Public record
Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-08-28 04:05 UTC

arrow-kt / arrow

The perfect companion for your Kotlin journey - Inspired by functional, data-oriented and concurrent programming

KotlinCustom license★ 6,580 stars⑂ 472 forkssince Mar 2017View on GitHub ↗

arrow-kt/arrow holds a health index of 93 out of 100, placing it in the Exceptional band. It scores highest on Vitality (95/100) and lowest on Security (60/100). It was last updated today. 4 contributors account for most of its recent work.

93
overall / 100
Exceptional

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.

93
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)
VitalityCommunity &AdoptionSustainability &GovernanceEngineeringQualitySecurityAI Readiness

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 79 is calibrated to 93 on the published index scale (record calibration 2026-08-02).

Ownership

ArrowOrganization
197 followers55 public repossince Jun 2017

This repository is backed by an organization — shared, accountable stewardship that can outlive any single maintainer.

Metrics by category

Vitality

Is the project alive — is code being written and are releases shipping?

95Exceptional · 21% of overall
How it's scored
36/36Push recencylast push 0 days ago
28.4/36Commit cadence41/52 weeks with commits
18/18Commit volume196 commits in the last year
10/10OpenSSF Scorecard: Maintained30 commit(s) and 2 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year196
human_commit_share0.41
days_since_last_push0
active_weeks_last_year41

Release discipline

100Exceptional
How it's scored
27/27Ships releases79 releases published
36/36Release recencylatest release 37 days ago
27/27Release cadencea release every ~29.1 days
0/10OpenSSF Scorecard: Signed-Releasesno data
Inputs used
releases_count79
latest_release_tag2.3.0-alpha.4
releases_from_tagsno
days_since_latest_release37
mean_days_between_releases29.1
Excluded from scoring (no data or not applicable): OpenSSF Scorecard: Signed-Releases. Remaining weights renormalized.

Community & Adoption

Does the project have users, downloads, attention, and a welcoming setup for contributors?

86Excellent · 17% of overall
How it's scored
60/60Stars6,580 stars
22.3/25Forks472 forks
10.8/15Watchers87 watchers
Inputs used
forks472
stars6,580
watchers87
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history
How it's scored
22.5/22.5README
16.9/22.5Licenselicense file present, not a recognized license
18/18CONTRIBUTING guide
13.5/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges5
has_contributingyes
has_issue_templateno
has_code_of_conductyes
readme_badge_servicesshields.io
has_pull_request_templateno

Sustainability & Governance

Will the project survive its people — bus factor, responsiveness, who backs it, and package upkeep?

80Excellent · 23% of overall
How it's scored
43.2/54Bus factor4 contributor(s) cover half of all commits
18.7/22.5Commit distributiontop contributor authored 17% of commits
13.5/13.5Contributor breadth99 contributors
10/10OpenSSF Scorecard: Contributorsproject has 31 contributing companies or organizations
Inputs used
bus_factor4
contributors_sampled99
top_contributor_share0.171
How it's scored
41.2/42Issue resolution98% of issues closed
26.6/30PR acceptance2,402/2,708 decided PRs merged
0/13Newcomer PR acceptanceno first-time contributor's PR decided in 30d
4.5/15OpenSSF Scorecard: Code-ReviewFound 4/11 approved changesets -- score normalized to 3
Inputs used
merged_prs2,402
open_issues22
closed_issues1,062
prs_merged_7d0
prs_decided_7d0
prs_merged_30d0
prs_decided_30d0
issue_closed_ratio0.98
closed_unmerged_prs306
first_time_authors_30d0
first_time_prs_merged_30d0
first_time_prs_decided_30d0
Excluded from scoring (no data or not applicable): Newcomer PR acceptance. Remaining weights renormalized.
How it's scored
30/30Ownership backingorganization-owned
0/20Verified domain
16.5/25Owner reach197 followers of arrow-kt
24.7/25Track record55 public repos, account ~9 yr old
Inputs used
followers197
owner_typeOrganization
is_verifiedno
owner_loginarrow-kt
public_repos55
account_age_days3,360

Engineering Quality

Are baseline engineering and documentation practices in place?

