{"adoption": {"forks": 94, "observed_at": "2026-08-28T04:05:06.677473+00:00", "stars": 1578}, "canonical_url": "https://ross.abutalabs.com/products/rjvm", "card": {"archived": false, "artifact_type": "application", "description": "A tiny JVM written in Rust. Learning project", "domain": ["programming-languages", "education", "developer-tools"], "enriched": true, "function": ["interpreter", "parser", "programming-language"], "health_score": 20, "homepage": null, "language": "Rust", "license": "Apache-2.0", "license_family": "permissive", "maturity": "experimental", "member_repos": ["andreabergia/rjvm"], "name": "andreabergia/rjvm", "platform": ["windows", "rust"], "pushed_at": "2024-01-24T08:02:43+00:00", "repo": "andreabergia/rjvm", "stars": 1578, "tags": ["jvm", "virtual-machine", "rust", "learning-project", "java", "bytecode", "class-file-parser", "garbage-collection", "linux", "macos"], "topics": [], "urls": [], "use_cases": ["learn how a JVM works internally", "study a JVM implementation written in Rust", "execute simple Java bytecode without a full JVM", "understand Java class file format parsing", "learn Rust by reading a real interpreter codebase", "explore garbage collection and exception handling in a VM"], "what_it_is": "A minimal Java Virtual Machine (JVM 7) implemented in Rust as a hobby learning project. It can parse .class files, resolve classes from jars or folders, and execute simple Java programs using real OpenJDK 7 classes, including features like exceptions, garbage collection, and virtual/static methods.", "when_to_avoid": ["you need a production-ready JVM to run real applications", "you need threading, reflection, I/O, JIT compilation, or class file verification", "you need full Java compatibility or multi-dimensional arrays", "you need a well-tested, documented, or maintained tool"], "when_to_choose": ["you want to read a small, approachable JVM implementation to learn VM internals", "you are learning Rust and want a real-world codebase to study", "you need to run very simple Java 7 programs for experimentation", "you want to follow a blog series explaining how to build a JVM from scratch"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/rjvm", "repo": "andreabergia/rjvm", "role": "main", "score": 31}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:05:06.677473+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T03:56:54.507442+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6ff1cd3119a5b7024759ae5ba7c36fb95d7399f68145b6c25cbd12518f03c838", "fetched_at": "2026-08-28T04:05:06.677473+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andreabergia/rjvm"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:05:06.677473+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T03:56:54.507442+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6ff1cd3119a5b7024759ae5ba7c36fb95d7399f68145b6c25cbd12518f03c838", "fetched_at": "2026-08-28T04:05:06.677473+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andreabergia/rjvm"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T03:56:54.507442+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6ff1cd3119a5b7024759ae5ba7c36fb95d7399f68145b6c25cbd12518f03c838", "fetched_at": "2026-08-28T04:05:06.677473+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andreabergia/rjvm"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:05:06.677473+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:05:06.677473+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:05:06.677473+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T03:56:54.507442+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6ff1cd3119a5b7024759ae5ba7c36fb95d7399f68145b6c25cbd12518f03c838", "fetched_at": "2026-08-28T04:05:06.677473+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andreabergia/rjvm"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:05:06.677473+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:05:06.677473+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T03:56:54.507442+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6ff1cd3119a5b7024759ae5ba7c36fb95d7399f68145b6c25cbd12518f03c838", "fetched_at": "2026-08-28T04:05:06.677473+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andreabergia/rjvm"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:05:06.677473+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:05:06.677473+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:05:06.677473+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T03:56:54.507442+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6ff1cd3119a5b7024759ae5ba7c36fb95d7399f68145b6c25cbd12518f03c838", "fetched_at": "2026-08-28T04:05:06.677473+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andreabergia/rjvm"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:05:06.677473+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:05:06.677473+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T03:56:54.507442+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6ff1cd3119a5b7024759ae5ba7c36fb95d7399f68145b6c25cbd12518f03c838", "fetched_at": "2026-08-28T04:05:06.677473+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andreabergia/rjvm"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T03:56:54.507442+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6ff1cd3119a5b7024759ae5ba7c36fb95d7399f68145b6c25cbd12518f03c838", "fetched_at": "2026-08-28T04:05:06.677473+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andreabergia/rjvm"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T03:56:54.507442+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6ff1cd3119a5b7024759ae5ba7c36fb95d7399f68145b6c25cbd12518f03c838", "fetched_at": "2026-08-28T04:05:06.677473+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andreabergia/rjvm"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T03:56:54.507442+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "6ff1cd3119a5b7024759ae5ba7c36fb95d7399f68145b6c25cbd12518f03c838", "fetched_at": "2026-08-28T04:05:06.677473+00:00", "kind": "readme", "missing": false, "url": "https://github.com/andreabergia/rjvm"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 0, "longevity": 92, "rhythm": 35}, "computed_at": "2026-09-02T17:46:02.011165+00:00", "flags": ["no_releases"], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 1299, "days_push": 952, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 31, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}