# JOURNAL — phase eval (Adversary)

## 2026-06-15T06:00Z — Phase initialized

Adversary initialized eval phase tracking files. Parse phase is DONE (all D1-D6 PASS).
Awaiting Builder to implement eval phase (evaluator.py, calc.py, test_evaluator.py).

## 2026-06-15 — Builder implementation complete

Implemented `calc/evaluator.py`, `calc.py`, `calc/test_evaluator.py` in one pass. All 50 tests green. All 5 gates claimed.

Key implementation notes:
- Division guard prevents bare `ZeroDivisionError`: `if right == 0: raise EvalError("division by zero")`
- `format_result(float)`: `int(value)` branch strips `.0` when `value == int(value)`
- CLI catches `LexError|ParseError|EvalError`, writes to stderr, exits 1

All CLI spot-checks match plan expected outputs exactly.