{"adoption": {"forks": 334, "observed_at": "2026-08-28T04:07:10.948678+00:00", "stars": 2690}, "canonical_url": "https://ross.abutalabs.com/products/ck", "card": {"archived": false, "artifact_type": "library", "description": "Concurrency primitives, safe memory reclamation mechanisms and non-blocking (including lock-free) data structures designed to aid in the research, design and implementation of high performance concurrent systems developed in C99+.", "domain": ["performance", "developer-tools", "operating-systems"], "enriched": true, "function": ["concurrency", "developer-tools"], "health_score": 84, "homepage": "http://concurrencykit.org/", "language": "C", "license": "NOASSERTION", "license_family": "other", "maturity": "stable", "member_repos": ["concurrencykit/ck"], "name": "concurrencykit/ck", "platform": ["windows", "bsd", "cpp", "c", "cross-platform"], "pushed_at": "2026-08-10T20:03:51+00:00", "repo": "concurrencykit/ck", "stars": 2690, "tags": ["lock-free", "memory-reclamation", "hazard-pointers", "epoch-based-reclamation", "atomic-operations", "c99", "high-performance", "data-structures", "algorithms", "linux", "macos"], "topics": [], "urls": [], "use_cases": ["implement lock-free queues in C", "safe memory reclamation for concurrent data structures", "atomic operations and CAS primitives across architectures", "build high-performance concurrent systems", "concurrent bitmap and pointer array structures", "research non-blocking algorithms"], "what_it_is": "Concurrency Kit (ck) is a C99 library providing concurrency primitives, safe memory reclamation mechanisms (epoch-based and hazard pointers), and non-blocking/lock-free data structures. It includes architecture-specific assembly optimizations for many platforms with compiler built-in fallbacks.", "when_to_avoid": ["you want a high-level threading API with locks and thread pools", "working in a managed language with garbage collection", "your project is not in C99+ or lacks a configure-based build"], "when_to_choose": ["writing performance-critical C/C++ concurrent code needing lock-free structures", "you need battle-tested safe memory reclamation (epoch or hazard pointers)", "targeting multiple architectures with specialized assembly support"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/ck", "repo": "concurrencykit/ck", "role": "main", "score": 66}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:07:10.948678+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T02:16:34.625630+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "7f8fb20fc31e87e5985f073edfbf7fb13254256cc96f9df94b7705329c2da05d", "fetched_at": "2026-08-28T04:07:10.948678+00:00", "kind": "readme", "missing": false, "url": "https://github.com/concurrencykit/ck"}, {"content_hash": "956b7880c94541424afe48a407235c0888837cf41e9dc5fef33ea4169f347d18", "fetched_at": "2026-08-29T09:59:37.303359+00:00", "kind": "homepage", "missing": false, "url": "http://concurrencykit.org/"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:07:10.948678+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T02:16:34.625630+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "7f8fb20fc31e87e5985f073edfbf7fb13254256cc96f9df94b7705329c2da05d", "fetched_at": "2026-08-28T04:07:10.948678+00:00", "kind": "readme", "missing": false, "url": "https://github.com/concurrencykit/ck"}, {"content_hash": "956b7880c94541424afe48a407235c0888837cf41e9dc5fef33ea4169f347d18", "fetched_at": "2026-08-29T09:59:37.303359+00:00", "kind": "homepage", "missing": false, "url": "http://concurrencykit.org/"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T02:16:34.625630+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "7f8fb20fc31e87e5985f073edfbf7fb13254256cc96f9df94b7705329c2da05d", "fetched_at": "2026-08-28T04:07:10.948678+00:00", "kind": "readme", "missing": false, "url": "https://github.com/concurrencykit/ck"}, {"content_hash": "956b7880c94541424afe48a407235c0888837cf41e9dc5fef33ea4169f347d18", "fetched_at": "2026-08-29T09:59:37.303359+00:00", "kind": "homepage", "missing": false, "url": "http://concurrencykit.org/"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:07:10.948678+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:07:10.948678+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:07:10.948678+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T02:16:34.625630+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "7