{"adoption": {"forks": 536, "observed_at": "2026-08-28T04:07:05.231643+00:00", "stars": 2625}, "canonical_url": "https://ross.abutalabs.com/products/keystone-assembler-engine", "card": {"archived": false, "artifact_type": "library", "description": "Keystone assembler framework: Core (Arm, Arm64, Hexagon, Mips, PowerPC, Sparc, SystemZ & X86) + bindings", "domain": ["security", "reverse-engineering", "developer-tools", "compilers"], "enriched": true, "function": ["compiler", "security", "reverse-engineering", "developer-tools"], "health_score": 76, "homepage": "http://www.keystone-engine.org", "language": "C++", "license": "GPL-2.0", "license_family": "copyleft", "maturity": "active", "member_repos": ["keystone-engine/keystone", "keystone-engine/keypatch"], "name": "Keystone Assembler Engine", "platform": ["windows", "bsd", "cross-platform", "python", "go", "rust", "jvm", "dotnet", "ruby"], "pushed_at": "2026-07-18T21:28:10+00:00", "repo": "keystone-engine/keystone", "stars": 2625, "tags": ["assembler", "multi-architecture", "llvm-based", "arm", "arm64", "x86", "mips", "sparc", "powerpc", "risc-v", "evm", "hexagon", "systemz", "bindings", "keystone", "linux", "macos", "nodejs"], "topics": ["assembler", "framework", "security", "reverse-engineering", "arm", "arm64", "x86", "sparc", "mips", "powerpc", "systemz", "hexagon", "x86-64"], "urls": [{"kind": "homepage", "url": "http://www.keystone-engine.org"}], "use_cases": ["assemble machine code for arm64 from assembly text", "patch binary instructions during reverse engineering", "generate shellcode for x86-64 in a security tool", "assemble mips or powerpc instructions in an emulator or fuzzer", "integrate an assembler into a python or rust exploit-development toolkit", "assemble risc-v or evm instructions programmatically"], "what_it_is": "Keystone is a lightweight multi-platform, multi-architecture assembler framework implemented in C/C++ with bindings for many languages. It supports assembling instructions for Arm, Arm64, Hexagon, Mips, PowerPC, Sparc, SystemZ, X86, RISC-V, and Ethereum VM, and is based on LLVM.", "when_to_avoid": ["you need a full toolchain with linking and object-file output rather than instruction assembly", "you need a disassembler - use Capstone instead", "your project cannot accept GPL-2.0 licensing and you cannot obtain a commercial license"], "when_to_choose": ["you need a lightweight, thread-safe assembler library with a simple architecture-neutral API", "you need multi-architecture assembly from C/C++ or via bindings in Python, Go, Rust, Java, and more", "you are building reverse-engineering, binary-patching, or exploit-development tooling"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/repos/keystone-engine/keystone", "repo": "keystone-engine/keystone", "role": "main", "score": 65}, {"path": "/repos/keystone-engine/keypatch", "repo": "keystone-engine/keypatch", "role": "plugin", "score": 23}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:07:05.231643+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T02:19:49.074443+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "c84ce91bf8d2cb8878d364c436b91b1bc56a5790a9702cdf86a57b21461e05d6", "fetched_at": "2026-08-28T04:07:05.231643+00:00", "kind": "readme", "missing": false, "url": "https://github.com/keystone-engine/keystone"}, {"content_hash": "8b7f255aa4011a54c95365e76e5075ba1433f4878def251dd035dbc9f61c6151", "fetched_at": "2026-08-29T10:02:50.011202+00:00", "kind": "homepage", "missing": false, "url": "http://www.keystone-engine.org"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:07:05.231643+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T02:19:49.074443+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "c84ce91bf8d2cb8878d364c436b91b1bc56a5790a9702cdf86a57b21461e05d6", "fetched_at": "2026-08-28T04:07:05.231643+00:00", "kind": "readme", "missing": false, "url": "https://github.com/keystone-engine/keystone"}, {"content_hash": "8b7f255aa4011a54c95365e76e5075ba1433f4878def251dd035dbc9f61c6151", "fetched_at": "2026-08-29T10:02:50.011202+00:00", "kind": "homepage", "missing": false, "url": "http://www.keystone-engine.org"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T02:19:49.074443+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "c84ce91bf8d2cb8878d364c436b91b1bc56a5790a9702cdf86a57b21461e05d6", "fetched_at": "2026-08-28T04:07:05.231643+00:00", "kind": "readme", "missing": false, "url": "https://github.com/keystone-engine/keystone"}, {"content_hash": "8b7f255aa4011a54c95365e76e5075ba1433f4878def251dd035dbc9f61c6151", "fetched_at": "2026-08-29T10:02:50.011202+00:00", "kind": "homepage", "missing": false