Public record
Software health reportschema 0.31.0 · metrics 2.10.0 · 2026-08-13 05:09 UTC

blackjax-devs / blackjax

BlackJAX is a Bayesian Inference library designed for ease of use, speed and modularity.

PythonApache-2.0★ 1,109 stars⑂ 146 forkssince Dec 2020View on GitHub ↗
KindLibraryhow this is determined
#probabilistic-programming#bayesian-inference#sampling-methods#hamiltonian-monte-carlo

blackjax-devs/blackjax holds a health index of 94 out of 100, placing it in the Exceptional band. It scores highest on Engineering Quality (96/100) and lowest on Security (60/100). It was last updated today. 2 contributors account for most of its recent work.

94
overall / 100
Exceptional

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.

94
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 81 is calibrated to 94 on the published index scale (record calibration 2026-08-02).

Ownership

BlackjaxOrganization
41 followers5 public repossince Dec 2020

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

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
PyPIblackjax1.6.2228,3013427 days agoprobabilitymachine-learningstatisticsmcmcsampling

Metrics by category

Vitality

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

86Excellent · 21% of overall

Development activity

82Excellent
How it's scored
36/36Push recency — last push 0 days ago
18/36Commit cadence — 26/52 weeks with commits
18/18Commit volume — 195 commits in the last year
10/10OpenSSF Scorecard: Maintained — 30 commit(s) and 9 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year195
human_commit_share1
days_since_last_push0
active_weeks_last_year26

Release discipline

92Excellent
How it's scored
27/27Ships releases — 34 releases published
36/36Release recency — latest release 27 days ago
19.8/27Release cadence — a release every ~82 days
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count34
latest_release_tag1.6.2
releases_from_tagsno
days_since_latest_release27
mean_days_between_releases82
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?

84Excellent · 17% of overall

Popularity & adoption

73Good
How it's scored
49.4/60Stars — 1,109 stars
18/25Forks — 146 forks
6/15Watchers — 13 watchers
Inputs used
forks146
stars1,109
watchers13
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

92Excellent
How it's scored
22.5/22.5README
22.5/22.5License — recognized license (Apache-2.0)
18/18CONTRIBUTING guide
13.5/13.5Code of conduct
0/7.2Issue template
6.3/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges3
has_contributingyes
has_issue_templateno
has_code_of_conductyes
readme_badge_servicescodecov.io, github.com, shields.io
has_pull_request_templateyes

Ecosystem adoption (downloads)

89Excellent
How it's scored
71.4/80Monthly downloads — 228,301 downloads/month across pypi
0/20Registry dependents — not reported by this ecosystem
Inputs used
packagesblackjax
dependents—
ecosystemspypi
total_downloads—
monthly_downloads228,301
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?

76Good · 23% of overall

Maintainer resilience (bus factor)

62Moderate
How it's scored
25.2/54Bus factor — 2 contributor(s) cover half of all commits
13.2/22.5Commit distribution — top contributor authored 42% of commits
13.5/13.5Contributor breadth — 64 contributors
10/10OpenSSF Scorecard: Contributors — project has 15 contributing companies or organizations
Inputs used
bus_factor2
contributors_sampled64
top_contributor_share0.415

Issue & PR responsiveness

76Good
How it's scored
37.6/42Issue resolution — 90% of issues closed
25.9/30PR acceptance — 463/537 decided PRs merged
13/13Newcomer PR acceptance — 1/1 first-time contributors' PRs merged in 30d
0/15OpenSSF Scorecard: Code-Review — Found 2/30 approved changesets -- score normalized to 0
Inputs used
merged_prs463
open_issues39
closed_issues336
prs_merged_7d2
prs_decided_7d2
prs_merged_30d24
prs_decided_30d24
issue_closed_ratio0.896
closed_unmerged_prs74
first_time_authors_30d1
first_time_prs_merged_30d1
first_time_prs_decided_30d1

Ownership & stewardship

73Good
How it's scored
30/30Ownership backing — organization-owned
0/20Verified domain — verified-domain status not read for this organization
11.7/25Owner reach — 41 followers of blackjax-devs
17/25Track record — 5 public repos, account ~5 yr old
Inputs used
followers41
owner_typeOrganization
is_verified—
owner_loginblackjax-devs
public_repos5
account_age_days2,072
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 pypi
35/35Publish recency — latest publish 27 days ago
20/20Version history — 34 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packagesblackjax
ecosystemspypi
any_deprecatedno
min_days_since_publish27

Engineering Quality

Are baseline engineering and documentation practices in place?

96Exceptional · 19% of overall

Engineering practices

94Exceptional
How it's scored
24/24CI workflows — 7 workflow(s)
24/24Tests present
16/16Linter config
9.6/9.6Pre-commit hooks
0/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests — 29 out of 29 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

100Exceptional
How it's scored
30/30README
25/25Documentation directory
15/15Documentation / homepage site — https://blackjax-devs.github.io/blackjax/
10/10Repository description
10/10Topics — 4 topics
10/10Wiki
Inputs used
topicsprobabilistic-programming, bayesian-inference, sampling-methods, hamiltonian-monte-carlo
has_wikiyes
homepagehttps://blackjax-devs.github.io/blackjax/
docs_sitehttps://blackjax-devs.github.io/blackjax/
has_readmeyes
has_docs_diryes
has_descriptionyes

Security

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

60Moderate · 16% of overall

Security posture

50Moderate
How it's scored
7.5/7.5Binary-Artifacts — no binaries found in the repo
0/7.5Branch-Protection — no data
2.5/2.5CI-Tests — 29 out of 29 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 2/30 approved changesets -- score normalized to 0
2.5/2.5Contributors — project has 15 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 9 issue activity found in the last 90 days -- score normalized to 10
5/5Packaging — packaging workflow detected
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
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
0/7.5Vulnerabilities — 16 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate5
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 advisories — no direct dependency carries a known advisory
25/25Indirect dependencies free of known advisories — no indirect dependency carries a known advisory
0/40No advisories left outstanding — no advisory carries a publication date
Inputs used
sourceosv
advisories0
affected_packages0
assessed_packages9
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 pypi:blackjax@1.6.2 runtime dependency closure — what installing the published package pulls in — 9 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.

72Good · 4% of overall

Agent context & guidance

40Weak
How it's scored
0/45Agent instructions — no CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
40/40Legible commit history — 100 of 100 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share1
agent_instruction_files—
agent_instruction_max_bytes—

Verify loop (build / test / typecheck)

82Excellent
How it's scored
18/18One-command bootstrap — Makefile
22/22Automated tests
11/11Lint / format config
11/11Static type checking — mypy.ini
10/10Reproducible environment — lockfile
10/10Demonstrated agent practice — 80 of the last 100 commits agent-authored or agent-credited
0/8Automated maintenance — no automated dependency updates observed
0/10OpenSSF Scorecard: Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0
Inputs used
has_nixno
has_testsyes
lockfilesuv.lock
has_dockerfileno
typed_languageno
bootstrap_filesMakefile
has_devcontainerno
has_linter_configyes
typecheck_configsmypy.ini
agent_commit_share0.8
toolchain_manifests—
dependency_bot_commit_share0

Code legibility for models

81Excellent
How it's scored
27/45Type-checkable code — Python with type-check config (mypy.ini)
53.9/55Manageable file sizes — 4/194 source files over 60KB
Inputs used
primary_languagePython
largest_source_bytes83,143
source_files_sampled194
oversized_source_files4

Machine-readable interfaces

100Exceptional
How it's scored
0/40API schema (OpenAPI/GraphQL/proto) — not applicable to this kind of software
0/20MCP server — not applicable to this kind of software
40/40Runnable examples — examples
Inputs used
example_dirsexamples
has_mcp_signalno
api_schema_files—
interfaces_expected_of—
Excluded from scoring (no data or not applicable): API schema (OpenAPI/GraphQL/proto), MCP server. Remaining weights renormalized.

Key facts

1,109GitHub stars
64contributors
195commits, last 12 months
0days since last push
34releases
2bus factor
39open issues
PyPIpackage ecosystems

Data collection warnings

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

More detail

Star and fork history 0 ★ / 146 ⇿
0Stars
146Forks
34Releases

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.

025507510012515013632021-012023-102026-08
Major 1Minor 9Patch 18

Each point covers 6 days.

OpenSSF Scorecard 5.0 / 10
5.0aggregate

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 · 2026-08-13 05:08 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-Tests29 out of 29 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 2/30 approved changesets -- score normalized to 0
10Contributorsproject has 15 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 9 issue activity found in the last 90 days -- score normalized to 10
10Packagingpackaging workflow detected
0Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
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
0Vulnerabilities16 existing vulnerabilities detected
Direct dependencies 6
RegistryPackageVersion constraintManifest
PyPIjax>=0.9.0pyproject.toml
PyPIjaxlib>=0.9.0pyproject.toml
PyPInumpy>=1.25pyproject.toml
PyPIoptax>=0.2.3pyproject.toml
PyPIscipy>=1.13pyproject.toml
PyPItyping-extensions>=4.4.0pyproject.toml
All dependencies 220

