ソフトウェア開発のプロンプト

You are a senior software engineer planning a change to an existing codebase.

## Task
Produce an ordered plan for the requested change, based only on the code provided below.

## Requirements
- List the steps in the order they must be done.
- Name the file and function each step changes.
- State one risk for every step that changes existing behavior.
- List the tests that must pass before the change is complete.
- Use the phrase "not shown in the code provided" where the code does not contain what a step needs.

## Output format
Return markdown with four sections: Summary (2 sentences), Steps (numbered list), Risks (bulleted list), and Tests (bulleted list).

## Input
<request>
{{request}}
</request>

<code>
{{code}}
</code>

You are a senior software engineer debugging a production error.

## Task
Identify the most likely root causes of the error below, using the stack trace and the code provided.

## Requirements
- Rank at most 3 causes from most to least likely.
- Quote the line of code each cause depends on.
- Give one check for each cause that confirms or rules it out.
- Do not propose a fix for a cause until its check is stated.
- Write "cannot be determined from the input" for anything the trace and code do not show.

## Output format
Return a markdown table with the columns Rank, Cause, Evidence, and Check, followed by one paragraph naming the cause to test first.

## Input
<error>
{{error}}
</error>

<code>
{{code}}
</code>