{"adoption": {"forks": 181, "observed_at": "2026-08-28T04:04:20.829786+00:00", "stars": 1316}, "canonical_url": "https://ross.abutalabs.com/products/knightos", "card": {"archived": false, "artifact_type": "application", "description": "OS for z80 calculators", "domain": ["operating-systems", "embedded-systems", "education"], "enriched": true, "function": ["embedded", "developer-tools"], "health_score": 20, "homepage": null, "language": "Assembly", "license": "NOASSERTION", "license_family": "other", "maturity": "maintenance", "member_repos": ["KnightOS/KnightOS"], "name": "KnightOS/KnightOS", "platform": ["embedded", "cross-platform"], "pushed_at": "2021-05-02T06:26:08+00:00", "repo": "KnightOS/KnightOS", "stars": 1316, "tags": ["z80", "ti-calculator", "unix-like", "custom-kernel", "assembly", "userspace", "rom"], "topics": ["knightos", "calculator", "assembly", "custom-kernel", "operating-system", "z80"], "urls": [], "use_cases": ["install a custom operating system on a TI-84+ calculator", "build a Unix-like OS image for a z80 calculator", "run a third-party OS on a TI-83 Plus in an emulator", "create an upgrade file to flash onto a TI calculator", "develop against a custom kernel for z80 calculators", "replace the stock TI-OS with an open-source alternative"], "what_it_is": "KnightOS is a third-party Unix-like operating system for TI z80-based graphing calculators, built on a custom kernel with an official userspace that ties together packages, settings, and upgrade files. This repository orchestrates the build of complete ROM and upgrade images for supported TI-73/83+/84+ calculator models using the KnightOS SDK.", "when_to_avoid": ["you need a modern, actively developed OS - the latest release dates to 2021 and development is largely dormant", "you have a calculator outside the supported TI z80 models, such as TI-Nspire or TI-89", "you just want calculator programs or games that run under the stock TI-OS"], "when_to_choose": ["you own a supported TI z80 calculator (TI-73, TI-83+, TI-84+ family) and want a Unix-like alternative OS", "you want to tinker with operating system development on constrained z80 hardware", "you want to build custom ROM or upgrade images from source with the KnightOS SDK"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/knightos", "repo": "KnightOS/KnightOS", "role": "main", "score": 32}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:04:20.829786+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T04:48:23.112096+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dd747383d02e3cd53c5507ca428c12e94761daf4ba5dfc30292f3c5c803f70c4", "fetched_at": "2026-08-28T04:04:20.829786+00:00", "kind": "readme", "missing": false, "url": "https://github.com/KnightOS/KnightOS"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:04:20.829786+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T04:48:23.112096+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dd747383d02e3cd53c5507ca428c12e94761daf4ba5dfc30292f3c5c803f70c4", "fetched_at": "2026-08-28T04:04:20.829786+00:00", "kind": "readme", "missing": false, "url": "https://github.com/KnightOS/KnightOS"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T04:48:23.112096+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dd747383d02e3cd53c5507ca428c12e94761daf4ba5dfc30292f3c5c803f70c4", "fetched_at": "2026-08-28T04:04:20.829786+00:00", "kind": "readme", "missing": false, "url": "https://github.com/KnightOS/KnightOS"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:04:20.829786+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:04:20.829786+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:04:20.829786+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T04:48:23.112096+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dd747383d02e3cd53c5507ca428c12e94761daf4ba5dfc30292f3c5c803f70c4", "fetched_at": "2026-08-28T04:04:20.829786+00:00", "kind": "readme", "missing": false, "url": "https://github.com/KnightOS/KnightOS"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:04:20.829786+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:04:20.829786+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T04:48:23.112096+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dd747383d02e3cd53c5507ca428c12e94761daf4ba5dfc30292f3c5c803f70c4", "fetched_at": "2026-08-28T04:04:20.829786+00:00", "kind": "readme", "missing": false, "url": "https://github.com/KnightOS/KnightOS"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:04:20.829786+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:04:20.829786+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:04:20.829786+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T04:48:23.112096+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dd747383d02e3cd53c5507ca428c12e94761daf4ba5dfc30292f3c5c803f70c4", "fetched_at": "2026-08-28T04:04:20.829786+00:00", "kind": "readme", "missing": false, "url": "https://github.com/KnightOS/KnightOS"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:04:20.829786+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:04:20.829786+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T04:48:23.112096+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dd747383d02e3cd53c5507ca428c12e94761daf4ba5dfc30292f3c5c803f70c4", "fetched_at": "2026-08-28T04:04:20.829786+00:00", "kind": "readme", "missing": false, "url": "https://github.com/KnightOS/KnightOS"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T04:48:23.112096+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dd747383d02e3cd53c5507ca428c12e94761daf4ba5dfc30292f3c5c803f70c4", "fetched_at": "2026-08-28T04:04:20.829786+00:00", "kind": "readme", "missing": false, "url": "https://github.com/KnightOS/KnightOS"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T04:48:23.112096+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dd747383d02e3cd53c5507ca428c12e94761daf4ba5dfc30292f3c5c803f70c4", "fetched_at": "2026-08-28T04:04:20.829786+00:00", "kind": "readme", "missing": false, "url": "https://github.com/KnightOS/KnightOS"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T04:48:23.112096+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "dd747383d02e3cd53c5507ca428c12e94761daf4ba5dfc30292f3c5c803f70c4", "fetched_at": "2026-08-28T04:04:20.829786+00:00", "kind": "readme", "missing": false, "url": "https://github.com/KnightOS/KnightOS"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 0, "longevity": 100, "rhythm": 35}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": ["no_releases", "no_license"], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 5096, "days_push": 1949, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 32, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}