Public record
Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-09-17 00:27 UTC

sciencesakura / mutf-8

A TypeScript/JavaScript library for encoding and decoding Modified UTF-8, the character encoding variant used in the Java platform for class files, object serialization, and other Java technologies.

TypeScriptMIT★ 8 stars⑂ 1 forksince Oct 2020View on GitHub ↗

sciencesakura/mutf-8 holds a health index of 63 out of 100, placing it in the Moderate band. It scores highest on Vitality (78/100) and lowest on Community & Adoption (38/100). It was last updated 4 days ago. A single contributor accounts for most of its recent work.

63
overall / 100
Moderate

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.

63
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 59 is calibrated to 63 on the published index scale (record calibration 2026-08-02).

Ownership

sciencesakuraPersonal account
4 followers22 public repossince Apr 2017

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
npmmutf-81.2.44,7121753 days agocharsetencodingjavamutf-8mutf8
npmmutf-8-stream1.2.442553 days agocharsetencodingjavamutf-8mutf8

Metrics by category

Vitality

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

78Good · 21% of overall
How it's scored
36/36Push recencylast push 4 days ago
5.5/36Commit cadence8/52 weeks with commits
16.8/18Commit volume73 commits in the last year
10/10OpenSSF Scorecard: Maintained30 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year73
human_commit_share0.83
days_since_last_push4
active_weeks_last_year8
How it's scored
27/27Ships releases11 releases published
36/36Release recencylatest release 53 days ago
19.8/27Release cadencea release every ~111.7 days
0/10OpenSSF Scorecard: Signed-Releasesno data
Inputs used
releases_count11
latest_release_tagv1.2.4
releases_from_tagsno
days_since_latest_release53
mean_days_between_releases111.7
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?

38Weak · 17% of overall
How it's scored
13.7/60Stars8 stars
0/25Forks1 forks
0/15Watchers0 watchers
Inputs used
forks1
stars8
watchers0
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history
How it's scored
22.5/22.5README
22.5/22.5Licenserecognized 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_badges2
has_contributingno
has_issue_templateno
has_code_of_conductno
readme_badge_servicesbadge.fury.io, github.com
has_pull_request_templateno
How it's scored
49/80Monthly downloads4,754 downloads/month across npm
0/20Registry dependentsnot reported by this ecosystem
Inputs used
packagesmutf-8, mutf-8-stream
dependents
ecosystemsnpm
total_downloads
monthly_downloads4,754
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?

54Moderate · 23% of overall
How it's scored
9/54Bus factor1 contributor(s) cover half of all commits
0.1/22.5Commit distributiontop contributor authored 99% of commits
2.7/13.5Contributor breadth2 contributors
0/10OpenSSF Scorecard: Contributorsproject has 0 contributing companies or organizations -- score normalized to 0
Inputs used
bus_factor1
contributors_sampled2
top_contributor_share0.994
How it's scored
42/42Issue resolution100% of issues closed
25.2/30PR acceptance73/87 decided PRs merged
0/13Newcomer PR acceptanceno first-time contributor's PR decided in 30d
0/15OpenSSF Scorecard: Code-ReviewFound 0/9 approved changesets -- score normalized to 0
Inputs used
merged_prs73
open_issues0
closed_issues5
prs_merged_7d0
prs_decided_7d0
prs_merged_30d0
prs_decided_30d0
issue_closed_ratio1
closed_unmerged_prs14
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
10/30Ownership backingpersonal (user) account
0/20Verified domainnot applicable to user accounts
5/25Owner reach4 followers of sciencesakura
21.9/25Track record22 public repos, account ~9 yr old
Inputs used
followers4
owner_typeUser
is_verified
owner_loginsciencesakura
public_repos22
account_age_days3,437
Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable2 package(s) on npm
35/35Publish recencylatest publish 53 days ago
20/20Version history17 published versions
20/20Not deprecatedactive, not deprecated or yanked
Inputs used
packagesmutf-8, mutf-8-stream
ecosystemsnpm
any_deprecatedno
min_days_since_publish53

Engineering Quality

Are baseline engineering and documentation practices in place?