, "url": "http://www.keystone-engine.org"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:07:05.231643+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:07:05.231643+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:07:05.231643+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T02:19:49.074443+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "c84ce91bf8d2cb8878d364c436b91b1bc56a5790a9702cdf86a57b21461e05d6", "fetched_at": "2026-08-28T04:07:05.231643+00:00", "kind": "readme", "missing": false, "url": "https://github.com/keystone-engine/keystone"}, {"content_hash": "8b7f255aa4011a54c95365e76e5075ba1433f4878def251dd035dbc9f61c6151", "fetched_at": "2026-08-29T10:02:50.011202+00:00", "kind": "homepage", "missing": false, "url": "http://www.keystone-engine.org"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:07:05.231643+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:07:05.231643+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T02:19:49.074443+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "c84ce91bf8d2cb8878d364c436b91b1bc56a5790a9702cdf86a57b21461e05d6", "fetched_at": "2026-08-28T04:07:05.231643+00:00", "kind": "readme", "missing": false, "url": "https://github.com/keystone-engine/keystone"}, {"content_hash": "8b7f255aa4011a54c95365e76e5075ba1433f4878def251dd035dbc9f61c6151", "fetched_at": "2026-08-29T10:02:50.011202+00:00", "kind": "homepage", "missing": false, "url": "http://www.keystone-engine.org"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:07:05.231643+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:07:05.231643+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:07:05.231643+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T02:19:49.074443+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "c84ce91bf8d2cb8878d364c436b91b1bc56a5790a9702cdf86a57b21461e05d6", "fetched_at": "2026-08-28T04:07:05.231643+00:00", "kind": "readme", "missing": false, "url": "https://github.com/keystone-engine/keystone"}, {"content_hash": "8b7f255aa4011a54c95365e76e5075ba1433f4878def251dd035dbc9f61c6151", "fetched_at": "2026-08-29T10:02:50.011202+00:00", "kind": "homepage", "missing": false, "url": "http://www.keystone-engine.org"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:07:05.231643+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:07:05.231643+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T02:19:49.074443+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "c84ce91bf8d2cb8878d364c436b91b1bc56a5790a9702cdf86a57b21461e05d6", "fetched_at": "2026-08-28T04:07:05.231643+00:00", "kind": "readme", "missing": false, "url": "https://github.com/keystone-engine/keystone"}, {"content_hash": "8b7f255aa4011a54c95365e76e5075ba1433f4878def251dd035dbc9f61c6151", "fetched_at": "2026-08-29T10:02:50.011202+00:00", "kind": "homepage", "missing": false, "url": "http://www.keystone-engine.org"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T02:19:49.074443+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "c84ce91bf8d2cb8878d364c436b91b1bc56a5790a9702cdf86a57b21461e05d6", "fetched_at": "2026-08-28T04:07:05.231643+00:00", "kind": "readme", "missing": false, "url": "https://github.com/keystone-engine/keystone"}, {"content_hash": "8b7f255aa4011a54c95365e76e5075ba1433f4878def251dd035dbc9f61c6151", "fetched_at": "2026-08-29T10:02:50.011202+00:00", "kind": "homepage", "missing": false, "url": "http://www.keystone-engine.org"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T02:19:49.074443+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "c84ce91bf8d2cb8878d364c436b91b1bc56a5790a9702cdf86a57b21461e05d6", "fetched_at": "2026-08-28T04:07:05.231643+00:00", "kind": "readme", "missing": false, "url": "https://github.com/keystone-engine/keystone"}, {"content_hash": "8b7f255aa4011a54c95365e76e5075ba1433f4878def251dd035dbc9f61c6151", "fetched_at": "2026-08-29T10:02:50.011202+00:00", "kind": "homepage", "missing": false, "url": "http://www.keystone-engine.org"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T02:19:49.074443+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "c84ce91bf8d2cb8878d364c436b91b1bc56a5790a9702cdf86a57b21461e05d6", "fetched_at": "2026-08-28T04:07:05.231643+00:00", "kind": "readme", "missing": false, "url": "https://github.com/keystone-engine/keystone"}, {"content_hash": "8b7f255aa4011a54c95365e76e5075ba1433f4878def251dd035dbc9f61c6151", "fetched_at": "2026-08-29T10:02:50.011202+00:00", "kind": "homepage", "missing": false, "url": "http://www.keystone-engine.org"}], "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": 3779, "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}}