m Function Matcher for Sherlock

This plugin enables Sherlock (VS Code extension) to recognize m.message() function calls used by Paraglide JS.

What it does

• Inline previews: See translations directly in your code editor
• Message extraction: Extract hardcoded strings into messages
• Linting: Get warnings for missing or invalid message references

Supported file types

• TypeScript (.ts, .tsx)
• JavaScript (.js, .jsx)
• Svelte (.svelte)
• Vue (.vue)
• Astro (.astro)

Installation

Add the plugin to your project.inlang/settings.json:

{
	"modules": [
		"https://cdn.jsdelivr.net/npm/@inlang/plugin-m-function-matcher@latest/dist/index.js"
	]
}

Then install Sherlock from the VS Code marketplace.

Matched patterns

The plugin recognizes these patterns:

Pattern	Example
Simple call	m.welcome()
With variables	m.greeting({ name: "World" })
In JSX	{m.button_label()}

Project checks

Find unused messages with the inlang CLI:

npx @inlang/cli check --project ./project.inlang --unused-messages

The plugin exposes analyzeUsage for the SDK's checkProject({ project, files }) API. ESM JavaScript/TypeScript, Svelte and Astro analysis recognizes static message reads, function references, named imports and namespace imports. Dynamic accesses, namespace escapes, parse failures and unsupported formats report incomplete analysis, which withholds unused-message findings and deletion fixes. Each issue names the file and, where possible, the location (start/end) of the construct, e.g. m[`${fieldName}_label`].

See the SDK checks and fixes documentation for source snapshot requirements, supported syntax, limits and programmatic usage. This capability is separate from the existing IDE reference matchers.

Bundle size: the analysis bundles Babel's parser and Svelte's compiler, so dist/index.js is about 840 KB minified (28 KB before). It is not lazy-loaded: the SDK imports a plugin module as a single data: URL, where a separately loaded chunk can't be resolved.

Svelte analysis covers instance/module scripts (JavaScript or TypeScript) and template expressions, blocks, snippets, components and directives. Include .svelte files in the full source snapshot; no extra configuration is required. External scripts and unsupported script languages report incomplete analysis.

Astro analysis covers the frontmatter and inline scripts outside expressions (TypeScript) plus every {…} expression in the template and attributes such as title={m.someKey()} or set:html. Backtick attribute interpolations and nested Astro shorthand attributes are supported, including in templates containing HTML comments. Single- and double-quoted attribute values, known data scripts such as JSON-LD, <style> blocks and HTML comments are literal text. Include .astro files in the full source snapshot; no extra configuration is required. External scripts, regardless of src syntax or self-closing form, scripts nested inside expressions, and malformed input report incomplete analysis.