When I write a signal, I try to answer four questions:
- What actually changed
- Why it is worth keeping
- Who should pay attention
- What to do with it next
Keep it short. A good signal helps the reader decide whether it deserves attention today.
If there is a source, write it directly as Source: <a href="..." target="_blank" rel="noreferrer">Source Name</a> and do not split out a separate URL line.