Check out Kent Beckman's Prune for ideas along this line: https://www.facebook.com/notes/kent-beck/prune-a-code-editor-that-is-not-a-text-editor/101206184216001

Check out Kent Beckman's Prune for ideas along this line: https://www.facebook.com/notes/kent-beck/prune-a-code-editor-that-is-not-a-text-editor/1012061842160013 https://www.facebook.com/notes/kent-beck/prune-a-code-editor.... It's not quite the same since it's more like an enforced paredit, but it contains a lot of similar ideas and also enforces indentation.