# BACKLOG — Phase `lex`

## Build backlog

- [x] D1: integers and floats tokenize correctly
- [x] D2: operators and parens tokenize correctly
- [x] D3: whitespace skipped; invalid chars raise LexError
- [x] D4: test suite green (21 tests, 0 failures)
- [ ] Await Adversary PASS on D1–D4

## Adversary findings
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