Public record
Software health reportschema 0.31.0 · metrics 2.10.0 · 2026-08-13 02:15 UTC

mapbox / supercluster

A very fast geospatial point clustering library for browsers and Node.

JavaScriptISC★ 2,345 stars⑂ 303 forkssince Dec 2015View on GitHub ↗
KindLibraryhow this is determined
#clustering#algorithm#computational-geometry#javascript#maps

mapbox/supercluster holds a health index of 84 out of 100, placing it in the Excellent band. It scores highest on Community & Adoption (90/100) and lowest on AI Readiness (40/100). It was last updated 2 days ago. A single contributor accounts for most of its recent work.

84
overall / 100
Excellent

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.

84
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 71 is calibrated to 84 on the published index scale (record calibration 2026-08-02).

Ownership

MapboxOrganization
2,777 followers866 public repossince Feb 2011

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

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
npmsupercluster9.0.036,206,767272 days agoclusteringgeospatialmarkers

Metrics by category

Vitality

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

70Good · 21% of overall

Development activity

60Moderate
How it's scored
36/36Push recency — last push 2 days ago
3.5/36Commit cadence — 5/52 weeks with commits
10.8/18Commit volume — 15 commits in the last year
10/10OpenSSF Scorecard: Maintained — 15 commit(s) and 6 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year15
human_commit_share0.98
days_since_last_push2
active_weeks_last_year5

Release discipline

84Excellent
How it's scored
27/27Ships releases — 28 releases published
36/36Release recency — latest release 2 days ago
12.6/27Release cadence — a release every ~274.4 days
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count28
latest_release_tagv9.0.0
releases_from_tagsno
days_since_latest_release2
mean_days_between_releases274.4
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?

90Excellent · 17% of overall

Popularity & adoption

87Excellent
How it's scored
54.7/60Stars — 2,345 stars
20.7/25Forks — 303 forks
11.9/15Watchers — 141 watchers
Inputs used
forks303
stars2,345
watchers141
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

85Excellent
How it's scored
22.5/22.5README
22.5/22.5License — recognized license (ISC)
18/18CONTRIBUTING guide
13.5/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges2
has_contributingyes
has_issue_templateno
has_code_of_conductyes
readme_badge_servicesgithub.com, shields.io
has_pull_request_templateno

Ecosystem adoption (downloads)

100Exceptional
How it's scored
80/80Monthly downloads — 36,206,767 downloads/month across npm
0/20Registry dependents — not reported by this ecosystem
Inputs used
packagessupercluster
dependents—
ecosystemsnpm
total_downloads—
monthly_downloads36,206,767
unverified_packages_excluded—
Excluded from scoring (no data or not applicable): Registry dependents. Remaining weights renormalized.

Sustainability & Governance

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

69Good · 23% of overall

Maintainer resilience (bus factor)

32At Risk
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
3.1/22.5Commit distribution — top contributor authored 86% of commits
13.5/13.5Contributor breadth — 20 contributors
6/10OpenSSF Scorecard: Contributors — project has 2 contributing companies or organizations -- score normalized to 6
Inputs used
bus_factor1
contributors_sampled20
top_contributor_share0.862

Issue & PR responsiveness

58Moderate
How it's scored
36.7/42Issue resolution — 87% of issues closed
19.9/30PR acceptance — 47/71 decided PRs merged
0/13Newcomer PR acceptance — 0/3 first-time contributors' PRs merged in 30d
1.5/15OpenSSF Scorecard: Code-Review — Found 2/17 approved changesets -- score normalized to 1
Inputs used
merged_prs47
open_issues23
closed_issues158
prs_merged_7d2
prs_decided_7d4
prs_merged_30d2
prs_decided_30d5
issue_closed_ratio0.873
closed_unmerged_prs24
first_time_authors_30d3
first_time_prs_merged_30d0
first_time_prs_decided_30d3

Ownership & stewardship

100Exceptional
How it's scored
30/30Ownership backing — organization-owned
0/20Verified domain — verified-domain status not read for this organization
24.8/25Owner reach — 2,777 followers of mapbox
25/25Track record — 866 public repos, account ~15 yr old
Inputs used
followers2,777
owner_typeOrganization
is_verified—
owner_loginmapbox
public_repos866
account_age_days5,668
Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable — 1 package(s) on npm
35/35Publish recency — latest publish 2 days ago
20/20Version history — 27 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packagessupercluster
ecosystemsnpm
any_deprecatedno
min_days_since_publish2

Engineering Quality

Are baseline engineering and documentation practices in place?

