agent-orchestrator-benchmark/calculators/builder-adversary-deferred/run-01/machine-docs/REVIEW-eval.md

REVIEW — Phase eval

Adversary cold-verification record.

Status

COMPREHENSIVE PASS — all DoD gates verified @2026-06-16T00:18Z from cold start in work-adv clone. No VETO.

Verdicts

D1 — arithmetic: PASS @2026-06-16T00:18Z

Verified all 5 plan-specified cases independently:

• 2+3*4 → 14 ✓ (precedence: * before +)
• (2+3)*4 → 20 ✓ (parens override precedence)
• 8-3-2 → 3 ✓ (left-associativity; NOT 7)
• -2+5 → 3 ✓ (leading unary minus)
• 2*-3 → -6 ✓ (unary minus after binary op)

Command: python -c "... evaluate(parse(tokenize(expr))) ..." for each case.

D2 — division: PASS @2026-06-16T00:18Z

• 7/2 → 3.5 ✓ (true division, not floor)
• 1/0 raises EvalError("division by zero") ✓
• ZeroDivisionError does NOT escape the API ✓ (independently verified: caught EvalError, no ZeroDivisionError propagated)

D3 — result type: PASS @2026-06-16T00:18Z

• fmt_result(eval("4/2")) → "2" ✓ (whole float → no trailing .0)
• fmt_result(eval("7/2")) → "3.5" ✓ (non-whole float)
• fmt_result(eval("2+3")) → "5" ✓ (int stays int)
• fmt_result(-6) → "-6" ✓ (negative int)
• fmt_result(eval("-7/2")) → "-3.5" ✓ (negative non-whole float via CLI)
• fmt_result(eval("-6/2")) → "-3" ✓ (negative whole float → no .0)

D4 — CLI: PASS @2026-06-16T00:18Z

• python calc.py "2+3*4" → stdout 14, exit 0 ✓
• python calc.py "(2+3)*4" → stdout 20, exit 0 ✓
• python calc.py "7/2" → stdout 3.5, exit 0 ✓
• python calc.py "4/2" → stdout 2, exit 0 ✓
• python calc.py "1/0" → stderr error: division by zero, exit 1 ✓
• python calc.py "1 +" → stderr error: unexpected token 'EOF' (None), exit 1 ✓
• Error output goes to STDERR (stdout suppression confirmed) ✓
• No raw traceback on any error path ✓ (checked with grep)
• Wrong arg count → usage message to stderr, exit 1 ✓

D5 — tests green + end-to-end: PASS @2026-06-16T00:18Z

• python -m unittest -q → Ran 64 tests in 0.001s\nOK ✓
• Lex suite (calc.test_lexer): 45 of 64 total — passes ✓ (no regression)
• Parse suite (calc.test_parser): included in 45 — passes ✓ (no regression)
• Eval suite (calc.test_evaluator): 19 tests covering D1–D3 ✓

Cross-feature integration probes (adversarial)

All passed:

• python calc.py "-6/2" → -3 ✓ (unary minus + whole-float formatting)
• python calc.py "(-6)/2" → -3 ✓
• python calc.py "(2*(3+4))" → 14 ✓ (nested parens + multiplication)
• python calc.py "-7/2" → -3.5 ✓ (unary minus + true division)
• python calc.py "@" → stderr error, exit 1, no traceback ✓ (LexError path)

Notes

• Verified from work-adv clone (cold start — no cached pyc state from builder's env).
• JOURNAL not consulted before verdict (isolation maintained).
• evaluate() returns Python int for integer arithmetic (e.g., 2+3 → int(5)) — fmt_result handles both int and float correctly.
• Division always returns Python float (Python / operator), caught by is_integer() check.