Python: Updated instructions/system_message logic in GitHub Copilot agent#3625
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dmytrostruk merged 4 commits intomicrosoft:mainfrom Feb 3, 2026
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Pull request overview
This PR adds an instructions parameter to the GitHubCopilotAgent constructor and implements configurable system_message mode (append/replace) for the GitHub Copilot agent integration. The changes align the API with other agents in the framework (like ClaudeAgent) and resolve issue #3571.
Changes:
- Added
instructionsparameter toGitHubCopilotAgentconstructor that maps tosystem_message.content - Updated
GitHubCopilotOptionsto usesystem_messagewith configurable mode instead of plaininstructionsstring - Implemented runtime options support in session creation to allow overriding system_message per request
- Updated all sample code to use the new API pattern with
instructionsas a direct parameter - Added comprehensive test coverage for the new functionality including precedence rules and runtime overrides
Reviewed changes
Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.
Show a summary per file
| File | Description |
|---|---|
| python/packages/github_copilot/agent_framework_github_copilot/_agent.py | Core implementation: added instructions parameter, _prepare_system_message() method, runtime options support in session creation, and updated GitHubCopilotOptions TypedDict |
| python/packages/github_copilot/tests/test_github_copilot_agent.py | Added comprehensive tests for instructions parameter, system_message configuration, precedence rules, and runtime options |
| python/samples/getting_started/agents/github_copilot/github_copilot_basic.py | Updated to use instructions parameter and added runtime_options_example demonstrating system_message override |
| python/samples/getting_started/agents/github_copilot/github_copilot_with_session.py | Updated to use instructions parameter and removed unnecessary GitHubCopilotOptions import |
| python/samples/getting_started/agents/github_copilot/github_copilot_with_mcp.py | Updated to use instructions parameter with mcp_servers in default_options |
| python/samples/getting_started/agents/github_copilot/github_copilot_with_url.py | Updated to use instructions parameter and simplified agent initialization |
| python/samples/getting_started/agents/github_copilot/github_copilot_with_shell.py | Updated to use instructions parameter and simplified agent initialization |
| python/samples/getting_started/agents/github_copilot/github_copilot_with_file_operations.py | Updated to use instructions parameter and simplified agent initialization |
| python/samples/getting_started/agents/github_copilot/github_copilot_with_multiple_permissions.py | Updated to use instructions parameter and simplified agent initialization |
TaoChenOSU
approved these changes
Feb 2, 2026
giles17
approved these changes
Feb 2, 2026
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Feb 2, 2026
…gent (#3625) * Updated instructions handling * Small improvement * Included runtime options in session creation logic
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Motivation and Context
Resolves: #3571
instructionsparameter toGitHubCopilotAgentconstructor (alignment with other agents), which maps tosystem_message.contentpropertysystem_messageparameter toGitHubCopilotOptionswith the ability to configuresystem_message.modeContribution Checklist