63Moderate · 19% of overall

Engineering practices

72Good
How it's scored
24/24CI workflows — 1 workflow(s)
24/24Tests present
16/16Linter config — eslint.config.js
0/9.6Pre-commit hooks
0/6.4.editorconfig
8/20OpenSSF Scorecard: CI-Tests — 3 out of 7 merged PRs checked by a CI test -- score normalized to 4
Inputs used
has_ciyes
has_testsyes
has_editorconfigno
has_linter_configyes
has_precommit_configno

Documentation

50Moderate
How it's scored
30/30README
0/25Documentation directory
0/15Documentation / homepage site
10/10Repository description
10/10Topics — 5 topics
0/10Wiki
Inputs used
topicsclustering, algorithm, computational-geometry, javascript, maps
has_wikino
homepage—
docs_site—
has_readmeyes
has_docs_dirno
has_descriptionyes

Security

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

72Good · 16% of overall

Security posture

65Good
How it's scored
7.5/7.5Binary-Artifacts — no binaries found in the repo
4.5/7.5Branch-Protection — branch protection is not maximal on development and all release branches
1/2.5CI-Tests — 3 out of 7 merged PRs checked by a CI test -- score normalized to 4
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
0.8/7.5Code-Review — Found 2/17 approved changesets -- score normalized to 1
1.5/2.5Contributors — project has 2 contributing companies or organizations -- score normalized to 6
10/10Dangerous-Workflow — no dangerous workflow patterns detected
7.5/7.5Dependency-Update-Tool — update tool detected
0/5Fuzzing — project is not fuzzed
2.5/2.5License — license file detected
7.5/7.5Maintained — 15 commit(s) and 6 issue activity found in the last 90 days -- score normalized to 10
0/5Packaging — no data
1.5/5Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 3
3.5/5SAST — SAST tool is not run on all commits -- score normalized to 7
5/5Security-Policy — security policy file detected
0/7.5Signed-Releases — no data
0/7.5Token-Permissions — detected GitHub workflow tokens with excessive permissions
7.5/7.5Vulnerabilities — 0 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate6.5
Excluded from scoring (no data or not applicable): Packaging, Signed-Releases. Remaining weights renormalized.

Dependency advisories

100Exceptional
How it's scored
35/35Direct dependencies free of known advisories — no direct dependency carries a known advisory
25/25Indirect dependencies free of known advisories — no indirect dependency carries a known advisory
0/40No advisories left outstanding — no advisory carries a publication date
Inputs used
sourceosv
advisories0
affected_packages0
assessed_packages1
unassessed_packages0
affected_by_severitynone
direct_affected_packages0
Excluded from scoring (no data or not applicable): No advisories left outstanding. Remaining weights renormalized. Matched the npm:supercluster@9.0.0 runtime dependency closure — what installing the published package pulls in — 1 packages. 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.

40Weak · 4% of overall

Agent context & guidance

13Critical
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
13.1/40Legible commit history — 24 of 98 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share0.245
agent_instruction_files—
agent_instruction_max_bytes—

Verify loop (build / test / typecheck)

54Moderate
How it's scored
0/18One-command bootstrap
22/22Automated tests
11/11Lint / format config — eslint.config.js
0/11Static type checking
10/10Reproducible environment — lockfile
0/10Demonstrated agent practice — no agent-authored commits among the last 100
8/8Automated maintenance — 2 of the last 100 commits are automated dependency updates
3/10OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 3
Inputs used
has_nixno
has_testsyes
lockfilespackage-lock.json
has_dockerfileno
typed_languageno
bootstrap_files—
has_devcontainerno
has_linter_configyes
typecheck_configs—
agent_commit_share0
toolchain_manifests—
dependency_bot_commit_share0.02

Code legibility for models

55Moderate
How it's scored
0/45Type-checkable code — JavaScript without a type-check config
55/55Manageable file sizes — 0/7 source files over 60KB
Inputs used
primary_languageJavaScript
largest_source_bytes18,471
source_files_sampled7
oversized_source_files0

Key facts

2,345GitHub stars
20contributors
15commits, last 12 months
2days since last push
28releases
1bus factor
23open issues
npmpackage ecosystems

Data collection warnings

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

More detail

Star and fork history 0 ★ / 303 ⇿
0Stars
303Forks
25Releases

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.

