larskanis/libusb holds a health index of 57 out of 100, placing it in the Moderate band. It scores highest on Sustainability & Governance (62/100) and lowest on AI Readiness (27/100). It was last updated today. A single contributor accounts for most of its recent work.
57
overall / 100
Moderate
Software health index
Metrics are grouped into weighted categories on one standardized 1–100 scale. Overall starts as their weighted mean, calibrated against the distribution of the public record so bands carry percentile meaning; when public evidence triggers the High-Risk Jurisdiction Policy, the rating is adjusted and receives an At Risk ceiling of 34.
57
Exceptional93-100The record's top tier (≈ top 5%); essentially all checked criteria met
Excellent80-92Strong across the board; minor gaps
Good65-79Healthy; gaps are limited and manageable
Moderate50-64Acceptable with notable gaps; review recommended
Weak35-49Material weaknesses across several areas
At Risk20-34Significant weaknesses; adoption warrants caution
Critical1-19Severe problems (abandoned, single-maintainer, no hygiene)
Score profile
Each axis is a category. The shape matters more than the average — a healthy subject fills the whole shape, while a spike-and-crater profile means strength in one dimension is masking risk in another.
The weighted overall 55 is calibrated to 57 on the published index scale (record calibration 2026-08-02).
How well is the repo equipped to be developed and maintained with AI coding agents? Carries a deliberately small weight (4%): agent tooling is a real maintenance signal, but a repository with none can still reach 100/100.
Type-checkable code — Ruby without a type-check config
55/55
Manageable file sizes — 0/39 source files over 60KB
Inputs used
primary_language
Ruby
largest_source_bytes
28,920
source_files_sampled
39
oversized_source_files
0
Key facts
160GitHub stars
5contributors
17commits, last 12 months
0days since last push
26releases
1bus factor
5open issues
RubyGemspackage ecosystems
Data collection warnings
Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
No resolved dependencies carried a version and a supported ecosystem
More detail
Star and fork history 0 ★ / 25 ⇿
0Stars
25Forks
18Releases
When each star and fork was added, collected from GitHub and bucketed by day. Cumulative growth sits directly above the daily additions it is made of, so the two read against each other: steady organic accretion looks nothing like an abrupt, short-lived burst. Where that difference is measurable, it is reported as growth authenticity.
Major 0Minor 6Patch 12
Each point covers 13 days.
OpenSSF Scorecard 4.1 / 10
4.1aggregate
Independent, tool-agnostic security assessment from the open-source OpenSSF Scorecard. Each check rewards a security practice, not a specific vendor's tool. Checks Scorecard could not determine are marked n/a and excluded from the security score (never counted as zero).Scorecard v5.5.0 · 2026-08-03 08:46 UTC
Full resolved dependency set from the GitHub dependency graph: 7 direct and 2 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.
