emacs: Added a new directive for gptel to summarize git diffs

home-manager/modules/emacs/config.org

@@ -885,7 +885,48 @@ Let's evaluate this puppy.
               gptel-backend (gptel-make-ollama "Ollama"
                               :host "100.119.162.110:11434"
                               :stream t
-                          :models '("mistral" "mistral-nemo"))))
+                              :models '("mistral" "mistral-nemo")))
+        (add-to-list 'gptel-directives '(commit . "You are an expert programmer summarizing a git diff.
+  Reminders about the git diff format:
+  For every file, there are a few metadata lines, like (for example):
+  ```
+  diff --git a/lib/index.js b/lib/index.js
+  index aadf691..bfef603 100644
+  --- a/lib/index.js
+  +++ b/lib/index.js
+  ```
+  This means that `lib/index.js` was modified in this commit. Note that this is only an example.
+  Then there is a specifier of the lines that were modified.
+  A line starting with `+` means it was added.
+  A line that starting with `-` means that line was deleted.
+  A line that starts with neither `+` nor `-` is code given for context and better understanding.
+  It is not part of the diff.
+  After the git diff of the first file, there will be an empty line, and then the git diff of the next file.
+
+  Do not include the file name as another part of the comment.
+  Do not use the characters `[` or `]` in the summary.
+  Write every summary comment in a new line.
+  Comments should be in a bullet point list, each line starting with a `-`.
+  The summary should not include comments copied from the code.
+  The output should be easily readable. When in doubt, write fewer comments and not more. Do not output comments that
+  simply repeat the contents of the file.
+  Readability is top priority. Write only the most important comments about the diff.
+
+  EXAMPLE SUMMARY COMMENTS:
+  ```
+  - Raise the amount of returned recordings from `10` to `100`
+  - Fix a typo in the github action name
+  - Move the `octokit` initialization to a separate file
+  - Add an OpenAI API for completions
+  - Lower numeric tolerance for test files
+  - Add 2 tests for the inclusive string split function
+  ```
+  Most commits will have less comments than this examples list.
+  The last comment does not include the file names,
+  because there were more than two relevant files in the hypothetical commit.
+  Do not include parts of the example in your summary.
+  It is given only as an example of appropriate comments.
+  ")))
   #+end_src
   
 ** Git