Public record
Software health reportschema 0.31.0 · metrics 2.10.0 · 2026-08-04 19:39 UTC

postcss / autoprefixer

Parse CSS and add vendor prefixes to rules by Can I Use

JavaScript · CSSMIT★ 22,251 stars⑂ 1,291 forkssince Mar 2013View on GitHub ↗
KindLibraryCommand-line toolhow this is determined

postcss/autoprefixer holds a health index of 34 out of 100, placing it in the At Risk band. It scores highest on Community & Adoption (89/100) and lowest on AI Readiness (32/100). It was last updated 12 days ago. A single contributor accounts for most of its recent work.

34
overall / 100
At Risk

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.

34
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 70 is calibrated to 83 on the published index scale (record calibration 2026-08-02). High-Risk Jurisdiction Policy applies a 75% multiplier to weighted overall health and gives it an At Risk ceiling of 34.

Ownership

PostCSSOrganization
428 followers57 public repossince Jul 2014

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

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
npmautoprefixer10.5.4262,488,36525619 days agoautoprefixercsspostcsspostcss-pluginprefix

Metrics by category

Vitality

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

76Good · 21% of overall
How it's scored
28.8/36Push recencylast push 12 days ago
6.2/36Commit cadence9/52 weeks with commits
15.5/18Commit volume52 commits in the last year
10/10OpenSSF Scorecard: Maintained25 commit(s) and 2 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year52
human_commit_share1
days_since_last_push12
active_weeks_last_year9

Release discipline

100Exceptional
How it's scored
27/27Ships releases100 releases published
36/36Release recencylatest release 19 days ago
27/27Release cadencea release every ~23.7 days
0/10OpenSSF Scorecard: Signed-Releasesno data
Inputs used
releases_count100
latest_release_tag10.5.4
releases_from_tagsno
days_since_latest_release19
mean_days_between_releases23.7
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?

89Excellent · 17% of overall
How it's scored
60/60Stars22,251 stars
25/25Forks1,291 forks
14.2/15Watchers360 watchers
Inputs used
forks1,291
stars22,251
watchers360
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history
How it's scored
22.5/22.5README
22.5/22.5Licenserecognized license (MIT)
18/18CONTRIBUTING guide
0/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges0
has_contributingyes
has_issue_templateno
has_code_of_conductno
readme_badge_services
has_pull_request_templateno
How it's scored
80/80Monthly downloads262,488,365 downloads/month across npm
0/20Registry dependentsnot reported by this ecosystem
Inputs used
packagesautoprefixer
dependents
ecosystemsnpm
total_downloads
monthly_downloads262,488,365
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?

74Good · 23% of overall
How it's scored
9/54Bus factor1 contributor(s) cover half of all commits
2.5/22.5Commit distributiontop contributor authored 89% of commits
13.5/13.5Contributor breadth100 contributors
10/10OpenSSF Scorecard: Contributorsproject has 35 contributing companies or organizations
Inputs used
bus_factor1
contributors_sampled100
top_contributor_share0.89
How it's scored
40.7/42Issue resolution97% of issues closed
24.4/30PR acceptance286/351 decided PRs merged
13/13Newcomer PR acceptance1/1 first-time contributors' PRs merged in 30d
1.5/15OpenSSF Scorecard: Code-ReviewFound 3/30 approved changesets -- score normalized to 1
Inputs used
merged_prs286
open_issues37
closed_issues1,132
prs_merged_7d0
prs_decided_7d0
prs_merged_30d1
prs_decided_30d1
issue_closed_ratio0.968
closed_unmerged_prs65
first_time_authors_30d1
first_time_prs_merged_30d1
first_time_prs_decided_30d1
How it's scored
30/30Ownership backingorganization-owned
0/20Verified domainverified-domain status not read for this organization
18.9/25Owner reach428 followers of postcss
24.8/25Track record57 public repos, account ~12 yr old
Inputs used
followers428
owner_typeOrganization
is_verified
owner_loginpostcss
public_repos57
account_age_days4,389
Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable1 package(s) on npm
35/35Publish recencylatest publish 19 days ago
20/20Version history256 published versions
20/20Not deprecatedactive, not deprecated or yanked
Inputs used
packagesautoprefixer
ecosystemsnpm
any_deprecatedno
min_days_since_publish19

Engineering Quality

Are baseline engineering and documentation practices in place?

