{"adoption": {"forks": 223, "observed_at": "2026-08-28T04:07:39.251479+00:00", "stars": 3040}, "canonical_url": "https://ross.abutalabs.com/products/proxy", "card": {"archived": true, "artifact_type": "library", "description": "Proxy: Next Generation Polymorphism in C++", "domain": ["programming-languages", "developer-tools", "cross-platform"], "enriched": true, "function": ["programming-language", "developer-tools"], "health_score": 10, "homepage": "https://microsoft.github.io/proxy/spec/", "language": "C++", "license": "MIT", "license_family": "permissive", "maturity": "maintenance", "member_repos": ["microsoft/proxy"], "name": "microsoft/proxy", "platform": ["cpp", "cross-platform", "windows"], "pushed_at": "2026-01-29T09:21:48+00:00", "repo": "microsoft/proxy", "stars": 3040, "tags": ["cpp20", "header-only", "polymorphism", "duck-typing", "single-header", "type-erasure", "no-inheritance", "linux", "macos"], "topics": ["cpp", "cpp20", "header-only", "library", "cross-platform", "polymorphism", "duck-typing", "single-header"], "urls": [], "use_cases": ["replace inheritance-based polymorphism in C++ with a faster alternative", "write polymorphic code in C++ as easily as in Java or C#", "type-erase arbitrary types without intrusive base classes", "use polymorphism in freestanding or embedded environments", "manage lifetimes of polymorphic objects safely", "build traits-like abstractions similar to Rust in C++"], "what_it_is": "Proxy is a header-only C++20 library from Microsoft that provides next-generation polymorphism without inheritance, using pointer-based facades and compile-time facade builders. It is portable, non-intrusive, and freestanding, suitable even for embedded or kernel-level code.", "when_to_avoid": ["your codebase must compile with pre-C++20 compilers", "you prefer classic OOP inheritance hierarchies and virtual functions", "you need a maintained upstream - this Microsoft repo is archived; use ngcpp/proxy instead"], "when_to_choose": ["you need polymorphism without inheritance or intrusive modifications to types", "you target C++20 and want a portable, header-only solution", "performance matters and you want to avoid virtual-call overhead and heap allocation where possible", "you work in freestanding environments like kernels or embedded systems"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/proxy", "repo": "microsoft/proxy", "role": "main", "score": 10}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:07:39.251479+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-29T18:46:50.968165+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a2cdafdcd368240a2d12ae4733a19e26356bae16abb118422fd611b67d27a44a", "fetched_at": "2026-08-28T04:07:39.251479+00:00", "kind": "readme", "missing": false, "url": "https://github.com/microsoft/proxy"}, {"content_hash": "59e4846f833e925c8177ae625e65ed3b8b1cc7305224c222cb8f831b08474395", "fetched_at": "2026-08-29T09:44:19.452996+00:00", "kind": "homepage", "missing": false, "url": "https://microsoft.github.io/proxy/spec/"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:07:39.251479+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-29T18:46:50.968165+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a2cdafdcd368240a2d12ae4733a19e26356bae16abb118422fd611b67d27a44a", "fetched_at": "2026-08-28T04:07:39.251479+00:00", "kind": "readme", "missing": false, "url": "https://github.com/microsoft/proxy"}, {"content_hash": "59e4846f833e925c8177ae625e65ed3b8b1cc7305224c222cb8f831b08474395", "fetched_at": "2026-08-29T09:44:19.452996+00:00", "kind": "homepage", "missing": false, "url": "https://microsoft.github.io/proxy/spec/"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-29T18:46:50.968165+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a2cdafdcd368240a2d12ae4733a19e26356bae16abb118422fd611b67d27a44a", "fetched_at": "2026-08-28T04:07:39.251479+00:00", "kind": "readme", "missing": false, "url": "https://github.com/microsoft/proxy"}, {"content_hash": "59e4846f833e925c8177ae625e65ed3b8b1cc7305224c222cb8f831b08474395", "fetched_at": "2026-08-29T09:44:19.452996+00:00", "kind": "homepage", "missing": false, "url": "https://microsoft.github.io/proxy/spec/"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:07:39.251479+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:07:39.251479+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:07:39.251479+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-29T18:46:50.968165+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a2cdafdcd368240a2d12ae4733a19e26356bae16abb118422fd611b67d27a44a", "fetched_at": "2026-08-28T04:07:39.251479+00:00", "kind": "readme", "missing": false, "url": "https://github.com/microsoft/proxy"}, {"content_hash": "59e4846f833e925c8177ae625e65ed3b8b1cc7305224c222cb8f831b08474395", "fetched_at": "2026-08-29T09:44:19.452996+00:00", "kind": "homepage", "missing": false, "url": "https://microsoft.github.io/proxy/spec/"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:07:39.251479+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:07:39.251479+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-29T18:46:50.968165+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a2cdafdcd368240a2d12ae4733a19e26356bae16abb118422fd611b67d27a44a", "fetched_at": "2026-08-28T04:07:39.251479+00:00", "kind": "readme", "missing": false, "url": "https://github.com/microsoft/proxy"}, {"content_hash": "59e4846f833e925c8177ae625e65ed3b8b1cc7305224c222cb8f831b08474395", "fetched_at": "2026-08-29T09:44:19.452996+00:00", "kind": "homepage", "missing": false, "url": "https://microsoft.github.io/proxy/spec/"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:07:39.251479+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:07:39.251479+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:07:39.251479+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-29T18:46:50.968165+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a2cdafdcd368240a2d12ae4733a19e26356bae16abb118422fd611b67d27a44a", "fetched_at": "2026-08-28T04:07:39.251479+00:00", "kind": "readme", "missing": false, "url": "https://github.com/microsoft/proxy"}, {"content_hash": "59e4846f833e925c8177ae625e65ed3b8b1cc7305224c222cb8f831b08474395", "fetched_at": "2026-08-29T09:44:19.452996+00:00", "kind": "homepage", "missing": false, "url": "https://microsoft.github.io/proxy/spec/"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:07:39.251479+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:07:39.251479+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-29T18:46:50.968165+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a2cdafdcd368240a2d12ae4733a19e26356bae16abb118422fd611b67d27a44a", "fetched_at": "2026-08-28T04:07:39.251479+00:00", "kind": "readme", "missing": false, "url": "https://github.com/microsoft/proxy"}, {"content_hash": "59e4846f833e925c8177ae625e65ed3b8b1cc7305224c222cb8f831b08474395", "fetched_at": "2026-08-29T09:44:19.452996+00:00", "kind": "homepage", "missing": false, "url": "https://microsoft.github.io/proxy/spec/"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-29T18:46:50.968165+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a2cdafdcd368240a2d12ae4733a19e26356bae16abb118422fd611b67d27a44a", "fetched_at": "2026-08-28T04:07:39.251479+00:00", "kind": "readme", "missing": false, "url": "https://github.com/microsoft/proxy"}, {"content_hash": "59e4846f833e925c8177ae625e65ed3b8b1cc7305224c222cb8f831b08474395", "fetched_at": "2026-08-29T09:44:19.452996+00:00", "kind": "homepage", "missing": false, "url": "https://microsoft.github.io/proxy/spec/"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-29T18:46:50.968165+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a2cdafdcd368240a2d12ae4733a19e26356bae16abb118422fd611b67d27a44a", "fetched_at": "2026-08-28T04:07:39.251479+00:00", "kind": "readme", "missing": false, "url": "https://github.com/microsoft/proxy"}, {"content_hash": "59e4846f833e925c8177ae625e65ed3b8b1cc7305224c222cb8f831b08474395", "fetched_at": "2026-08-29T09:44:19.452996+00:00", "kind": "homepage", "missing": false, "url": "https://microsoft.github.io/proxy/spec/"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-29T18:46:50.968165+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "a2cdafdcd368240a2d12ae4733a19e26356bae16abb118422fd611b67d27a44a", "fetched_at": "2026-08-28T04:07:39.251479+00:00", "kind": "readme", "missing": false, "url": "https://github.com/microsoft/proxy"}, {"content_hash": "59e4846f833e925c8177ae625e65ed3b8b1cc7305224c222cb8f831b08474395", "fetched_at": "2026-08-29T09:44:19.452996+00:00", "kind": "homepage", "missing": false, "url": "https://microsoft.github.io/proxy/spec/"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 64, "longevity": 100, "rhythm": 38}, "computed_at": "2026-09-02T17:46:02.011165+00:00", "flags": ["archived"], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 1556, "days_push": 216, "days_rel": 332, "gap_med": 58, "n_releases_24m": 8}, "score": 10, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}