Public record
Software health reportschema 0.31.0 · metrics 2.10.0 · 2026-08-13 01:13 UTC

mapbox / delaunator

An incredibly fast JavaScript library for Delaunay triangulation of 2D points

JavaScriptISC★ 2,615 stars⑂ 153 forkssince May 2017View on GitHub ↗
KindLibraryhow this is determined
#computational-geometry#algorithm#javascript#delaunay#triangulation#2d#fast

mapbox/delaunator holds a health index of 80 out of 100, placing it in the Excellent band. It scores highest on Community & Adoption (89/100) and lowest on AI Readiness (46/100). It was last updated 49 days ago. A single contributor accounts for most of its recent work.

80
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.

80
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 68 is calibrated to 80 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
npmdelaunator5.1.084,886,68920142 days agodelaunay-triangulationcomputational-geometryalgorithms

Metrics by category

Vitality

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

47Weak · 21% of overall

Development activity

29At Risk
How it's scored
18/36Push recency — last push 49 days ago
2.8/36Commit cadence — 4/52 weeks with commits
7.6/18Commit volume — 6 commits in the last year
1/10OpenSSF Scorecard: Maintained — 1 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 1
Inputs used
commits_last_year6
human_commit_share0.99
days_since_last_push49
active_weeks_last_year4

Release discipline

74Good
How it's scored
27/27Ships releases — 19 releases published
27/36Release recency — latest release 142 days ago
12.6/27Release cadence — a release every ~306.8 days
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count19
latest_release_tagv5.1.0
releases_from_tagsno
days_since_latest_release142
mean_days_between_releases306.8
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?

89Excellent · 17% of overall

Popularity & adoption

86Excellent
How it's scored
55.4/60Stars — 2,615 stars
18.2/25Forks — 153 forks
12/15Watchers — 148 watchers
Inputs used
forks153
stars2,615
watchers148
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_badges3
has_contributingyes
has_issue_templateno
has_code_of_conductyes
readme_badge_servicesbadgen.net, github.com, shields.io
has_pull_request_templateno

Ecosystem adoption (downloads)

100Exceptional
How it's scored
80/80Monthly downloads — 84,886,689 downloads/month across npm
0/20Registry dependents — not reported by this ecosystem
Inputs used
packagesdelaunator
dependents—
ecosystemsnpm
total_downloads—
monthly_downloads84,886,689
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?

75Good · 23% of overall

Maintainer resilience (bus factor)

36Weak
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
3.5/22.5Commit distribution — top contributor authored 84% of commits
13.5/13.5Contributor breadth — 16 contributors
10/10OpenSSF Scorecard: Contributors — project has 3 contributing companies or organizations -- score normalized to 10
Inputs used
bus_factor1
contributors_sampled16
top_contributor_share0.844

Issue & PR responsiveness

77Good
How it's scored
37.9/42Issue resolution — 90% of issues closed
24.8/30PR acceptance — 38/46 decided PRs merged
0/13Newcomer PR acceptance — no first-time contributor's PR decided in 30d
4.5/15OpenSSF Scorecard: Code-Review — Found 9/27 approved changesets -- score normalized to 3
Inputs used
merged_prs38
open_issues5
closed_issues46
prs_merged_7d0
prs_decided_7d0
prs_merged_30d0
prs_decided_30d0
issue_closed_ratio0.902
closed_unmerged_prs8
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.

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 142 days ago
20/20Version history — 20 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packagesdelaunator
ecosystemsnpm
any_deprecatedno
min_days_since_publish142

Engineering Quality

Are baseline engineering and documentation practices in place?

79Good · 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 — 4 out of 10 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

90Excellent
How it's scored
30/30README
25/25Documentation directory
15/15Documentation / homepage site — https://mapbox.github.io/delaunator/
10/10Repository description
10/10Topics — 7 topics
0/10Wiki
Inputs used
topicscomputational-geometry, algorithm, javascript, delaunay, triangulation, 2d, fast
has_wikino
homepagehttps://mapbox.github.io/delaunator/
docs_sitehttps://mapbox.github.io/delaunator/
has_readmeyes
has_docs_diryes
has_descriptionyes

Security

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

56Moderate · 16% of overall

Security posture

45Weak
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 — 4 out of 10 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
2.2/7.5Code-Review — Found 9/27 approved changesets -- score normalized to 3
2.5/2.5Contributors — project has 3 contributing companies or organizations -- score normalized to 10
10/10Dangerous-Workflow — no dangerous workflow patterns detected
0/7.5Dependency-Update-Tool — no update tool detected
0/5Fuzzing — project is not fuzzed
2.5/2.5License — license file detected
0.8/7.5Maintained — 1 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 1
0/5Packaging — no data
1.5/5Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 3
2.5/5SAST — SAST tool is not run on all commits -- score normalized to 5
5/5Security-Policy — security policy file detected
0/7.5Signed-Releases — no data
0/7.5Token-Permissions — detected GitHub workflow tokens with excessive permissions
1.5/7.5Vulnerabilities — 8 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate4.5
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:delaunator@5.1.0 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.