Registry
Package
Version
Relation
RubyGems
bundler
—
direct
RubyGems
ffi
—
direct
RubyGems
mini_portile2
—
direct
RubyGems
ostruct
—
direct
RubyGems
rake-compiler
—
direct
RubyGems
rake-compiler-dock
—
direct
RubyGems
yard
—
direct
RubyGems
eventmachine
—
indirect
RubyGems
minitest
—
indirect
Dependency advisories not assessed
Advisory matching could not run for this report: No resolved dependencies carried a version and a supported ecosystem
Raw JSON report machine-readable
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"body": ".. as soon as a device handle is assigned to make sure, that libusb_free_transfer is called before libusb_exit.\nThe transfer is originally not bound to a context, but when it was used to send a packet, it references the device in use until libusb_free_transfer is called.\n\nThis avoids warnings about still referenced devices kind of:\n libusb: warning [libusb_exit] device <BUS>.<DEV> still referenced",
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"body": "since that raises warnings by libusb that there are remaining references.",
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"headline": "Fix Context reference in hotplug device",
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"headline": "Update Eventmachine support for ruby-3.x",
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"headline": "Re-add Argument error acidently removed",
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"headline": "Fix some cases in our test suite",
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"headline": "Fix warning about frozen String literal",
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"committed_at": "2024-04-15T12:11:33Z",
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"oid": "634e1a6238cf8abee1842b1224879e10a86c55d2",
"body": "Either by Context#exit or by the GC.\nAnd ensure, that two calls doesn't harm.\nAnd raise an error, if not all references are unref'd.",
"is_bot": false,
"headline": "Ensure the LIBUSB::Context is freed only once",
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"body": "Instead of repeating the code.",
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"headline": "Unify Context referencing GCs into ContextReference",
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"oid": "6bd542b5b01a56bbd7e6b29a4cb80711d5b00d93",
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"is_bot": false,
"headline": "Use unpack1 where possible",
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"author_login": "larskanis",
"committed_at": "2024-04-13T20:46:10Z",
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"oid": "147bea4c402aa6fd8313597423e780c558a52f25",
"body": "Since this is what we test in the CI.",
"is_bot": false,
"headline": "Raise minimum ruby version to 2.5.0",
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"headline": "Bump VERSION to 0.7.0",
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"committed_at": "2024-04-13T20:41:45Z",
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"oid": "0dc9b61741d4552c48f5cc84d883321a6b78d783",
"body": "Add BOS platform descriptor new in libusb-1.0.27",
"is_bot": false,
"headline": "Merge pull request #49 from larskanis/add-platform-desc",
"author_name": "Lars Kanis",
"author_login": "larskanis",
"committed_at": "2024-04-13T17:10:06Z",
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"oid": "08c0915e0de71d8d54b023060f031817b7a3c539",
"body": "This is the only one of the new USB-3.2 BOS descriptors that libusb supports natively.\n\nAs an extension to libusb-1-0.27 this patch adds at least the enums for all USB-3.2-V1.1 spec, not just the BT_PLATFORM_DESCRIPTOR.",
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"headline": "Add BOS platform descriptor new in libusb-1.0.27",
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"committed_at": "2024-04-13T16:34:12Z",
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"oid": "59e79c1f6e9ebf75b8e38a14f4b35f563bab4576",
"body": "Add reference counter for LIBUSB::Context usage",
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"headline": "Merge pull request #47 from larskanis/ref-context",
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"author_login": "larskanis",
"committed_at": "2024-04-13T12:13:30Z",
