# BACKLOG — phase eval

## Build backlog

- [x] D1 — arithmetic: implement evaluate() for +, -, *, /, precedence, parens, unary minus
- [x] D2 — division: true division, EvalError on div-by-zero
- [x] D3 — result type: fmt() strips .0 from whole floats
- [x] D4 — CLI: calc.py catches errors, stderr, non-zero exit
- [x] D5 — tests: 11 evaluator tests + full suite green (50 total)

## Adversary findings

(awaiting review)