{"adoption": {"forks": 226, "observed_at": "2026-08-28T04:09:22.224076+00:00", "stars": 5543}, "canonical_url": "https://ross.abutalabs.com/products/ohm", "card": {"archived": false, "artifact_type": "library", "description": "A library and language for building parsers, interpreters, compilers, etc.", "domain": ["parsers", "programming-languages", "developer-tools", "compilers"], "enriched": true, "function": ["parser", "compiler", "interpreter", "programming-language"], "health_score": 90, "homepage": null, "language": "JavaScript", "license": "MIT", "license_family": "permissive", "maturity": "active", "member_repos": ["ohmjs/ohm"], "name": "ohmjs/ohm", "platform": ["browser"], "pushed_at": "2026-06-19T06:06:39+00:00", "repo": "ohmjs/ohm", "stars": 5543, "tags": ["peg", "grammars", "parsing-toolkit", "dsl", "semantic-actions", "left-recursion", "javascript", "nodejs", "typescript"], "topics": ["parsing", "peg", "grammars", "parser", "javascript", "typescript", "compiler"], "urls": [], "use_cases": ["parse a custom file format in JavaScript", "build a DSL with a parser and interpreter", "create a programming language compiler", "define grammars with left-recursive rules", "prototype language syntax with an online grammar editor", "separate grammar definitions from semantic actions"], "what_it_is": "Ohm is a parsing toolkit consisting of a JavaScript library and a domain-specific language based on parsing expression grammars (PEGs). It is used to build parsers, interpreters, and compilers for custom file formats and programming languages.", "when_to_avoid": ["you need a parser in a language other than JavaScript", "you only need simple regex-based text matching", "you need maximum parsing performance for huge inputs"], "when_to_choose": ["you need a parser for a custom language or file format in JavaScript/TypeScript", "you want modular separation of grammars and semantic actions", "you need natural support for left-recursive and left-associative rules", "you want to iteratively develop grammars with visual feedback"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/ohm", "repo": "ohmjs/ohm", "role": "main", "score": 80}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:09:22.224076+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-29T17:55:41.622502+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "18d0d9bb7eab3770b52d7e46ae7a4427088b65231a2bc25b03079673cf4e0b82", "fetched_at": "2026-08-28T04:09:22.224076+00:00", "kind": "readme", "missing": false, "url": "https://github.com/ohmjs/ohm"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:09:22.224076+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-29T17:55:41.622502+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "18d0d9bb7eab3770b52d7e46ae7a4427088b65231a2bc25b03079673cf4e0b82", "fetched_at": "2026-08-28T04:09:22.224076+00:00", "kind": "readme", "missing": false, "url": "https://github.com/ohmjs/ohm"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-29T17:55:41.622502+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "18d0d9bb7eab3770b52d7e46ae7a4427088b65231a2bc25b03079673cf4e0b82", "fetched_at": "2026-08-28T04:09:22.224076+00:00", "kind": "readme", "missing": false, "url": "https://github.com/ohmjs/ohm"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:09:22.224076+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:09:22.224076+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:09:22.224076+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-29T17:55:41.622502+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "18d0d9bb7eab3770b52d7e46ae7a4427088b65231a2bc25b03079673cf4e0b82", "fetched_at": "2026-08-28T04:09:22.224076+00:00", "kind": "readme", "missing": false, "url": "https://github.com/ohmjs/ohm"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:09:22.224076+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:09:22.224076+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-29T17:55:41.622502+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "18d0d9bb7eab3770b52d7e46ae7a4427088b65231a2bc25b03079673cf4e0b82", "fetched_at": "2026-08-28T04:09:22.224076+00:00", "kind": "readme", "missing": false, "url": "https://github.com/ohmjs/ohm"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:09:22.224076+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:09:22.224076+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:09:22.224076+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-29T17:55:41.622502+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "18d0d9bb7eab3770b52d7e46ae7a4427088b65231a2bc25b03079673cf4e0b82", "fetched_at": "2026-08-28T04:09:22.224076+00:00", "kind": "readme", "missing": false, "url": "https://github.com/ohmjs/ohm"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:09:22.224076+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:09:22.224076+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-29T17:55:41.622502+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "18d0d9bb7eab3770b52d7e46ae7a4427088b65231a2bc25b03079673cf4e0b82", "fetched_at": "2026-08-28T04:09:22.224076+00:00", "kind": "readme", "missing": false, "url": "https://github.com/ohmjs/ohm"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-29T17:55:41.622502+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "18d0d9bb7eab3770b52d7e46ae7a4427088b65231a2bc25b03079673cf4e0b82", "fetched_at": "2026-08-28T04:09:22.224076+00:00", "kind": "readme", "missing": false, "url": "https://github.com/ohmjs/ohm"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-29T17:55:41.622502+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "18d0d9bb7eab3770b52d7e46ae7a4427088b65231a2bc25b03079673cf4e0b82", "fetched_at": "2026-08-28T04:09:22.224076+00:00", "kind": "readme", "missing": false, "url": "https://github.com/ohmjs/ohm"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-29T17:55:41.622502+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "18d0d9bb7eab3770b52d7e46ae7a4427088b65231a2bc25b03079673cf4e0b82", "fetched_at": "2026-08-28T04:09:22.224076+00:00", "kind": "readme", "missing": false, "url": "https://github.com/ohmjs/ohm"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 88, "longevity": 100, "rhythm": 58}, "computed_at": "2026-09-02T17:46:02.011165+00:00", "flags": [], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 4122, "days_push": 75, "days_rel": 200, "gap_med": 53, "n_releases_24m": 4}, "score": 80, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}