Full resolved dependency set from the GitHub dependency graph: 12 direct and 208 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
PyPIjax—direct
PyPIjax0.10.0direct
PyPIjaxlib—direct
PyPIjaxlib0.10.0direct
PyPInumpy—direct
PyPInumpy2.4.4direct
PyPIoptax—direct
PyPIoptax0.2.8direct
PyPIscipy—direct
PyPIscipy1.17.1direct
PyPItyping-extensions—direct
PyPItyping-extensions4.15.0direct
PyPIabsl-py2.4.0indirect
PyPIaccessible-pygments0.0.5indirect
PyPIaiofiles25.1.0indirect
PyPIalabaster1.0.0indirect
PyPIanyio4.13.0indirect
PyPIappnope0.1.4indirect
PyPIarviz—indirect
PyPIarviz0.23.4indirect
PyPIastroid4.1.2indirect
PyPIasttokens3.0.1indirect
PyPIattrs26.1.0indirect
PyPIbabel2.18.0indirect
PyPIbeautifulsoup44.14.3indirect
PyPIcachetools6.2.6indirect
PyPIcertifi2026.4.22indirect
PyPIcffi2.0.0indirect
PyPIcfgv3.5.0indirect
PyPIcharset-normalizer3.4.7indirect
PyPIchex—indirect
PyPIchex0.1.91indirect
PyPIclick8.3.3indirect
PyPIcloudpickle3.1.2indirect
PyPIcolorama0.4.6indirect
PyPIcomm0.2.3indirect
PyPIcons0.4.7indirect
PyPIcontourpy1.3.3indirect
PyPIcoverage7.13.5indirect
PyPIcycler0.12.1indirect
PyPIdebugpy1.8.20indirect
PyPIdecorator5.2.1indirect
PyPIdistlib0.4.0indirect
PyPIdm-tree0.1.10indirect
PyPIdocutils0.22.4indirect
PyPIetils1.14.0indirect
PyPIetuples0.3.10indirect
PyPIexecnet2.1.2indirect
PyPIexecuting2.2.1indirect
PyPIfastjsonschema2.21.2indirect
PyPIfastprogress—indirect
PyPIfilelock3.29.0indirect
PyPIflax—indirect
PyPIflax0.12.7indirect
PyPIfonttools4.62.1indirect
PyPIfsspec2026.4.0indirect
PyPIfunsor—indirect
PyPIfunsor0.4.7indirect
PyPIgast0.7.0indirect
PyPIgreenlet3.5.0indirect
PyPIgrpcio1.80.0indirect
PyPIgrpcio-tools1.80.0indirect
PyPIh110.16.0indirect
PyPIh5netcdf1.8.1indirect
PyPIh5py3.16.0indirect
PyPIhumanize4.15.0indirect
PyPIidentify2.6.19indirect
PyPIidna3.18indirect
PyPIimagesize2.0.0indirect
PyPIimportlib-metadata9.0.0indirect
PyPIiniconfig2.3.0indirect
PyPIipykernel7.2.0indirect
PyPIipython—indirect
PyPIipython9.13.0indirect
PyPIipython-pygments-lexers1.1.1indirect
PyPIjax-tap0.2.1indirect
PyPIjedi0.20.0indirect
PyPIjinja23.1.6indirect
PyPIjoblib1.5.3indirect
PyPIjsonschema4.26.0indirect
PyPIjsonschema-specifications2025.9.1indirect
PyPIjupyter-cache1.0.1indirect
PyPIjupyter-client8.8.0indirect
PyPIjupyter-core5.9.1indirect
PyPIjupytext—indirect
PyPIjupytext1.19.1indirect
PyPIkiwisolver1.5.0indirect
PyPIlatexcodec3.0.1indirect
PyPIllvmlite0.47.0indirect
PyPIlogical-unification0.4.7indirect
PyPImakefun1.16.0indirect
PyPImarkdown-it-py4.0.0indirect
PyPImarkupsafe3.0.3indirect
PyPImatplotlib3.10.9indirect
PyPImatplotlib-inline0.2.1indirect
PyPImdit-py-plugins0.5.0indirect
PyPImdurl0.1.2indirect
PyPIminikanren1.0.5indirect
PyPIml-dtypes0.5.4indirect
PyPImsgpack1.2.1indirect
PyPImultipledispatch1.0.0indirect
PyPImyst-nb—indirect
PyPImyst-nb1.4.0indirect
PyPImyst-parser5.0.0indirect
PyPInbclient0.10.4indirect
PyPInbformat5.10.4indirect
PyPInest-asyncio1.6.0indirect
PyPInodeenv1.10.0indirect
PyPInumba—indirect
PyPInumba0.65.1indirect
PyPInumpyro—indirect
PyPInumpyro0.21.0indirect
