Lume — VS Code Syntax Highlighting

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A local extension providing syntax highlighting, comment toggling, bracket pairing and auto-closing for .lume files. No network download needed, no vsce packaging required for local use.

Structure

editor/lume-vscode/
├── package.json                    # language id "lume", .lume extension, grammar registration
├── language-configuration.json     # // and /* */ comments, {}()[] pairs
└── syntaxes/lume.tmLanguage.json   # TextMate grammar (highlighting rules)

Install (two ways)

Option A: symlink into the extensions dir (recommended — edits take effect on reload)

VSCODE_EXT=~/.vscode/extensions
ln -s ../work/research/lume/editor/lume-vscode "$VSCODE_EXT/cnb.lume-0.1.0"

Then reload VS Code (Cmd+Shift+P → "Developer: Reload Window"). After editing syntaxes/*.json, reload — no reinstall needed.

For Cursor / VS Code Insiders / Remote-SSH, replace ~/.vscode/extensions with ~/.cursor/extensions, ~/.vscode-insiders/extensions, or ~/.vscode-server/extensions.

Option B: package a .vsix (distributable)

make vsix        # from the repo root
# → editor/lume-vscode/lume-0.1.0.vsix

Install the vsix via VS Code "Extensions: Install from VSIX...". Bumping a version? Increment version in package.json first.

Highlight coverage

• Keywords: server route tool func let return if else while
• Types: type int float string bool Result (storage.type, TS-style)
• Literals: true false null, numbers, strings (with \n \t \\ \" escapes)
• Built-ins: print str len keys get json stringify now
• Logic / comparison / assignment operators, ?
• Comments and auto-pairing

Known trade-offs

• Type keywords (type/int/...) can also be ordinary identifiers (field names, int("42")); they are always highlighted as type keywords — purely cosmetic, no functional impact.
• Type keywords are not highlighted as built-ins; int inside int(...) renders as a type.