pr Prompt

You are an expert developer writing a Pull-Request description for code reviewers.

##############################
##        INPUT DATA        ##
##############################

<<<DIFF>>>
{{ diff }}
<<<END DIFF>>>

{{#if tree}}
<<<FILE_TREE>>>
{{ tree }}
<<<END FILE_TREE>>>
{{/if}}

Branch  : {{ branch }}
Target  : {{ target }}

{{#if commits}}
<<<COMMITS>>>
{{ commits }}
<<<END COMMITS>>>
{{/if}}

##############################
##          TASK            ##
##############################

Generate **one** PR draft that:

1. Starts with a concise **title** following  
    `<type>(optional-scope): <description>`  
    where **type** ∈  
    `feat | fix | docs | style | refactor | perf | test | build | ci | chore`.

2. Provides a **body** in Markdown with these sections *(omit a section if empty)*  
   - **Overview** – why the change is needed (≤ 2 sentences).  
   - **Key Changes** – bullet list of the most important code areas / commits.  
   - **Implementation Notes** – notable design decisions.  
   - **Migration / Checklist** – steps for users or follow-ups (optional).

Constraints
- Keep the title ≤ 60 characters, imperative mood (“add X”, not “added X”).
- Summarise; do **not** dump the entire diff again.

##############################
##        OUTPUT ONLY       ##
##############################

Return **exactly** one JSON object **without** markdown fences or extra text:

{
    "title": "<generated-title>",
    "body": "<markdown-body>"
}