engineering-handbook/git-workflow.md
Adam Moussa 0333e7f8f5 Add engineering handbook
Conventions covering naming, git workflow, commit messages, pull
requests, code review, GitHub standards, AWS infrastructure, SAM
project layout, and secrets management. Commit messages section
adapted from RomuloOliveira/commit-messages-guide (CC-BY-4.0).
2026-05-02 16:42:44 -04:00

86 lines
3 KiB
Markdown

# Git Workflow
## Branching
- Never commit directly to `main`
- Delete branches after merge
- Use the appropriate branch prefix for the type of work:
| Prefix | Use when |
|---|---|
| `feature/<description>` | Adding new functionality or enhancing existing features |
| `bug/<description>` | Fixing a non-urgent defect found during development or testing |
| `hotfix/<description>` | Fixing a production issue that needs immediate attention |
**bug vs hotfix:** Use `bug/` for defects caught before they affect production (failing tests, broken dev flows, issues found in review). Use `hotfix/` only when production is impacted and the fix needs to bypass normal review cadence.
## Commits
- Commit each logical change individually with a descriptive message
- See [commit-messages.md](commit-messages.md) for formatting rules
- Keep the working tree clean: commit or stash before switching context
## Deploy-Then-Merge
The standard flow for changes that deploy to AWS:
1. Create a feature branch (`feature/add-receipt-parser`)
2. Develop and commit locally
3. Open a PR via `gh pr create`
4. Merge the feature branch into `main` locally
5. Deploy to the target environment (`sam deploy`, etc.)
6. Verify in production
7. Merge the PR on GitHub
This ensures production works before the PR closes. If the deploy fails, the PR stays open and `main` on GitHub is still clean.
## Push Discipline
- Push regularly; don't accumulate unpushed commits
- Never force push `main`
- Never amend or rewrite commits already pushed to `main`
- If you need to add context to a past change, use PR descriptions or issue comments
## Versioning
Use [Semantic Versioning](https://semver.org/) (SemVer) as the standard: `MAJOR.MINOR.PATCH`.
| Increment | When |
|---|---|
| `MAJOR` | Breaking changes to the public API or contract (removed endpoints, changed request/response shapes, incompatible config changes) |
| `MINOR` | New functionality that is backwards-compatible (new endpoints, new optional fields, new features) |
| `PATCH` | Backwards-compatible bug fixes, dependency updates, documentation corrections |
### When to version
Not every project needs versioning. Apply SemVer when the project has consumers that depend on its interface:
| Version | Don't version |
|---|---|
| Published packages (npm, PyPI) | Internal SAM stacks with no external consumers |
| Public APIs with external consumers | One-off scripts and migration tools |
| Shared libraries used across repos | Internal tools used only by the team that builds them |
| CLIs distributed to users | |
### How to tag
Create annotated tags on `main` after the PR is merged:
```bash
git tag -a v1.2.0 -m "v1.2.0"
git push origin v1.2.0
```
Start at `v0.1.0` for new projects. Move to `v1.0.0` when the interface is stable and has external consumers.
## Cleaning Up
After a PR is merged:
```bash
git checkout main
git pull
git branch -d feature/add-receipt-parser
```
Don't let stale local branches or untracked project directories accumulate.