[FEATURE] Add system prompt to config

[edenreich]

Summary

Make the system prompt configurable, the command should be infer config set-system "You are an helpful assistant."

This will set a system prompt in the config and will be included in the SDK's messages as a system prompt.

Acceptance Criteria

• System prompt is configurable via command or by modifying the config directly
• The configured system prompt is added to the API request via the SDK's messages
• It's documented

[edenreich]

@claude Can you work on this?

[claude]

Claude finished @edenreich's task —— View job • claude/issue-25-20250812-2252 • Create PR ➔

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System prompt configuration feature completed! ✅

I have successfully implemented the system prompt configuration feature as requested.

Todo List

• Set up development environment and understand project structure
• Examine existing config system and command structure
• Add system prompt field to config structure
• Implement infer config set-system command
• Update SDK integration to include system prompt in API messages
• Test the implementation
• Update documentation
• Run quality checks and commit changes

What was implemented:

1. Configuration Structure: Added system_prompt field to ChatConfig struct
2. New Command: Implemented infer config set-system [SYSTEM_PROMPT] command
3. SDK Integration: Updated chat service to include system prompt as a system message in API requests
4. Documentation: Updated CLAUDE.md with new command usage and configuration examples

Usage Examples:

# Set a system prompt
infer config set-system "You are a helpful assistant."

# The system prompt will be saved in .infer/config.yaml:
# chat:
#   default_model: ""
#   system_prompt: "You are a helpful assistant."

# The prompt is automatically included in all chat sessions
infer chat

Technical Implementation:

• System prompt is stored in the chat.system_prompt configuration field
• The chat service prepends system prompt as a system message before any user messages
• System prompt and tools system messages are both supported and work together
• All existing functionality remains unchanged

All acceptance criteria have been met:

• ✅ System prompt is configurable via command or by modifying the config directly
• ✅ The configured system prompt is added to the API request via the SDK's messages
• ✅ It's documented

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[ig-semantic-release-bot]

🎉 This issue has been resolved in version 0.10.0 🎉

The release is available on:

• v0.10.0
• GitHub release

Your semantic-release bot 📦🚀