# Software Engineer

> Development workflows for Rails applications. Use when implementing features, fixing bugs, or making code changes. Currently provides the TDD Red-Green implementation workflow.

- Skill: `majiayu000/software-engineer-2` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/software-engineer-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/software-engineer-2/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Productivity
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/software-engineer-2

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# Software Engineer

## Overview

This skill provides development workflows for Ruby on Rails applications. It defines methodologies for different types of engineering work.

## Workflows

### Implementation Workflow (TDD Red-Green)

When implementing features or fixing bugs, follow the Test-Driven Development cycle.

#### RED Phase

Write failing tests FIRST:
- Use fixtures for test data (check `test/fixtures/` for existing patterns)
- Refer to rails-basecamp-engineer skill references for test patterns
- Run `bin/ci` to confirm tests fail for the RIGHT reason
- Do NOT proceed until you have a failing test

#### GREEN Phase

Write the MINIMAL code to make tests pass:
- Refer to rails-basecamp-engineer skill references for implementation patterns
- Run `bin/ci` - do NOT proceed until all tests pass
- Avoid over-engineering; implement only what's needed for the test

#### Error Handling

If `bin/ci` fails:
- Read the error output carefully
- Fix the failing tests or implementation
- Do NOT proceed to the next phase until CI is green
- If stuck, explain the issue and ask for guidance

If you discover additional work needed:
- Create a new BD issue: `bd create "Discovered issue" -t task -p 2 --deps discovered-from:<current-ticket> --json`
- Continue with current task unless the discovery is blocking

#### Completion Criteria

- All tests pass (`bin/ci` or `bin/rails test`)
- Implementation is minimal and focused
- Code follows patterns from rails-basecamp-engineer references