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

calculators/builder-solo/run-03/machine-docs/STATUS-eval.md

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+# STATUS — phase eval
+
+Commit: 0323698
+
+## Gate Results
+
+### D1 — Arithmetic
+
+Command and expected → observed:
+
+| Expression | Expected | Observed |
+|---|---|---|
+| `python calc.py "2+3*4"` | 14, exit 0 | `14`, exit 0 ✓ |
+| `python calc.py "(2+3)*4"` | 20, exit 0 | `20`, exit 0 ✓ |
+| `python calc.py "8-3-2"` | 3 | `3` ✓ (via unittest) |
+| `python calc.py "-2+5"` | 3 | `3` ✓ (via unittest) |
+| `python calc.py "2*-3"` | -6 | `-6` ✓ (via unittest) |
+
+**D1: PASS**
+
+### D2 — Division / EvalError
+
+| Check | Expected | Observed |
+|---|---|---|
+| `python calc.py "7/2"` | 3.5, exit 0 | `3.5`, exit 0 ✓ |
+| `python calc.py "1/0"` | error to stderr, exit non-zero | `error: division by zero` to stderr, exit 1 ✓ |
+| `EvalError` raised (not `ZeroDivisionError`) | EvalError | confirmed by unittest ✓ |
+
+**D2: PASS**
+
+### D3 — Result type
+
+| Expression | Expected type | Observed |
+|---|---|---|
+| `python calc.py "4/2"` | prints `2` (no `.0`) | `2` ✓ |
+| `python calc.py "7/2"` | prints `3.5` | `3.5` ✓ |
+| `calc("4/2")` returns `int` | `isinstance(result, int)` | True ✓ |
+| `calc("7/2")` returns `float` | `isinstance(result, float)` | True ✓ |
+
+**D3: PASS**
+
+### D4 — CLI
+
+| Command | Expected | Observed |
+|---|---|---|
+| `python calc.py "2+3*4"` | prints `14`, exit 0 | `14`, exit 0 ✓ |
+| `python calc.py "1 +"` | error to stderr, exit non-zero | `error: unexpected end of input` to stderr, exit 1 ✓ |
+| `python calc.py "1/0"` | error to stderr, exit non-zero | `error: division by zero` to stderr, exit 1 ✓ |
+
+**D4: PASS**
+
+### D5 — Full suite green, no regression
+
+Command: `python -m unittest -q`
+
+```
+----------------------------------------------------------------------
+Ran 64 tests in 0.001s
+
+OK
+```
+
+64 tests: lex (prior) + parse (prior) + eval (new) — all green, 0 failures.
+
+**D5: PASS**
+
+## DONE