Update prompt to match Aider's

main.py

@@ -52,18 +52,28 @@ def git_commit(message):
 
 
 def generate_message(diff):
-    prompt = '''
-Write a ONE LINE git commit message for the following diff.
-Respond with only the commit message.
-Do not include quotes.
-Do not include file extensions.
-DO NOT just say "Update notes", "Add new notes", "Refactor notes", "Make documentation updates".
-Tersely summarize how each note changed.
-Write in imperitive tense.
-\n\n==============\n\n'''
+    prompt = '''You are an expert software engineer that generates concise, \
+one-line Git commit messages based on the provided diffs.
+Review the provided context and diffs which are about to be committed to a git repo.
+Review the diffs carefully.
+Generate a one-line commit message for those changes.
+
+Ensure the commit message:
+- Is in the imperative mood (e.g., \"add feature\" not \"added feature\" or \"adding feature\").
+- Does not exceed one line
+- DO NOT just say "Update notes", "Add new notes", "Refactor notes", "Make documentation updates".
+- Tersely summarize how each note changed.
+
+Reply only with the one-line commit message, without any additional text, explanations, or line breaks.
+
+Reply only with the one-line commit message, without any additional text, explanations, \
+or line breaks.
+\n\n==============\n\nDiffs:\n\n'''
 
     prompt += diff
 
+    logging.debug('Using prompt:\n%s', prompt)
+
     message = llama(prompt)
 
     if not message: