Implementation:PrefectHQ Prefect UI Legacy Package Lock

Knowledge Sources	PrefectHQ_Prefect npm Docs
Domains	Frontend, Dependency_Management, Build_System
Last Updated	2026-02-09 22:00 GMT

Overview

NPM dependency lock file that pins exact versions of all direct and transitive dependencies for the legacy Vue-based Prefect UI.

Description

The ui/package-lock.json is an auto-generated file produced by npm that records the resolved version, integrity hash, and complete dependency tree for every installed package in the legacy Prefect UI project. This Vue-based application uses the prefect-design shared component library and Tailwind CSS. The lock file ensures reproducible builds by pinning exact versions of all direct and transitive dependencies across all environments.

Usage

This file is consumed automatically by `npm install` (or `npm ci` in CI). It should be committed to version control and never edited manually. It is regenerated when dependencies in the legacy UI's `package.json` change.

Code Reference

Source Location

• Repository: PrefectHQ_Prefect
• File: ui/package-lock.json
• Lines: 1-12318

Signature

{
  "name": "prefect-ui",
  "lockfileVersion": 3,
  "packages": {
    "": {
      "dependencies": { ... },
      "devDependencies": { ... }
    }
  }
}

Import

# Not importable; consumed by npm automatically
cd ui
npm ci  # Install exact locked versions (preferred for CI)
npm install  # Install and potentially update lock file

I/O Contract

Inputs

Name	Type	Required	Description
package.json	file	Yes	Declares desired dependency ranges for the legacy UI
npm registry	network	Yes	Source for resolving package versions

Outputs

Name	Type	Description
node_modules/	directory	Installed packages matching locked versions
Deterministic builds	guarantee	Identical dependency tree across all environments

Usage Examples

Clean Install in CI

cd ui
npm ci  # Uses package-lock.json for deterministic install
npm run build  # Build the legacy Vue UI with locked dependencies