{"adoption": {"forks": 304, "observed_at": "2026-08-28T04:09:16.272397+00:00", "stars": 5384}, "canonical_url": "https://ross.abutalabs.com/products/pest-parser-pest", "card": {"archived": false, "artifact_type": "library", "description": "The Elegant Parser", "domain": ["parsers", "programming-languages", "developer-tools"], "enriched": true, "function": ["parser"], "health_score": 99, "homepage": "https://pest.rs", "language": "Rust", "license": "Apache-2.0", "license_family": "permissive", "maturity": "stable", "member_repos": ["pest-parser/pest"], "name": "pest-parser/pest", "platform": ["rust"], "pushed_at": "2026-08-20T00:58:02+00:00", "repo": "pest-parser/pest", "stars": 5384, "tags": ["peg", "grammar", "parser-generator", "parser-combinators", "error-reporting"], "topics": ["peg", "rust", "parsing"], "urls": [], "use_cases": ["parse a custom DSL in Rust", "write a PEG grammar for a config file format", "build a parser for a programming or markup language", "replace hand-written parsers with grammar-based ones", "get meaningful error messages when parsing fails", "parse structured text like identifiers, expressions, or logs"], "what_it_is": "pest is a general-purpose parser library for Rust based on parsing expression grammars (PEG). Grammars are defined in separate .pest files, and the library generates parsers with automatic, meaningful error reporting.", "when_to_avoid": ["you need a hand-tuned parser faster than nom or serde-level performance", "you need context-sensitive parsing beyond PEG expressivity", "you are not working in Rust"], "when_to_choose": ["you are writing Rust and need a parser for a text format or language", "you want grammars kept separate from procedural code", "you need good error reporting out of the box", "you want correctness guarantees from a declarative grammar"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/pest-parser-pest", "repo": "pest-parser/pest", "role": "main", "score": 94}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:09:16.272397+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-29T17:58:26.115358+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a9ed0d1aedd096ba130a0dd2511e558448a0530e6bf6a001949c1da57712bee5", "fetched_at": "2026-08-28T04:09:16.272397+00:00", "kind": "readme", "missing": false, "url": "https://github.com/pest-parser/pest"}, {"content_hash": "c5a091efe0ac1f1e906cd6515ff367107e03174bd45db112ea4196df61677c34", "fetched_at": "2026-08-29T08:52:47.156790+00:00", "kind": "homepage", "missing": false, "url": "https://pest.rs"}, {"content_hash": "d4885a711b7387eabb5aa81bf93abaad4dd95afe7b21df86879fa0cba7fa3610", "fetched_at": "2026-08-29T08:52:47.165848+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/pest"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:09:16.272397+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-29T17:58:26.115358+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a9ed0d1aedd096ba130a0dd2511e558448a0530e6bf6a001949c1da57712bee5", "fetched_at": "2026-08-28T04:09:16.272397+00:00", "kind": "readme", "missing": false, "url": "https://github.com/pest-parser/pest"}, {"content_hash": "c5a091efe0ac1f1e906cd6515ff367107e03174bd45db112ea4196df61677c34", "fetched_at": "2026-08-29T08:52:47.156790+00:00", "kind": "homepage", "missing": false, "url": "https://pest.rs"}, {"content_hash": "d4885a711b7387eabb5aa81bf93abaad4dd95afe7b21df86879fa0cba7fa3610", "fetched_at": "2026-08-29T08:52:47.165848+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/pest"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-29T17:58:26.115358+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a9ed0d1aedd096ba130a0dd2511e558448a0530e6bf6a001949c1da57712bee5", "fetched_at": "2026-08-28T04:09:16.272397+00:00", "kind": "readme", "missing": false, "url": "https://github.com/pest-parser/pest"}, {"content_hash": "c5a091efe0ac1f1e906cd6515ff367107e03174bd45db112ea4196df61677c34", "fetched_at": "2026-08-29T08:52:47.156790+00:00", "kind": "homepage", "missing": false, "url": "https://pest.rs"}, {"content_hash": "d4885a711b7387eabb5aa81bf93abaad4dd95afe7b21df86879fa0cba7fa3610", "fetched_at": "2026-08-29T08:52:47.165848+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/pest"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:09:16.272397+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:09:16.272397+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:09:16.272397+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-29T17:58:26.115358+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a9ed0d1aedd096ba130a0dd2511e558448a0530e6bf6a001949c1da57712bee5", "fetched_at": "2026-08-28T04:09:16.272397+00:00", "kind": "readme", "missing": false, "url": "https://github.com/pest-parser/pest"}, {"content_hash": "c5a091efe0ac1f1e906cd6515ff367107e03174bd45db112ea4196df61677c34", "fetched_at": "2026-08-29T08:52:47.156790+00:00", "kind": "homepage", "missing": false, "url": "https://pest.rs"}, {"content_hash": "d4885a711b7387eabb5aa81bf93abaad4dd95afe7b21df86879fa0cba7fa3610", "fetched_at": "2026-08-29T08:52:47.165848+