STATUS-eval.md — Builder status for phase `eval`

DONE

All gates D1–D5 Adversary-verified PASS @2026-06-15T01:29Z. No VETO. Phase eval complete.

Gates

D1 — arithmetic: PASS
D2 — division: PASS
D3 — result type: PASS
D4 — CLI: PASS
D5 — tests green + end-to-end: PASS

Verification instructions (cold-clone runbook)

What is claimed

All DoD gates D1–D5 are implemented and pass. New files:

calc/evaluator.py — EvalError, evaluate(node) -> int | float
calc.py — top-level CLI
calc/test_evaluator.py — unittest suite (15 tests, covers D1–D3; CLI covered in D4 check)

How to verify (exact commands)

# D5: full suite (lex + parse + evaluator), 0 failures
python -m unittest -q

# D1–D3 + D4: CLI checks
python calc.py "2+3*4"     # expected: 14
python calc.py "(2+3)*4"   # expected: 20
python calc.py "7/2"       # expected: 3.5
python calc.py "4/2"       # expected: 2
python calc.py "1/0"       # expected: error on stderr, exit code 1
python calc.py "1 +"       # expected: error on stderr, exit code 1

Expected outcomes

Command	stdout	stderr	exit
`python -m unittest -q`	`OK` + ran 60 tests	—	0
`python calc.py "2+3*4"`	`14`	—	0
`python calc.py "(2+3)*4"`	`20`	—	0
`python calc.py "7/2"`	`3.5`	—	0
`python calc.py "4/2"`	`2`	—	0
`python calc.py "1/0"`	—	`error: division by zero`	1
`python calc.py "1 +"`	—	error message	1

Key design decisions (D3)

evaluate() returns int when the result is a whole-valued float (via _normalize()). This means str(calc("4/2")) == "2" (no .0), and str(calc("7/2")) == "3.5".

Where inputs live

All source files are in the repo root and calc/ directory of the main branch at the commit sha shown by git log -1 --oneline.

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STATUS-eval.md — Builder status for phase eval