git-workflow— agent skill

What this skill does

Covers the full git workflow for a software project: branch naming conventions, commit message authoring (Conventional Commits standard), PR description templates, and merge strategy advice. It produces ready-to-use git artefacts, not generic advice.

When to use it

• User wants to write a commit message for a set of changes.
• User asks about branch naming, PR conventions, or merge strategy.
• User wants to set up or document a git workflow for a project.
• User wants a PR description written from a diff or change summary.

Key concepts

Conventional Commits

Format: <type>(<scope>): <description>

Rules:

• Description is lowercase, imperative mood, no trailing period: fix: handle null session token not Fixed the null session token issue.
• Scope is optional but recommended for multi-module repos: feat(auth): add OAuth2 login
• Breaking changes: append ! after type/scope and add BREAKING CHANGE: footer: feat(api)!: remove v1 endpoint
• Body and footer are separated from subject by a blank line.

Branch naming

Pattern: <type>/<short-description> using the same type vocabulary as Conventional Commits.

Examples: feat/guest-checkout, fix/null-session-token, chore/upgrade-dependencies, docs/api-reference

Rules:

• Use hyphens, not underscores or slashes within the description.
• Keep it short enough to read in a terminal (under 50 characters total).
• Include a ticket reference if the team uses one: feat/PROJ-123-guest-checkout.

Merge strategies

Instructions

Writing a commit message

1. Identify the type from the change description.
2. Identify the scope if the repo has modules or packages.
3. Write the subject line: <type>(<scope>): <imperative description>.
4. If the change needs explanation (why, not what), add a body paragraph.
5. Add a footer for breaking changes, issue references (Closes #123), or co-authors.

Writing a PR description

1. State what the PR does in one sentence (mirrors the commit subject if squashing).
2. Add a "Why" section if the motivation is not obvious from the title.
3. List the key changes as bullet points.
4. Add a test plan: what was tested and how.
5. Note any follow-up work or known limitations.

Advising on workflow setup

1. Recommend a branching model based on team size and release cadence:

• Small team / continuous deployment → trunk-based development with short-lived feature branches.
• Larger team / scheduled releases → Gitflow or a simplified variant.

1. Recommend a merge strategy consistent with the model.
2. Suggest protected branch rules (require PR, require review, require CI pass).

Output format

Commit message

<type>(<scope>): <description>

[optional body — explain why, not what]

[optional footer — BREAKING CHANGE, Closes #NNN, Co-authored-by]

PR description

## What

[One sentence: what this PR does.]

## Why

[Why this change is needed — link to issue or ticket if applicable.]

## Changes

- [Key change 1]
- [Key change 2]

## Test plan

- [ ] [What was tested and how]
- [ ] [Edge case verified]

## Notes

- [Follow-up work, known limitations, or deployment considerations]

Branch name

<type>/<short-description>

Examples

Example 1 — Commit message from a change description

Input: "I added a price filter to the search results page. It filters by min and max price and preserves the filter when navigating back."

Expected output:

feat(search): add price range filter to results page

Preserves min/max values on browser back navigation so users
do not lose their filter context between page visits.

Example 2 — PR description from a diff summary

Input: "Fixed a bug where the session token was not cleared on logout, leaving users authenticated after clicking sign out."

Expected output:

## What
Fix session token not cleared on logout.

## Why
Users remained authenticated after signing out because the token cookie
was not explicitly expired. Closes #412.

## Changes
- Expire session cookie with `Max-Age=0` on logout handler
- Add integration test for post-logout authenticated request

## Test plan
- [ ] Log in, click sign out, attempt to access protected route — expect 401
- [ ] Verify cookie is absent in browser DevTools after logout

Notes

• Commit messages are read by humans in git log and by tools (changelogs, release notes, semantic versioning). Write for both audiences.
• Never include "WIP" or "temp" in a commit that will land on the main branch.
• If the user's repo has an existing commit style, match it — do not impose Conventional Commits without noting the deviation.
• For monorepos, the scope is the package or service name, not a file path.