60Moderate · 19% of overall
How it's scored
24/24CI workflows3 workflow(s)
0/24Tests present
16/16Linter configbiome.json
0/9.6Pre-commit hooks
6.4/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests12 out of 12 merged PRs checked by a CI test -- score normalized to 10
Inputs used
has_ciyes
has_testsno
has_editorconfigyes
has_linter_configyes
has_precommit_configno

Documentation

50Moderate
How it's scored
30/30README
0/25Documentation directory
0/15Documentation / homepage site
10/10Repository description
10/10Topics5 topics
0/10Wiki
Inputs used
topicscharset, encoding, java, mutf-8, mutf8
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?

65Good · 16% of overall
How it's scored
7.5/7.5Binary-Artifactsno binaries found in the repo
0/7.5Branch-Protectionno data
2.5/2.5CI-Tests12 out of 12 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
0/7.5Code-ReviewFound 0/9 approved changesets -- score normalized to 0
0/2.5Contributorsproject has 0 contributing companies or organizations -- score normalized to 0
10/10Dangerous-Workflowno dangerous workflow patterns detected
7.5/7.5Dependency-Update-Toolupdate tool detected
0/5Fuzzingproject is not fuzzed
2.5/2.5Licenselicense file detected
7.5/7.5Maintained30 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 10
5/5Packagingpackaging workflow detected
2.5/5Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 5
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
5.2/7.5Vulnerabilities3 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate5.6
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
advisories4
affected_packages3
assessed_packages181
unassessed_packages1
affected_by_severityhigh 1, moderate 2
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 181 resolved dependencies against OSV. 1 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list. 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.

52Moderate · 4% of overall
How it's scored
0/45Agent instructionsno CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
37.9/40Legible commit history59 of 83 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url
legible_history_share0.711
agent_instruction_files
agent_instruction_max_bytes
How it's scored
0/18One-command bootstrap
0/22Automated tests
11/11Lint / format configbiome.json
11/11Static type checkingpackages/mutf-8-stream/tsconfig.json, packages/mutf-8/tsconfig.json, tsconfig.json
10/10Reproducible environmentdevcontainer, Dockerfile, lockfile
0/10Demonstrated agent practiceno agent-authored commits among the last 100
8/8Automated maintenance17 of the last 100 commits are automated dependency updates
5/10OpenSSF Scorecard: Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 5
Inputs used
has_nixno
has_testsno
lockfilespackage-lock.json
has_dockerfileyes
typed_languageyes
bootstrap_files
has_devcontaineryes
has_linter_configyes
typecheck_configspackages/mutf-8-stream/tsconfig.json, packages/mutf-8/tsconfig.json, tsconfig.json
agent_commit_share0
toolchain_manifests
dependency_bot_commit_share0.17
How it's scored
45/45Type-checkable codeTypeScript (statically typed)
55/55Manageable file sizes0/2 source files over 60KB
Inputs used
primary_languageTypeScript
largest_source_bytes14,830
source_files_sampled2
oversized_source_files0

Key facts

8GitHub stars
2contributors
73commits, last 12 months
4days since last push
11releases
1bus factor
0open issues
npmpackage ecosystems

Data collection warnings

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

More detail

OpenSSF Scorecard 5.6 / 10
5.6aggregate

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 · 2026-09-17 00:26 UTC

10Binary-Artifactsno binaries found in the repo
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-Tests12 out of 12 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 0/9 approved changesets -- score normalized to 0
0Contributorsproject has 0 contributing companies or organizations -- score normalized to 0
10Dangerous-Workflowno dangerous workflow patterns detected
10Dependency-Update-Toolupdate tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
10Maintained30 commit(s) and 1 issue activity found in the last 90 days -- score normalized to 10
10Packagingpackaging workflow detected
5Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 5
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
7Vulnerabilities3 existing vulnerabilities detected
Direct dependencies 1
RegistryPackageVersion constraintManifest
npmmutf-8^1.2.4packages/mutf-8-stream/package.json
All dependencies 182

