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

jupyterlab / jupyter-builder

Build tools for JupyterLab (and remixes)

Python · TypeScriptBSD-3-Clause★ 13 stars⑂ 9 forkssince Mar 2024View on GitHub ↗
KindLibraryCommand-line toolhow this is determined
#build-tools#jupyterlab-extension

jupyterlab/jupyter-builder holds a health index of 81 out of 100, placing it in the Excellent band. It scores highest on Vitality (80/100) and lowest on AI Readiness (46/100). It was last updated today. A single contributor accounts for most of its recent work.

81
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.

81
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 69 is calibrated to 81 on the published index scale (record calibration 2026-08-02).

Ownership

JupyterLabOrganization
1,578 followers67 public repossince Oct 2016

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

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
npm@jupyter/builder1.1.1115,464150 days agojupyterjupyterlab
PyPIjupyter_builder1.1.1-190 days agoipythonjupyter

Metrics by category

Vitality

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

80Excellent · 21% of overall

Development activity

74Good
How it's scored
36/36Push recency — last push 0 days ago
11.1/36Commit cadence — 16/52 weeks with commits
16.9/18Commit volume — 75 commits in the last year
10/10OpenSSF Scorecard: Maintained — 30 commit(s) and 24 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year75
human_commit_share—
days_since_last_push0
active_weeks_last_year16

Release discipline

90Excellent
How it's scored
27/27Ships releases — 19 releases published
36/36Release recency — latest release 0 days ago
27/27Release cadence — a release every ~10.8 days
0/10OpenSSF Scorecard: Signed-Releases — Project has not signed or included provenance with any releases.
Inputs used
releases_count19
latest_release_tagv1.1.1
releases_from_tagsno
days_since_latest_release0
mean_days_between_releases10.8

Community & Adoption

Does the project have users, downloads, attention, and a welcoming setup for contributors?

55Moderate · 17% of overall

Popularity & adoption

28At Risk
How it's scored
17.5/60Stars — 13 stars
7.5/25Forks — 9 forks
2.7/15Watchers — 4 watchers
Inputs used
forks9
stars13
watchers4
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

65Good
How it's scored
22.5/22.5README
22.5/22.5License — recognized license (BSD-3-Clause)
0/18CONTRIBUTING guide
13.5/13.5Code 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_conductyes
readme_badge_services—
has_pull_request_templateno

Ecosystem adoption (downloads)

84Excellent
How it's scored
67.5/80Monthly downloads — 115,464 downloads/month across npm, pypi
0/20Registry dependents — not reported by this ecosystem
Inputs used
packages@jupyter/builder, jupyter_builder
dependents—
ecosystemsnpm, pypi
total_downloads—
monthly_downloads115,464
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?

77Good · 23% of overall

Maintainer resilience (bus factor)

40Weak
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
10.6/22.5Commit distribution — top contributor authored 53% of commits
10.8/13.5Contributor breadth — 8 contributors
10/10OpenSSF Scorecard: Contributors — project has 36 contributing companies or organizations
Inputs used
bus_factor1
contributors_sampled8
top_contributor_share0.529

Issue & PR responsiveness

81Excellent
How it's scored
33.3/42Issue resolution — 79% of issues closed
24.8/30PR acceptance — 81/98 decided PRs merged
0/13Newcomer PR acceptance — no first-time contributor's PR decided in 30d
12/15OpenSSF Scorecard: Code-Review — Found 20/25 approved changesets -- score normalized to 8
Inputs used
merged_prs81
open_issues10
closed_issues38
prs_merged_7d—
prs_decided_7d—
prs_merged_30d—
prs_decided_30d—
issue_closed_ratio0.792
closed_unmerged_prs17
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

98Exceptional
How it's scored
30/30Ownership backing — organization-owned
0/20Verified domain — verified-domain status not read for this organization
23/25Owner reach — 1,578 followers of jupyterlab
25/25Track record — 67 public repos, account ~9 yr old
Inputs used
followers1,578
owner_typeOrganization
is_verified—
owner_loginjupyterlab
public_repos67
account_age_days3,565
Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable — 2 package(s) on npm, pypi
35/35Publish recency — latest publish 0 days ago
20/20Version history — 19 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packages@jupyter/builder, jupyter_builder
ecosystemsnpm, pypi
any_deprecatedno
min_days_since_publish0

Engineering Quality

Are baseline engineering and documentation practices in place?

