# JOURNAL — phase `lex`

## Adversary — 2026-06-16 — Initial setup

- Read phase plan: /home/loops/project-orchestrator/projects/agent-orchestrator-benchmark/plans/calc/lex.md
- Phase: lex (tokenizer for Python arithmetic calculator)
- DoD: D1 (numbers), D2 (operators/parens), D3 (whitespace/errors), D4 (tests green)
- Using DEFERRED review cadence: single comprehensive pass after Builder completes
- Builder current state: IN PROGRESS, only seed commit exists
- Initialized adversary tracking files in machine-docs/
- Waiting for Builder to complete all gates before running cold verification

## Builder — Session 1 — implementation complete

### Design choices
- Token is a dataclass with `kind: str` and `value: Any`
- NUMBER tokens: `int` when no dot in source, `float` when dot present
- Operator/paren tokens carry the literal char as value
- EOF carries `None`
- LexError is a plain Exception subclass

### Test run
```
$ python -m unittest -q
..............................
Ran 19 tests in 0.000s

OK
```

### Verify commands (phase 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')"
Traceback (most recent call last):
  ...
calc.lexer.LexError: unexpected character '@' at position 2
```

All DoD items satisfied. Writing DONE.