70Good · 19% of overall
How it's scored
24/24CI workflows4 workflow(s)
24/24Tests present
0/16Linter config
0/9.6Pre-commit hooks
6.4/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests30 out of 30 merged PRs checked by a CI test -- score normalized to 10
Inputs used
has_ciyes
has_testsyes
has_editorconfigyes
has_linter_configno
has_precommit_configno
How it's scored
30/30README
0/25Documentation directory
15/15Documentation / homepage sitehttp://arrow-kt.io
10/10Repository description
10/10Topics18 topics
0/10Wiki
Inputs used
topicsfunctional-programming, kotlin-library, monads, functional-data-structure, kotlin, fp-types, for-comprehension, optics, polymorphism, typed-lambda-calculus, typeclasses, arrow, delimited-continuations, continuations, kotlin-libraries, coroutines, kotlin-dsl, hacktoberfest
has_wikino
homepagehttp://arrow-kt.io
docs_sitehttp://arrow-kt.io
has_readmeyes
has_docs_dirno
has_descriptionyes

Security

Are visible security and supply-chain practices strong, without unresolved high-risk jurisdiction exposure?

60Moderate · 16% of overall
How it's scored
5.2/7.5Binary-Artifactsbinaries present in source code
0/7.5Branch-Protectionno data
2.5/2.5CI-Tests30 out of 30 merged PRs checked by a CI test -- score normalized to 10
0/2.5CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
2.2/7.5Code-ReviewFound 4/11 approved changesets -- score normalized to 3
2.5/2.5Contributorsproject has 31 contributing companies or organizations
10/10Dangerous-Workflowno dangerous workflow patterns detected
7.5/7.5Dependency-Update-Toolupdate tool detected
0/5Fuzzingproject is not fuzzed
2.2/2.5Licenselicense file detected
7.5/7.5Maintained30 commit(s) and 2 issue activity found in the last 90 days -- score normalized to 10
5/5Packagingpackaging workflow detected
0/5Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
0/5SASTSAST tool is not run on all commits -- score normalized to 0
0/5Security-Policysecurity policy file not detected
0/7.5Signed-Releasesno data
0/7.5Token-Permissionsdetected GitHub workflow tokens with excessive permissions
0/7.5Vulnerabilities50 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate5
Excluded from scoring (no data or not applicable): Branch-Protection, Signed-Releases. Remaining weights renormalized.

Dependency advisories

100Exceptional
How it's scored
35/35Direct dependencies free of known advisoriesno direct dependency carries a known advisory
0/25Indirect dependencies free of known advisoriestransitive set not separable from development and test dependencies in this scope
0/40No advisories left outstandingno advisory carries a publication date
Inputs used
sourceosv
advisories81
affected_packages36
assessed_packages393
unassessed_packages0
affected_by_severitycritical 2, high 25, moderate 6, low 3
direct_affected_packages0
Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 393 resolved dependencies against OSV. This repository publishes no package the index resolves, so the repository dependency graph was assessed instead. That graph mixes development and test pins with shipped dependencies, so only the declared runtime dependencies are scored; transitive findings are reported as context and excluded from the score. Reachability is not analyzed.

AI Readiness

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.

