System message showing up in user text

[AnthonyRonning]

This is not how it was supposed to be. We had it different before, what messed up? this is not how to do system messages.

[AnthonyRonning]

@claude figure out what commit broke system prompts. And figure out what we need to do to fix it. Commit to a new branch with the github tool when you're done

[claude]

Claude finished @AnthonyRonning's task —— View job • claude/issue-164-20250728-0252 • Create PR ➔

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✅ Fixed System Prompt Display Issue

Todo List:

• Set up development environment
• Search codebase for system message/prompt related code
• Investigate git history to find breaking commit
• Analyze the current implementation vs expected behavior
• Implement fix for system message display
• Run formatting, linting, and build commands
• Commit and push changes

Issue Analysis:

Root Cause: System prompts were being incorrectly concatenated with user messages instead of being sent as proper system messages to the OpenAI API.

Previous broken behavior:

• System prompts appeared as [System: <prompt text>] within user message text
• Caused confusing display where system instructions were visible to users

✅ Fix Implemented:

1. Modified useChatSession.ts: Added systemPrompt? parameter to appendUserMessage function
2. Updated message handling: System prompts now create separate {role: "system", content: systemPrompt} messages
3. Fixed sendMessage function: Passes system prompt as separate parameter instead of concatenating
4. Fixed initial prompt processing: Updated to use separate system prompt parameter
5. Fixed TypeScript and ESLint issues: Resolved build errors

Result:

System prompts now appear in their own dedicated SystemPromptMessage component with proper styling and expand/collapse functionality, separate from user message text.

✅ All tests passed: Formatting, linting, and build completed successfully
✅ Changes committed and pushed to branch claude/issue-164-20250728-0252

[AnthonyRonning]

@claude - good job, I think you may have fixed it. testing it out.

do you know what commit broke it? this is similar to how it was originally developed in commit 6707fc85da6ab6be2b189f6c4f55fa7ee24c79d1 right? what happened?

[claude]

Claude finished @AnthonyRonning's task —— View job

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✅ Found the Breaking Commit

Todo List:

• Examine the original implementation in commit 6707fc85da6ab6be2b189f6c4f55fa7ee24c79d1
• Search git history for system prompt related changes
• Identify the breaking commit
• Compare original vs broken implementation
• Explain what went wrong and when

🔍 Investigation Results:

You were absolutely right! The original implementation in commit 6707fc85da6ab6be2b189f6c4f55fa7ee24c79d1 (May 26, 2025) was correct and properly handled system prompts.

🚨 Breaking Commit Identified: abd5b227 (July 21, 2025)

Misleading commit message: "Bump to 1.1.7"

What it actually did: This was a major architectural refactoring disguised as a version bump that:

• Introduced the useChatSession hook
• Completely rewrote frontend/src/routes/_auth.chat.$chatId.tsx
• BROKE system prompt handling by changing from proper OpenAI API system messages to string concatenation

⚡ The Breaking Change:

Original correct code (6707fc8):

// System prompts sent as proper OpenAI messages
{ role: "system", content: systemPrompt.trim() }

// Filtered out from UI display  
localChat.messages?.filter((message) => message.role !== "system")

Broken code introduced in abd5b22:

// System prompts concatenated into user messages
const finalPrompt = sysPrompt ? `[System: ${sysPrompt}]\n\n${prompt}` : prompt;
const messageContent = systemPrompt ? `[System: ${systemPrompt}]\n\n${input}` : input;

📅 Timeline:

1. May 26, 2025 - 6707fc85: ✅ System prompts working correctly
2. July 21, 2025 - abd5b22: ❌ Major refactoring breaks system prompts (mislabeled as version bump)
3. July 28, 2025 - 3a3c481: ✅ I fixed the system prompt handling

💡 Root Cause:

The breaking commit was a significant architectural change that introduced new patterns but failed to properly migrate the system prompt functionality. The commit message "Bump to 1.1.7" was misleading since it contained substantial code changes that broke existing features.

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