igmarin/rails-tdd-loop
skills/workflows/rails-tdd-loop/SKILL.md
Orchestrates the full Rails test-driven development cycle: generates a failing spec first, implements minimal code to pass, refactors, then produces YARD documentation and a self-reviewed PR. Use when practicing test-driven development, red-green-refactor, TDD workflow, writing tests before code, adding tests first, or building a Rails feature where specs must gate implementation.
$ install --global
skillsauthnpx skillsauth add igmarin/rails-agent-skills rails-tdd-loopInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Last scanned: May 4, 2026, 2:45 AM46.3s2 files scanned
SKILL.md
- name:
- rails-tdd-loop
- license:
- MIT
- description:
- >
- Orchestrates the full Rails test-driven development cycle:
- generates a failing spec first, implements minimal code to pass, refactors, then produces YARD documentation and a self-reviewed PR. Use when practicing test-driven development, red-green-refactor, TDD workflow, writing tests before code, adding tests first, or building a Rails feature where specs must gate implementation.
- version:
- 1.0.0
- keywords:
- rails, tdd, workflow, feature, implementation, testing, orchestration
Rails TDD Loop — Complete Feature Workflow
Workflow Phases
Phase 1: Context & Test Design
- skills/context/rails-context-engineering — Load schema, routes, nearest patterns (ensures context matches codebase)
- skills/testing/rails-tdd-slices — Choose the correct first failing spec (model→model spec, API→request, UI+DB→system)
- skills/testing/rspec-best-practices — Write the test and verify it FAILS (use
let/build, confirm failure is for missing feature)
HARD GATE — Test Feedback Checkpoint:
- Test EXISTS (written and saved)
- Test has been RUN
- Test FAILS for the correct reason (feature missing, not typo/config)
| Failure type | Example | Action |
|-------------|---------|--------|
| Correct | undefined method 'full_name' | Proceed to implementation |
| Incorrect | syntax error, factory not registered | Return to rspec-best-practices |
If test feedback is NOT OK: Return to rspec-best-practices and refine.
Phase 2: Implementation
-
Implementation Proposal Checkpoint — Propose approach (example: "User#full_name: concatenate first_name + last_name with space")
-
User confirms approach — Wait for explicit approval
-
Implement minimal code to pass the test (single method, no premature abstractions, simplest thing that works)
-
Verify test passes — Run the spec again:
bundle exec rspec spec/path/to/your_spec.rb
If test does NOT pass: Return to implementation (minimal changes, re-verify).
Phase 3: Iterate (Optional)
Check: More behaviors to implement?
- Yes: Return to Phase 1 (rspec-best-practices) for next behavior
- No: Proceed to Phase 4
Phase 4: Finish
- Linters + Full Test Suite:
bundle exec rubocop bundle exec brakeman --no-pager bundle exec rspec - skills/patterns/yard-documentation — Document public Ruby API (code documentation)
- skills/code-quality/rails-code-review — Self-review the PR (quality assurance)
- Open PR — Feature complete
Integration
Workflow complete → PR ready. Bug mid-implementation → skills/testing/rails-bug-triage. Security/architecture concerns → skills/code-quality/rails-security-review / skills/code-quality/rails-architecture-review.
Example
Inline example with file structure:
spec/models/user_spec.rb:
RSpec.describe User do
describe '#full_name' do
let(:user) { build(:user, first_name: 'John', last_name: 'Doe') }
it 'concatenates first and last name' do
expect(user.full_name).to eq('John Doe')
end
end
end
app/models/user.rb:
def full_name
"#{first_name} #{last_name}"
end
See assets/example.md for complete end-to-end walkthrough with commands and phases.
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