{"adoption": {"forks": 203, "observed_at": "2026-08-28T04:08:28.795981+00:00", "stars": 3907}, "canonical_url": "https://ross.abutalabs.com/products/kemal", "card": {"archived": false, "artifact_type": "framework", "description": "Fast, Effective, Simple Web Framework", "domain": ["web-development", "backend", "apis"], "enriched": true, "function": ["web-framework", "http-server", "routing", "middleware", "websocket", "templating", "json", "static-site-generator"], "health_score": 100, "homepage": "https://kemalcr.com", "language": "Crystal", "license": "MIT", "license_family": "permissive", "maturity": "stable", "member_repos": ["kemalcr/kemal"], "name": "kemalcr/kemal", "platform": [], "pushed_at": "2026-08-26T13:02:30+00:00", "repo": "kemalcr/kemal", "stars": 3907, "tags": ["rest-api", "microservices", "high-performance", "dsl", "sinatra-inspired", "real-time", "crystal", "linux", "macos", "web-server"], "topics": ["crystal", "kemal", "web-framework", "websocket", "api", "fast", "simple", "efficient", "json", "rest"], "urls": [], "use_cases": ["build a fast json rest api", "create a web application in crystal", "build a real-time app with websockets", "serve static files with high performance", "build a microservice with minimal boilerplate", "create a live dashboard or chat app"], "what_it_is": "Kemal is a fast, lightweight web framework for the Crystal language with a Sinatra-like DSL for building web applications and JSON APIs. It offers built-in routing, WebSocket support, middleware, static file serving, and templating with near-native performance.", "when_to_avoid": ["your team doesn't know Crystal and can't adopt a niche language", "you need a batteries-included full-stack framework with built-in ORM and admin tooling", "you need a large ecosystem of third-party libraries and hiring pool"], "when_to_choose": ["you want Ruby-like syntax with compiled, C-level performance", "you need a simple, unopinionated framework without a forced ORM", "you're building JSON APIs or real-time WebSocket services in Crystal", "fast startup and low memory footprint matter"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/kemal", "repo": "kemalcr/kemal", "role": "main", "score": 95}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:08:28.795981+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-29T18:25:06.366439+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "eae22595fef7049bd2272798a7679315b9023102b618d79817081717ccf98f44", "fetched_at": "2026-08-28T04:08:28.795981+00:00", "kind": "readme", "missing": false, "url": "https://github.com/kemalcr/kemal"}, {"content_hash": "95694922e330bb8ebfd3e91141c3eeaa12c0ffd82073ce857711f25738fcc904", "fetched_at": "2026-08-29T09:19:06.414050+00:00", "kind": "homepage", "missing": false, "url": "https://kemalcr.com"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:08:28.795981+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-29T18:25:06.366439+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "eae22595fef7049bd2272798a7679315b9023102b618d79817081717ccf98f44", "fetched_at": "2026-08-28T04:08:28.795981+00:00", "kind": "readme", "missing": false, "url": "https://github.com/kemalcr/kemal"}, {"content_hash": "95694922e330bb8ebfd3e91141c3eeaa12c0ffd82073ce857711f25738fcc904", "fetched_at": "2026-08-29T09:19:06.414050+00:00", "kind": "homepage", "missing": false, "url": "https://kemalcr.com"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-29T18:25:06.366439+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "eae22595fef7049bd2272798a7679315b9023102b618d79817081717ccf98f44", "fetched_at": "2026-08-28T04:08:28.795981+00:00", "kind": "readme", "missing": false, "url": "https://github.com/kemalcr/kemal"}, {"content_hash": "95694922e330bb8ebfd3e91141c3eeaa12c0ffd82073ce857711f25738fcc904", "fetched_at": "2026-08-29T09:19:06.414050+00:00", "kind": "homepage", "missing": false, "url": "https://kemalcr.com"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:08:28.795981+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:08:28.795981+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:08:28.795981+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-29T18:25:06.366439+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "eae22595fef7049bd2272798a7679