Public record
Software health reportschema 0.12.0 · metrics 2.10.0 · 2026-07-18 00:13 UTC

mourner / suncalc

A tiny JavaScript library for calculating sun/moon positions and phases.

JavaScriptBSD-2-Clause★ 3,411 stars⑂ 438 forkssince Aug 2011View on GitHub ↗
KindLibraryhow this is determined

mourner/suncalc holds a health index of 77 out of 100, placing it in the Good band. It scores highest on Community & Adoption (79/100) and lowest on AI Readiness (36/100). It was last updated 6 days ago. A single contributor accounts for most of its recent work.

77
overall / 100
Good

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.

77
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 66 is calibrated to 77 on the published index scale (record calibration 2026-08-02).

Ownership

Volodymyr AgafonkinPersonal account
6,219 followers85 public repossince Sep 2008Mapbox

This repository is owned by a personal account. A single-owner project carries more continuity risk than an organization-backed one.

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
npmsuncalc2.0.11,010,687166 days agosunastronomymathcalculationsunrisesunsettwilightmoonillumination

Metrics by category

Vitality

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

77Good · 21% of overall

Development activity

61Moderate
How it's scored
36/36Push recency — last push 6 days ago
2.1/36Commit cadence — 3/52 weeks with commits
13.3/18Commit volume — 29 commits in the last year
10/10OpenSSF Scorecard: Maintained — 28 commit(s) and 23 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year29
human_commit_share—
days_since_last_push6
active_weeks_last_year3

Release discipline

100Exceptional
How it's scored
27/27Ships releases — 2 releases published
36/36Release recency — latest release 6 days ago
27/27Release cadence — a release every ~23 days
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count2
latest_release_tagv2.0.1
releases_from_tagsno
days_since_latest_release6
mean_days_between_releases23
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?

79Good · 17% of overall

Popularity & adoption

91Excellent
How it's scored
57.3/60Stars — 3,411 stars
22/25Forks — 438 forks
11.5/15Watchers — 117 watchers
Inputs used
forks438
stars3,411
watchers117
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

50Moderate
How it's scored
22.5/22.5README
22.5/22.5License — recognized license (BSD-2-Clause)
0/18CONTRIBUTING guide
0/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges—
has_contributingno
has_issue_templateno
has_code_of_conductno
readme_badge_services—
has_pull_request_templateno

Ecosystem adoption (downloads)

100Exceptional
How it's scored
80/80Monthly downloads — 1,010,687 downloads/month across npm
0/20Registry dependents — not reported by this ecosystem
Inputs used
packagessuncalc
dependents—
ecosystemsnpm
total_downloads—
monthly_downloads1,010,687
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?

63Moderate · 23% of overall

Maintainer resilience (bus factor)

29At Risk
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
1.6/22.5Commit distribution — top contributor authored 93% of commits
12.2/13.5Contributor breadth — 9 contributors
6/10OpenSSF Scorecard: Contributors — project has 2 contributing companies or organizations -- score normalized to 6
Inputs used
bus_factor1
contributors_sampled9
top_contributor_share0.928

Issue & PR responsiveness

61Moderate
How it's scored
39.8/42Issue resolution — 95% of issues closed
13.2/30PR acceptance — 11/25 decided PRs merged
0/13Newcomer PR acceptance — no first-time contributor's PR decided in 30d
0/15OpenSSF Scorecard: Code-Review — Found 0/30 approved changesets -- score normalized to 0
Inputs used
merged_prs11
open_issues8
closed_issues146
prs_merged_7d—
prs_decided_7d—
prs_merged_30d—
prs_decided_30d—
issue_closed_ratio0.948
closed_unmerged_prs14
first_time_authors_30d—
first_time_prs_merged_30d—
first_time_prs_decided_30d—
Excluded from scoring (no data or not applicable): Newcomer PR acceptance. Remaining weights renormalized.

Ownership & stewardship

75Good
How it's scored
10/30Ownership backing — personal (user) account
0/20Verified domain — not applicable to user accounts
25/25Owner reach — 6,219 followers of mourner
25/25Track record — 85 public repos, account ~17 yr old
Inputs used
followers6,219
owner_typeUser
is_verified—
owner_loginmourner
public_repos85
account_age_days6,510
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 6 days ago
20/20Version history — 16 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packagessuncalc
ecosystemsnpm
any_deprecatedno
min_days_since_publish6

Engineering Quality

Are baseline engineering and documentation practices in place?

64Moderate · 19% of overall

Engineering practices

80Excellent
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
0/20OpenSSF Scorecard: CI-Tests — no data
Inputs used
has_ciyes
has_testsyes
has_editorconfigno
has_linter_configyes
has_precommit_configno
Excluded from scoring (no data or not applicable): OpenSSF Scorecard: CI-Tests. Remaining weights renormalized.

Documentation

40Weak
How it's scored
30/30README
0/25Documentation directory
0/15Documentation / homepage site
10/10Repository description
0/10Topics
0/10Wiki
Inputs used
topics—
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?

51Moderate · 16% of overall

Security posture

51Moderate
How it's scored
7.5/7.5Binary-Artifacts — no binaries found in the repo
0/7.5Branch-Protection — branch protection not enabled on development/release branches
0/2.5CI-Tests — no data
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
0/7.5Code-Review — Found 0/30 approved changesets -- score normalized to 0
1.5/2.5Contributors — project has 2 contributing companies or organizations -- score normalized to 6
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
7.5/7.5Maintained — 28 commit(s) and 23 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
0/5SAST — no SAST tool detected
0/5Security-Policy — security policy file not detected
0/7.5Signed-Releases — no data
7.5/7.5Token-Permissions — GitHub workflow tokens follow principle of least privilege
7.5/7.5Vulnerabilities — 0 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated15
scorecard_versionv5.5.0
checks_inconclusive3
scorecard_aggregate5.1
Excluded from scoring (no data or not applicable): CI-Tests, Packaging, Signed-Releases. Remaining weights renormalized.

