{"adoption": {"forks": 31, "observed_at": "2026-08-28T04:04:58.076930+00:00", "stars": 1523}, "canonical_url": "https://ross.abutalabs.com/products/watt", "card": {"archived": false, "artifact_type": "library", "description": "Runtime for executing procedural macros as WebAssembly", "domain": ["developer-tools", "compilers", "programming-languages"], "enriched": true, "function": ["compiler", "wasm", "developer-tools"], "health_score": 78, "homepage": null, "language": "Rust", "license": "Apache-2.0", "license_family": "permissive", "maturity": "active", "member_repos": ["dtolnay/watt"], "name": "dtolnay/watt", "platform": ["rust", "wasm", "cross-platform"], "pushed_at": "2026-07-19T00:26:44+00:00", "repo": "dtolnay/watt", "stars": 1523, "tags": ["proc-macro", "webassembly-runtime", "build-time", "rust-macros", "sandboxing"], "topics": [], "urls": [], "use_cases": ["speed up compilation of crates that depend on procedural macros", "run proc macros in a sandboxed, 100% safe-code environment", "make macro expansion deterministic for build systems", "distribute proc macros as precompiled Wasm bytecode", "reduce dependency compile times for syn/quote-heavy macro crates"], "what_it_is": "Watt is a Rust runtime for executing procedural macros that have been compiled ahead-of-time to WebAssembly. It lets downstream users run macros in a small, dependency-free Wasm interpreter instead of compiling the macro and its dependencies from source.", "when_to_avoid": ["you need proc macro APIs or dependencies not supported by the Wasm runtime", "your project is small and macro compile time is not a bottleneck", "you need tight integration with the latest unstable proc_macro features"], "when_to_choose": ["your proc macro and its dependencies are slow to compile and many crates depend on it", "you want strong isolation guarantees so macros can only transform tokens", "you need deterministic macro behavior visible to the build system"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/watt", "repo": "dtolnay/watt", "role": "main", "score": 65}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:04:58.076930+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T04:31:44.532254+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "973bcbfa7e82260b3aebbf100387b3b236714a998dcf442a5d9c748e6e06d0b6", "fetched_at": "2026-08-28T04:04:58.076930+00:00", "kind": "readme", "missing": false, "url": "https://github.com/dtolnay/watt"}, {"content_hash": "1dda24cbf792e55befdf2150dc949843a66fda336c8a59b8eb704b14f4c65a59", "fetched_at": "2026-08-29T11:34:29.481506+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/watt"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:04:58.076930+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T04:31:44.532254+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "973bcbfa7e82260b3aebbf100387b3b236714a998dcf442a5d9c748e6e06d0b6", "fetched_at": "2026-08-28T04:04:58.076930+00:00", "kind": "readme", "missing": false, "url": "https://github.com/dtolnay/watt"}, {"content_hash": "1dda24cbf792e55befdf2150dc949843a66fda336c8a59b8eb704b14f4c65a59", "fetched_at": "2026-08-29T11:34:29.481506+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/watt"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T04:31:44.532254+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "973bcbfa7e82260b3aebbf100387b3b236714a998dcf442a5d9c748e6e06d0b6", "fetched_at": "2026-08-28T04:04:58.076930+00:00", "kind": "readme", "missing": false, "url": "https://github.com/dtolnay/watt"}, {"content_hash": "1dda24cbf792e55befdf2150dc949843a66fda336c8a59b8eb704b14f4c65a59", "fetched_at": "2026-08-29T11:34:29.481506+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/watt"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:04:58.076930+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:04:58.076930+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:04:58.076930+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T04:31:44.532254+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "973bcbfa7e82260b3aebbf100387b3b236714a998dcf442a5d9c748e6e06d0b6", "fetched_at": "2026-08-28T04:04:58.076930+00:00", "kind": "readme", "missing": false, "url": "https://github.com/dtolnay/watt"}, {"content_hash": "1dda24cbf792e55befdf2150dc949843a66fda336c8a59b8eb704b14f4c65a59", "fetched_at": "2026-08-29T11:34:29.481506+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/watt"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:04:58.076930+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:04:58.076930+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T04:31:44.532254+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "973bcbfa7e82260b3aebbf100387b3b236714a998dcf442a5d9c748e6e06d0b6", "fetched_at": "2026-08-28T04:04:58.076930+00:00", "kind": "readme", "missing": false, "url": "https://github.com/dtolnay/watt"}, {"content_hash": "1dda24cbf792e55befdf2150dc949843a66fda336c8a59b8eb704b14f4c65a59", "fetched_at": "2026-08-29T11:34:29.481506+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/watt"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:04:58.076930+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:04:58.076930+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:04:58.076930+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T04:31:44.532254+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "973bcbfa7e82260b3aebbf100387b3b236714a998dcf442a5d9c748e6e06d0b6", "fetched_at": "2026-08-28T04:04:58.076930+00:00", "kind": "readme", "missing": false, "url": "https://github.com/dtolnay/watt"}, {"content_hash": "1dda24cbf792e55befdf2150dc949843a66fda336c8a59b8eb704b14f4c65a59", "fetched_at": "2026-08-29T11:34:29.481506+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/watt"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:04:58.076930+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:04:58.076930+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T04:31:44.532254+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "973bcbfa7e82260b3aebbf100387b3b236714a998dcf442a5d9c748e6e06d0b6", "fetched_at": "2026-08-28T04:04:58.076930+00:00", "kind": "readme", "missing": false, "url": "https://github.com/dtolnay/watt"}, {"content_hash": "1dda24cbf792e55befdf2150dc949843a66fda336c8a59b8eb704b14f4c65a59", "fetched_at": "2026-08-29T11:34:29.481506+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/watt"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T04:31:44.532254+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "973bcbfa7e82260b3aebbf100387b3b236714a998dcf442a5d9c748e6e06d0b6", "fetched_at": "2026-08-28T04:04:58.076930+00:00", "kind": "readme", "missing": false, "url": "https://github.com/dtolnay/watt"}, {"content_hash": "1dda24cbf792e55befdf2150dc949843a66fda336c8a59b8eb704b14f4c65a59", "fetched_at": "2026-08-29T11:34:29.481506+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/watt"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T04:31:44.532254+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "973bcbfa7e82260b3aebbf100387b3b236714a998dcf442a5d9c748e6e06d0b6", "fetched_at": "2026-08-28T04:04:58.076930+00:00", "kind": "readme", "missing": false, "url": "https://github.com/dtolnay/watt"}, {"content_hash": "1dda24cbf792e55befdf2150dc949843a66fda336c8a59b8eb704b14f4c65a59", "fetched_at": "2026-08-29T11:34:29.481506+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/watt"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T04:31:44.532254+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "973bcbfa7e82260b3aebbf100387b3b236714a998dcf442a5d9c748e6e06d0b6", "fetched_at": "2026-08-28T04:04:58.076930+00:00", "kind": "readme", "missing": false, "url": "https://github.com/dtolnay/watt"}, {"content_hash": "1dda24cbf792e55befdf2150dc949843a66fda336c8a59b8eb704b14f4c65a59", "fetched_at": "2026-08-29T11:34:29.481506+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/watt"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 93, "longevity": 100, "rhythm": 8}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": [], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 2516, "days_push": 46, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 65, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}