05010015020025030028242016-012021-042026-06
Major 6Minor 5Patch 14

Each point covers 10 days.

OpenSSF Scorecard 6.5 / 10
6.5aggregate

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 · 2026-08-13 02:14 UTC

10Binary-Artifactsno binaries found in the repo
6Branch-Protectionbranch protection is not maximal on development and all release branches
4CI-Tests3 out of 7 merged PRs checked by a CI test -- score normalized to 4
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
1Code-ReviewFound 2/17 approved changesets -- score normalized to 1
6Contributorsproject has 2 contributing companies or organizations -- score normalized to 6
10Dangerous-Workflowno dangerous workflow patterns detected
10Dependency-Update-Toolupdate tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
10Maintained15 commit(s) and 6 issue activity found in the last 90 days -- score normalized to 10
n/aPackagingpackaging workflow not detected
3Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 3
7SASTSAST tool is not run on all commits -- score normalized to 7
10Security-Policysecurity policy file detected
n/aSigned-Releasesno releases found
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
10Vulnerabilities0 existing vulnerabilities detected
Direct dependencies 1
RegistryPackageVersion constraintManifest
npmkdbush^4.1.0package.json
All dependencies 133

Full resolved dependency set from the GitHub dependency graph: 1 direct and 132 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
npmkdbush4.1.0direct
npm@eslint-community/eslint-utils4.10.1indirect
npm@eslint-community/regexpp4.12.2indirect
npm@eslint/config-array0.23.5indirect
npm@eslint/config-helpers0.7.0indirect
npm@eslint/core1.2.1indirect
npm@eslint/js10.0.1indirect
npm@eslint/object-schema3.0.5indirect
npm@eslint/plugin-kit0.7.2indirect
npm@humanfs/core0.19.2indirect
npm@humanfs/node0.16.8indirect
npm@humanfs/types0.15.0indirect
npm@humanwhocodes/module-importer1.0.1indirect
npm@humanwhocodes/retry0.4.3indirect
npm@jridgewell/gen-mapping0.3.13indirect
npm@jridgewell/resolve-uri3.1.2indirect
npm@jridgewell/source-map0.3.11indirect
npm@jridgewell/sourcemap-codec1.5.5indirect
npm@jridgewell/trace-mapping0.3.31indirect
npm@napi-rs/lzma-linux-x64-gnu1.5.1indirect
npm@rollup/plugin-node-resolve16.0.3indirect
npm@rollup/plugin-terser1.0.0indirect
npm@rollup/pluginutils5.4.0indirect
npm@rollup/rollup-android-arm-eabi4.62.4indirect
npm@rollup/rollup-android-arm644.62.4indirect
npm@rollup/rollup-darwin-arm644.62.4indirect
npm@rollup/rollup-darwin-x644.62.4indirect
npm@rollup/rollup-freebsd-arm644.62.4indirect
npm@rollup/rollup-freebsd-x644.62.4indirect
npm@rollup/rollup-linux-arm-gnueabihf4.62.4indirect
npm@rollup/rollup-linux-arm-musleabihf4.62.4indirect
npm@rollup/rollup-linux-arm64-gnu4.62.4indirect
npm@rollup/rollup-linux-arm64-musl4.62.4indirect
npm@rollup/rollup-linux-loong64-gnu4.62.4indirect
npm@rollup/rollup-linux-loong64-musl4.62.4indirect
npm@rollup/rollup-linux-ppc64-gnu4.62.4indirect
npm@rollup/rollup-linux-ppc64-musl4.62.4indirect
npm@rollup/rollup-linux-riscv64-gnu4.62.4indirect
npm@rollup/rollup-linux-riscv64-musl4.62.4indirect
npm@rollup/rollup-linux-s390x-gnu4.62.4indirect
npm@rollup/rollup-linux-x64-gnu4.62.4indirect
