HTX Guide · 1.5.0-alpha.2
What's available today
HTX 1.5.0-alpha.1 capability matrix — CLI, WASM, and editor tooling.
Product line: 1.5.0-alpha.2 · Reference implementation: Rust 0.3.0-alpha.3
This page summarizes what you can use today in the open-source toolchain. Normative behavior is defined in the specification.
Language and compiler
| Capability | CLI / library | Browser playground |
|---|---|---|
| Block and inline directives | Yes | Yes |
| YAML frontmatter | Yes | Yes |
| Components and named slots | Yes | Yes (html profile) |
Semantic references (@id) |
Yes | Yes |
Security profiles (trusted, content-only, untrusted-data) |
Yes | Pre-built examples only |
GFM tables (--gfm) |
Yes | Pre-built examples only |
Compiler profiles html, html-sanitize, web-components |
Yes | html only |
Canonical formatter (htx format) |
Yes | — |
| Diagnostics HTX001–HTX014 | Yes | Yes |
| Streaming parse mode | Yes | — |
Tooling
| Tool | Status |
|---|---|
htx CLI (compile, parse, format, test) |
Build from GitHub |
@htx/core WASM bindings |
Yes — html compile profile (this site) |
VS Code extension (vscode-htx) |
Build from source |
htx-lsp (diagnostics, hover, go-to-definition, symbols) |
Yes |
Tree-sitter grammar (tree-sitter-htx) |
Yes |
| Documentation, examples, and playground | Yes — you are here |
Not yet (see roadmap)
cargo install/ npm publish to public registries- VS Code Marketplace publish with bundled LSP binary
- React / Astro compile profiles
- Footnotes, includes, layout shorthand in core grammar
- MCP server tools
Try it
No install required:
- Playground — edit HTX and inspect AST + HTML
- Examples — seven curated documents
With the CLI:
htx compile my-document.htx -o output.html
htx compile table.htx --gfm -o table.html
htx test ./my-fixtures/Build the CLI from the repository.