76Good · 19% of overall

Engineering practices

94Exceptional
How it's scored
24/24CI workflows — 8 workflow(s)
24/24Tests present
16/16Linter config — eslint.config.mjs
9.6/9.6Pre-commit hooks
0/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests — 25 out of 25 merged PRs checked by a CI test -- score normalized to 10
Inputs used
has_ciyes
has_testsyes
has_editorconfigno
has_linter_configyes
has_precommit_configyes

Documentation

50Moderate
How it's scored
30/30README
0/25Documentation directory
0/15Documentation / homepage site
10/10Repository description
10/10Topics — 2 topics
0/10Wiki
Inputs used
topicsbuild-tools, jupyterlab-extension
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?

58Moderate · 16% of overall

Security posture

58Moderate
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 — 25 out of 25 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
6/7.5Code-Review — Found 20/25 approved changesets -- score normalized to 8
2.5/2.5Contributors — project has 36 contributing companies or organizations
10/10Dangerous-Workflow — no dangerous workflow patterns detected
7.5/7.5Dependency-Update-Tool — update tool detected
0/5Fuzzing — project is not fuzzed
2.5/2.5License — license file detected
7.5/7.5Maintained — 30 commit(s) and 24 issue activity found in the last 90 days -- score normalized to 10
0/5Packaging — no data
0/5Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0
0/5SAST — SAST tool is not run on all commits -- score normalized to 0
5/5Security-Policy — security policy file detected
0/7.5Signed-Releases — Project has not signed or included provenance with any releases.
0/7.5Token-Permissions — detected GitHub workflow tokens with excessive permissions
5.2/7.5Vulnerabilities — 3 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated17
scorecard_versionv5.5.0
checks_inconclusive1
scorecard_aggregate5.8
Excluded from scoring (no data or not applicable): Packaging. 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.

46Weak · 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)

66Good
How it's scored
0/18One-command bootstrap
22/22Automated tests
11/11Lint / format config — eslint.config.mjs
11/11Static type checking — jupyter_builder/py.typed, tsconfig.json
10/10Reproducible environment — lockfile
0/10Demonstrated agent practice — no data
5/8Automated maintenance — dependency automation configured, none observed in the sampled commits
0/10OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0
Inputs used
has_nixno
has_testsyes
lockfilesyarn.lock
has_dockerfileno
typed_languageno
bootstrap_files—
has_devcontainerno
has_linter_configyes
typecheck_configsjupyter_builder/py.typed, tsconfig.json
agent_commit_share—
toolchain_manifests—
dependency_bot_commit_share0
Excluded from scoring (no data or not applicable): Demonstrated agent practice. Remaining weights renormalized.

Code legibility for models

80Excellent
How it's scored
27/45Type-checkable code — Python with type-check config (jupyter_builder/py.typed, tsconfig.json)
53.2/55Manageable file sizes — 1/30 source files over 60KB
Inputs used
primary_languagePython
largest_source_bytes2,233,059
source_files_sampled30
oversized_source_files1

Key facts

13GitHub stars
8contributors
75commits, last 12 months
0days since last push
19releases
1bus factor
10open issues
npm, PyPIpackage ecosystems

More detail

OpenSSF Scorecard 5.8 / 10
5.8aggregate

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 12:59 UTC

10Binary-Artifactsno binaries found in the repo
3Branch-Protectionbranch protection is not maximal on development and all release branches
10CI-Tests25 out of 25 merged PRs checked by a CI test -- score normalized to 10
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
8Code-ReviewFound 20/25 approved changesets -- score normalized to 8
10Contributorsproject has 36 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
10Dependency-Update-Toolupdate tool detected
0Fuzzingproject is not fuzzed
10Licenselicense file detected
10Maintained30 commit(s) and 24 issue activity found in the last 90 days -- score normalized to 10
n/aPackagingpackaging workflow not detected
0Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
0SASTSAST tool is not run on all commits -- score normalized to 0
10Security-Policysecurity policy file detected
0Signed-ReleasesProject has not signed or included provenance with any releases.
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
7Vulnerabilities3 existing vulnerabilities detected
Direct dependencies 19
RegistryPackageVersion constraintManifest
npm@jupyterlab/core-meta4.6.1package.json
npm@module-federation/runtime-tools^2.0.0package.json
npm@rspack/core^2.1.2package.json
npmajv^8.12.0package.json
npmcommander^9.4.1package.json
npmcss-loader^7.1.4package.json
npmduplicate-package-checker-webpack-plugin^3.0.0package.json
npmfs-extra^10.1.0package.json
npmglob^13.0.6package.json
npmlicense-webpack-plugin^4.0.2package.json
npmmini-svg-data-uri^1.4.4package.json
npmpath-browserify^1.0.0package.json
npmprocess^0.11.10package.json
npmstyle-loader^4.0.0package.json
npmsupports-color^7.2.0package.json
npmwebpack-merge^5.8.0package.json
PyPItraitlets—pyproject.toml
PyPIjupyter-core—pyproject.toml
PyPItomli—pyproject.toml
All dependencies 358

