{"adoption": {"forks": 451, "observed_at": "2026-08-28T04:03:54.322345+00:00", "stars": 1182}, "canonical_url": "https://ross.abutalabs.com/products/online-judge", "card": {"archived": false, "artifact_type": "application", "description": "A modern open-source online judge and contest platform system.", "domain": ["education", "web-development", "programming-languages", "self-hosted", "gaming-tools"], "enriched": true, "function": ["web-framework", "api-framework", "auth", "authorization", "search-engine", "data-visualization", "documentation", "markdown", "pdf", "email", "developer-tools"], "health_score": 80, "homepage": "https://dmoj.ca", "language": "Python", "license": "AGPL-3.0", "license_family": "copyleft", "maturity": "active", "member_repos": ["DMOJ/online-judge"], "name": "DMOJ/online-judge", "platform": ["python", "self-hosted"], "pushed_at": "2026-08-25T00:49:46+00:00", "repo": "DMOJ/online-judge", "stars": 1182, "tags": ["online-judge", "competitive-programming", "contests", "code-grading", "judge-server", "django", "rating-system", "plagiarism-detection", "algorithms", "web-server", "docker", "linux"], "topics": ["python", "dmoj", "dmoj-judge", "programming-contests", "programming-challenge", "coding-interviews", "coding-competitions", "online-judge"], "urls": [], "use_cases": ["host a competitive programming contest", "run a coding practice site for students", "set up a self-hosted online judge", "grade programming submissions automatically", "organize national olympiad informatics competitions", "track coder ratings with Elo-style ranking", "create programming problems with LaTeX statements"], "what_it_is": "DMOJ is a modern open-source online judge and contest platform for hosting programming competitions and practice problems. It supports sandboxed judging in over 60 language runtimes, multiple contest formats, Elo-style rating, and rich problem statements with LaTeX and PDF export.", "when_to_avoid": ["you only need a simple quiz or multiple-choice assessment tool", "you want a lightweight single-page coding playground without user accounts", "you cannot operate the separate judge-server component and its sandboxing requirements", "you need a commercial turnkey product with vendor support"], "when_to_choose": ["you need a battle-tested judge that has hosted national olympiads", "you want support for interactive and signature-graded tasks", "you need many contest formats like ICPC, IOI, or AtCoder out of the box", "you require judging in dozens of programming languages with per-language limits"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/online-judge", "repo": "DMOJ/online-judge", "role": "main", "score": 67}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:03:54.322345+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T06:24:45.496375+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e1e99a9386516cab50ab9dcdcb69cfbe39cf97bf223e64e6b863d718596bf765", "fetched_at": "2026-08-28T04:03:54.322345+00:00", "kind": "readme", "missing": false, "url": "https://github.com/DMOJ/online-judge"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:03:54.322345+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T06:24:45.496375+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e1e99a9386516cab50ab9dcdcb69cfbe39cf97bf223e64e6b863d718596bf765", "fetched_at": "2026-08-28T04:03:54.322345+00:00", "kind": "readme", "missing": false, "url": "https://github.com/DMOJ/online-judge"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T06:24:45.496375+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e1e99a9386516cab50ab9dcdcb69cfbe39cf97bf223e64e6b863d718596bf765", "fetched_at": "2026-08-28T04:03:54.322345+00:00", "kind": "readme", "missing": false, "url": "https://github.com/DMOJ/online-judge"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:03:54.322345+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:03:54.322345+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:03:54.322345+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T06:24:45.496375+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e1e99a9386516cab50ab9dcdcb69cfbe39cf97bf223e64e6b863d718596bf765", "fetched_at": "2026-08-28T04:03:54.322345+00:00", "kind": "readme", "missing": false, "url": "https://github.com/DMOJ/online-judge"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:03:54.322345+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:03:54.322345+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T06:24:45.496375+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e1e99a9386516cab50ab9dcdcb69cfbe39cf97bf223e64e6b863d718596bf765", "fetched_at": "2026-08-28T04:03:54.322345+00:00", "kind": "readme", "missing": false, "url": "https://github.com/DMOJ/online-judge"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:03:54.322345+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:03:54.322345+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:03:54.322345+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T06:24:45.496375+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e1e99a9386516cab50ab9dcdcb69cfbe39cf97bf223e64e6b863d718596bf765", "fetched_at": "2026-08-28T04:03:54.322345+00:00", "kind": "readme", "missing": false, "url": "https://github.com/DMOJ/online-judge"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:03:54.322345+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:03:54.322345+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T06:24:45.496375+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e1e99a9386516cab50ab9dcdcb69cfbe39cf97bf223e64e6b863d718596bf765", "fetched_at": "2026-08-28T04:03:54.322345+00:00", "kind": "readme", "missing": false, "url": "https://github.com/DMOJ/online-judge"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T06:24:45.496375+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e1e99a9386516cab50ab9dcdcb69cfbe39cf97bf223e64e6b863d718596bf765", "fetched_at": "2026-08-28T04:03:54.322345+00:00", "kind": "readme", "missing": false, "url": "https://github.com/DMOJ/online-judge"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T06:24:45.496375+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e1e99a9386516cab50ab9dcdcb69cfbe39cf97bf223e64e6b863d718596bf765", "fetched_at": "2026-08-28T04:03:54.322345+00:00", "kind": "readme", "missing": false, "url": "https://github.com/DMOJ/online-judge"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T06:24:45.496375+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "e1e99a9386516cab50ab9dcdcb69cfbe39cf97bf223e64e6b863d718596bf765", "fetched_at": "2026-08-28T04:03:54.322345+00:00", "kind": "readme", "missing": false, "url": "https://github.com/DMOJ/online-judge"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 99, "longevity": 100, "rhythm": 8}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": [], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 4557, "days_push": 9, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 67, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}