hydro-dev/Hydro
Hydro - Next generation high performance online-judge platform - 新一代高效强大的信息学在线测评系统 (a.k.a. vj5) observed · 2026-08-28
Health v2 · maintenance only
67/100
- Activity 99
- Release rhythm 8
- Longevity 100
Flags: prerelease_only
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 2345
- days_rel: 507
- days_push: 8
- n_releases_24m: 1
Adoption not part of the score
6891 stars · 470 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Hydro is a high-performance, self-hostable online judge platform for competitive programming and informatics education, built in TypeScript on Node.js with MongoDB. It features a modular plugin system, multi-domain workspaces, fine-grained permissions, support for many contest formats and problem types, and built-in VJudge-style problem importing from other OJ platforms.
Use cases
- host a competitive programming online judge for a school or university
- run ACM/ICPC, OI, or IOI style contests with automatic code judging
- set up homework and practice problem sets for programming classes
- import problems from Codeforces, Luogu, or HUSTOJ into a private judge
- self-host a scalable judge that runs on a Raspberry Pi or ARM server
- manage multiple classes or institutions in one judge instance with isolated domains
When to choose
- you need a full-featured, actively maintained online judge with contest, homework, and rich problem-type support
- you want horizontal scalability with stateless nodes and auto-balanced judging queues
- you need extensible functionality via a plugin system and smooth upgrades
- you want one-click install on Linux including ARM devices
When to avoid
- you only need a tiny single-user code runner or sandbox without a web platform
- your infrastructure is Windows-only, since Hydro targets Linux
- you require a judge in a language other than the supported C++/Java/Python set without extra setup
- you cannot run MongoDB or prefer a fully managed SaaS without self-hosting
Facets
application · maturity active
web-framework plugin-system api-framework education developer-tools web-development self-hosted self-hosted online-judge competitive-programming code-evaluation acm-icpc oi mongodb typescript contest-management vjudge problem-bank sandbox linux nodejs docker web-server
2 sources
- readme: https://github.com/hydro-dev/Hydro · fetched 2026-08-28 · c9314fc6dc9e
- homepage: https://hydro.js.org/ · fetched 2026-08-29 · 44136fa355b3
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| hydro-dev/Hydro | main | 67 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem