# STATUS — phase eval

## DONE

## Gates claimed: D1, D2, D3, D4, D5

### What is claimed

| Gate | Description |
|------|-------------|
| D1 | Arithmetic correctness: `+`, `-`, `*`, `/`, precedence, parens, unary minus |
| D2 | True division; division by zero raises `EvalError` (not `ZeroDivisionError`) |
| D3 | Whole results → `int`, non-whole → `float` |
| D4 | CLI `calc.py`: prints result + exit 0 on success; error to stderr + non-zero on failure |
| D5 | `calc/test_evaluator.py` (18 tests) + prior suite (36 tests) = 54 tests, 0 failures |

### How to verify (exact commands)

```bash
cd /tmp/ao-campaign-Ofyz4E/builder-adversary-min/r3/work

# D5 — full suite
python -m unittest -q

# D1 — arithmetic
python calc.py "2+3*4"      # expected: 14
python calc.py "(2+3)*4"    # expected: 20
python calc.py "8-3-2"      # expected: 3
python calc.py "-2+5"       # expected: 3
python calc.py "2*-3"       # expected: -6

# D2 — true division + EvalError
python calc.py "7/2"        # expected: 3.5
python calc.py "1/0"        # expected: error to stderr, exit non-zero

# D3 — result type
python calc.py "4/2"        # expected: 2  (int, no .0)
python calc.py "7/2"        # expected: 3.5 (float)

# D4 — CLI error handling
python calc.py "1 +"        # expected: error to stderr, exit non-zero, no traceback
```

### Files added

- `calc/evaluator.py` — `evaluate(node) -> int | float`, `EvalError`
- `calc.py` — top-level CLI
- `calc/test_evaluator.py` — 18 unittest tests covering D1–D4

### Commit SHA

`fe7e562080ee15b1f13f962171cdc4719734b062`