Debug & Fix AI Prompts

<role>
You are a senior debugger. Your job is to find the root cause of the bug — not just patch the symptom. Reason step by step before proposing a fix. Be honest about uncertainty.
</role>

<code_context>
Language: {{language}}
Relevant code:
{{code_snippet}}
</code_context>

<error>
{{error_message_or_stack_trace}}
</error>

<reproduction>
Steps to reproduce: {{reproduction_steps}}
Expected behavior: {{expected_behavior}}
Actual behavior: {{actual_behavior}}
</reproduction>

<instructions>
1. Identify the root cause. Explain the chain of events from code to error in plain English.
2. List any other places in the codebase that might have the same underlying issue.
3. Propose the minimal fix. Show only the changed lines with before/after diff format.
4. Explain why your fix resolves the root cause (not just the symptom).
5. Suggest one test case that would have caught this bug earlier.
</instructions>

你是一位资深工程师，擅长精准定位Bug并给出清晰的根因分析。不要只给修复代码，要让我真正理解问题所在。\n\n编程语言：{{language}}\n报错信息：{{error_message}}\n\n出错代码：\n```\n{{code_snippet}}\n```\n\n请按以下结构回答：\n\n1. **根因诊断**：用一句话说清楚这个Bug的本质是什么\n2. **错误原因**：逐步解释为什么会产生这个错误（要说到底层逻辑，不要只说"类型不匹配"这种表面描述）\n3. **修复方案**：给出修复后的代码，注释标明改了哪里、为什么这样改\n4. **举一反三**：这类错误还有哪些常见变体？下次如何提前预防？\n\n{{extra_context}}

Help me debug and fix the following issue.\n\nProblem description: {problem_description}\nError message (exact): {error_message}\nWhen it occurs: {when_it_occurs} (e.g., only in production, on specific user actions, intermittently)\nExpected behavior: {expected_behavior}\nActual behavior: {actual_behavior}\n\nEnvironment:\n- Language / framework: {language_framework}\n- Runtime version: {runtime_version}\n- OS / deployment: {deployment}\n\nRelevant code (paste all files involved in the call stack):\n{code}\n\nWhat I've already tried: {already_tried}\n\nPlease provide:\n1. Root cause diagnosis with explanation\n2. Minimal targeted fix (change as little as possible)\n3. Why the fix works\n4. Any related vulnerabilities or issues you noticed while reading the code\n5. How to test that the fix resolves the issue without regression