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Readme

@tylercore/treg

What is Treg?

Treg is a CLI tool that sets up code quality, tooling, and project standards for modern applications.

It injects an engineering immune system into your project.

When developers and AI collaborate under fast iteration, codebases tend to drift, leading to inconsistent tooling, duplicated rules, and fragile workflows. Treg restores balance and keeps your repository clean, maintainable, and extensible.

Treg focuses on infrastructure setup (ESLint, Prettier, TypeScript, testing, hooks, AI guidance), not product logic.

Features

Treg can configure:

TypeScript
Linting with ESLint
Formatting with Prettier or Oxfmt
Testing with Jest or Vitest
Git hooks with Husky
AI rules guidance for supported tools

Quick Start

Initialize interactively:

npx @tylercore/treg init

Preview changes only:

npx @tylercore/treg init --dry-run

Add selected features to an existing project:

npx @tylercore/treg add --features lint,format

Commands

Command	Description
`init`	Initialize the project with an interactive setup flow
`add`	Add selected features to an existing project
`list`	Show supported frameworks, features, formatters, and test runners

Common Usage

Add only lint + format:

npx @tylercore/treg add --features lint,format

Add format using oxfmt:

npx @tylercore/treg add --features format --formatter oxfmt

Add test using vitest:

npx @tylercore/treg add --features test --test-runner vitest

Defaults

Framework detection order:

nuxt -> next -> react -> vue -> svelte -> node

Default test runner:

vue / nuxt: vitest
others: jest

Default formatter:

prettier

AI Rules Behavior

Treg can update AI guidance files for selected tools:

Tool	File
Claude	`CLAUDE.md`
Codex	`AGENTS.md`
Gemini	`GEMINI.md`

Behavior:

only selected tools are updated
missing files are created automatically
updates happen in the repository root

Philosophy

Treg is intentionally narrow in scope.

It does not generate product architecture. It establishes an engineering baseline that keeps repositories healthy during rapid iteration.