{"adoption": {"forks": 272, "observed_at": "2026-08-28T04:05:43.207418+00:00", "stars": 1842}, "canonical_url": "https://ross.abutalabs.com/products/effective-typescript", "card": {"archived": false, "artifact_type": "learning-resource", "description": "Effective TypeScript 2nd Edition: 83 Specific Ways to Improve Your TypeScript", "domain": ["programming-languages", "tutorials", "web-development", "developer-tools"], "enriched": true, "function": ["developer-tools", "type-system", "documentation"], "health_score": 61, "homepage": "https://effectivetypescript.com", "language": null, "license": "NOASSERTION", "license_family": "other", "maturity": "active", "member_repos": ["danvk/effective-typescript"], "name": "danvk/effective-typescript", "platform": ["cross-platform"], "pushed_at": "2025-12-19T20:18:22+00:00", "repo": "danvk/effective-typescript", "stars": 1842, "tags": ["typescript", "book", "code-samples", "oreilly", "type-safety", "javascript", "nodejs"], "topics": ["utterances", "typescript", "books"], "urls": [], "use_cases": ["learn typescript best practices", "improve my typescript type safety", "find typescript code examples for common patterns", "understand differences between type and interface", "reduce use of any in typescript", "study for a typescript interview", "get actionable advice on typescript type design"], "what_it_is": "The companion code-sample repository for the book 'Effective TypeScript: 83 Specific Ways to Improve Your TypeScript' (O'Reilly, 2nd Edition, 2024) by Dan Vanderkam. It contains verified, runnable TypeScript samples for every item in the book, each with 'Things to Remember' summaries and TypeScript playground links.", "when_to_avoid": ["you want a runnable library or tool rather than educational material", "you need a complete TypeScript tutorial without buying the book, since samples assume book context", "you are not working in the TypeScript/JavaScript ecosystem"], "when_to_choose": ["you are reading the book and want the accompanying code samples", "you want curated, verified examples of TypeScript idioms and pitfalls", "you want structured, item-by-item learning material for TypeScript"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/effective-typescript", "repo": "danvk/effective-typescript", "role": "main", "score": 49}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:05:43.207418+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T03:17:59.218336+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3f022ea078a4f0841ac84dc11abf7678dd5f65e6963b1eff895699c93c69eb93", "fetched_at": "2026-08-28T04:05:43.207418+00:00", "kind": "readme", "missing": false, "url": "https://github.com/danvk/effective-typescript"}, {"content_hash": "e109b2286494b2b1f8d7b3a0e13c7cc7aac407afa9d5beec63553eb0cfc48165", "fetched_at": "2026-08-29T10:57:23.104570+00:00", "kind": "homepage", "missing": false, "url": "https://effectivetypescript.com"}, {"content_hash": "d0b61f44c12284a3cdf382a809b4f75267d1f84b0790c4d49b00bae5e52c788b", "fetched_at": "2026-08-29T10:57:23.115169+00:00", "kind": "site_page", "missing": false, "url": "https://effectivetypescript.com/2023/05/31/jsdoc-repeat"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:05:43.207418+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T03:17:59.218336+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3f022ea078a4f0841ac84dc11abf7678dd5f65e6963b1eff895699c93c69eb93", "fetched_at": "2026-08-28T04:05:43.207418+00:00", "kind": "readme", "missing": false, "url": "https://github.com/danvk/effective-typescript"}, {"content_hash": "e109b2286494b2b1f8d7b3a0e13c7cc7aac407afa9d5beec63553eb0cfc48165", "fetched_at": "2026-08-29T10:57:23.104570+00:00", "kind": "homepage", "missing": false, "url": "https://effectivetypescript.com"}, {"content_hash": "d0b61f44c12284a3cdf382a809b4f75267d1f84b0790c4d49b00bae5e52c788b", "fetched_at": "2026-08-29T10:57:23.115169+00:00", "kind": "site_page", "missing": false, "url": "https://effectivetypescript.com/2023/05/31/jsdoc-repeat"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T03:17:59.218336+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3f022ea078a4f0841ac84dc11abf7678dd5f65e6963b1eff895699c93c69eb93", "fetched_at": "2026-08-28T04:05:43.207418+00:00", "kind": "readme", "missing": false, "url": "https://github.com/danvk/effective-typescript"}, {"content_hash": "e109b2286494b2b1f8d7b3a0e13c7cc7aac407afa9d5beec63553eb0cfc48165", "fetched_at": "2026-08-29T10:57:23.104570+00:00", "kind": "homepage", "missing": false, "url": "https://effectivetypescript.com"}, {"content_hash": "d0b61f44c12284a3cdf382a809b4f75267d1f84b0790c4d49b00bae5e52c788b", "fetched_at": "2026-08-29T10:57:23.115169+00:00", "kind": "site_page", "missing": false, "url": "https://effectivetypescript.com/2023/05/31/jsdoc-repeat"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:05:43.207418+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:05:43.207418+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:05:43.207418+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T03:17:59.218336+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3f022ea078a4f0841ac84dc11abf7678dd5f65e6963b1eff895699c93c69eb93", "fetched_at": "2026-08-28T04:05:43.207418+00:00", "kind": "readme", "missing": false, "url": "https://github.com/danvk/effective-typescript"}, {"content_hash": "e109b2286494b2b1f8d7b3a0e13c7cc7aac407afa9d5beec63553eb0cfc48165", "fetched_at": "2026-08-29T10:57:23.104570+00:00", "kind": "homepage", "missing": false, "url": "https://effectivetypescript.com"}, {"content_hash": "d0b61f44c12284a3cdf382a809b4f75267d1f84b0790