70Good · 19% of overall
How it's scored
24/24CI workflows2 workflow(s)
24/24Tests present
0/16Linter config
0/9.6Pre-commit hooks
6.4/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests3 out of 3 merged PRs checked by a CI test -- score normalized to 10
Inputs used
has_ciyes
has_testsyes
has_editorconfigyes
has_linter_configno
has_precommit_configno
How it's scored
30/30README
0/25Documentation directory
15/15Documentation / homepage sitehttps://twitter.com/autoprefixer
10/10Repository description
10/10Topics3 topics
0/10Wiki
Inputs used
topicscss, postcss-plugins, prefixer
has_wikino
homepagehttps://twitter.com/autoprefixer
docs_sitehttps://twitter.com/autoprefixer
has_readmeyes
has_docs_dirno
has_descriptionyes

Security

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

47Weak · 16% of overall
How it's scored
7.5/7.5Binary-Artifactsno binaries found in the repo
0/7.5Branch-Protectionbranch protection not enabled on development/release branches
2.5/2.5CI-Tests3 out of 3 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
0.8/7.5Code-ReviewFound 3/30 approved changesets -- score normalized to 1
2.5/2.5Contributorsproject has 35 contributing companies or organizations
10/10Dangerous-Workflowno dangerous workflow patterns detected
0/7.5Dependency-Update-Toolno update tool detected
0/5Fuzzingproject is not fuzzed
2.5/2.5Licenselicense file detected
7.5/7.5Maintained25 commit(s) and 2 issue activity found in the last 90 days -- score normalized to 10
0/5Packagingno data
5/5Pinned-Dependenciesall dependencies are pinned
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
6.8/7.5Token-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_aggregate5.4
high_risk_jurisdiction_cap34
high_risk_jurisdiction_multiplier75
security_posture_after_multiplier40
security_posture_before_jurisdiction54
Excluded from scoring (no data or not applicable): Packaging, Signed-Releases. Remaining weights renormalized. High-Risk Jurisdiction Policy applies a 75% multiplier and gives Security posture an At risk ceiling of 34.

Dependency advisories

100Exceptional
How it's scored
35/35Direct dependencies free of known advisoriesno direct dependency carries a known advisory
25/25Indirect dependencies free of known advisoriesno indirect dependency carries a known advisory
0/40No advisories left outstandingno advisory carries a publication date
Inputs used
sourceosv
advisories0
affected_packages0
assessed_packages10
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:autoprefixer@10.5.4 runtime dependency closure — what installing the published package pulls in — 10 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.

32At Risk · 4% of overall
How it's scored
0/45Agent instructionsno CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
8/40Legible commit history15 of 100 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url
legible_history_share0.15
agent_instruction_files
agent_instruction_max_bytes
How it's scored
0/18One-command bootstrap
22/22Automated tests
0/11Lint / format config
0/11Static type checking
10/10Reproducible environmentlockfile
0/10Demonstrated agent practiceno agent-authored commits among the last 100
0/8Automated maintenanceno automated dependency updates observed
10/10OpenSSF Scorecard: Pinned-Dependenciesall dependencies are pinned
Inputs used
has_nixno
has_testsyes
lockfilespnpm-lock.yaml
has_dockerfileno
typed_languageno
bootstrap_files
has_devcontainerno
has_linter_configno
typecheck_configs
agent_commit_share0
toolchain_manifests
dependency_bot_commit_share0
How it's scored
0/45Type-checkable codeJavaScript without a type-check config
55/55Manageable file sizes0/97 source files over 60KB
Inputs used
primary_languageJavaScript
largest_source_bytes36,391
source_files_sampled97
oversized_source_files0

Key facts

22,251GitHub stars
100contributors
52commits, last 12 months
12days since last push
100releases
1bus factor
37open 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 ★ / 1,291 ⇿
0Stars
1,291Forks
100Releases

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.

Only the most recent history is shown — this repository exceeds the collection window, so the earliest history is not captured.

2004006008001,0001,2001,4001,291102015-112021-032026-07
Major 1Minor 13Patch 86

Each point covers 10 days.

OpenSSF Scorecard 5.4 / 10
5.4aggregate

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 · 2026-08-04 19:39 UTC

10Binary-Artifactsno binaries found in the repo
0Branch-Protectionbranch protection not enabled on development/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
1Code-ReviewFound 3/30 approved changesets -- score normalized to 1
10Contributorsproject has 35 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
0Dependency-Update-Toolno update tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
10Maintained25 commit(s) and 2 issue activity found in the last 90 days -- score normalized to 10
n/aPackagingpackaging workflow not detected
10Pinned-Dependenciesall dependencies are pinned
0SASTSAST tool is not run on all commits -- score normalized to 0
0Security-Policysecurity policy file not detected
n/aSigned-Releasesno releases found
9Token-Permissionsdetected GitHub workflow tokens with excessive permissions
7Vulnerabilities3 existing vulnerabilities detected
Direct dependencies 5
RegistryPackageVersion constraintManifest
npmbrowserslist^4.28.6package.json
npmcaniuse-lite^1.0.30001806package.json
npmfraction.js^5.3.4package.json
npmpicocolors^1.1.1package.json
npmpostcss-value-parser^4.2.0package.json
All dependencies 167