npm@rollup/rollup-linux-x64-musl4.62.4indirect
npm@rollup/rollup-openbsd-x644.62.4indirect
npm@rollup/rollup-openharmony-arm644.62.4indirect
npm@rollup/rollup-win32-arm64-msvc4.62.4indirect
npm@rollup/rollup-win32-ia32-msvc4.62.4indirect
npm@rollup/rollup-win32-x64-gnu4.62.4indirect
npm@rollup/rollup-win32-x64-msvc4.62.4indirect
npm@stylistic/eslint-plugin5.10.0indirect
npm@types/esrecurse4.3.1indirect
npm@types/estree1.0.9indirect
npm@types/json-schema7.0.15indirect
npm@types/resolve1.20.2indirect
npm@typescript-eslint/types8.65.0indirect
npmacorn8.18.0indirect
npmacorn-jsx5.3.2indirect
npmajv6.15.0indirect
npmbalanced-match4.0.4indirect
npmbrace-expansion5.0.9indirect
npmbuffer-from1.1.2indirect
npmcommander2.20.3indirect
npmcross-spawn7.0.6indirect
npmdebug4.4.3indirect
npmdeep-is0.1.4indirect
npmdeepmerge4.3.1indirect
npmes-errors1.3.0indirect
npmescape-string-regexp4.0.0indirect
npmeslint10.8.0indirect
npmeslint-config-mourner5.0.1indirect
npmeslint-scope9.1.2indirect
npmeslint-visitor-keys3.4.3indirect
npmeslint-visitor-keys4.2.1indirect
npmeslint-visitor-keys5.0.1indirect
npmespree10.4.0indirect
npmespree11.2.0indirect
npmesquery1.7.0indirect
npmesrecurse4.3.0indirect
npmestraverse5.3.0indirect
npmestree-walker2.0.2indirect
npmesutils2.0.3indirect
npmfast-deep-equal3.1.3indirect
npmfast-json-stable-stringify2.1.0indirect
npmfast-levenshtein2.0.6indirect
npmfile-entry-cache8.0.0indirect
npmfind-up5.0.0indirect
npmflat-cache4.0.1indirect
npmflatted3.4.4indirect
npmfsevents2.3.3indirect
npmfunction-bind1.1.2indirect
npmglob-parent6.0.2indirect
npmglobals17.8.0indirect
npmhasown2.0.4indirect
npmignore5.3.2indirect
npmimurmurhash0.1.4indirect
npmis-core-module2.16.2indirect
npmis-extglob2.1.1indirect
npmis-glob4.0.3indirect
npmis-module1.0.0indirect
npmisexe2.0.0indirect
npmjson-buffer3.0.1indirect
npmjson-schema-traverse0.4.1indirect
npmjson-stable-stringify-without-jsonify1.0.1indirect
npmkeyv4.5.4indirect
npmlevn0.4.1indirect
npmlocate-path6.0.0indirect
npmminimatch10.2.6indirect
npmmkdirp3.0.1indirect
npmms2.1.3indirect
npmnatural-compare1.4.0indirect
npmoptionator0.9.4indirect
npmp-limit3.1.0indirect
npmp-locate5.0.0indirect
npmpath-exists4.0.0indirect
npmpath-key3.1.1indirect
npmpath-parse1.0.7indirect
npmpicomatch4.0.5indirect
npmprelude-ls1.2.1indirect
npmpunycode2.3.1indirect
npmresolve1.22.12indirect
npmrollup4.62.4indirect
npmserialize-javascript7.0.7indirect
npmshebang-command2.0.0indirect
npmshebang-regex3.0.0indirect
npmsmob1.6.2indirect
npmsource-map0.6.1indirect
npmsource-map-support0.5.21indirect
npmsupports-preserve-symlinks-flag1.0.0indirect
npmterser5.49.0indirect
npmtype-check0.4.0indirect
npmuri-js4.4.1indirect
npmwhich2.0.2indirect
npmword-wrap1.2.5indirect
npmyocto-queue0.1.0indirect
Dependency advisories 0

Installing npm:supercluster@9.0.0 pulls in 1 packages, direct and transitive: 0 carry known advisories, of which 0 are direct dependencies.

No known advisories affect the assessed dependencies.

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

Feedback

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 v0.31.0 — full methodology · metrics wiki.

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