c4d49b00bae5e52c788b", "fetched_at": "2026-08-29T10:57:23.115169+00:00", "kind": "site_page", "missing": false, "url": "https://effectivetypescript.com/2023/05/31/jsdoc-repeat"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:05:43.207418+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:05:43.207418+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T03:17:59.218336+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3f022ea078a4f0841ac84dc11abf7678dd5f65e6963b1eff895699c93c69eb93", "fetched_at": "2026-08-28T04:05:43.207418+00:00", "kind": "readme", "missing": false, "url": "https://github.com/danvk/effective-typescript"}, {"content_hash": "e109b2286494b2b1f8d7b3a0e13c7cc7aac407afa9d5beec63553eb0cfc48165", "fetched_at": "2026-08-29T10:57:23.104570+00:00", "kind": "homepage", "missing": false, "url": "https://effectivetypescript.com"}, {"content_hash": "d0b61f44c12284a3cdf382a809b4f75267d1f84b0790c4d49b00bae5e52c788b", "fetched_at": "2026-08-29T10:57:23.115169+00:00", "kind": "site_page", "missing": false, "url": "https://effectivetypescript.com/2023/05/31/jsdoc-repeat"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:05:43.207418+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:05:43.207418+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:05:43.207418+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T03:17:59.218336+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3f022ea078a4f0841ac84dc11abf7678dd5f65e6963b1eff895699c93c69eb93", "fetched_at": "2026-08-28T04:05:43.207418+00:00", "kind": "readme", "missing": false, "url": "https://github.com/danvk/effective-typescript"}, {"content_hash": "e109b2286494b2b1f8d7b3a0e13c7cc7aac407afa9d5beec63553eb0cfc48165", "fetched_at": "2026-08-29T10:57:23.104570+00:00", "kind": "homepage", "missing": false, "url": "https://effectivetypescript.com"}, {"content_hash": "d0b61f44c12284a3cdf382a809b4f75267d1f84b0790c4d49b00bae5e52c788b", "fetched_at": "2026-08-29T10:57:23.115169+00:00", "kind": "site_page", "missing": false, "url": "https://effectivetypescript.com/2023/05/31/jsdoc-repeat"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:05:43.207418+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:05:43.207418+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T03:17:59.218336+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3f022ea078a4f0841ac84dc11abf7678dd5f65e6963b1eff895699c93c69eb93", "fetched_at": "2026-08-28T04:05:43.207418+00:00", "kind": "readme", "missing": false, "url": "https://github.com/danvk/effective-typescript"}, {"content_hash": "e109b2286494b2b1f8d7b3a0e13c7cc7aac407afa9d5beec63553eb0cfc48165", "fetched_at": "2026-08-29T10:57:23.104570+00:00", "kind": "homepage", "missing": false, "url": "https://effectivetypescript.com"}, {"content_hash": "d0b61f44c12284a3cdf382a809b4f75267d1f84b0790c4d49b00bae5e52c788b", "fetched_at": "2026-08-29T10:57:23.115169+00:00", "kind": "site_page", "missing": false, "url": "https://effectivetypescript.com/2023/05/31/jsdoc-repeat"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T03:17:59.218336+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3f022ea078a4f0841ac84dc11abf7678dd5f65e6963b1eff895699c93c69eb93", "fetched_at": "2026-08-28T04:05:43.207418+00:00", "kind": "readme", "missing": false, "url": "https://github.com/danvk/effective-typescript"}, {"content_hash": "e109b2286494b2b1f8d7b3a0e13c7cc7aac407afa9d5beec63553eb0cfc48165", "fetched_at": "2026-08-29T10:57:23.104570+00:00", "kind": "homepage", "missing": false, "url": "https://effectivetypescript.com"}, {"content_hash": "d0b61f44c12284a3cdf382a809b4f75267d1f84b0790c4d49b00bae5e52c788b", "fetched_at": "2026-08-29T10:57:23.115169+00:00", "kind": "site_page", "missing": false, "url": "https://effectivetypescript.com/2023/05/31/jsdoc-repeat"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T03:17:59.218336+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3f022ea078a4f0841ac84dc11abf7678dd5f65e6963b1eff895699c93c69eb93", "fetched_at": "2026-08-28T04:05:43.207418+00:00", "kind": "readme", "missing": false, "url": "https://github.com/danvk/effective-typescript"}, {"content_hash": "e109b2286494b2b1f8d7b3a0e13c7cc7aac407afa9d5beec63553eb0cfc48165", "fetched_at": "2026-08-29T10:57:23.104570+00:00", "kind": "homepage", "missing": false, "url": "https://effectivetypescript.com"}, {"content_hash": "d0b61f44c12284a3cdf382a809b4f75267d1f84b0790c4d49b00bae5e52c788b", "fetched_at": "2026-08-29T10:57:23.115169+00:00", "kind": "site_page", "missing": false, "url": "https://effectivetypescript.com/2023/05/31/jsdoc-repeat"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T03:17:59.218336+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "3f022ea078a4f0841ac84dc11abf7678dd5f65e6963b1eff895699c93c69eb93", "fetched_at": "2026-08-28T04:05:43.207418+00:00", "kind": "readme", "missing": false, "url": "https://github.com/danvk/effective-typescript"}, {"content_hash": "e109b2286494b2b1f8d7b3a0e13c7cc7aac407afa9d5beec63553eb0cfc48165", "fetched_at": "2026-08-29T10:57:23.104570+00:00", "kind": "homepage", "missing": false, "url": "https://effectivetypescript.com"}, {"content_hash": "d0b61f44c12284a3cdf382a809b4f75267d1f84b0790c4d49b00bae5e52c788b", "fetched_at": "2026-08-29T10:57:23.115169+00:00", "kind": "site_page", "missing": false, "url": "https://effectivetypescript.com/2023/05/31/jsdoc-repeat"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 58, "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": 2510, "days_push": 257, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 49, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}