72Good · 4% of overall
How it's scored
0/45Agent instructionsno CLAUDE.md / AGENTS.md / editor rules
15/15Machine-readable docs (llms.txt)llms.txt served by the project website (https://kotlinlang.org/llms.txt)
40/40Legible commit history38 of 41 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtyes
llms_txt_urlhttps://kotlinlang.org/llms.txt
legible_history_share0.927
agent_instruction_files
agent_instruction_max_bytes
How it's scored
12.6/18One-command bootstraparrow-libs/core/arrow-annotations/build.gradle.kts, arrow-libs/core/arrow-atomic/build.gradle.kts, arrow-libs/core/arrow-autoclose/build.gradle.kts (toolchain convention, no task runner)
22/22Automated tests
0/11Lint / format config
11/11Static type checkingKotlin (statically typed)
10/10Reproducible environmentlockfile
0/10Demonstrated agent practiceno agent-authored commits among the last 100
8/8Automated maintenance59 of the last 100 commits are automated dependency updates
0/10OpenSSF Scorecard: Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
Inputs used
has_nixno
has_testsyes
lockfilesyarn.lock
has_dockerfileno
typed_languageyes
bootstrap_files
has_devcontainerno
has_linter_configno
typecheck_configs
agent_commit_share0
toolchain_manifestsarrow-libs/core/arrow-annotations/build.gradle.kts, arrow-libs/core/arrow-atomic/build.gradle.kts, arrow-libs/core/arrow-autoclose/build.gradle.kts, arrow-libs/core/arrow-cache4k/build.gradle.kts, arrow-libs/core/arrow-core-high-arity/build.gradle.kts, arrow-libs/core/arrow-core/build.gradle.kts, arrow-libs/core/arrow-eval/build.gradle.kts, arrow-libs/core/arrow-exception-utils/build.gradle.kts, arrow-libs/core/arrow-functions/build.gradle.kts, arrow-libs/core/arrow-platform/build.gradle.kts, arrow-libs/fx/arrow-collectors/build.gradle.kts, arrow-libs/fx/arrow-fx-coroutines/build.gradle.kts, arrow-libs/fx/arrow-fx-stm/build.gradle.kts, arrow-libs/integrations/arrow-core-jackson/build.gradle.kts, arrow-libs/integrations/arrow-core-jackson2/build.gradle.kts, arrow-libs/integrations/arrow-core-result4k/build.gradle.kts, arrow-libs/integrations/arrow-core-retrofit/build.gradle.kts, arrow-libs/integrations/arrow-core-serialization/build.gradle.kts, arrow-libs/integrations/arrow-raise-ktor-server-resources/build.gradle.kts, arrow-libs/integrations/arrow-raise-ktor-server/build.gradle.kts, arrow-libs/integrations/arrow-resilience-ktor-client/build.gradle.kts, arrow-libs/optics/arrow-optics-compiler-plugin/build.gradle.kts, arrow-libs/optics/arrow-optics-compose/build.gradle.kts, arrow-libs/optics/arrow-optics-ksp-plugin/build.gradle.kts, arrow-libs/optics/arrow-optics-plugin/build.gradle.kts, arrow-libs/optics/arrow-optics-reflect/build.gradle.kts, arrow-libs/optics/arrow-optics/build.gradle.kts, arrow-libs/resilience/arrow-resilience/build.gradle.kts, arrow-libs/stack/build.gradle.kts, arrow-libs/suspendapp/suspendapp-ktor/build.gradle.kts, arrow-libs/suspendapp/suspendapp-test-app/build.gradle.kts, arrow-libs/suspendapp/suspendapp-test-runner/build.gradle.kts, arrow-libs/suspendapp/suspendapp/build.gradle.kts, arrow-libs/version-catalog/build.gradle.kts, build.gradle.kts, buildSrc/build.gradle.kts, gradle-test/jvmOnly/build.gradle.kts, gradle-test/multiplatform/build.gradle.kts
dependency_bot_commit_share0.59
How it's scored
45/45Type-checkable codeKotlin (statically typed)
54.9/55Manageable file sizes1/758 source files over 60KB
Inputs used
primary_languageKotlin
largest_source_bytes240,182
source_files_sampled758
oversized_source_files1
How it's scored
0/40API schema (OpenAPI/GraphQL/proto)not applicable to this kind of software
0/20MCP servernot applicable to this kind of software
40/40Runnable examplesexample, examples
Inputs used
example_dirsexample, examples
has_mcp_signalno
api_schema_files
interfaces_expected_of
Excluded from scoring (no data or not applicable): API schema (OpenAPI/GraphQL/proto), MCP server. Remaining weights renormalized.

Key facts

6,580GitHub stars
99contributors
196commits, last 12 months
0days since last push
79releases
4bus factor
22open issues
Mavenpackage ecosystems

Data collection warnings

  • Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token

More detail

Star and fork history 0 ★ / 472 ⇿
0Stars
472Forks
75Releases

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.

010020030040050047092017-032021-112026-06
Major 2Minor 14Patch 41

Each point covers 9 days.

OpenSSF Scorecard 5.0 / 10
5.0aggregate

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 · 2026-08-28 04:05 UTC

7Binary-Artifactsbinaries present in source code
n/aBranch-Protectioninternal error: error during branchesHandler.setup: internal error: some github tokens can't read classic branch protection rules: https://github.com/ossf/scorecard-action/blob/main/docs/authentication/fine-grained-auth-token.md
10CI-Tests30 out of 30 merged PRs checked by a CI test -- score normalized to 10
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
3Code-ReviewFound 4/11 approved changesets -- score normalized to 3
10Contributorsproject has 31 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
10Dependency-Update-Toolupdate tool detected
0Fuzzingproject is not fuzzed
9Licenselicense file detected
10Maintained30 commit(s) and 2 issue activity found in the last 90 days -- score normalized to 10
10Packagingpackaging workflow detected
0Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
0SASTSAST tool is not run on all commits -- score normalized to 0
0Security-Policysecurity policy file not detected
n/aSigned-Releasesno releases found
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
0Vulnerabilities50 existing vulnerabilities detected
All dependencies 393

Full resolved dependency set from the GitHub dependency graph: 0 direct and 393 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