Full resolved dependency set from the GitHub dependency graph: 5 direct and 162 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
npmbrowserslist4.28.6direct
npmcaniuse-lite1.0.30001806direct
npmfraction.js5.3.4direct
npmpicocolors1.1.1direct
npmpostcss-value-parser4.2.0direct
npm@bcoe/v8-coverage1.0.2indirect
npm@esbuild/aix-ppc640.28.1indirect
npm@esbuild/android-arm0.28.1indirect
npm@esbuild/android-arm640.28.1indirect
npm@esbuild/android-x640.28.1indirect
npm@esbuild/darwin-arm640.28.1indirect
npm@esbuild/darwin-x640.28.1indirect
npm@esbuild/freebsd-arm640.28.1indirect
npm@esbuild/freebsd-x640.28.1indirect
npm@esbuild/linux-arm0.28.1indirect
npm@esbuild/linux-arm640.28.1indirect
npm@esbuild/linux-ia320.28.1indirect
npm@esbuild/linux-loong640.28.1indirect
npm@esbuild/linux-mips64el0.28.1indirect
npm@esbuild/linux-ppc640.28.1indirect
npm@esbuild/linux-riscv640.28.1indirect
npm@esbuild/linux-s390x0.28.1indirect
npm@esbuild/linux-x640.28.1indirect
npm@esbuild/netbsd-arm640.28.1indirect
npm@esbuild/netbsd-x640.28.1indirect
npm@esbuild/openbsd-arm640.28.1indirect
npm@esbuild/openbsd-x640.28.1indirect
npm@esbuild/openharmony-arm640.28.1indirect
npm@esbuild/sunos-x640.28.1indirect
npm@esbuild/win32-arm640.28.1indirect
npm@esbuild/win32-ia320.28.1indirect
npm@esbuild/win32-x640.28.1indirect
npm@istanbuljs/schema0.1.6indirect
npm@jridgewell/resolve-uri3.1.2indirect
npm@jridgewell/sourcemap-codec1.5.5indirect
npm@jridgewell/trace-mapping0.3.31indirect
npm@logux/oxc-configs0.4.1indirect
npm@oxlint-tsgolint/darwin-arm640.24.0indirect
npm@oxlint-tsgolint/darwin-x640.24.0indirect
npm@oxlint-tsgolint/linux-arm640.24.0indirect
npm@oxlint-tsgolint/linux-x640.24.0indirect
npm@oxlint-tsgolint/win32-arm640.24.0indirect
npm@oxlint-tsgolint/win32-x640.24.0indirect
npm@oxlint/binding-android-arm-eabi1.74.0indirect
npm@oxlint/binding-android-arm641.74.0indirect
npm@oxlint/binding-darwin-arm641.74.0indirect
npm@oxlint/binding-darwin-x641.74.0indirect
npm@oxlint/binding-freebsd-x641.74.0indirect
npm@oxlint/binding-linux-arm-gnueabihf1.74.0indirect
npm@oxlint/binding-linux-arm-musleabihf1.74.0indirect
npm@oxlint/binding-linux-arm64-gnu1.74.0indirect
npm@oxlint/binding-linux-arm64-musl1.74.0indirect
npm@oxlint/binding-linux-ppc64-gnu1.74.0indirect
npm@oxlint/binding-linux-riscv64-gnu1.74.0indirect
npm@oxlint/binding-linux-riscv64-musl1.74.0indirect
npm@oxlint/binding-linux-s390x-gnu1.74.0indirect
npm@oxlint/binding-linux-x64-gnu1.74.0indirect
npm@oxlint/binding-linux-x64-musl1.74.0indirect
npm@oxlint/binding-openharmony-arm641.74.0indirect
npm@oxlint/binding-win32-arm64-msvc1.74.0indirect
npm@oxlint/binding-win32-ia32-msvc1.74.0indirect
npm@oxlint/binding-win32-x64-msvc1.74.0indirect
npm@size-limit/esbuild12.1.0indirect
npm@size-limit/file12.1.0indirect
npm@size-limit/preset-small-lib12.1.0indirect
npm@types/istanbul-lib-coverage2.0.6indirect
npm@typescript/typescript-aix-ppc647.0.2indirect
npm@typescript/typescript-darwin-arm647.0.2indirect
npm@typescript/typescript-darwin-x647.0.2indirect
npm@typescript/typescript-freebsd-arm647.0.2indirect
npm@typescript/typescript-freebsd-x647.0.2indirect
npm@typescript/typescript-linux-arm7.0.2indirect
