OpenAI instructions not set correctly

[ag14774]

Initial Checks

• I confirm that I'm using the latest version of Pydantic AI
• I confirm that I searched for my issue in https://github.com/pydantic/pydantic-ai/issues before opening this issue

Description

Hello team,

So I've played around with the new instructions feature and from my tests and from reading the code, it seems to me that the instruction is only applied to the first LLM call. Even within a single .run, if there is a tool call, upon returning back from the tool call, the instruction will no longer be applied. Is this intented behavior? I think this is because instructions are extracted by looping the messages in reverse, and since there is a new request made by the tool, it no longer finds the instruction.

Example Code

Python, Pydantic AI & LLM client version

Python 3.12
Pydantic 0.1
OpenAI completions API

[DouweM]

@Kludex Since you built the instructions feature (#1360), could you have a look at this question please?

[Kludex]

We solved this a couple of hours ago. It's fixed in 0.1.1.