Public record
Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-10-25 21:39 UTC

confetti / yayson

A library for serializing and reading JSON API data in JavaScript.

TypeScriptMIT★ 186 stars⑂ 28 forkssince Sep 2014View on GitHub ↗
KindLibraryhow this is determined

confetti/yayson holds a health index of 67 out of 100, placing it in the Good band. It scores highest on AI Readiness (73/100) and lowest on Security (48/100). It was last updated 40 days ago. A single contributor accounts for most of its recent work.

67
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.

67
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 61 is calibrated to 67 on the published index scale (record calibration 2026-08-02).

Ownership

ConfettiOrganization · verified domain
1 follower8 public repossince Mar 2014

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

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
npmyayson4.4.015,6562940 days agojson-apijsonapiresponseformatserializationdeserializationyaywowomg

Metrics by category

Vitality

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

60Moderate · 21% of overall

Development activity

52Moderate
How it's scored
18/36Push recency — last push 40 days ago
11.8/36Commit cadence — 17/52 weeks with commits
18/18Commit volume — 101 commits in the last year
4/10OpenSSF Scorecard: Maintained — 5 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 4
Inputs used
commits_last_year101
human_commit_share1
days_since_last_push40
active_weeks_last_year17

Release discipline

72Good
How it's scored
16.2/27Ships releases — 27 version tags (no GitHub releases)
36/36Release recency — latest release 40 days ago
12.6/27Release cadence — a release every ~363.7 days
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count27
latest_release_tagv4.4.0
releases_from_tagsyes
days_since_latest_release40
mean_days_between_releases363.7
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?

56Moderate · 17% of overall

Popularity & adoption

53Moderate
How it's scored
36.8/60Stars — 186 stars
11.9/25Forks — 28 forks
3.9/15Watchers — 6 watchers
Inputs used
forks28
stars186
watchers6
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 (MIT)
0/18CONTRIBUTING guide
0/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges0
has_contributingno
has_issue_templateno
has_code_of_conductno
readme_badge_services—
has_pull_request_templateno

Ecosystem adoption (downloads)

70Good
How it's scored
55.9/80Monthly downloads — 15,656 downloads/month across npm
0/20Registry dependents — not reported by this ecosystem
Inputs used
packagesyayson
dependents—
ecosystemsnpm
total_downloads—
monthly_downloads15,656
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)

37Weak
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
4.6/22.5Commit distribution — top contributor authored 80% of commits
13.5/13.5Contributor breadth — 13 contributors
10/10OpenSSF Scorecard: Contributors — project has 5 contributing companies or organizations
Inputs used
bus_factor1
contributors_sampled13
top_contributor_share0.796

Issue & PR responsiveness

58Moderate
How it's scored
40/42Issue resolution — 95% of issues closed
10.5/30PR acceptance — 30/86 decided PRs merged
0/13Newcomer PR acceptance — no first-time contributor's PR decided in 30d
0/15OpenSSF Scorecard: Code-Review — Found 0/11 approved changesets -- score normalized to 0
Inputs used
merged_prs30
open_issues1
closed_issues20
prs_merged_7d0
prs_decided_7d0
prs_merged_30d0
prs_decided_30d0
issue_closed_ratio0.952
closed_unmerged_prs56
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

71Good
How it's scored
30/30Ownership backing — organization-owned
20/20Verified domain
2.2/25Owner reach — 1 followers of confetti
18.9/25Track record — 8 public repos, account ~12 yr old
Inputs used
followers1
owner_typeOrganization
is_verifiedyes
owner_loginconfetti
public_repos8
account_age_days4,591

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable — 1 package(s) on npm
35/35Publish recency — latest publish 40 days ago
20/20Version history — 29 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packagesyayson
ecosystemsnpm
any_deprecatedno
min_days_since_publish40

Engineering Quality

Are baseline engineering and documentation practices in place?

70Good · 19% of overall

Engineering practices

84Excellent
How it's scored
24/24CI workflows — 1 workflow(s)
24/24Tests present
16/16Linter config — eslint.config.mjs
0/9.6Pre-commit hooks
0/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests — 3 out of 3 merged PRs checked by a CI test -- score normalized to 10
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
0/10Topics
10/10Wiki
Inputs used
topics—
has_wikiyes
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?

48Weak · 16% of overall

Security posture

35Weak
How it's scored
7.5/7.5Binary-Artifacts — no binaries found in the repo
2.2/7.5Branch-Protection — branch protection is not maximal on development and all release branches
2.5/2.5CI-Tests — 3 out of 3 merged PRs checked by a CI test -- score normalized to 10
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
0/7.5Code-Review — Found 0/11 approved changesets -- score normalized to 0
2.5/2.5Contributors — project has 5 contributing companies or organizations
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
3/7.5Maintained — 5 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 4
0/5Packaging — no data
1.5/5Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 3
0/5SAST — SAST tool is not run on all commits -- score normalized to 0
0/5Security-Policy — security policy file not detected
0/7.5Signed-Releases — no data
0/7.5Token-Permissions — detected GitHub workflow tokens with excessive permissions
0.8/7.5Vulnerabilities — 9 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate3.5
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
0/25Indirect dependencies free of known advisories — transitive set not separable from development and test dependencies in this scope
0/40No advisories left outstanding — no advisory carries a publication date
Inputs used
sourceosv
advisories12
affected_packages6
assessed_packages292
unassessed_packages0
affected_by_severitycritical 1, high 4, moderate 1
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 292 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.

