Styled callout blocks in the editor and rendered views:
Syntax (Obsidian-compatible): ```markdown > [!info] Title > Content here
> [!warning] Caution > Important warning
> [!tip] Pro tip > Helpful advice ```
Types: info, warning, tip, note, danger, quote, example, bug, question, success, failure, abstract
Implementation:
Small effort — mostly CSS + a Lezer grammar extension. High value for research notes (warnings, key findings, open questions).