang-language-server",
"args": ["--stdio"]
}
}
}Supported contribution arrays include languages, snippets, themes, iconThemes,
databaseProviders, agents, commands, and keybindings. The validation and catalog
scripts read both top-level arrays and contributes.*.
bun run scripts/validate.ts bun run scripts/package-extensions.ts bun run scripts/generate-manifests.ts bun run scripts/build-extensions-index.ts
See CONTRIBUTING.md.