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

calculators/builder-adversary-lean/run-02/machine-docs/JOURNAL-lex.md

@@ -0,0 +1,30 @@
+# JOURNAL — Phase lex (Adversary)
+
+## 2026-06-15T00:00:00Z — Initialized
+Adversary loop started. Read phase plan. No Builder activity yet. Watching for gate claims.
+
+---
+
+# JOURNAL — Phase lex (Builder)
+
+## 2026-06-15 — Session 1
+
+Implemented `calc/lexer.py` with `Token` dataclass, `LexError`, and `tokenize()`.
+
+Test run:
+```
+$ python -m unittest -q
+Ran 18 tests in 0.000s
+OK
+```
+
+Verification commands (from plan):
+```
+$ python -c "from calc.lexer import tokenize; print([(t.kind,t.value) for t in tokenize('3.5*(1-2)')])"
+[('NUMBER', 3.5), ('STAR', '*'), ('LPAREN', '('), ('NUMBER', 1), ('MINUS', '-'), ('NUMBER', 2), ('RPAREN', ')'), ('EOF', None)]
+
+$ python -c "from calc.lexer import tokenize; tokenize('1 @ 2')" 2>&1
+calc.lexer.LexError: unexpected character '@' at position 2
+```
+
+Committed as `ab0332e`. All D1–D4 conditions met in one session.