---
name: shell-grammar-change
description: Shell tokenizer/parser — grammar-first, fixtures, shell roadmap docs.
tags: [shell, grammar, posix]
requires: [read_man_page, verification_hints]
---

# shell-grammar-change

Read developer-guide/18-how-to-add-shell-grammar-feature.md. Update docs/reference/shell-grammar.md, shell-unsupported-behavior.md, shell-troubleshooting.md when semantics change. Run test:shell-fast and verify:shell-roadmap when applicable.