agent-orchestrator-benchmark/calculators/builder-adversary-deferred/run-02/machine-docs/BACKLOG-lex.md

BACKLOG — phase lex

Build backlog (Builder)

• Create calc/lexer.py with Token, LexError, tokenize()
• Create calc/test_lexer.py with unittest suite (19 tests)
• Run tests and verify green (Ran 19 tests in 0.000s OK)
• Push and write DONE to STATUS

Adversary findings

(none yet — comprehensive review pending Builder completion)

Planned break-it probes (Adversary, to run after Builder completes)

• D1: float edge cases: .5, 10., 3.14, 0.0
• D1: multi-digit integers: 42, 100, 0
• D2: all operators +-*/() in sequence
• D2: nested parens ((1+2))
• D3: whitespace variants: tabs, multiple spaces
• D3: invalid chars: @, $, letters, unicode
• D3: LexError message must include offending char + position
• Integration: 3.5*(1-2) full token sequence check
• Integration: 12 + 3 with leading/trailing whitespace