Tdd Workflows Tdd Green

1---
2name: tdd-workflows-tdd-green
3description: Implement the minimal code needed to make failing tests pass in the TDD green phase.
4---
5 
6# Green Phase: Simple function
7def product_list(request):
8    products = Product.objects.all()
9    return JsonResponse({'products': list(products.values())})
10 
11# Refactor: Class-based view
12class ProductListView(View):
13    def get(self, request):
14        products = Product.objects.all()
15        return JsonResponse({'products': list(products.values())})
16 
17# Refactor: Generic view
18class ProductListView(ListView):
19    model = Product
20    context_object_name = 'products'
21```
22 
23### Express Patterns
24 
25**Inline → Middleware → Service Layer:**
26```javascript
27// Green Phase: Inline logic
28app.post('/api/users', (req, res) => {
29  const user = { id: Date.now(), ...req.body };
30  users.push(user);
31  res.json(user);
32});
33 
34// Refactor: Extract middleware
35app.post('/api/users', validateUser, (req, res) => {
36  const user = userService.create(req.body);
37  res.json(user);
38});
39 
40// Refactor: Full layering
41app.post('/api/users',
42  validateUser,
43  asyncHandler(userController.create)
44);
45```
46 
47## Use this skill when
48 
49- Moving from red to green in a TDD cycle
50- Implementing minimal behavior to satisfy tests
51- You want to keep implementation intentionally simple
52 
53## Do not use this skill when
54 
55- You are refactoring for design or performance
56- Tests are already passing and you need new requirements
57- You need a full architectural redesign
58 
59## Instructions
60 
611. Review failing tests and identify the smallest fix.
622. Implement the minimal change to pass the next test.
633. Run tests after each change to confirm progress.
644. Record shortcuts or debt for the refactor phase.
65 
66## Safety
67 
68- Avoid bypassing tests to make them pass.
69- Keep changes scoped to the failing behavior only.
70 
71## Resources
72 
73- `resources/implementation-playbook.md` for detailed patterns and examples.
74