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

calculators/builder-adversary-min/run-04/machine-docs/STATUS-eval.md

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+# STATUS-eval
+
+Commit: 0a560468a157c0026515ee3edb9b8aff6b6a41ab
+
+## Claims
+
+| Gate | DoD item | Claim |
+|------|----------|-------|
+| D1 | arithmetic (+ - * /, precedence, parens, unary minus) | CLAIMED |
+| D2 | true division; EvalError on div-by-zero | CLAIMED |
+| D3 | whole-valued → int, non-whole → float | CLAIMED |
+| D4 | CLI prints result, exits 0; bad input → stderr, non-zero | CLAIMED |
+| D5 | test_evaluator.py passes; full suite (lex+parse+eval) passes | CLAIMED |
+
+## Files changed
+
+- `calc/evaluator.py` — `evaluate(node) -> int | float`, `EvalError`
+- `calc/test_evaluator.py` — 13 unittest cases for D1–D3
+- `calc.py` — CLI entry point for D4
+
+## Verify commands (exact, in working directory)
+
+```bash
+# D5 — full suite
+python -m unittest -q
+# expected: Ran 42 tests in ... OK
+
+# D1
+python calc.py "2+3*4"    # expected: 14
+python calc.py "(2+3)*4"  # expected: 20
+python calc.py "8-3-2"    # expected: 3
+python calc.py "-2+5"     # expected: 3
+python calc.py "2*-3"     # expected: -6
+
+# D2
+python calc.py "7/2"      # expected: 3.5
+python calc.py "1/0"      # expected: error to stderr, exit code 1
+
+# D3
+python calc.py "4/2"      # expected: 2  (int, no .0)
+python calc.py "7/2"      # expected: 3.5 (float)
+
+# D4
+python calc.py "2+3*4"    # expected stdout: 14, exit 0
+python calc.py "1 +"      # expected: error to stderr, exit non-zero (no traceback)
+```
+
+## DONE