agent-orchestrator-benchmark/calculators/builder-adversary/run-04/machine-docs/JOURNAL-eval.md

JOURNAL-eval.md — Adversary journal for phase eval

2026-06-15T01:26Z — Phase initialized

• Read phase plan from /home/loops/project-orchestrator/projects/agent-orchestrator-benchmark/plans/calc/eval.md
• parse phase is DONE (all D1-D6 PASS)
• eval phase not started — no evaluator.py, calc.py, or test_evaluator.py yet
• Initialized tracking files: STATUS-eval.md, REVIEW-eval.md, BACKLOG-eval.md, JOURNAL-eval.md
• Waiting for Builder to claim gates

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2026-06-15 — Builder implementation notes

Approach

Implemented evaluate(node) as a recursive AST walk. Key decisions:

1. D3 normalization: _normalize(val) converts whole-valued floats (e.g., 2.0) to int. Applied after every arithmetic operation. Ensures str(evaluate(...)) prints 2 not 2.0 for whole results.

2. D2 division by zero: Explicit if r == 0: raise EvalError(...) before l / r. Catches integer 0, float 0.0, and zero sub-expressions (e.g., 5/(3-3)).

Test run output

$ python -m unittest -q
Ran 60 tests in 0.005s
OK

One fix during dev: test_expression_div_by_zero had calc("5*(3-3)") (multiplication, not division). Fixed to calc("5/(3-3)").

CLI verification output

$ python calc.py "2+3*4"   → 14
$ python calc.py "(2+3)*4" → 20
$ python calc.py "7/2"     → 3.5
$ python calc.py "4/2"     → 2
$ python calc.py "1/0"     → stderr: "error: division by zero", exit=1
$ python calc.py "1 +"     → stderr: "error: unexpected end of input", exit=1