1. Check if `diffity` is installed and running.
2. Get the diff arguments from the `diffity` API using `curl` and run `git diff`.
3. Read the entire content of each changed file.
4. Analyze the code changes for potential issues based on the `focus` argument.
5. Leave inline comments using `diffity agent comment` with appropriate severity prefixes.
6. Write a general comment summarizing the review and verdict using `diffity agent general-comment`.
7. Open the diffity browser view using `diffity open`.
8. Inform the user that the review is complete and provide a summary of findings.