46Weak · 4% of overall

Agent context & guidance

12Critical
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
11.9/40Legible commit history — 22 of 99 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share0.222
agent_instruction_files—
agent_instruction_max_bytes—

Verify loop (build / test / typecheck)

57Moderate
How it's scored
0/18One-command bootstrap
22/22Automated tests
11/11Lint / format config — eslint.config.js
11/11Static type checking — tsconfig.json
10/10Reproducible environment — lockfile
0/10Demonstrated agent practice — no agent-authored commits among the last 100
0/8Automated maintenance — no automated dependency updates observed
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_configstsconfig.json
agent_commit_share0
toolchain_manifests—
dependency_bot_commit_share0

Code legibility for models

82Excellent
How it's scored
27/45Type-checkable code — JavaScript with type-check config (tsconfig.json)
55/55Manageable file sizes — 0/6 source files over 60KB
Inputs used
primary_languageJavaScript
largest_source_bytes19,472
source_files_sampled6
oversized_source_files0

Key facts

2,615GitHub stars
16contributors
6commits, last 12 months
49days since last push
19releases
1bus factor
5open 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 ★ / 153 ⇿
0Stars
153Forks
19Releases

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.

0408012016015272017-052021-122026-08
Major 4Minor 1Patch 14

Each point covers 9 days.

OpenSSF Scorecard 4.5 / 10
4.5aggregate

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 01:13 UTC

10Binary-Artifactsno binaries found in the repo
6Branch-Protectionbranch protection is not maximal on development and all release branches
4CI-Tests4 out of 10 merged PRs checked by a CI test -- score normalized to 4
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
3Code-ReviewFound 9/27 approved changesets -- score normalized to 3
10Contributorsproject has 3 contributing companies or organizations -- score normalized to 10
10Dangerous-Workflowno dangerous workflow patterns detected
0Dependency-Update-Toolno update tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
1Maintained1 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 1
n/aPackagingpackaging workflow not detected
3Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 3
5SASTSAST tool is not run on all commits -- score normalized to 5
10Security-Policysecurity policy file detected
n/aSigned-Releasesno releases found
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
2Vulnerabilities8 existing vulnerabilities detected
Direct dependencies 1
RegistryPackageVersion constraintManifest
npmrobust-predicates^3.0.2package.json
All dependencies 141

