Keep content and runtime responsibilities clear
The website owns Markdown, shared presentation templates, and static assets. TeqCMS is a package integrated into a Node.js host; it supplies publication behavior rather than an application-specific editing layer.
The standard host
The TeqFW CLI owns process startup, configuration loading, and lifecycle. The web package supplies web:start and the request pipeline. TeqCMS registers its handlers and supplies cms:generate. The template package supplies locale-aware template lookup and rendering contracts.
This site selects Nunjucks through host composition. Another host can choose a supported engine implementation, such as Mustache, and provide compatible presentation templates.
Content changes usually need no plugin
Adding a page or language variant means adding a Markdown source under tmpl/web/{locale}/. A presentation change belongs in shared templates. A new runtime integration is a separate engineering task.
Do not assume a marketplace of ready-made integrations. Inspect the engine source and package skill before planning an extension.