MarieLynneBlock 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>
| Type | When to use |
|---|---|
feat |
A new feature visible to users or consumers |
fix |
A bug fix |
docs |
Documentation only |
style |
Formatting, whitespace — no logic change |
refactor |
Code restructure with no behaviour change |
perf |
Performance improvement |
test |
Adding or fixing tests |
chore |
Build, tooling, dependency updates |
ci |
CI/CD pipeline changes |
revert |
Reverts a previous commit |
Rules:
- Description is lowercase, imperative mood, no trailing period:
fix: handle null session tokennotFixed 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 addBREAKING 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
| Strategy | When to use |
|---|---|
| Merge commit | Preserves full branch history; good for long-lived feature branches |
| Squash and merge | Clean linear history; good for small features or fix PRs |
| Rebase and merge | Linear history without squashing; good when individual commits are meaningful |
Instructions
Writing a commit message
- Identify the type from the change description.
- Identify the scope if the repo has modules or packages.
- Write the subject line:
<type>(<scope>): <imperative description>. - If the change needs explanation (why, not what), add a body paragraph.
- Add a footer for breaking changes, issue references (
Closes #123), or co-authors.
Writing a PR description
- State what the PR does in one sentence (mirrors the commit subject if squashing).
- Add a "Why" section if the motivation is not obvious from the title.
- List the key changes as bullet points.
- Add a test plan: what was tested and how.
- Note any follow-up work or known limitations.
Advising on workflow setup
- 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.
- Recommend a merge strategy consistent with the model.
- 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 logand 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.