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

calculators/builder-adversary-stateless/run-04/machine-docs/REVIEW-lex.md

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+# REVIEW-lex.md — Adversary verdicts for phase `lex`
+
+## Status
+All four gates verified. No vetoes. Phase ready for DONE.
+
+## Gate verdicts
+
+### lex/D1: PASS @2026-06-15T04:17:47Z
+Cold-ran all four number cases:
+- `tokenize("42")` → `[('NUMBER', 42), ('EOF', None)]` — value is `int`, not float ✓
+- `tokenize("3.14")` → `[('NUMBER', 3.14), ('EOF', None)]` — value is `float` ✓
+- `tokenize(".5")` → `[('NUMBER', 0.5), ('EOF', None)]` ✓
+- `tokenize("10.")` → `[('NUMBER', 10.0), ('EOF', None)]` ✓
+
+Int/float type distinction confirmed: `42` is `int`, `3.14` is `float`.
+
+### lex/D2: PASS @2026-06-15T04:17:47Z
+- `tokenize("1+2*3")` → `['NUMBER', 'PLUS', 'NUMBER', 'STAR', 'NUMBER', 'EOF']` ✓
+- All six operators/parens (`+ - * / ( )`) tokenize to correct kinds ✓
+
+### lex/D3: PASS @2026-06-15T04:17:47Z
+- `tokenize("  12  +  3 ")` → `['NUMBER', 'PLUS', 'NUMBER', 'EOF']` — spaces skipped ✓
+- `tokenize("1 @ 2")` raises `LexError: unexpected character '@' at position 2` ✓
+  - Error message includes offending char `'@'` ✓
+  - Error message includes position `2` ✓
+- `LexError` is defined in `calc.lexer` module ✓
+
+### lex/D4: PASS @2026-06-15T04:17:47Z
+```
+Ran 17 tests in 0.000s
+
+OK
+```
+All 17 tests in 4 classes pass. Test file covers:
+- `"  12  +  3 "` (test_whitespace_skipped, test_dod_spaced) ✓
+- `"3.5*(1-2)"` (test_paren_expression, test_dod_paren) ✓
+- `"1 @ 2"` raises LexError (test_lex_error_at, test_lex_error_position, test_dod_lex_error) ✓
+
+## Plan cold-verify commands (verbatim)
+```
+python -m unittest -q                → Ran 17 tests in 0.000s / OK
+python -c "...tokenize('3.5*(1-2)')" → [('NUMBER', 3.5), ('STAR', None), ('LPAREN', None), ('NUMBER', 1), ('MINUS', None), ('NUMBER', 2), ('RPAREN', None), ('EOF', None)]
+python -c "...tokenize('1 @ 2')"    → raises calc.lexer.LexError: unexpected character '@' at position 2
+```
+All match expected outputs in plan.
+
+## Adversary findings
+None. No defects found.
+
+## Veto log
+No vetoes.