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"body": "The reference counter is increased on every object that is bound to a libusb context.\nIf the context is freed before any object that is bound to a context, then the call to `libusb_exit` is postponed to the last unreferening object.\nThat avoids segfaults caused by logging through the context when ot\n[…]\nlizer.\nThis is because we can not easily pass a ctx pointer to the ManagedStruct release method.\n\nThe Call::Transfer is independent from the context and doesn't need the reference counting.\n\nFixes #46",
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"headline": "Add reference counter for LIBUSB::Context usage",
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"body": "The bmAttributes member is defined as uint8_t not uint32_t.\n\nFixes #48",
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"headline": "Fix struct member size in Bos::SsUsbDeviceCapability",
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"body": "CI: Add an extra run with and without system libusb",
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"headline": "Merge pull request #44 from larskanis/endisable-libusb",
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"headline": "CI: Use ruby-3.0 to avoid bundler/rubygems version mismatch",
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"oid": "7519cef7f0f84c59c9611ab34ce35560077bf25e",
"body": "It fails due to a bug in mini_portile2 / JRuby:\n\n```\nRunning 'configure' for libusb 1.0.27... ERROR. Please review logs to see what happened:\n----- contents of 'D:/jruby-9.4.6.0/lib/ruby/gems/shared/gems/libusb-0.6.4/ext/tmp/x86_64-w64-mingw32/ports/libusb/1.0.27/configure.log' -----\nconfigure: error: unrecognized option: `--prefix\\=D:/jruby-9.4.6.0/lib/ruby/gems/shared/gems/libusb-0.6.4/ports/x86_64-w64-mingw32/libusb/1.0.27'\nTry `./configure --help' for more information\n```",
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"headline": "Disable JRuby on Windows with inline build of libusb",
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"author_login": "larskanis",
"committed_at": "2024-04-12T16:35:11Z",
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"body": "So that it's not executed in CI, since the CI doesn't provide enough USB to run it.",
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"headline": "Move test_log_callback to context tests",
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"body": "It fails to install libusb package of msys2.",
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"headline": "CI: Don't test JRuby on Windows with system-libusb",
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"headline": "CI: Add extconf option to job name",
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"oid": "7f122279a876c0d3d8723b211b0abd3ca18bca8d",
"body": "Otherwise it fails on Macos like so:\n\n[\"make\", \"DESTDIR=\", \"sitearchdir=./.gem.20240310-958-frab35\", \"sitelibdir=./.gem.20240310-958-frab35\", \"install\"]\ncp -r \"/Users/runner/.rubies/jruby-9.4.6.0/lib/ruby/gems/shared/gems/libusb-0.6.4/ports/x86_64-apple-darwin21.6.0/libusb/1.0.27\"/*/* \"/Users/runner/.rubies/jruby-9.4.6.0/lib/ruby/3.1/site_ruby\"\ncp: /Users/runner/.rubies/jruby-9.4.6.0/lib/ruby/3.1/site_ruby is not a directory\nmake: *** [install] Error 1",
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"headline": "Create the RUBYARCHDIR if not exist",
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"headline": "CI: Add an extra run with and without system libusb",
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"body": "It's not our fault, so that it's just deactivated for now.",
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"headline": "CI: JRuby on Windows doesn't call the libusb configure script right",
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"oid": "737484d1b2fe3ed9484cc2f5cdd9ee8a3cdb716b",
"body": "In therory libusb_dev_mem_alloc shouldn't provide a pointer unless zero-copy-memory is supported by the linux kernel.\nBut in practice this has been a repeating cause of issues, since some kernels don't handle these transfers.\nSo it's better to enable it on request only.\n\nFor instance older raspberry pi kernels didn't handle zero-copy-memory.",
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"headline": "Make ZeroCopyMemory an opt-in rather then enforcing it",
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"body": "This circular reference blocked all objects referenced by a LIBUSB::Transfer to be released.",
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"body": "So far LIBUSB::Context instances had to be released explicit by Context#exit , but were not freed by the GC.",
