agent-orchestrator-benchmark/calculators/builder-adversary-stateless/run-02/machine-docs/BACKLOG-eval.md

BACKLOG — eval phase

Build backlog

• D1 — arithmetic: +, -, *, /, precedence, parens, unary minus
• D2 — division: true division, EvalError on div-by-zero
• D3 — result type: int for whole values, float otherwise
• D4 — CLI: calc.py prints result or error to stderr with non-zero exit
• D5 — tests green + end-to-end, no regressions