Openpr

Open PR

Generate a comprehensive pull request description based on all commits on the current branch (compared to the default base branch), then open the PR using the GitHub CLI (gh).

Workflow

1. Detect the Base Branch

# Try to detect the default branch (main or master)
git remote show origin | grep "HEAD branch" | awk '{print $NF}'

Store the result as BASE_BRANCH.

2. Get the Current Branch Name

git branch --show-current

Store the result as CURRENT_BRANCH. If the current branch is the same as BASE_BRANCH, stop and inform the user they need to be on a feature branch.

3. Gather Commit History

git log ${BASE_BRANCH}..${CURRENT_BRANCH} --pretty=format:"%h %s" --reverse

This gives the list of all commits on this branch that are not on the base branch, in chronological order.

4. Gather the Full Diff Summary

git diff ${BASE_BRANCH}...${CURRENT_BRANCH} --stat

This gives a summary of files changed, insertions, and deletions.

5. Optionally Read Detailed Diffs

If the diff is small enough (under ~2000 lines), also read the full diff for richer context:

git diff ${BASE_BRANCH}...${CURRENT_BRANCH}

If the diff is too large, rely on the commit messages and --stat output only.

6. Generate the PR Title

• Derive a concise, descriptive PR title from the overall theme of the changes.
• Format: imperative mood, no prefix, max ~72 characters.
• Examples: Add user authentication flow, Fix race condition in job scheduler, Refactor database connection pooling.

7. Generate the PR Description

Use the following markdown template. Fill in every section thoughtfully based on the commits and diff:

## Summary

<!-- 2-4 sentence high-level overview of what this PR does and why -->

## Changes

<!-- Grouped list of meaningful changes. Group by area/theme, not by commit.
     Each item should describe WHAT changed and WHY, not just repeat commit messages. -->

- **Area/Module**: Description of change
- **Area/Module**: Description of change

## How to Test

<!-- Step-by-step instructions a reviewer can follow to verify the changes work -->

1. Step one
2. Step two

## Notes for Reviewers

<!-- Optional: anything reviewers should pay attention to, open questions,
     trade-offs made, or follow-up work planned -->

Guidelines for the description:

• Summary: Explain the motivation and the approach. A reviewer who reads only this section should understand the PR.
• Changes: Group related changes together by theme or module. Do NOT just list commits verbatim — synthesize them into meaningful bullets. If a commit was a fixup or correction of a previous commit on the branch, merge them into one bullet.
• How to Test: Be specific. Include commands, URLs, or user flows. If there are automated tests, mention how to run them.
• Notes for Reviewers: Include anything unusual — risky areas, things you're unsure about, intentional shortcuts, or planned follow-ups. If there's nothing noteworthy, omit this section.

8. Confirm with the User

Before opening the PR, display the generated title and description to the user and ask for confirmation or edits.

9. Push and Open the PR

Once confirmed:

# Ensure the branch is pushed
git push -u origin ${CURRENT_BRANCH}

# Open the PR via GitHub CLI
gh pr create --title "<GENERATED_TITLE>" --body "<GENERATED_DESCRIPTION>" --base ${BASE_BRANCH}

If gh is not installed or not authenticated, inform the user and provide the generated title and description so they can copy/paste it manually.

10. Share the PR Link

After the PR is created, display the PR URL to the user.

Edge Cases

• No commits on branch: Inform the user there are no changes to open a PR for.
• Unpushed base branch changes: Warn the user if the local base branch is behind remote.
• Draft PRs: If the user says /openpr draft, add the --draft flag to gh pr create.
• Existing PR: If a PR already exists for this branch, inform the user and provide the link. Check with gh pr view --json url.
• Merge conflicts: If the branch has conflicts with base, warn the user but still allow PR creation.

Dependencies

• git (required)
• gh — GitHub CLI (required for automatic PR creation; graceful fallback if missing)

Examples

User input:

/openpr

User input (draft):

/openpr draft