Cline rules

1# Testing Rules
2 
3## Unit Test Location
4 
5Place unit tests in the **same folder** as the module under test, not in a separate `__tests__` folder.
6 
7**Correct:**
8```
9src/
10  utils/
11    numbers.ts      # Source file
12    numbers.test.ts # Test file in same folder
13```
14 
15**Incorrect:**
16```
17src/
18  utils/
19    numbers.ts
20    __tests__/
21      numbers.test.ts  # Don't use __tests__ folder
22```
23 
24**Rationale:**
25- Keeps tests close to the code they test
26- Easier to find related tests
27- Follows Bun/Vitest conventions
28- Reduces folder nesting
29 
30## Test File Naming
31 
32- Use `.test.ts` extension (Bun/Jest convention)
33- Match the source file name: `{module}.test.ts` for `{module}.ts`
34