Full resolved dependency set from the GitHub dependency graph: 1 direct and 181 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
npmmutf-8^1.2.4direct
npm@biomejs/biome2.5.6indirect
npm@biomejs/cli-darwin-arm642.5.6indirect
npm@biomejs/cli-darwin-x642.5.6indirect
npm@biomejs/cli-linux-arm642.5.6indirect
npm@biomejs/cli-linux-arm64-musl2.5.6indirect
npm@biomejs/cli-linux-x642.5.6indirect
npm@biomejs/cli-linux-x64-musl2.5.6indirect
npm@biomejs/cli-win32-arm642.5.6indirect
npm@biomejs/cli-win32-x642.5.6indirect
npm@emnapi/core1.11.1indirect
npm@emnapi/runtime1.11.1indirect
npm@emnapi/wasi-threads1.2.2indirect
npm@gerrit0/mini-shiki3.23.0indirect
npm@jridgewell/sourcemap-codec1.5.5indirect
npm@napi-rs/wasm-runtime1.1.6indirect
npm@nodelib/fs.scandir2.1.5indirect
npm@nodelib/fs.stat2.0.5indirect
npm@nodelib/fs.walk1.2.8indirect
npm@oxc-project/types0.139.0indirect
npm@rolldown/binding-android-arm641.1.5indirect
npm@rolldown/binding-darwin-arm641.1.5indirect
npm@rolldown/binding-darwin-x641.1.5indirect
npm@rolldown/binding-freebsd-x641.1.5indirect
npm@rolldown/binding-linux-arm-gnueabihf1.1.5indirect
npm@rolldown/binding-linux-arm64-gnu1.1.5indirect
npm@rolldown/binding-linux-arm64-musl1.1.5indirect
npm@rolldown/binding-linux-ppc64-gnu1.1.5indirect
npm@rolldown/binding-linux-s390x-gnu1.1.5indirect
npm@rolldown/binding-linux-x64-gnu1.1.5indirect
npm@rolldown/binding-linux-x64-musl1.1.5indirect
npm@rolldown/binding-openharmony-arm641.1.5indirect
npm@rolldown/binding-wasm32-wasi1.1.5indirect
npm@rolldown/binding-win32-arm64-msvc1.1.5indirect
npm@rolldown/binding-win32-x64-msvc1.1.5indirect
npm@rolldown/pluginutils1.0.1indirect
npm@shikijs/engine-oniguruma3.23.0indirect
npm@shikijs/langs3.23.0indirect
npm@shikijs/themes3.23.0indirect
npm@shikijs/types3.23.0indirect
npm@shikijs/vscode-textmate10.0.2indirect
npm@standard-schema/spec1.1.0indirect
npm@tybys/wasm-util0.10.3indirect
npm@types/chai5.2.3indirect
npm@types/deep-eql4.0.2indirect
npm@types/estree1.0.9indirect
npm@types/hast3.0.4indirect
npm@types/unist3.0.3indirect
npm@vitest/expect4.1.10indirect
npm@vitest/mocker4.1.10indirect
npm@vitest/pretty-format4.1.10indirect
npm@vitest/runner4.1.10indirect
npm@vitest/snapshot4.1.10indirect
npm@vitest/spy4.1.10indirect
npm@vitest/utils4.1.10indirect
npmansi-styles4.3.0indirect
npmansi-styles7.0.0indirect
npmargparse2.0.1indirect
npmarray-back6.2.3indirect
npmassertion-error2.0.1indirect
npmbalanced-match4.0.4indirect
npmbrace-expansion5.0.7indirect
npmbraces3.0.3indirect
npmchai6.2.2indirect
npmchalk4.1.2indirect
npmchalk5.6.2indirect
npmchalk-template0.4.0indirect
npmcolor-convert2.0.1indirect
npmcolor-name1.1.4indirect
npmcommand-line-args6.0.1indirect
npmcommand-line-usage7.0.4indirect
npmconvert-source-map2.0.0indirect
npmcpx29.0.0indirect
npmcross-spawn7.0.6indirect
npmcurrent-module-paths1.1.3indirect
npmdebounce3.0.0indirect
npmdetect-libc2.1.2indirect
npmentities4.5.0indirect
npmes-module-lexer2.1.0indirect
npmestree-walker3.0.3indirect
npmexpect-type1.3.0indirect
npmfast-diff1.3.0indirect
npmfast-glob3.3.3indirect
npmfastq1.20.1indirect
npmfdir6.5.0indirect
npmfile-set5.3.0indirect
npmfill-range7.1.1indirect
npmfind-index0.1.1indirect
npmfind-replace5.0.2indirect
npmfsevents2.3.3indirect
npmglob13.0.6indirect
npmglob-parent5.1.2indirect
