chore: address review feedback — deny-warn, proposal, version, spec data

Fix deprecated substring calls in spec_wbtest.mbt; –deny-warn now passes
Update proposal.md: 651 tests, 241 passed (37%), new features
Bump version to 0.2.0 in moon.mod and mooncake.yaml
Commit pkg.generated.mbti files; remove from .gitignore
Replace → with actual tab chars in spec test generator
Bump spec baseline from 238 to 241

MoonMarkdown

A CommonMark spec-compliant Markdown to HTML parser written in pure MoonBit.

Why MoonMarkdown?

MoonBit ecosystem has @mizchi/markdown (fast but 38% spec-compatible) and Cmark.mbt (C FFI wrapper). MoonMarkdown is the first pure MoonBit implementation targeting full CommonMark compliance.

Features

Block elements: ATX/Setext headings, paragraphs, fenced/indented code blocks, thematic breaks, blockquotes, ordered/unordered lists, HTML blocks, link reference definitions
Inline elements: backslash escapes, code spans, emphasis (italic/bold/bold-italic), links, images, autolinks, HTML entities, hard/soft line breaks
GFM extensions: tables (with alignment), task lists, strikethrough, bare URL autolinks
HTML rendering: with entity escaping and customizable CSS classes
CLI tool: convert Markdown files to HTML from command line
Zero dependencies: pure MoonBit, compiles to Native/Wasm/JS

Installation

moon add oilleelssq-wq/moonmarkdown

Usage

Library API

// One-liner: parse + render (default options)
let html = @moonmarkdown.md_to_html("# Hello\n\n**bold** text")

// Two-step: parse then render
let ast = @moonmarkdown.parse(input)
let html = @moonmarkdown.render(ast)

// With custom options
let options = @types.MarkdownOptions::gfm()
  .with_highlight(true)
  .with_css(@types.CssPreset::Default)

let ast = @moonmarkdown.parse_with_options(input, options)
let html = @moonmarkdown.render_with_options(ast, options)
// Or one step:
let html = @moonmarkdown.md_to_html_with_options(input, options)

CLI

# Convert file to stdout
moon run cmd/main -- input.md

# Convert file and save to output
moon run cmd/main -- input.md -o output.html

# Enable GFM extensions (tables, strikethrough)
moon run cmd/main -- input.md --gfm

# Enable syntax highlighting in fenced code blocks
moon run cmd/main -- input.md --highlight

# Disable raw HTML passthrough
moon run cmd/main -- input.md --no-html

# Add CSS classes using a preset (none|default|bootstrap)
moon run cmd/main -- input.md --css default

Examples

Markdown	HTML Output
`italic`	`<em>italic</em>`
`bold`	`<strong>bold</strong>`
`code`	`<code>code</code>`
`[link](url)`	`<a href="url">link</a>`
`\| a \| b \|`	`<table>...</table>`

Project Structure

moonmarkdown/
├── types/       # AST type definitions (Block, Inline)
├── util/        # Line scanner, character classification, HTML escape
├── block/       # Block-level parser
├── inline/      # Inline parser (emphasis, links, code spans)
├── render/      # HTML renderer
├── ext/         # GFM extensions (tables, task lists, strikethrough)
├── cmd/main/    # CLI entry point
├── tests/       # Test suite
└── docs/        # Competition materials

License

MIT