Register syntax-highlighting languages used in docs code blocks

[ntotten]

Problem

Rendering docs pages logged a stream of warnings and fell back to plain text for many code blocks:

Language "csharp" is not loaded for syntax highlighting. Add it to `syntaxHighlighting.languages` in your config. Falling back to plain text.
Language "rust" is not loaded ...
Language "php" is not loaded ...
...

Zudoku only loads a small default set of languages for Shiki. Anything outside it (the SDK/code-sample languages used across the docs) wasn't highlighted.

Fix

Set syntaxHighlighting.languages in zudoku.config.tsx.

⚠️ Providing this list replaces Zudoku's defaults (const languages = config.syntaxHighlighting?.languages ?? defaultLanguages), so the defaults (shellscript, javascript, typescript, json, yaml, python, java, go, etc.) are re-listed alongside the additions to avoid regressing currently-working highlighting.

The added languages were gathered by scanning every code fence in docs/, so this covers more than just the warnings reported (e.g. http, toml, sql, lua are used in the docs and would warn too). ansi and velocity are used but aren't loadable Shiki grammars, so they're intentionally left as plain text.

Verification

Rendered the Zudoku syntax-highlight demo page (which exercises all these languages) in the local dev server:

• ✅ Zero "is not loaded for syntax highlighting" warnings in the server log (previously one per language).
• ✅ Every target language now renders with full Shiki token highlighting — confirmed via the DOM (e.g. csharp 50 token spans, rust 47, cpp 68, zig 75, swift 40, kotlin 50, php 37, ruby 29, scala 63, dart 75, elixir 64, ocaml 56, lisp 42, objc 50, powershell 63) — none falling back to plain text.
• ✅ typecheck, prettier --check, guides:check, and lint:admonitions all pass.

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview, Comment	May 29, 2026 8:41pm