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"body": "CI: Update appveyor script",
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"headline": "Merge pull request #43 from larskanis/larskanis-patch-1",
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"body": "test/test_libusb.rb:66: warning: ambiguity between regexp and two divisions: wrap regexp in parentheses or add a space after `/' operator",
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"headline": "Avoid Warnings about missing parentheses",
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"headline": "Merge branch 'master' of https://github.com/larskanis/libusb",
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"body": "Wrap new functions introduced in libusb-1.0.27",
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"headline": "Merge pull request #42 from larskanis/libusb-1.0.27",
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"oid": "1dadb67b906a31acefa406c5ff1486cfb05367de",
"body": "Build and run binary gems in CI",
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"headline": "Merge pull request #37 from larskanis/ci",
"author_name": "Lars Kanis",
"author_login": "larskanis",
"committed_at": "2024-03-05T14:16:53Z",
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"is_bot": false,
"headline": "CI: Update node-script versions due to deprecation warnings",
"author_name": "Lars Kanis",
"author_login": "larskanis",
"committed_at": "2024-03-05T14:14:41Z",
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"oid": "37563602ef2d5fbb3c8ae64c64af3395e47441f6",
"body": "- Bump ruby versions\n- Print logs in case of errors while building binary gems\n- Don't use bundler cache for gem testing, because this would enable $pwd/vendor and wouldn't use the installed libusb gem.\n- Remove platforms not (yet) supported by binary gems\n- Download libusb tar before \"rake gem\"\n- Use a dedicated Gemfile to avoid in-tree lib, but use installed libusb.gem\n- Run cmpile task only explicit, so that CI runs with binary gems don't compile.",
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"headline": "Update CI to test gem install and gem use with source and binary gems",
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"author_login": "larskanis",
"committed_at": "2024-03-05T14:10:13Z",
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},
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"body": null,
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"headline": "restrict yard version to avoid insecure versions",
"author_name": "Lars Kanis",
"author_login": "larskanis",
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"headline": "Add a missing build directory to \"rake clean\"",
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"committed_at": "2024-03-04T20:04:05Z",
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"headline": "Add tests for Context#wrap_sys_device",
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"oid": "1f91637843e5dc3ef3c31c99bb73d6cd72faab8f",
"body": "Introduced in libusb-1.0.27 as libusb_get_max_alt_packet_size()",
"is_bot": false,
"headline": "Add LIBUSB::Device.max_alt_packet_size",
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"oid": "a0123c9f971e74246790fd2152594c96c965ef20",
"body": "Also add patches to fix libusb_set_option behavior reg. log callback",
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"headline": "Add tests for new functions of libusb-1.0.27-rc1",
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"headline": "Add global set_option and set_options",
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"oid": "aa859ffd5c821316d0af7c2dfffef08015cff196",
"body": "They are:\n- libusb_init_context\n- libusb_set_log_cb\n- libusb_wrap_sys_device",
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"headline": "Add support for new functions of libusb-1.0.27",
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"oid": "5aae32edd98ee1c5956638ab1180c6ee8289eeb8",
"body": "Cancel USB transfers on any exceptions",
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"headline": "Merge pull request #41 from larskanis/cancel-exception",
"author_name": "Lars Kanis",
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"committed_at": "2023-12-18T10:53:11Z",
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{
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{
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{
"code": "license_spdx",
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{