73Good · 4% of overall

Agent context & guidance

68Good
How it's scored
45/45Agent instructions — CLAUDE.md
15/15Machine-readable docs (llms.txt) — llms.txt served by the project website (https://docs.anthropic.com/llms.txt)
8.5/40Legible commit history — 16 of 100 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtyes
llms_txt_urlhttps://docs.anthropic.com/llms.txt
legible_history_share0.16
agent_instruction_filesCLAUDE.md
agent_instruction_max_bytes2,454

Verify loop (build / test / typecheck)

67Good
How it's scored
0/18One-command bootstrap
22/22Automated tests
11/11Lint / format config — eslint.config.mjs
11/11Static type checking — tsconfig.json
10/10Reproducible environment — lockfile
10/10Demonstrated agent practice — 10 of the last 100 commits agent-authored or agent-credited
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_languageyes
bootstrap_files—
has_devcontainerno
has_linter_configyes
typecheck_configstsconfig.json
agent_commit_share0.1
toolchain_manifests—
dependency_bot_commit_share0

Code legibility for models

100Exceptional
How it's scored
45/45Type-checkable code — TypeScript (statically typed)
55/55Manageable file sizes — 0/34 source files over 60KB
Inputs used
primary_languageTypeScript
largest_source_bytes57,315
source_files_sampled34
oversized_source_files0

Key facts

186GitHub stars
13contributors
101commits, last 12 months
40days since last push
27releases
1bus factor
1open 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 ★ / 28 ⇿
0Stars
28Forks
21Releases

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.

0510152025302822015-052021-012026-09
Major 3Minor 4Patch 9

Each point covers 11 days.

OpenSSF Scorecard 3.5 / 10
3.5aggregate

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 · 2026-10-25 21:39 UTC

10Binary-Artifactsno binaries found in the repo
3Branch-Protectionbranch protection is not maximal on development and all release branches
10CI-Tests3 out of 3 merged PRs checked by a CI test -- score normalized to 10
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
0Code-ReviewFound 0/11 approved changesets -- score normalized to 0
10Contributorsproject has 5 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
0Dependency-Update-Toolno update tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
4Maintained5 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 4
n/aPackagingpackaging workflow not detected
3Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 3
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
1Vulnerabilities9 existing vulnerabilities detected
All dependencies 292

Full resolved dependency set from the GitHub dependency graph: 0 direct and 292 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
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npmsinon21.1.2indirect
npmsinon-chai3.7.0indirect
npmstring-width4.2.3indirect
npmstring-width5.1.2indirect
npmstrip-ansi6.0.1indirect
npmstrip-ansi7.1.2indirect
npmstrip-json-comments3.1.1indirect
npmsupports-color7.2.0indirect
npmsupports-color8.1.1indirect
npmtinyexec1.0.2indirect
npmtinyglobby0.2.15indirect
npmto-regex-range5.0.1indirect
npmtree-kill1.2.2indirect
npmts-api-utils2.1.0indirect
npmtsdown0.20.0-beta.4indirect
npmtslib2.8.1indirect
npmtsx4.20.6indirect
npmtype-check0.4.0indirect
npmtype-detect4.0.8indirect
npmtype-detect4.1.0indirect
npmtypescript5.9.3indirect
npmtypescript-eslint8.46.3indirect
npmunconfig-core7.4.2indirect
npmundici-types7.16.0indirect
npmunrun0.2.25indirect
npmuri-js4.4.1indirect
npmwhich2.0.2indirect
npmword-wrap1.2.5indirect
npmworkerpool9.3.4indirect
npmwrap-ansi7.0.0indirect
npmwrap-ansi8.1.0indirect
npmy18n5.0.8indirect
npmyargs17.7.2indirect
npmyargs-parser21.1.1indirect
npmyargs-unparser2.0.0indirect
npmyocto-queue0.1.0indirect
npmzod4.3.5indirect
Dependency advisories 6

This repository publishes no package the index resolves, so its own dependency graph was assessed — 292 packages, which also include development and test pins that never ship: 6 carry known advisories, of which 0 are direct.

PackageVersionRelationSeverityAdvisoriesFixed in
shell-quote1.9.0indirectcritical11.11.0
brace-expansion1.1.18indirecthigh35.0.12
brace-expansion2.1.4indirecthigh35.0.12
serialize-javascript6.0.2indirecthigh37.1.3
zod4.3.5indirecthigh14.6.6
diff7.0.0indirectmoderate18.0.3

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.

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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 — npm.