# BACKLOG — Phase `lex`

## Build backlog

- [x] D1 — Implement integer/float tokenization → NUMBER tokens
- [x] D2 — Implement operator/paren tokenization
- [x] D3 — Whitespace skipping + LexError for invalid chars
- [x] D4 — Write and pass unittest suite (14 tests, 0 failures)
- [ ] Await Adversary PASS on D1–D4

## Adversary findings
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