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{
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"points": 10,
"status": "met",
"details": [],
"max_points": 10
},
{
"key": "dependency_update_tool",
"name": "Dependency-Update-Tool",
"detail": "no update tool detected",
"points": 0,
"status": "missed",
"details": [],
"max_points": 7.5
},
{
"key": "fuzzing",
"name": "Fuzzing",
"detail": "project is not fuzzed",
"points": 0,
"status": "missed",
"details": [],
"max_points": 5
},
{
"key": "license",
"name": "License",
"detail": "license file detected",
"points": 2.5,
"status": "met",
"details": [],
"max_points": 2.5
},
{
"key": "maintained",
"name": "Maintained",
"detail": "14 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10",
"points": 7.5,
"status": "met",
"details": [],
"max_points": 7.5
},
{
"key": "packaging",
"name": "Packaging",
"detail": "packaging workflow not detected",
"points": 0,
"status": "excluded",
"details": [
{
"code": "no_data",
"params": {}
}
],
"max_points": 5
},
{
"key": "pinned_dependencies",
"name": "Pinned-Dependencies",
"detail": "dependency not pinned by hash detected -- score normalized to 0",
"points": 0,
"status": "missed",
"details": [],
"max_points": 5
},
{
"key": "sast",
"name": "SAST",
"detail": "SAST tool is not run on all commits -- score normalized to 0",
"points": 0,
"status": "missed",
"details": [],
"max_points": 5
},
{
"key": "security_policy",
"name": "Security-Policy",
"detail": "security policy file not detected",
"points": 0,
"status": "missed",
"details": [],
"max_points": 5
},
{
"key": "signed_releases",
"name": "Signed-Releases",
"detail": "no releases found",
"points": 0,
"status": "excluded",
"details": [
{
"code": "no_data",
"params": {}
}
],
"max_points": 7.5
},
{
"key": "token_permissions",
"name": "Token-Permissions",
"detail": "detected GitHub workflow tokens with excessive permissions",
"points": 0,
"status": "missed",
"details": [],
"max_points": 7.5
},
{
"key": "vulnerabilities",
"name": "Vulnerabilities",
"detail": "0 existing vulnerabilities detected",
"points": 7.5,
"status": "met",
"details": [],
"max_points": 7.5
}
]
},
{
"key": "high_risk_jurisdiction_exposure",
"band": "exceptional",
"name": "High-Risk Jurisdiction Exposure",
"note": "Only high-confidence self-published location evidence affects this multiplier. Ambiguous matches are review-only; country evidence is not proof of nationality, citizenship, legal registration, malicious intent, or sanctions status.",
"notes": [
{
"code": "jurisdiction_evidence_limits",
"params": {}
}
],
"value": 100,
"inputs": {
"meaning": "self-published location evidence; not nationality or citizenship",
"red_flag": false,
"exposures": [],
"policy_countries": [
"Russia",
"Iran",
"North Korea"
],
"commit_weight_rule": {
"min_commits": 50,
"min_commit_share": 0.1
},
"review_only_matches": 0,
"below_threshold_exposures": [],
"assessed_self_published_locations": 12
},
"components": [
{
"key": "policy_exposure_multiplier",
"name": "Policy exposure multiplier",
"detail": "no confirmed policy-scope location match",
"points": 100,
"status": "met",
"details": [
{
"code": "jurisdiction_no_match",
"params": {}
}
],
"max_points": 100
}
]
}
],
"description": "Are visible security and supply-chain practices strong, with no malicious dependency and no unresolved high-risk jurisdiction exposure?"
},
{
"key": "ai_readiness",
"band": "at_risk",
"name": "AI Readiness",
"value": 27,
"weight": 0.04,
"metrics": [
{
"key": "ai_agent_context",
"band": "critical",
"name": "Agent context & guidance",
"note": null,
"notes": [],
"value": 19,
"inputs": {
"has_llms_txt": false,
"legible_history_share": 0.35,
"agent_instruction_files": [],
"agent_instruction_max_bytes": null
},
"components": [
{
"key": "agent_instructions",
"name": "Agent instructions",
"detail": "no CLAUDE.md / AGENTS.md / editor rules",
"points": 0,
"status": "missed",
"details": [
{
"code": "no_agent_instructions",
"params": {}
}
],
"max_points": 45
},
{
"key": "machine_readable_docs_llms_txt",
"name": "Machine-readable docs (llms.txt)",
"detail": null,
"points": 0,
"status": "missed",
"details": [],
"max_points": 15
},
{
"key": "legible_commit_history",
"name": "Legible commit history",
"detail": "35 of 100 human commits state their intent (structured subject or explanatory body)",
"points": 18.7,
"status": "partial",
"details": [
{
"code": "legible_history",
"params": {
"legible": 35,
"sampled": 100
}
}
],
"max_points": 40
}
]
},
{
"key": "ai_verify_loop",
"band": "at_risk",
