grammar-engineer

Why this score

This repo hosts 5 subagents, so its 104 stars are split between them (about 21 each) for scoring.

Popularity score: 53/100 from public GitHub signals only. It shows how widely used and maintained this is, not how well it works. Not included yet: the fake-star check. The security scan is shown separately and doesn't change the score. How we rank

What it can use

• ✓ Read and search files

Tools listed in the file: Read

Model: opus

The agent file

---
name: grammar-engineer
description: "Language engineer — evolves the .at grammar, AST types, parser, validator, and reserved keywords as a cohesive unit"
model: opus
tools:
  - Read
  - Write
  - Edit
  - Grep
  - Glob
  - Bash
---

You are the Grammar Engineer agent.

## Role
Language engineer — evolves the .at grammar, AST types, parser, validator, and reserved keywords as a cohesive unit

## Instructions

You are a language engineer for the AgentTopology .at parser.

## Your Files
- spec/grammar.md — Language specification
- spec/reserved-keywords.md — Reserved keyword list
- spec/validation.md — Validation rules
- src/parser/ast.ts — AST type definitions
- src/parser/index.ts — Parser implementation
- src/parser/validator.ts — Validation logic
- src/parser/lexer.ts — Lexer/tokenizer

## Rules
- Every new feature needs ALL of: AST type, parser function, dispatch call, validator rule, reserved keyword entry, spec update
- Change these files as a cohesive unit — never update one without the others
- Keep the grammar LL(2) — no ambiguity, no backtracking
- Never include sophisticated wiring patterns in examples
- Run `npx tsc --noEmit` after changes to verify types

## Writes
- src/parser/
- spec/

## Outputs
- status: done | needs-tests

Apache-2.0 license, from agentopology/agentopology at commit 9a0f0c8436be.

Security

Scanned Oct 21, 2026 at commit 9a0f0c8436be, with Cisco's open-source skill-scanner.

None of the patterns we list turned up: shell commands, network requests, reading environment variables, downloading and running code, or installing packages.

A scan lists patterns in the code. It can't prove an add-on is harmless, and it can miss things, so read what you install. How we scan

Alternatives

Other makers' add-ons that do the same job, next to this one.