Full resolved dependency set from the GitHub dependency graph: 19 direct and 339 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
npm@jupyterlab/core-meta4.6.1direct
npm@module-federation/runtime-tools2.4.0direct
npm@rspack/core2.1.2direct
npmajv6.15.0direct
npmajv8.20.0direct
npmcommander9.5.0direct
npmcss-loader7.1.4direct
npmduplicate-package-checker-webpack-plugin3.0.0direct
npmfs-extra10.1.0direct
npmglob10.5.0direct
npmglob13.0.6direct
npmlicense-webpack-plugin4.0.2direct
npmmini-svg-data-uri1.4.4direct
npmpath-browserify1.0.1direct
npmprocess0.11.10direct
npmstyle-loader4.0.0direct
npmsupports-color5.5.0direct
npmsupports-color7.2.0direct
npmwebpack-merge5.10.0direct
npm@emnapi/core1.11.1indirect
npm@emnapi/runtime1.11.1indirect
npm@emnapi/wasi-threads1.2.2indirect
npm@eslint-community/eslint-utils4.9.1indirect
npm@eslint-community/regexpp4.12.2indirect
npm@eslint/config-array0.21.2indirect
npm@eslint/config-helpers0.4.2indirect
npm@eslint/core0.17.0indirect
npm@eslint/eslintrc3.3.5indirect
npm@eslint/js10.0.1indirect
npm@eslint/js9.39.4indirect
npm@eslint/object-schema2.1.7indirect
npm@eslint/plugin-kit0.4.1indirect
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@isaacs/cliui8.0.2indirect
npm@module-federation/error-codes2.4.0indirect
npm@module-federation/runtime2.4.0indirect
npm@module-federation/runtime-core2.4.0indirect
npm@module-federation/sdk2.4.0indirect
npm@module-federation/webpack-bundler-runtime2.4.0indirect
npm@napi-rs/wasm-runtime1.1.6indirect
npm@pkgjs/parseargs0.11.0indirect
npm@pkgr/core0.2.9indirect
npm@rspack/binding2.1.2indirect
npm@rspack/binding-darwin-arm642.1.2indirect
npm@rspack/binding-darwin-x642.1.2indirect
npm@rspack/binding-linux-arm64-gnu2.1.2indirect
npm@rspack/binding-linux-arm64-musl2.1.2indirect
npm@rspack/binding-linux-riscv64-gnu2.1.2indirect
npm@rspack/binding-linux-riscv64-musl2.1.2indirect
npm@rspack/binding-linux-x64-gnu2.1.2indirect
npm@rspack/binding-linux-x64-musl2.1.2indirect
npm@rspack/binding-wasm32-wasi2.1.2indirect
npm@rspack/binding-win32-arm64-msvc2.1.2indirect
npm@rspack/binding-win32-ia32-msvc2.1.2indirect
npm@rspack/binding-win32-x64-msvc2.1.2indirect
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npm@typescript-eslint/scope-manager8.59.2indirect
npm@typescript-eslint/tsconfig-utils8.59.2indirect
npm@typescript-eslint/type-utils8.59.2indirect
npm@typescript-eslint/types8.59.2indirect
npm@typescript-eslint/typescript-estree8.59.2indirect
npm@typescript-eslint/utils8.59.2indirect
npm@typescript-eslint/visitor-keys8.59.2indirect
npmacorn8.16.0indirect
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npmchalk2.4.2indirect
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npmclone-deep4.0.1indirect
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npmis-weakset2.0.4indirect
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npmisexe2.0.0indirect
npmisobject3.0.1indirect
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npmlru-cache11.5.1indirect
npmmath-intrinsics1.1.0indirect
npmmemorystream0.3.1indirect
npmminimatch10.2.5indirect
npmminimatch3.1.5indirect
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npmminipass7.1.3indirect
npmms2.1.3indirect
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npmp-locate5.0.0indirect
