pr-summarize - PR Changelog Generator

Generate a clear, minimal changelog for the current branch.

Instructions

1. •Detect the default branch: BASE=$(git remote show upstream 2>/dev/null | sed -n 's/.*HEAD branch: //p') || BASE=main
2. •Run git log --oneline -10 $BASE to study the repo's commit message convention (e.g., feat:, MSSQL:, [COMPONENT], plain imperative, etc.)
3. •Run git log --oneline $BASE..HEAD to get commits on the branch
4. •Run git diff $BASE...HEAD --stat to see changed files
5. •Run git diff $BASE...HEAD to read the actual changes
6. •Produce a changelog using the template below, with the title matching the repo's convention
7. •If this is in main branch, create a new branch for this change

Template

## <Short imperative title describing the change>

## Why

<One sentence explaining the motivation or problem>

## How (at most 3 points, start with verb)

- <Bullet points describing what was done, keep each line short>
- <Focus on what changed, not implementation details>

Rules

• •Title must follow the repo's commit message convention detected in step 1
• •"Why" is one sentence max
• •"How" bullets should be extremely minimal and clear
• •No fluff, no over-explanation
• •Output only the changelog, nothing else