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.

36Weak · 4% of overall

Agent context & guidance

1Critical
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
0/40Legible commit history — no data
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share—
agent_instruction_files—
agent_instruction_max_bytes—
Excluded from scoring (no data or not applicable): Legible commit history. Remaining weights renormalized.

Verify loop (build / test / typecheck)

56Moderate
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 data
0/8Automated maintenance — no data
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_share—
toolchain_manifests—
dependency_bot_commit_share—
Excluded from scoring (no data or not applicable): Demonstrated agent practice, Automated maintenance. Remaining weights renormalized.

Code legibility for models

55Moderate
How it's scored
0/45Type-checkable code — JavaScript without a type-check config
55/55Manageable file sizes — 0/8 source files over 60KB
Inputs used
primary_languageJavaScript
largest_source_bytes21,055
source_files_sampled8
oversized_source_files0

Key facts

3,411GitHub stars
9contributors
29commits, last 12 months
6days since last push
2releases
1bus factor
8open issues
npmpackage ecosystems

More detail

OpenSSF Scorecard 5.1 / 10
5.1aggregate

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 · 2026-07-18 00:12 UTC

10Binary-Artifactsno binaries found in the repo
0Branch-Protectionbranch protection not enabled on development/release branches
n/aCI-Testsno pull request found
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
0Code-ReviewFound 0/30 approved changesets -- score normalized to 0
6Contributorsproject has 2 contributing companies or organizations -- score normalized to 6
10Dangerous-Workflowno dangerous workflow patterns detected
0Dependency-Update-Toolno update tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
10Maintained28 commit(s) and 23 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
0SASTno SAST tool detected
0Security-Policysecurity policy file not detected
n/aSigned-Releasesno releases found
10Token-PermissionsGitHub workflow tokens follow principle of least privilege
10Vulnerabilities0 existing vulnerabilities detected
All dependencies 101

Full resolved dependency set from the GitHub dependency graph: 0 direct and 101 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
npm@emnapi/core1.11.0indirect
npm@emnapi/runtime1.11.0indirect
npm@emnapi/wasi-threads1.2.2indirect
npm@eslint-community/eslint-utils4.9.1indirect
npm@eslint-community/regexpp4.12.2indirect
npm@eslint/config-array0.23.5indirect
npm@eslint/config-helpers0.6.0indirect
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@napi-rs/wasm-runtime1.1.5indirect
npm@oxc-project/types0.135.0indirect
npm@rolldown/binding-android-arm641.1.1indirect
npm@rolldown/binding-darwin-arm641.1.1indirect
npm@rolldown/binding-darwin-x641.1.1indirect
npm@rolldown/binding-freebsd-x641.1.1indirect
npm@rolldown/binding-linux-arm-gnueabihf1.1.1indirect
npm@rolldown/binding-linux-arm64-gnu1.1.1indirect
npm@rolldown/binding-linux-arm64-musl1.1.1indirect
npm@rolldown/binding-linux-ppc64-gnu1.1.1indirect
npm@rolldown/binding-linux-s390x-gnu1.1.1indirect
npm@rolldown/binding-linux-x64-gnu1.1.1indirect
npm@rolldown/binding-linux-x64-musl1.1.1indirect
npm@rolldown/binding-openharmony-arm641.1.1indirect
npm@rolldown/binding-wasm32-wasi1.1.1indirect
npm@rolldown/binding-win32-arm64-msvc1.1.1indirect
npm@rolldown/binding-win32-x64-msvc1.1.1indirect
npm@rolldown/pluginutils1.0.1indirect
npm@stylistic/eslint-plugin5.10.0indirect
npm@tybys/wasm-util0.10.2indirect
npm@types/esrecurse4.3.1indirect
npm@types/estree1.0.9indirect
npm@types/json-schema7.0.15indirect
npm@typescript-eslint/types8.61.1indirect
npmacorn8.17.0indirect
npmacorn-jsx5.3.2indirect
npmajv6.15.0indirect
npmbalanced-match4.0.4indirect
npmbrace-expansion5.0.6indirect
npmcross-spawn7.0.6indirect
npmdebug4.4.3indirect
npmdeep-is0.1.4indirect
npmescape-string-regexp4.0.0indirect
npmeslint10.5.0indirect
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
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
npmflatted3.4.2indirect
npmglob-parent6.0.2indirect
npmglobals17.6.0indirect
npmignore5.3.2indirect
npmimurmurhash0.1.4indirect
npmis-extglob2.1.1indirect
npmis-glob4.0.3indirect
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
npmminimatch10.2.5indirect
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
npmpicomatch4.0.4indirect
npmprelude-ls1.2.1indirect
npmpunycode2.3.1indirect
npmrolldown1.1.1indirect
npmshebang-command2.0.0indirect
npmshebang-regex3.0.0indirect
npmtslib2.8.1indirect
npmtype-check0.4.0indirect
npmuri-js4.4.1indirect
npmwhich2.0.2indirect
npmword-wrap1.2.5indirect
npmyocto-queue0.1.0indirect
Raw JSON report machine-readable

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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 v0.12.0 — full methodology · metrics wiki.

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