f8fb20fc31e87e5985f073edfbf7fb13254256cc96f9df94b7705329c2da05d", "fetched_at": "2026-08-28T04:07:10.948678+00:00", "kind": "readme", "missing": false, "url": "https://github.com/concurrencykit/ck"}, {"content_hash": "956b7880c94541424afe48a407235c0888837cf41e9dc5fef33ea4169f347d18", "fetched_at": "2026-08-29T09:59:37.303359+00:00", "kind": "homepage", "missing": false, "url": "http://concurrencykit.org/"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:07:10.948678+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:07:10.948678+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T02:16:34.625630+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "7f8fb20fc31e87e5985f073edfbf7fb13254256cc96f9df94b7705329c2da05d", "fetched_at": "2026-08-28T04:07:10.948678+00:00", "kind": "readme", "missing": false, "url": "https://github.com/concurrencykit/ck"}, {"content_hash": "956b7880c94541424afe48a407235c0888837cf41e9dc5fef33ea4169f347d18", "fetched_at": "2026-08-29T09:59:37.303359+00:00", "kind": "homepage", "missing": false, "url": "http://concurrencykit.org/"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:07:10.948678+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:07:10.948678+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:07:10.948678+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T02:16:34.625630+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "7f8fb20fc31e87e5985f073edfbf7fb13254256cc96f9df94b7705329c2da05d", "fetched_at": "2026-08-28T04:07:10.948678+00:00", "kind": "readme", "missing": false, "url": "https://github.com/concurrencykit/ck"}, {"content_hash": "956b7880c94541424afe48a407235c0888837cf41e9dc5fef33ea4169f347d18", "fetched_at": "2026-08-29T09:59:37.303359+00:00", "kind": "homepage", "missing": false, "url": "http://concurrencykit.org/"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:07:10.948678+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:07:10.948678+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T02:16:34.625630+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "7f8fb20fc31e87e5985f073edfbf7fb13254256cc96f9df94b7705329c2da05d", "fetched_at": "2026-08-28T04:07:10.948678+00:00", "kind": "readme", "missing": false, "url": "https://github.com/concurrencykit/ck"}, {"content_hash": "956b7880c94541424afe48a407235c0888837cf41e9dc5fef33ea4169f347d18", "fetched_at": "2026-08-29T09:59:37.303359+00:00", "kind": "homepage", "missing": false, "url": "http://concurrencykit.org/"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T02:16:34.625630+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "7f8fb20fc31e87e5985f073edfbf7fb13254256cc96f9df94b7705329c2da05d", "fetched_at": "2026-08-28T04:07:10.948678+00:00", "kind": "readme", "missing": false, "url": "https://github.com/concurrencykit/ck"}, {"content_hash": "956b7880c94541424afe48a407235c0888837cf41e9dc5fef33ea4169f347d18", "fetched_at": "2026-08-29T09:59:37.303359+00:00", "kind": "homepage", "missing": false, "url": "http://concurrencykit.org/"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T02:16:34.625630+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "7f8fb20fc31e87e5985f073edfbf7fb13254256cc96f9df94b7705329c2da05d", "fetched_at": "2026-08-28T04:07:10.948678+00:00", "kind": "readme", "missing": false, "url": "https://github.com/concurrencykit/ck"}, {"content_hash": "956b7880c94541424afe48a407235c0888837cf41e9dc5fef33ea4169f347d18", "fetched_at": "2026-08-29T09:59:37.303359+00:00", "kind": "homepage", "missing": false, "url": "http://concurrencykit.org/"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T02:16:34.625630+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "7f8fb20fc31e87e5985f073edfbf7fb13254256cc96f9df94b7705329c2da05d", "fetched_at": "2026-08-28T04:07:10.948678+00:00", "kind": "readme", "missing": false, "url": "https://github.com/concurrencykit/ck"}, {"content_hash": "956b7880c94541424afe48a407235c0888837cf41e9dc5fef33ea4169f347d18", "fetched_at": "2026-08-29T09:59:37.303359+00:00", "kind": "homepage", "missing": false, "url": "http://concurrencykit.org/"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 97, "longevity": 100, "rhythm": 8}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": ["no_license"], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 4521, "days_push": 23, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 66, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}