315b9023102b618d79817081717ccf98f44", "fetched_at": "2026-08-28T04:08:28.795981+00:00", "kind": "readme", "missing": false, "url": "https://github.com/kemalcr/kemal"}, {"content_hash": "95694922e330bb8ebfd3e91141c3eeaa12c0ffd82073ce857711f25738fcc904", "fetched_at": "2026-08-29T09:19:06.414050+00:00", "kind": "homepage", "missing": false, "url": "https://kemalcr.com"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:08:28.795981+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:08:28.795981+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-29T18:25:06.366439+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "eae22595fef7049bd2272798a7679315b9023102b618d79817081717ccf98f44", "fetched_at": "2026-08-28T04:08:28.795981+00:00", "kind": "readme", "missing": false, "url": "https://github.com/kemalcr/kemal"}, {"content_hash": "95694922e330bb8ebfd3e91141c3eeaa12c0ffd82073ce857711f25738fcc904", "fetched_at": "2026-08-29T09:19:06.414050+00:00", "kind": "homepage", "missing": false, "url": "https://kemalcr.com"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:08:28.795981+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:08:28.795981+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:08:28.795981+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-29T18:25:06.366439+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "eae22595fef7049bd2272798a7679315b9023102b618d79817081717ccf98f44", "fetched_at": "2026-08-28T04:08:28.795981+00:00", "kind": "readme", "missing": false, "url": "https://github.com/kemalcr/kemal"}, {"content_hash": "95694922e330bb8ebfd3e91141c3eeaa12c0ffd82073ce857711f25738fcc904", "fetched_at": "2026-08-29T09:19:06.414050+00:00", "kind": "homepage", "missing": false, "url": "https://kemalcr.com"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:08:28.795981+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:08:28.795981+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-29T18:25:06.366439+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "eae22595fef7049bd2272798a7679315b9023102b618d79817081717ccf98f44", "fetched_at": "2026-08-28T04:08:28.795981+00:00", "kind": "readme", "missing": false, "url": "https://github.com/kemalcr/kemal"}, {"content_hash": "95694922e330bb8ebfd3e91141c3eeaa12c0ffd82073ce857711f25738fcc904", "fetched_at": "2026-08-29T09:19:06.414050+00:00", "kind": "homepage", "missing": false, "url": "https://kemalcr.com"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-29T18:25:06.366439+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "eae22595fef7049bd2272798a7679315b9023102b618d79817081717ccf98f44", "fetched_at": "2026-08-28T04:08:28.795981+00:00", "kind": "readme", "missing": false, "url": "https://github.com/kemalcr/kemal"}, {"content_hash": "95694922e330bb8ebfd3e91141c3eeaa12c0ffd82073ce857711f25738fcc904", "fetched_at": "2026-08-29T09:19:06.414050+00:00", "kind": "homepage", "missing": false, "url": "https://kemalcr.com"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-29T18:25:06.366439+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "eae22595fef7049bd2272798a7679315b9023102b618d79817081717ccf98f44", "fetched_at": "2026-08-28T04:08:28.795981+00:00", "kind": "readme", "missing": false, "url": "https://github.com/kemalcr/kemal"}, {"content_hash": "95694922e330bb8ebfd3e91141c3eeaa12c0ffd82073ce857711f25738fcc904", "fetched_at": "2026-08-29T09:19:06.414050+00:00", "kind": "homepage", "missing": false, "url": "https://kemalcr.com"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-29T18:25:06.366439+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "eae22595fef7049bd2272798a7679315b9023102b618d79817081717ccf98f44", "fetched_at": "2026-08-28T04:08:28.795981+00:00", "kind": "readme", "missing": false, "url": "https://github.com/kemalcr/kemal"}, {"content_hash": "95694922e330bb8ebfd3e91141c3eeaa12c0ffd82073ce857711f25738fcc904", "fetched_at": "2026-08-29T09:19:06.414050+00:00", "kind": "homepage", "missing": false, "url": "https://kemalcr.com"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 99, "longevity": 100, "rhythm": 87}, "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": 3967, "days_push": 7, "days_rel": 9, "gap_med": 35, "n_releases_24m": 12}, "score": 95, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}