npmglob2base0.0.12indirect
npmglobal-directory4.0.1indirect
npmhas-flag4.0.0indirect
npmignore7.0.5indirect
npmini4.1.1indirect
npmis-extglob2.1.1indirect
npmis-glob4.0.3indirect
npmis-number7.0.0indirect
npmisexe2.0.0indirect
npmisexe4.0.0indirect
npmjson-parse-even-better-errors6.0.0indirect
npmlightningcss1.33.0indirect
npmlightningcss-android-arm641.33.0indirect
npmlightningcss-darwin-arm641.33.0indirect
npmlightningcss-darwin-x641.33.0indirect
npmlightningcss-freebsd-x641.33.0indirect
npmlightningcss-linux-arm-gnueabihf1.33.0indirect
npmlightningcss-linux-arm64-gnu1.33.0indirect
npmlightningcss-linux-arm64-musl1.33.0indirect
npmlightningcss-linux-x64-gnu1.33.0indirect
npmlightningcss-linux-x64-musl1.33.0indirect
npmlightningcss-win32-arm64-msvc1.33.0indirect
npmlightningcss-win32-x64-msvc1.33.0indirect
npmlinkify-it5.0.2indirect
npmload-module5.0.0indirect
npmlodash.camelcase4.3.0indirect
npmlru-cache11.1.0indirect
npmlunr2.3.9indirect
npmmagic-string0.30.21indirect
npmmarkdown-it14.3.0indirect
npmmdurl2.0.0indirect
npmmemorystream0.3.1indirect
npmmerge21.4.1indirect
npmmicromatch4.0.8indirect
npmminimatch10.2.5indirect
npmminimist1.2.8indirect
npmminipass7.1.3indirect
npmnanoid3.3.18indirect
npmnpm-normalize-package-bin6.0.0indirect
npmnpm-run-all29.0.3indirect
npmobug2.1.1indirect
npmp-map7.0.3indirect
npmpackage-json-from-dist1.0.1indirect
npmpackages/mutf-81.2.4indirect
npmpackages/mutf-8-stream1.2.4indirect
npmpath-key3.1.1indirect
npmpath-scurry2.0.2indirect
npmpathe2.0.3indirect
npmpicocolors1.1.1indirect
npmpicomatch2.3.2indirect
npmpicomatch4.0.5indirect
npmpidtree1.0.0indirect
npmpostcss8.5.26indirect
npmprintj1.3.1indirect
npmpunycode.js2.3.1indirect
npmqueue-microtask1.2.3indirect
npmread-package-json-fast6.0.0indirect
npmrenamer5.0.3indirect
npmreusify1.1.0indirect
npmrimraf6.1.3indirect
npmrolldown1.1.5indirect
npmrun-parallel1.2.0indirect
npmshebang-command2.0.0indirect
npmshebang-regex3.0.0indirect
npmshell-quote1.10.0indirect
npmsiginfo2.0.0indirect
npmsource-map-js1.2.1indirect
npmstackback0.0.2indirect
npmstd-env4.1.0indirect
npmstream-read-all5.0.2indirect
npmsubarg1.0.0indirect
npmsupports-color7.2.0indirect
npmtable-layout4.1.1indirect
npmtinybench2.9.0indirect
npmtinyexec1.0.2indirect
npmtinyglobby0.2.17indirect
npmtinyrainbow3.1.0indirect
npmto-regex-range5.0.1indirect
npmtslib2.8.1indirect
npmtypedoc0.28.20indirect
npmtypescript6.0.3indirect
npmtypical7.3.0indirect
npmuc.micro2.1.0indirect
npmvite8.1.5indirect
npmvitest4.1.10indirect
npmwhich2.0.2indirect
npmwhich7.0.0indirect
npmwhy-is-node-running2.3.0indirect
npmwordwrapjs5.1.1indirect
npmyaml2.9.0indirect
Dependency advisories 3

This repository publishes no package the index resolves, so its own dependency graph was assessed — 181 packages, which also include development and test pins that never ship: 3 carry known advisories, of which 0 are direct. 1 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list.

PackageVersionRelationSeverityAdvisoriesFixed in
brace-expansion5.0.7indirecthigh25.0.9
@vitest/mocker4.1.10indirectmoderate15.0.0-rc.2
vitest4.1.10indirectmoderate15.0.0-rc.2

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.

The message is kept through sign-in.

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 statisticsnpm.