System prompt is sent incorrectly

[BritishTeapot]

In smartcommit, requests for the API are sent as a single user message:

User:
[System prompt]
Here is the Git diff:
---
[Git diff]
---
Write a commit message:

However, this is very inefficient, and underutilises the instruction following capability of the LLM.

Proposed solution:

Send requests as two messages, one from the system, and one from the user:

System: [System prompt]
User: Here is the Git diff:
---
[Git diff]
---
Please write a commit message.