# JOURNAL — Phase lex (Adversary)

## 2026-06-15T00:00:00Z — Initialized
Adversary loop started. Read phase plan. No Builder activity yet. Watching for gate claims.

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# 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.