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/pest"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:09:16.272397+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:09:16.272397+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-29T17:58:26.115358+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a9ed0d1aedd096ba130a0dd2511e558448a0530e6bf6a001949c1da57712bee5", "fetched_at": "2026-08-28T04:09:16.272397+00:00", "kind": "readme", "missing": false, "url": "https://github.com/pest-parser/pest"}, {"content_hash": "c5a091efe0ac1f1e906cd6515ff367107e03174bd45db112ea4196df61677c34", "fetched_at": "2026-08-29T08:52:47.156790+00:00", "kind": "homepage", "missing": false, "url": "https://pest.rs"}, {"content_hash": "d4885a711b7387eabb5aa81bf93abaad4dd95afe7b21df86879fa0cba7fa3610", "fetched_at": "2026-08-29T08:52:47.165848+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/pest"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:09:16.272397+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:09:16.272397+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:09:16.272397+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-29T17:58:26.115358+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a9ed0d1aedd096ba130a0dd2511e558448a0530e6bf6a001949c1da57712bee5", "fetched_at": "2026-08-28T04:09:16.272397+00:00", "kind": "readme", "missing": false, "url": "https://github.com/pest-parser/pest"}, {"content_hash": "c5a091efe0ac1f1e906cd6515ff367107e03174bd45db112ea4196df61677c34", "fetched_at": "2026-08-29T08:52:47.156790+00:00", "kind": "homepage", "missing": false, "url": "https://pest.rs"}, {"content_hash": "d4885a711b7387eabb5aa81bf93abaad4dd95afe7b21df86879fa0cba7fa3610", "fetched_at": "2026-08-29T08:52:47.165848+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/pest"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:09:16.272397+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:09:16.272397+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-29T17:58:26.115358+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a9ed0d1aedd096ba130a0dd2511e558448a0530e6bf6a001949c1da57712bee5", "fetched_at": "2026-08-28T04:09:16.272397+00:00", "kind": "readme", "missing": false, "url": "https://github.com/pest-parser/pest"}, {"content_hash": "c5a091efe0ac1f1e906cd6515ff367107e03174bd45db112ea4196df61677c34", "fetched_at": "2026-08-29T08:52:47.156790+00:00", "kind": "homepage", "missing": false, "url": "https://pest.rs"}, {"content_hash": "d4885a711b7387eabb5aa81bf93abaad4dd95afe7b21df86879fa0cba7fa3610", "fetched_at": "2026-08-29T08:52:47.165848+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/pest"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-29T17:58:26.115358+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a9ed0d1aedd096ba130a0dd2511e558448a0530e6bf6a001949c1da57712bee5", "fetched_at": "2026-08-28T04:09:16.272397+00:00", "kind": "readme", "missing": false, "url": "https://github.com/pest-parser/pest"}, {"content_hash": "c5a091efe0ac1f1e906cd6515ff367107e03174bd45db112ea4196df61677c34", "fetched_at": "2026-08-29T08:52:47.156790+00:00", "kind": "homepage", "missing": false, "url": "https://pest.rs"}, {"content_hash": "d4885a711b7387eabb5aa81bf93abaad4dd95afe7b21df86879fa0cba7fa3610", "fetched_at": "2026-08-29T08:52:47.165848+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/pest"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-29T17:58:26.115358+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a9ed0d1aedd096ba130a0dd2511e558448a0530e6bf6a001949c1da57712bee5", "fetched_at": "2026-08-28T04:09:16.272397+00:00", "kind": "readme", "missing": false, "url": "https://github.com/pest-parser/pest"}, {"content_hash": "c5a091efe0ac1f1e906cd6515ff367107e03174bd45db112ea4196df61677c34", "fetched_at": "2026-08-29T08:52:47.156790+00:00", "kind": "homepage", "missing": false, "url": "https://pest.rs"}, {"content_hash": "d4885a711b7387eabb5aa81bf93abaad4dd95afe7b21df86879fa0cba7fa3610", "fetched_at": "2026-08-29T08:52:47.165848+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/pest"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-29T17:58:26.115358+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a9ed0d1aedd096ba130a0dd2511e558448a0530e6bf6a001949c1da57712bee5", "fetched_at": "2026-08-28T04:09:16.272397+00:00", "kind": "readme", "missing": false, "url": "https://github.com/pest-parser/pest"}, {"content_hash": "c5a091efe0ac1f1e906cd6515ff367107e03174bd45db112ea4196df61677c34", "fetched_at": "2026-08-29T08:52:47.156790+00:00", "kind": "homepage", "missing": false, "url": "https://pest.rs"}, {"content_hash": "d4885a711b7387eabb5aa81bf93abaad4dd95afe7b21df86879fa0cba7fa3610", "fetched_at": "2026-08-29T08:52:47.165848+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/pest"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 98, "longevity": 100, "rhythm": 85}, "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": 3783, "days_push": 14, "days_rel": 20, "gap_med": 45.5, "n_releases_24m": 15}, "score": 94, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}