# JOURNAL-parse

## 2026-06-15 — Phase start

Reading plan. Building recursive-descent parser with:
- Grammar: expr → term ((+|-) term)*; term → factor ((*|/) factor)*; factor → NUMBER | ( expr ) | - factor
- AST nodes: Num, BinOp, Unary
- ParseError exception

Plan: implement parser.py, test_parser.py, verify all D1–D6, then certify.