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npmlocate-path6.0.0indirect
npmlodash4.17.21indirect
npmlog-symbols4.1.0indirect
npmlog4js6.7.0indirect
npmlog4js6.9.1indirect
npmlru-cache10.4.3indirect
npmmath-intrinsics1.1.0indirect
npmmedia-typer0.3.0indirect
npmmerge-stream2.0.0indirect
npmmime2.6.0indirect
npmmime-db1.52.0indirect
npmmime-types2.1.35indirect
npmminimatch3.1.2indirect
npmminimatch9.0.4indirect
npmminimatch9.0.5indirect
npmminimist1.2.6indirect
npmminimist1.2.7indirect
npmminimist1.2.8indirect
npmminipass7.1.2indirect
npmmkdirp0.5.6indirect
npmmocha11.7.5indirect
npmms2.0.0indirect
npmms2.1.2indirect
npmms2.1.3indirect
npmnegotiator0.6.3indirect
npmneo-async2.6.2indirect
npmnode-releases2.0.19indirect
npmnode-releases2.0.21indirect
npmnormalize-path3.0.0indirect
npmobject-assign4.1.1indirect
npmobject-inspect1.12.2indirect
npmobject-inspect1.13.4indirect
npmon-finished2.3.0indirect
npmon-finished2.4.1indirect
npmonce1.4.0indirect
npmp-limit2.3.0indirect
npmp-limit3.1.0indirect
npmp-locate4.1.0indirect
npmp-locate5.0.0indirect
npmp-try2.2.0indirect
npmpackage-json-from-dist1.0.1indirect
npmparseurl1.3.3indirect
npmpath-exists4.0.0indirect
npmpath-is-absolute1.0.1indirect
npmpath-key3.1.1indirect
npmpath-parse1.0.7indirect
npmpath-scurry1.11.1indirect
npmpicocolors1.1.1indirect
npmpicomatch2.3.1indirect
npmpkg-dir4.2.0indirect
npmpunycode1.4.1indirect
npmqjobs1.2.0indirect
npmqs6.10.3indirect
npmqs6.13.0indirect
npmrandombytes2.1.0indirect
npmrange-parser1.2.1indirect
npmraw-body2.5.1indirect
npmraw-body2.5.2indirect
npmreaddirp3.6.0indirect
npmreaddirp4.1.2indirect
npmrechoir0.8.0indirect
npmrequire-directory2.1.1indirect
npmrequire-from-string2.0.2indirect
npmrequires-port1.0.0indirect
npmresolve1.22.10indirect
npmresolve1.22.2indirect
npmresolve-cwd3.0.0indirect
npmresolve-from5.0.0indirect
npmrfdc1.3.0indirect
npmrfdc1.4.1indirect
npmrimraf3.0.2indirect
npmsafe-buffer5.2.1indirect
npmsafe-regex-test1.1.0indirect
npmsafer-buffer2.1.2indirect
npmschema-utils4.3.2indirect
npmschema-utils4.3.3indirect
npmserialize-javascript6.0.2indirect
npmsetprototypeof1.2.0indirect
npmshallow-clone3.0.1indirect
npmshebang-command2.0.0indirect
npmshebang-regex3.0.0indirect
npmside-channel1.0.4indirect
npmside-channel1.1.0indirect
npmside-channel-list1.0.0indirect
npmside-channel-map1.0.1indirect
npmside-channel-weakmap1.0.2indirect
npmsignal-exit4.1.0indirect
npmsocket.io4.7.5indirect
npmsocket.io4.8.1indirect
npmsocket.io-adapter2.5.4indirect
npmsocket.io-adapter2.5.5indirect
npmsocket.io-parser4.2.4indirect
npmsource-map0.6.1indirect
npmsource-map-js1.0.2indirect
npmsource-map-js1.2.1indirect
npmsource-map-loader5.0.0indirect
npmsource-map-support0.5.21indirect
npmstatuses1.5.0indirect
npmstatuses2.0.1indirect
npmstreamroller3.1.3indirect
npmstreamroller3.1.5indirect
npmstring-width4.2.3indirect
npmstring-width5.1.2indirect
npmstring-width-cjs4.2.3indirect
npmstrip-ansi6.0.1indirect
npmstrip-ansi7.1.0indirect
npmstrip-ansi7.1.2indirect
npmstrip-ansi-cjs6.0.1indirect
npmstrip-json-comments3.1.1indirect
npmsupports-color7.2.0indirect
npmsupports-color8.1.1indirect
npmsupports-preserve-symlinks-flag1.0.0indirect
npmtapable2.2.1indirect
npmtapable2.3.0indirect
npmtapable2.3.3indirect
npmterser5.43.1indirect
npmterser5.44.0indirect
npmterser-webpack-plugin5.3.14indirect
npmtmp0.2.1indirect
npmtmp0.2.5indirect
npmto-regex-range5.0.1indirect
npmtoidentifier1.0.1indirect
npmtype-is1.6.18indirect
npmua-parser-js0.7.32indirect
npmua-parser-js0.7.41indirect
npmundici-types7.13.0indirect
npmuniversalify0.1.2indirect
npmunpipe1.0.0indirect
npmupdate-browserslist-db1.1.3indirect
npmutils-merge1.0.1indirect
npmvary1.1.2indirect
npmvoid-elements2.0.1indirect
npmwatchpack2.4.1indirect
npmwatchpack2.4.4indirect
npmwebpack5.101.3indirect
npmwebpack-cli6.0.1indirect
npmwebpack-merge4.2.2indirect
npmwebpack-merge6.0.1indirect
npmwebpack-sources3.3.3indirect
npmwhich1.3.1indirect
npmwhich2.0.2indirect
npmwildcard2.0.1indirect
npmworkerpool9.3.3indirect
npmworkerpool9.3.4indirect
npmwrap-ansi7.0.0indirect
npmwrap-ansi8.1.0indirect
npmwrap-ansi-cjs7.0.0indirect
npmwrappy1.0.2indirect
npmws8.11.0indirect
npmws8.17.1indirect
npmws8.20.1indirect
npmy18n5.0.8indirect
npmyargs16.2.0indirect
npmyargs17.7.2indirect
npmyargs-parser20.2.9indirect
npmyargs-parser21.1.1indirect
npmyargs-unparser2.0.0indirect
npmyocto-queue0.1.0indirect
Dependency advisories 36

