# google/uuid

Go package for UUIDs based on RFC 4122 and DCE 1.1: Authentication and Security Services.

Repository: https://github.com/google/uuid
Canonical: https://ross.abutalabs.com/products/google-uuid
Language: Go
License: BSD-3-Clause
License Family: permissive
Topics: go, uuid
Last push: 2024-11-14T17:05:06+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3855, "days_push": 657, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6142, forks 439 (observed 2026-08-28T04:09:36.483981+00:00)

## What it is
A Go package for generating and inspecting UUIDs based on RFC 9562 (formerly RFC 4122) and DCE 1.1. It represents UUIDs as 16-byte arrays and is the successor to github.com/pborman/uuid.

## Use cases
- generate unique identifiers in Go
- parse and validate UUID strings
- create version 4 random UUIDs
- inspect UUID versions and variants
- migrate from pborman/uuid

## When to choose
- you need standards-compliant UUID handling in a Go project
- you want a well-maintained, widely adopted UUID library

## When to avoid
- you need UUIDs in a non-Go language
- you require representation of invalid UUIDs

## Facets
- artifact type: library
- maturity: stable
- function: serialization, developer-tools
- domain: developer-tools
- platform: go, cross-platform
- tags: uuid, rfc-9562, identifiers, algorithms

## Member repositories
- google/uuid (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:36.483981+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:47:33.910947+00:00, confidence not recorded.
  - readme: https://github.com/google/uuid (fetched 2026-08-28T04:09:36.483981+00:00, sha b388eaa4f44d)
- Data as of 2026-08-30T08:39:29.467469+00:00.