"name": "Verify loop (build / test / typecheck)",
"note": null,
"notes": [],
"value": 22,
"inputs": {
"has_nix": false,
"has_tests": true,
"lockfiles": [],
"has_dockerfile": false,
"typed_language": false,
"bootstrap_files": [],
"has_devcontainer": false,
"has_linter_config": false,
"typecheck_configs": [],
"agent_commit_share": 0,
"toolchain_manifests": [],
"dependency_bot_commit_share": 0
},
"components": [
{
"key": "one_command_bootstrap",
"name": "One-command bootstrap",
"detail": null,
"points": 0,
"status": "missed",
"details": [],
"max_points": 18
},
{
"key": "automated_tests",
"name": "Automated tests",
"detail": null,
"points": 22,
"status": "met",
"details": [],
"max_points": 22
},
{
"key": "lint_format_config",
"name": "Lint / format config",
"detail": null,
"points": 0,
"status": "missed",
"details": [],
"max_points": 11
},
{
"key": "static_type_checking",
"name": "Static type checking",
"detail": null,
"points": 0,
"status": "missed",
"details": [],
"max_points": 11
},
{
"key": "reproducible_environment",
"name": "Reproducible environment",
"detail": null,
"points": 0,
"status": "missed",
"details": [],
"max_points": 10
},
{
"key": "demonstrated_agent_practice",
"name": "Demonstrated agent practice",
"detail": "no agent-authored commits among the last 100",
"points": 0,
"status": "missed",
"details": [
{
"code": "no_agent_authored_commits",
"params": {
"sampled": 100
}
}
],
"max_points": 10
},
{
"key": "automated_maintenance",
"name": "Automated maintenance",
"detail": "no automated dependency updates observed",
"points": 0,
"status": "missed",
"details": [
{
"code": "no_dependency_automation",
"params": {}
}
],
"max_points": 8
},
{
"key": "openssf_scorecard_pinned_dependencies",
"name": "OpenSSF Scorecard: Pinned-Dependencies",
"detail": "dependency not pinned by hash detected -- score normalized to 0",
"points": 0,
"status": "missed",
"details": [],
"max_points": 10
}
]
},
{
"key": "ai_code_legibility",
"band": "moderate",
"name": "Code legibility for models",
"note": null,
"notes": [],
"value": 55,
"inputs": {
"primary_language": "Ruby",
"largest_source_bytes": 28920,
"source_files_sampled": 39,
"oversized_source_files": 0
},
"components": [
{
"key": "type_checkable_code",
"name": "Type-checkable code",
"detail": "Ruby without a type-check config",
"points": 0,
"status": "missed",
"details": [
{
"code": "no_typecheck_config_language",
"params": {
"language": "Ruby"
}
}
],
"max_points": 45
},
{
"key": "manageable_file_sizes",
"name": "Manageable file sizes",
"detail": "0/39 source files over 60KB",
"points": 55,
"status": "met",
"details": [
{
"code": "oversized_source_files",
"params": {
"kb": 60,
"sampled": 39,
"oversized": 0
}
}
],
"max_points": 55
}
]
}
],
"description": "How well is the repo equipped to be developed and maintained with AI coding agents? Carries a deliberately small weight: agent tooling is a real maintenance signal, but its absence must never gate the top of the scale (calibration saturates at raw 91, so 100/100 remains reachable with AI Readiness at zero)."
}
],
"classification": {
"top": [
"library",
"application"
],
"labels": [
"library",
"cli"
],
"scores": {
"cli": 10,
"library": 14
},
"primary": "library",
"evidence": [
{
"tier": "declared",
"label": "cli",
"source": "gem.executables",
"weight": 10
},
{
"tier": "declared",
"label": "library",
"source": "gem.gemspec",
"weight": 8
},
{
"tier": "distribution",
"label": "library",
"source": "registry:rubygems",
"weight": 6
}
],
"artifacts": [
{
"path": "libusb.gemspec",
"labels": [
"cli",
"library"
],
"ecosystem": "rubygems"
}
],
"confidence": "high",
"host_extension": false,
"runs_as_process": true,
"consumed_by_code": true
},
"metrics_version": "2.5.0"
},
"warnings": [
"Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token",
"No resolved dependencies carried a version and a supported ecosystem"
],
"report_type": "repository",
"generated_at": "2026-08-03T08:46:47.337772Z",
"schema_version": "0.30.0",
"badge_url": "https://raw.githubusercontent.com/inspect-software/badges/main/v1/l/larskanis/libusb.svg",
"full_name": "larskanis/libusb",
"license_state": "standard",
"license_spdx": "LGPL-3.0"
}
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Scores are signals, not warranties. They reflect publicly visible practices on GitHub — not a code audit, and not a security guarantee.
Missing data is excluded and weights renormalized, never scored as zero. Methodology is versioned and open: metrics v2.5.0, schema v0.30.0 — full methodology · metrics wiki.