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npmparse-json4.0.0indirect
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npmpath-scurry1.11.1indirect
npmpath-scurry2.0.2indirect
npmpath-type3.0.0indirect
npmpicocolors1.1.1indirect
npmpicomatch4.0.4indirect
npmpidtree0.3.1indirect
npmpify3.0.0indirect
npmpossible-typed-array-names1.1.0indirect
npmpostcss8.5.15indirect
npmpostcss-modules-extract-imports3.1.0indirect
npmpostcss-modules-local-by-default4.2.0indirect
npmpostcss-modules-scope3.2.1indirect
npmpostcss-modules-values4.0.0indirect
npmpostcss-selector-parser7.1.4indirect
npmpostcss-value-parser4.2.0indirect
npmprelude-ls1.2.1indirect
npmprettier3.8.3indirect
npmprettier-linter-helpers1.0.1indirect
npmpunycode2.3.1indirect
npmread-pkg3.0.0indirect
npmreflect.getprototypeof1.0.10indirect
npmregexp.prototype.flags1.5.4indirect
npmrequire-from-string2.0.2indirect
npmresolve1.22.12indirect
npmresolve-from4.0.0indirect
npmrimraf5.0.10indirect
npmsafe-array-concat1.1.4indirect
npmsafe-push-apply1.0.0indirect
npmsafe-regex-test1.1.0indirect
npmsemver5.7.2indirect
npmsemver7.7.4indirect
npmsemver7.8.5indirect
npmset-function-length1.2.2indirect
npmset-function-name2.0.2indirect
npmset-proto1.0.0indirect
npmshallow-clone3.0.1indirect
npmshebang-command1.2.0indirect
npmshebang-command2.0.0indirect
npmshebang-regex1.0.0indirect
npmshebang-regex3.0.0indirect
npmshell-quote1.8.3indirect
npmside-channel1.1.0indirect
npmside-channel-list1.0.1indirect
npmside-channel-map1.0.1indirect
npmside-channel-weakmap1.0.2indirect
npmsignal-exit4.1.0indirect
npmsource-map-js1.2.1indirect
npmspdx-correct3.2.0indirect
npmspdx-exceptions2.5.0indirect
npmspdx-expression-parse3.0.1indirect
npmspdx-license-ids3.0.23indirect
npmstop-iteration-iterator1.1.0indirect
npmstring-width5.1.2indirect
npmstring-width-cjs4.2.3indirect
npmstring.prototype.padend3.1.6indirect
npmstring.prototype.trim1.2.10indirect
npmstring.prototype.trimend1.0.9indirect
npmstring.prototype.trimstart1.0.8indirect
npmstrip-ansi7.2.0indirect
npmstrip-ansi-cjs6.0.1indirect
npmstrip-bom3.0.0indirect
npmstrip-json-comments3.1.1indirect
npmsupports-preserve-symlinks-flag1.0.0indirect
npmsynckit0.11.12indirect
npmtinyglobby0.2.16indirect
npmts-api-utils2.5.0indirect
npmtslib2.8.1indirect
npmtype-check0.4.0indirect
npmtyped-array-buffer1.0.3indirect
npmtyped-array-byte-length1.0.3indirect
npmtyped-array-byte-offset1.0.4indirect
npmtyped-array-length1.0.7indirect
npmtypescript5.9.3indirect
npmtypescript-eslint8.59.2indirect
npmunbox-primitive1.1.0indirect
npmundici-types6.21.0indirect
npmundici-types7.19.2indirect
npmuniversalify2.0.1indirect
npmuri-js4.4.1indirect
npmutil-deprecate1.0.2indirect
npmvalidate-npm-package-license3.0.4indirect
npmwebpack-sources3.4.1indirect
npmwhich1.3.1indirect
npmwhich2.0.2indirect
npmwhich-boxed-primitive1.1.1indirect
npmwhich-builtin-type1.2.1indirect
npmwhich-collection1.0.2indirect
npmwhich-typed-array1.1.20indirect
npmwildcard2.0.1indirect
npmword-wrap1.2.5indirect
npmwrap-ansi8.1.0indirect
npmwrap-ansi-cjs7.0.0indirect
npmyocto-queue0.1.0indirect
PyPIcopier—indirect
PyPIhatch-nodejs-version—indirect
PyPIhatchling—indirect
PyPIpytest—indirect
PyPIpytest-check-links—indirect
PyPIruff0.15.20indirect
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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, PyPI.