artifacts: add calculators/ — the 30 built calculators (5/variant) + machine-docs + git logs

calculators/builder-adversary-lean/run-04/machine-docs/REVIEW-eval.md

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+# REVIEW — phase eval (Adversary)
+
+## Gates
+
+### eval/D1: PASS @2026-06-15T06:07Z
+
+Cold-verified all 5 plan cases:
+- `"2+3*4"` → 14 ✓
+- `"(2+3)*4"` → 20 ✓
+- `"8-3-2"` → 3 ✓
+- `"-2+5"` → 3 ✓
+- `"2*-3"` → -6 ✓
+
+`python -m unittest calc.test_evaluator.TestD1Arithmetic -v`: 5/5 ok.
+
+Break-it probes: `3+4+5`→12, `10-2*3`→4, `-(3+4)`→-7, `2*3+4*5`→26, `-(-5)`→5 — all correct.
+
+---
+
+### eval/D2: PASS @2026-06-15T06:07Z
+
+Cold-verified:
+- `"7/2"` → 3.5 (true division) ✓
+- `"1/0"` raises `EvalError("division by zero")`, NOT bare `ZeroDivisionError` ✓
+
+`python -m unittest calc.test_evaluator.TestD2Division -v`: 3/3 ok.
+
+Break-it probes: `0/0` raises EvalError ✓, `1/(2-2)` raises EvalError ✓.
+
+---
+
+### eval/D3: PASS @2026-06-15T06:07Z
+
+Cold-verified:
+- `format_result(2.0)` → `"2"` (no `.0`) ✓
+- `format_result(3.5)` → `"3.5"` ✓
+- `calc.py "4/2"` prints `2` ✓
+- `calc.py "7/2"` prints `3.5` ✓
+
+`python -m unittest calc.test_evaluator.TestD3ResultType -v`: 5/5 ok.
+
+Break-it probes: integers (`14`, `0`, `-6`), non-whole floats (`3.5`, `-3.5`), whole floats (`2.0`, `100.0`) — all formatted correctly.
+
+---
+
+### eval/D4: PASS @2026-06-15T06:08Z
+
+Cold-verified exact plan spot-checks:
+- `calc.py "2+3*4"` → stdout `14`, exit 0 ✓
+- `calc.py "(2+3)*4"` → stdout `20`, exit 0 ✓
+- `calc.py "7/2"` → stdout `3.5`, exit 0 ✓
+- `calc.py "4/2"` → stdout `2`, exit 0 ✓
+- `calc.py "1/0"` → stderr `error: division by zero`, exit 1 ✓
+- `calc.py "1 +"` → stderr `error: ...`, exit 1 ✓
+
+`python -m unittest calc.test_evaluator.TestD4CLI -v`: 6/6 ok.
+
+Break-it probes: no traceback on error ✓, error goes to stderr not stdout ✓, no-args exits 1 ✓.
+
+---
+
+### eval/D5: PASS @2026-06-15T06:08Z
+
+Cold-verified:
+- `python -m unittest -q`: **50 tests in 0.210s — OK** ✓
+- All 6 plan verification commands produce correct output / exit codes ✓
+- No regression in lex or parse suites (19 lex + 12 parse all still green) ✓
+- test_evaluator.py covers D1 (5 tests) + D2 (3 tests) + D3 (5 tests) + D4 (6 tests) = 19 evaluator tests ✓