Simple content template tool, Prior art or ideas?

I am looking for examples or Ideas from the community on the use of simple content templates.

  • For example any tiddler with the template tag can be searched and a title selected and the content of that template appended at the end of the current tiddler (in view) or at the cursor (in edit).

I was just reviewing @Mohammad’s Kara, todo and interstitial lists and realised a simple tool like this may be ideal for writing prepared lists, such as steps to do a reoccurring item, eg get ingredients, then paste the checklist as needed into a required tiddler.

  • Rather than make a custom tool I thought this deserves a general and easy to use tool.
  • Note this is an additive template content tool, other methods are available to create new tiddlers from a template.

Advanced features

  • Enhance the tool such that the template tiddler;
    • Has special fields to add to the tiddler in which it is being inserted such as tags.
    • Could contain actions to apply to the target tiddler.
    • The title of each template used is appended to a templates-applied list field
  • List all content templates in sidebar tab (add a searchable sublist if have a lot of content) and enable the “link” to be dragged and drop the content of the title into the cursor position in the editor

Is there any prior work that does exactly this?

If you understand what I am trying to do what core or enhanced features should this tool have?