npm@typescript/typescript-linux-arm647.0.2indirect
npm@typescript/typescript-linux-loong647.0.2indirect
npm@typescript/typescript-linux-mips64el7.0.2indirect
npm@typescript/typescript-linux-ppc647.0.2indirect
npm@typescript/typescript-linux-riscv647.0.2indirect
npm@typescript/typescript-linux-s390x7.0.2indirect
npm@typescript/typescript-linux-x647.0.2indirect
npm@typescript/typescript-netbsd-arm647.0.2indirect
npm@typescript/typescript-netbsd-x647.0.2indirect
npm@typescript/typescript-openbsd-arm647.0.2indirect
npm@typescript/typescript-openbsd-x647.0.2indirect
npm@typescript/typescript-sunos-x647.0.2indirect
npm@typescript/typescript-win32-arm647.0.2indirect
npm@typescript/typescript-win32-x647.0.2indirect
npmactions-up1.16.0indirect
npmansi-colors4.1.3indirect
npmansi-regex5.0.1indirect
npmansi-styles4.3.0indirect
npmbalanced-match4.0.4indirect
npmbaseline-browser-mapping2.10.43indirect
npmbrace-expansion5.0.7indirect
npmbytes-iec3.1.1indirect
npmc811.0.0indirect
npmcliui8.0.1indirect
npmcolor-convert2.0.1indirect
npmcolor-name1.1.4indirect
npmconvert-source-map2.0.0indirect
npmcross-spawn7.0.6indirect
npmdequal2.0.3indirect
npmdiff5.2.2indirect
npmelectron-to-chromium1.5.392indirect
npmemoji-regex8.0.0indirect
npmenquirer2.4.1indirect
npmesbuild0.28.1indirect
npmescalade3.2.0indirect
npmeslint-plugin-prefer-let4.2.2indirect
npmfdir6.5.0indirect
npmfind-up5.0.0indirect
npmforeground-child3.3.1indirect
npmget-caller-file2.0.5indirect
npmglob13.0.6indirect
npmhas-flag4.0.0indirect
npmhtml-escaper2.0.2indirect
npmis-fullwidth-code-point3.0.0indirect
npmisexe2.0.0indirect
npmistanbul-lib-coverage3.2.2indirect
npmistanbul-lib-report3.0.1indirect
npmistanbul-reports3.2.0indirect
npmkleur4.1.5indirect
npmlilconfig3.1.3indirect
npmlocate-path6.0.0indirect
npmlru-cache11.5.2indirect
npmmake-dir4.0.0indirect
npmminimatch10.2.5indirect
npmminipass7.1.3indirect
npmmri1.2.0indirect
npmnanoid3.3.16indirect
npmnanoid5.1.16indirect
npmnanospinner1.2.2indirect
npmnanospy2.0.2indirect
npmnode-releases2.0.51indirect
npmoxlint1.74.0indirect
npmoxlint-tsgolint0.24.0indirect
npmp-limit3.1.0indirect
npmp-locate5.0.0indirect
npmpath-exists4.0.0indirect
npmpath-key3.1.1indirect
npmpath-scurry2.0.2indirect
npmpicomatch4.0.5indirect
npmpostcss8.5.19indirect
npmrequire-directory2.1.1indirect
npmrequireindex1.2.0indirect
npmsade1.8.1indirect
npmsemver7.8.5indirect
npmshebang-command2.0.0indirect
npmshebang-regex3.0.0indirect
npmsignal-exit4.1.0indirect
npmsize-limit12.1.0indirect
npmsource-map-js1.2.1indirect
npmstring-width4.2.3indirect
npmstrip-ansi6.0.1indirect
npmsupports-color7.2.0indirect
npmtest-exclude8.0.0indirect
npmtinyglobby0.2.17indirect
npmtypescript7.0.2indirect
npmupdate-browserslist-db1.2.3indirect
npmuvu0.5.6indirect
npmv8-to-istanbul9.3.0indirect
npmwhich2.0.2indirect
npmwrap-ansi7.0.0indirect
npmy18n5.0.8indirect
npmyaml2.9.0indirect
npmyargs17.7.3indirect
npmyargs-parser21.1.1indirect
npmyocto-queue0.1.0indirect
Dependency advisories 0

Installing npm:autoprefixer@10.5.4 pulls in 10 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.

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 v0.31.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statisticsnpm.