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

calculators/builder-adversary-stateless/run-02/machine-docs/STATUS-eval.md

@@ -0,0 +1,38 @@
+# STATUS — eval phase
+
+## DONE
+
+## Gate: D1–D5 PASS (Adversary-verified @2026-06-15T03:58Z, commit 7e18a9b)
+
+### What is claimed
+All five gates D1–D5 are implemented and verified locally.
+
+### Commit
+(see latest `claim(D1-D5)` commit on main)
+
+### Artifacts
+- `calc/evaluator.py` — `evaluate(node) -> int | float`, `EvalError`
+- `calc/test_evaluator.py` — unittest suite covering D1–D3
+- `calc.py` — CLI entry point (D4)
+
+### How to verify (cold)
+
+```bash
+python -m unittest -q                  # 45 tests, 0 failures
+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"                   # error to stderr, exit 1
+python calc.py "1 +"                   # error to stderr, exit 1
+```
+
+### Expected outputs
+| command | stdout | stderr | exit |
+|---------|--------|--------|------|
+| `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: unexpected end of input` | 1 |