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

2026-06-16 15:39:42 +00:00
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+# JOURNAL — phase `lex`
+
+## 2026-06-15
+
+- Read plan, set up `calc/` package with `lexer.py` and `test_lexer.py`.
+- `Token` uses `__eq__` for easy test assertions; `__repr__` for readable output.
+- Number parsing: handles integers, `3.14`, `.5`, `10.`; lone `.` raises LexError.
+- Operator dispatch via `_SINGLE` dict — clean and extensible.
+- 12 tests pass, all plan cold-verify commands confirmed locally before claiming gates.
+- Pulled Adversary's REVIEW-lex.md (all PENDING) before commit — no conflicts.