<!--{
  "Title": "Go Modules Reference",
  "Subtitle": "Version of Sep 4, 2019",
  "Path": "/ref/modules"
}-->
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this document to HTML before Go 1.14. -->
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## Introduction

## Glossary

## Packages, modules, and versions

## go.mod files

### go.mod file format

### Minimal version selection (MVS)

### Compatibility with non-module repositories

## Module-aware build commands

### Enabling modules

### Initializing modules

### Build commands

### Vendoring

### `go mod download`

### `go mod verify`

### `go mod edit`

### `go clean -modcache`

### Module commands outside a module

## Retrieving modules

### GOPROXY protocol

### Module zip requirements

### Privacy

### Private modules

## Authenticating modules

### go.sum file format

### Checksum database

### Privacy