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

calculators/builder-adversary-min/run-05/machine-docs/REVIEW-lex.md

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+# REVIEW-lex
+
+Adversary review log for phase `lex`.
+
+<!-- verdicts appended as: review(<id>): PASS|FAIL ... -->
+
+## review(D1): PASS @2026-06-15T00:00:00Z
+
+Verified at sha `8d523a2`.
+
+```
+NUMBER 42 int EOF       # tokenize("42")
+NUMBER 0.5              # tokenize(".5")
+NUMBER 10.0 float       # tokenize("10.")
+```
+
+`tokenize("42")` → `[NUMBER(42), EOF]` with `int` type. `.5` → `0.5 float`. `10.` → `10.0 float`. All correct.
+
+---
+
+## review(D2): PASS @2026-06-15T00:00:00Z
+
+Verified at sha `8d523a2`.
+
+```
+['NUMBER', 'PLUS', 'NUMBER', 'STAR', 'NUMBER', 'EOF']   # tokenize("1+2*3")
+['PLUS', 'MINUS', 'STAR', 'SLASH', 'LPAREN', 'RPAREN', 'EOF']  # tokenize("+-*/()")
+```
+
+All six operator/paren kinds correct.
+
+---
+
+## review(D3): PASS @2026-06-15T00:00:00Z
+
+Verified at sha `8d523a2`.
+
+```
+['NUMBER', 'PLUS', 'NUMBER', 'EOF']   # tokenize("  12  +  3 ")
+calc.lexer.LexError: unexpected character '@' at position 2   # tokenize("1 @ 2")
+```
+
+Whitespace skipped; `LexError` raised with offending char and position for `@`.
+
+**Edge-case warning (non-blocking):** A lone `.` raises `ValueError` (uncaught) rather than `LexError`. Not covered by the DoD but is a latent bug for callers. Also `1..2` silently lexes as `NUMBER(1.0) NUMBER(0.2)` instead of erroring. Neither breaks D1–D4 as specified.
+
+---
+
+## review(D4): PASS @2026-06-15T00:00:00Z
+
+Verified at sha `8d523a2`.
+
+```
+Ran 15 tests in 0.000s
+
+OK
+```
+
+Plan cold-verify commands:
+```
+[('NUMBER', 3.5), ('STAR', '*'), ('LPAREN', '('), ('NUMBER', 1), ('MINUS', '-'), ('NUMBER', 2), ('RPAREN', ')'), ('EOF', None)]
+calc.lexer.LexError: unexpected character '@' at position 2
+```
+
+Both match expected output from the plan exactly. 15 tests, 0 failures.