Full resolved dependency set from the GitHub dependency graph: 1 direct and 140 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
npmrobust-predicates3.0.2direct
npm@eslint-community/eslint-utils4.7.0indirect
npm@eslint-community/regexpp4.12.1indirect
npm@eslint/config-array0.21.0indirect
npm@eslint/config-helpers0.3.0indirect
npm@eslint/core0.15.1indirect
npm@eslint/eslintrc3.3.1indirect
npm@eslint/js9.31.0indirect
npm@eslint/object-schema2.1.6indirect
npm@eslint/plugin-kit0.3.3indirect
npm@humanfs/core0.19.1indirect
npm@humanfs/node0.16.6indirect
npm@humanwhocodes/module-importer1.0.1indirect
npm@humanwhocodes/retry0.3.1indirect
npm@humanwhocodes/retry0.4.3indirect
npm@jridgewell/gen-mapping0.3.12indirect
npm@jridgewell/resolve-uri3.1.2indirect
npm@jridgewell/source-map0.3.10indirect
npm@jridgewell/sourcemap-codec1.5.4indirect
npm@jridgewell/trace-mapping0.3.29indirect
npm@rollup/plugin-node-resolve16.0.1indirect
npm@rollup/plugin-terser0.4.4indirect
npm@rollup/pluginutils5.2.0indirect
npm@rollup/rollup-android-arm-eabi4.45.0indirect
npm@rollup/rollup-android-arm644.45.0indirect
npm@rollup/rollup-darwin-arm644.45.0indirect
npm@rollup/rollup-darwin-x644.45.0indirect
npm@rollup/rollup-freebsd-arm644.45.0indirect
npm@rollup/rollup-freebsd-x644.45.0indirect
npm@rollup/rollup-linux-arm-gnueabihf4.45.0indirect
npm@rollup/rollup-linux-arm-musleabihf4.45.0indirect
npm@rollup/rollup-linux-arm64-gnu4.45.0indirect
npm@rollup/rollup-linux-arm64-musl4.45.0indirect
npm@rollup/rollup-linux-loongarch64-gnu4.45.0indirect
npm@rollup/rollup-linux-powerpc64le-gnu4.45.0indirect
npm@rollup/rollup-linux-riscv64-gnu4.45.0indirect
npm@rollup/rollup-linux-riscv64-musl4.45.0indirect
npm@rollup/rollup-linux-s390x-gnu4.45.0indirect
npm@rollup/rollup-linux-x64-gnu4.45.0indirect
npm@rollup/rollup-linux-x64-musl4.45.0indirect
npm@rollup/rollup-win32-arm64-msvc4.45.0indirect
npm@rollup/rollup-win32-ia32-msvc4.45.0indirect
npm@rollup/rollup-win32-x64-msvc4.45.0indirect
npm@stylistic/eslint-plugin-js2.13.0indirect
npm@types/estree1.0.8indirect
npm@types/json-schema7.0.15indirect
npm@types/resolve1.20.2indirect
npmacorn8.15.0indirect
npmacorn-jsx5.3.2indirect
npmajv6.12.6indirect
npmansi-styles4.3.0indirect
npmargparse2.0.1indirect
npmbalanced-match1.0.2indirect
npmbrace-expansion1.1.12indirect
npmbuffer-from1.1.2indirect
npmcallsites3.1.0indirect
npmchalk4.1.2indirect
npmcolor-convert2.0.1indirect
npmcolor-name1.1.4indirect
npmcommander2.20.3indirect
npmconcat-map0.0.1indirect
npmcross-spawn7.0.6indirect
npmdebug4.4.1indirect
npmdeep-is0.1.4indirect
npmdeepmerge4.3.1indirect
npmescape-string-regexp4.0.0indirect
npmeslint9.31.0indirect
npmeslint-config-mourner4.0.2indirect
npmeslint-scope8.4.0indirect
npmeslint-visitor-keys3.4.3indirect
npmeslint-visitor-keys4.2.1indirect
npmespree10.4.0indirect
npmesquery1.6.0indirect
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
npmflatted3.3.3indirect
npmfsevents2.3.3indirect
npmfunction-bind1.1.2indirect
npmglob-parent6.0.2indirect
npmglobals14.0.0indirect
npmglobals15.15.0indirect
npmhas-flag4.0.0indirect
npmhasown2.0.2indirect
npmignore5.3.2indirect
npmimport-fresh3.3.1indirect
npmimurmurhash0.1.4indirect
npmis-core-module2.16.1indirect
npmis-extglob2.1.1indirect
npmis-glob4.0.3indirect
npmis-module1.0.0indirect
npmisexe2.0.0indirect
npmjs-yaml4.1.0indirect
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
npmlodash.merge4.6.2indirect
npmminimatch3.1.2indirect
npmms2.1.3indirect
npmnatural-compare1.4.0indirect
npmoptionator0.9.4indirect
npmp-limit3.1.0indirect
npmp-locate5.0.0indirect
npmparent-module1.0.1indirect
npmpath-exists4.0.0indirect
npmpath-key3.1.1indirect
npmpath-parse1.0.7indirect
npmpicomatch4.0.2indirect
npmprelude-ls1.2.1indirect
npmpunycode2.3.1indirect
npmrandombytes2.1.0indirect
npmresolve1.22.10indirect
npmresolve-from4.0.0indirect
npmrollup4.45.0indirect
npmsafe-buffer5.2.1indirect
npmserialize-javascript6.0.2indirect
npmshebang-command2.0.0indirect
npmshebang-regex3.0.0indirect
npmsmob1.5.0indirect
npmsource-map0.6.1indirect
npmsource-map-support0.5.21indirect
npmstrip-json-comments3.1.1indirect
npmsupports-color7.2.0indirect
npmsupports-preserve-symlinks-flag1.0.0indirect
npmterser5.43.1indirect
npmtype-check0.4.0indirect
npmtypescript5.8.3indirect
npmuri-js4.4.1indirect
npmwhich2.0.2indirect
npmword-wrap1.2.5indirect
npmyocto-queue0.1.0indirect
Dependency advisories 0

Installing npm:delaunator@5.1.0 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.