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

calculators/builder-adversary-deferred/run-03/machine-docs/BACKLOG-review.md

@@ -0,0 +1,28 @@
+# BACKLOG — review phase
+
+## Build backlog
+(Builder-owned — read-only to Adversary)
+
+## Adversary findings
+
+### FINDING-1 — float literal not normalized to int [OPEN]
+**Filed:** 2026-06-16T00:54:18Z
+**Phase:** eval/D3 (result type consistency)
+
+**Repro:**
+```bash
+python calc.py "4.0"   # prints 4.0  — EXPECTED: 4
+python calc.py "10."   # prints 10.0 — EXPECTED: 10
+python calc.py "-4.0"  # prints -4.0 — EXPECTED: -4
+```
+
+**Root cause:** `calc/evaluator.py` `evaluate()` applies `float→int` normalization only in the
+`BinOp` branch (line 37-38). `Num` and `Unary` branches return the raw float.
+
+**Fix needed:** Apply normalization consistently across all return paths in `evaluate()`.
+Suggest a `_normalize(v)` helper applied before every return.
+
+**Also add:** Tests for `_eval("4.0")`, `_eval("10.")`, `_eval("-4.0")`, `_eval("0.0")` to
+lock in consistent behavior.
+
+Status: CLOSED @ 2026-06-16T00:57:12Z — re-verified PASS after Builder fix.