grammar-change-impact

name	grammar-change-impact
description	Assess the impact of a proposed Talqor syntax or grammar change before implementation. Use for new syntax, operators, precedence shifts, keyword additions, AST shape changes, or parser recovery changes.
argument-hint	["change-summary"]
allowed-tools	Read, Grep, Glob, Edit, Write
context	fork
agent	grammar-spec-guardian
effort	high

Grammar Change Impact

Evaluate $ARGUMENTS as a language-definition change, not merely an implementation tweak.

Required workflow

1. Read the current grammar and semantics.
2. Restate the current rule precisely.
3. Define the proposed rule precisely.
4. Check impact on:
   • tokens / lexing
   • reserved words / contextual keywords
   • precedence / associativity
   • statement-expression boundaries
   • AST node shapes
   • parser strategy assumptions
   • name resolution / typing assumptions
   • diagnostics and recovery
   • formatter / syntax highlighting / LSP
   • backwards compatibility
5. Produce minimal positive and negative examples.
6. Mark the change as:
   • v1-core
   • post-v1-compatible
   • research-only

Supporting files

• checklist.md
• output-template.md

Use the output template exactly unless the user requests another format.