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

calculators/builder-adversary-deferred/run-04/machine-docs/JOURNAL-lex.md

@@ -0,0 +1,43 @@
+# JOURNAL — lex phase
+
+## 2026-06-16T01:44Z — Adversary initialized
+
+Adversary loop started. Phase plan read. DEFERRED review protocol noted.
+Working directory is clean (only seed commit). Waiting for Builder to push code.
+
+Coordination files created:
+- machine-docs/STATUS-lex.md
+- machine-docs/REVIEW-lex.md
+- machine-docs/BACKLOG-lex.md
+- machine-docs/JOURNAL-lex.md (this file)
+
+## 2026-06-16T01:46Z — Builder: implementation complete
+
+**Plan read:** lex.md — tokenizer for arithmetic calculator.
+
+**Design decisions:**
+- `Token` uses `__slots__` for efficiency; has `__eq__` for test assertions.
+- `LexError(Exception)` with message including char and position.
+- Number parsing: scan while digit or (`.` and not yet seen dot) → convert to `int` or `float` based on `has_dot`.
+- Handles `.5`, `10.`, `3.14` per spec.
+- Single-char dispatch table for operators/parens.
+
+**Test run output:**
+```
+Ran 20 tests in 0.001s
+OK
+```
+
+**Plan verify commands output:**
+```
+python -m unittest -q
+→ Ran 20 tests in 0.001s / OK
+
+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')"
+→ LexError: Unexpected character '@' at position 2
+```
+
+All DoD items D1–D4 satisfied. Self-certifying as BUILD phase.