{"adoption": {"forks": 915, "observed_at": "2026-08-28T04:09:58.030672+00:00", "stars": 7286}, "canonical_url": "https://ross.abutalabs.com/products/kvocontroller", "card": {"archived": true, "artifact_type": "library", "description": "Simple, modern, thread-safe key-value observing for iOS and OS X.", "domain": ["apple-ecosystem", "developer-tools", "mobile-development", "cross-platform"], "enriched": true, "function": ["developer-tools", "concurrency", "error-handling"], "health_score": 10, "homepage": null, "language": "Objective-C", "license": "NOASSERTION", "license_family": "other", "maturity": "maintenance", "member_repos": ["facebookarchive/KVOController"], "name": "facebookarchive/KVOController", "platform": ["cpp"], "pushed_at": "2020-01-25T04:18:28+00:00", "repo": "facebookarchive/KVOController", "stars": 7286, "tags": ["key-value-observing", "objective-c", "cocoa", "thread-safe", "reactive", "mvc", "cocoapods", "facebook-archive", "ios", "macos", "swift"], "topics": [], "urls": [], "use_cases": ["observe object property changes safely in iOS apps", "replace raw KVO with block-based callbacks", "avoid crashes from observer resurrection and unbalanced removals", "communicate between model and view layers in MVC", "use KVO from Swift with dynamic properties", "auto-remove observers on dealloc without manual cleanup"], "what_it_is": "A thread-safe Objective-C library that simplifies Cocoa's key-value observing (KVO) on iOS and OS X. It offers a modern API supporting block-based, action-based, or NSKeyValueObserving callbacks with automatic observer cleanup on deallocation.", "when_to_avoid": ["you can use Swift's native Combine or async observation APIs instead", "you target platforms other than iOS/OS X", "you need actively maintained software - the repo is archived"], "when_to_choose": ["you need thread-safe KVO in Objective-C or Swift on iOS/macOS", "you want implicit observer removal to prevent leaks and crashes", "you prefer block callbacks over manual observeValueForKeyPath boilerplate"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/kvocontroller", "repo": "facebookarchive/KVOController", "role": "main", "score": 10}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:09:58.030672+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-29T17:38:52.430333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "901941f59ade8d37884cc1b344a4d3ed9acad23c4feddeab849fe9eb0cb9f70f", "fetched_at": "2026-08-28T04:09:58.030672+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/KVOController"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:09:58.030672+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-29T17:38:52.430333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "901941f59ade8d37884cc1b344a4d3ed9acad23c4feddeab849fe9eb0cb9f70f", "fetched_at": "2026-08-28T04:09:58.030672+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/KVOController"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-29T17:38:52.430333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "901941f59ade8d37884cc1b344a4d3ed9acad23c4feddeab849fe9eb0cb9f70f", "fetched_at": "2026-08-28T04:09:58.030672+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/KVOController"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:09:58.030672+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:09:58.030672+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:09:58.030672+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-29T17:38:52.430333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "901941f59ade8d37884cc1b344a4d3ed9acad23c4feddeab849fe9eb0cb9f70f", "fetched_at": "2026-08-28T04:09:58.030672+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/KVOController"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:09:58.030672+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:09:58.030672+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-29T17:38:52.430333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "901941f59ade8d37884cc1b344a4d3ed9acad23c4feddeab849fe9eb0cb9f70f", "fetched_at": "2026-08-28T04:09:58.030672+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/KVOController"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:09:58.030672+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:09:58.030672+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:09:58.030672+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-29T17:38:52.430333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "901941f59ade8d37884cc1b344a4d3ed9acad23c4feddeab849fe9eb0cb9f70f", "fetched_at": "2026-08-28T04:09:58.030672+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/KVOController"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:09:58.030672+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:09:58.030672+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-29T17:38:52.430333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "901941f59ade8d37884cc1b344a4d3ed9acad23c4feddeab849fe9eb0cb9f70f", "fetched_at": "2026-08-28T04:09:58.030672+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/KVOController"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-29T17:38:52.430333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "901941f59ade8d37884cc1b344a4d3ed9acad23c4feddeab849fe9eb0cb9f70f", "fetched_at": "2026-08-28T04:09:58.030672+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/KVOController"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-29T17:38:52.430333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "901941f59ade8d37884cc1b344a4d3ed9acad23c4feddeab849fe9eb0cb9f70f", "fetched_at": "2026-08-28T04:09:58.030672+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/KVOController"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-29T17:38:52.430333+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "901941f59ade8d37884cc1b344a4d3ed9acad23c4feddeab849fe9eb0cb9f70f", "fetched_at": "2026-08-28T04:09:58.030672+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/KVOController"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 0, "longevity": 100, "rhythm": 8}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": ["archived", "no_license"], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 4573, "days_push": 2412, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 10, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}