Skip to content

Navigation Menu

Sign in
Appearance settings

Search code, repositories, users, issues, pull requests...

Provide feedback

We read every piece of feedback, and take your input very seriously.

Saved searches

Use saved searches to filter your results more quickly

Sign up
Appearance settings

Fix: protect instruction insertion from being placed directly before function call #3269

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
UlookEE wants to merge 2 commits into google:main
base: main
Choose a base branch
Loading
from UlookEE:protect_insert_invalid_instruction

Conversation

@UlookEE
Copy link

@UlookEE UlookEE commented Oct 24, 2025
edited
Loading

...a function call.

Please ensure you have read the contribution guide before creating a pull request.

Link to Issue or Description of Change

1. Link to an existing issue (if applicable):
Fix #3229

  • Closes: #issue_number
  • Related: #issue_number

Testing Plan

_Please describe the tests that you ran to verify your changes. This is required
for all PRs that are not small documentation or typo fixes.

Make unit tests, test complete

Unit Tests:

  • I have added or updated unit tests for my change.
  • All unit tests pass locally.

Please include a summary of passed pytest results.

Manual End-to-End (E2E) Tests:

Please provide instructions on how to manually test your changes, including any
necessary setup or configuration. Please provide logs or screenshots to help
reviewers better understand the fix.

Checklist

  • I have read the CONTRIBUTING.md document.
  • I have performed a self-review of my own code.
  • I have commented my code, particularly in hard-to-understand areas.
  • I have added tests that prove my fix is effective or that my feature works.
  • New and existing unit tests pass locally with my changes.
  • I have manually tested my changes end-to-end.
  • Any dependent changes have been merged and published in downstream modules.

Additional context

Add any other context or screenshots about the feature request here.

Copy link

Summary of Changes

Hello @UlookEE, I'm Gemini Code Assist1 ! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request resolves an issue where system instructions could be inadvertently inserted into an LLM request at an invalid position, specifically immediately preceding user messages or function call interactions. The changes introduce a robust validation mechanism to ensure instructions are always placed in appropriate locations within the content sequence, thereby preserving the intended conversational structure and tool execution order.

Highlights

  • Instruction Insertion Logic Refinement: The logic for inserting instructions into LLM request contents has been updated to prevent them from being placed directly before user content or function calls, ensuring a more coherent conversation flow.
  • New Helper Function: A new private helper function, _is_valid_instruction_position, was introduced to determine appropriate insertion points for instructions, checking for user roles and function call parts.
  • Enhanced Test Coverage: New unit tests have been added to specifically verify that instructions are correctly skipped when encountering function call content or leading user content, confirming the fix's effectiveness.
Using Gemini Code Assist

The full guide for Gemini Code Assist can be found on our documentation page, here are some quick tips.

Invoking Gemini

You can request assistance from Gemini at any point by creating a comment using either /gemini <command> or @gemini-code-assist <command>. Below is a summary of the supported commands on the current page.

Feature Command Description
Code Review /gemini review Performs a code review for the current pull request in its current state.
Pull Request Summary /gemini summary Provides a summary of the current pull request in its current state.
Comment @gemini-code-assist Responds in comments when explicitly tagged, both in pull request comments and review comments.
Help /gemini help Displays a list of available commands.

Customization

To customize Gemini Code Assist for GitHub experience, repository maintainers can create a configuration file and/or provide a custom code review style guide (such as PEP-8 for Python) by creating and adding files to a .gemini/ folder in the base of the repository. Detailed instructions can be found here.

Limitations & Feedback

Gemini Code Assist may make mistakes. Please leave feedback on any instances where its feedback is incorrect or counter productive. You can react with 👍 and 👎 on @gemini-code-assist comments. If you're interested in giving your feedback about your experience with Gemini Code Assist for Github and other Google products, sign up here.

You can also get AI-powered code generation, chat, as well as code reviews directly in the IDE at no cost with the Gemini Code Assist IDE Extension.

Footnotes

  1. Review the Privacy Notices, Generative AI Prohibited Use Policy, Terms of Service, and learn how to configure Gemini Code Assist in GitHub here. Gemini can make mistakes, so double check it and use code with caution.

Copy link

@gemini-code-assist gemini-code-assist bot left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Code Review

This pull request correctly addresses the issue of preventing instruction insertion directly before a function call. The logic has been refactored into a new helper function, _is_valid_instruction_position, which improves code clarity. The accompanying unit tests are thorough and validate the new behavior effectively. I have one suggestion to make the implementation of the new helper function more concise.

@adk-bot adk-bot added the core [Component] This issue is related to the core interface and implementation label Oct 24, 2025
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Reviewers

1 more reviewer

@gemini-code-assist gemini-code-assist[bot] gemini-code-assist[bot] left review comments

Reviewers whose approvals may not affect merge requirements

At least 1 approving review is required to merge this pull request.

Assignees

No one assigned

Labels

core [Component] This issue is related to the core interface and implementation

Projects

None yet

Milestone

No milestone

Development

Successfully merging this pull request may close these issues.

Mixing static_instruction and instruction prevents tool use in Anthropic-family LLMs.

2 participants

AltStyle によって変換されたページ (->オリジナル) /