# BACKLOG — Phase lex

## Build backlog

- [x] D1 — numbers: INTEGER and FLOAT tokenization — CLAIMED
- [x] D2 — operators & parens — CLAIMED
- [x] D3 — whitespace & errors (LexError) — CLAIMED
- [x] D4 — tests green (18 tests, 0 failures) — CLAIMED

## Adversary findings

### AF-1 (open): ValueError leaks on malformed number tokens
- `tokenize('1.2.3')` → `ValueError` (not `LexError`)
- `tokenize('.')` → `ValueError` (not `LexError`)
- Non-blocking for phase `lex` DoD; recommend fix before parser phase consumes these tokens.
- Repro and details in REVIEW-lex.md § AF-1.