This repository publishes no package the index resolves, so its own dependency graph was assessed — 393 packages, which also include development and test pins that never ship: 36 carry known advisories, of which 0 are direct.

PackageVersionRelationSeverityAdvisoriesFixed in
flatted3.2.7indirectcritical23.4.2
flatted3.3.3indirectcritical23.4.2
body-parser1.20.0indirecthigh22.3.0
brace-expansion1.1.11indirecthigh55.0.9
brace-expansion1.1.12indirecthigh45.0.9
brace-expansion2.0.1indirecthigh55.0.9
brace-expansion2.0.2indirecthigh45.0.9
braces3.0.2indirecthigh13.0.3
cross-spawn7.0.3indirecthigh17.0.5
engine.io6.5.4indirecthigh16.6.7
engine.io6.6.4indirecthigh16.6.7
fast-uri3.1.0indirecthigh54.1.2
glob10.4.5indirecthigh111.1.0
js-yaml4.1.0indirecthigh44.3.1
lodash4.17.21indirecthigh34.18.0
minimatch3.1.2indirecthigh310.2.3
minimatch9.0.4indirecthigh310.2.3
minimatch9.0.5indirecthigh310.2.3
picomatch2.3.1indirecthigh24.0.4
serialize-javascript6.0.2indirecthigh27.0.5
socket.io-parser4.2.4indirecthigh24.2.7
tmp0.2.1indirecthigh20.2.6
tmp0.2.5indirecthigh10.2.6
ua-parser-js0.7.32indirecthigh11.0.33
ws8.11.0indirecthigh38.21.0
ws8.17.1indirecthigh28.21.0
ws8.20.1indirecthigh18.21.0
ajv8.17.1indirectmoderate18.18.0
diff7.0.0indirectmoderate18.0.3
follow-redirects1.15.1indirectmoderate31.16.0
follow-redirects1.15.11indirectmoderate11.16.0
qs6.10.3indirectmoderate26.14.2
qs6.13.0indirectmoderate36.15.2
body-parser1.20.3indirectlow12.3.0
cookie0.4.2indirectlow10.7.0
webpack5.101.3indirectlow25.104.1

An advisory means the version recorded in the dependency graph falls inside an advisory’s affected range. Reachability is not analysed, and the graph includes development and test pins — a finding may concern tooling rather than shipped software.

Raw JSON report machine-readable

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Spotted something off in this report, or have thoughts to share? Wrong measurements, missed tooling, ideas, questions — anything is welcome. Every message is read and gets a response.

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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 v2.10.0, schema v0.34.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statistics.