PyPIopt-einsum3.4.0indirect
PyPIorbax-checkpoint0.11.37indirect
PyPIoryx—indirect
PyPIoryx0.2.9indirect
PyPIpackaging26.2indirect
PyPIpandas3.0.2indirect
PyPIparso0.8.7indirect
PyPIpexpect4.9.0indirect
PyPIpillow12.2.0indirect
PyPIplatformdirs4.9.6indirect
PyPIpluggy1.6.0indirect
PyPIpre-commit—indirect
PyPIpre-commit4.6.0indirect
PyPIprompt-toolkit3.0.52indirect
PyPIprotobuf6.33.6indirect
PyPIpsutil7.2.2indirect
PyPIptyprocess0.7.0indirect
PyPIpure-eval0.2.3indirect
PyPIpy-cpuinfo9.0.0indirect
PyPIpybtex0.26.1indirect
PyPIpybtex-docutils1.0.3indirect
PyPIpycparser3.0indirect
PyPIpydata-sphinx-theme0.16.1indirect
PyPIpygments2.20.0indirect
PyPIpymc—indirect
PyPIpymc5.28.5indirect
PyPIpyparsing3.3.2indirect
PyPIpytensor—indirect
PyPIpytensor2.38.3indirect
PyPIpytest—indirect
PyPIpytest9.0.3indirect
PyPIpytest-benchmark—indirect
PyPIpytest-benchmark5.2.3indirect
PyPIpytest-cov—indirect
PyPIpytest-cov7.1.0indirect
PyPIpytest-xdist—indirect
PyPIpytest-xdist3.8.0indirect
PyPIpython-dateutil2.9.0.post0indirect
PyPIpython-discovery1.2.2indirect
PyPIpyyaml6.0.3indirect
PyPIpyzmq27.1.0indirect
PyPIreferencing0.37.0indirect
PyPIrequests2.33.1indirect
PyPIrich15.0.0indirect
PyPIroman-numerals4.1.0indirect
PyPIrpds-py0.30.0indirect
PyPIscikit-learn—indirect
PyPIscikit-learn1.8.0indirect
PyPIsetuptools—indirect
PyPIsetuptools82.0.1indirect
PyPIsetuptools-scm—indirect
PyPIsetuptools-scm10.0.5indirect
PyPIsimplejson4.1.1indirect
PyPIsix1.17.0indirect
PyPIsnowballstemmer3.0.1indirect
PyPIsoupsieve2.8.3indirect
PyPIsphinx—indirect
PyPIsphinx9.0.4indirect
PyPIsphinx9.1.0indirect
PyPIsphinx-autoapi—indirect
PyPIsphinx-autoapi3.8.0indirect
PyPIsphinx-autobuild—indirect
PyPIsphinx-autobuild2025.8.25indirect
PyPIsphinx-book-theme—indirect
PyPIsphinx-book-theme1.2.0indirect
PyPIsphinx-design—indirect
PyPIsphinx-design0.7.0indirect
PyPIsphinx-math-dollar—indirect
PyPIsphinx-math-dollar1.3indirect
PyPIsphinxcontrib-applehelp2.0.0indirect
PyPIsphinxcontrib-bibtex—indirect
PyPIsphinxcontrib-bibtex2.6.5indirect
PyPIsphinxcontrib-devhelp2.0.0indirect
PyPIsphinxcontrib-htmlhelp2.1.0indirect
PyPIsphinxcontrib-jsmath1.0.1indirect
PyPIsphinxcontrib-qthelp2.0.0indirect
PyPIsphinxcontrib-serializinghtml2.0.0indirect
PyPIsqlalchemy2.0.49indirect
PyPIstack-data0.6.3indirect
PyPIstarlette1.3.1indirect
PyPItabulate0.10.0indirect
PyPItensorflow-probability0.25.0indirect
PyPItensorstore0.1.82indirect
PyPItfp-nightly—indirect
PyPItfp-nightly0.26.0.dev20260504indirect
PyPIthreadpoolctl3.6.0indirect
PyPItomli2.4.1indirect
PyPItoolz1.1.0indirect
PyPItornado6.5.7indirect
PyPItqdm4.67.3indirect
PyPItraitlets5.14.3indirect
PyPItreescope0.1.10indirect
PyPItzdata2026.2indirect
PyPIurllib32.7.0indirect
PyPIuvicorn0.46.0indirect
PyPIuvloop0.22.1indirect
PyPIvcs-versioning1.1.1indirect
PyPIversioneer—indirect
PyPIversioneer0.29indirect
PyPIvirtualenv21.3.0indirect
PyPIwatchfiles1.1.1indirect
PyPIwcwidth0.7.0indirect
PyPIwebsockets16.0indirect
PyPIwrapt2.1.2indirect
PyPIxarray2026.4.0indirect
PyPIxarray-einstats0.10.0indirect
PyPIxarray-einstats0.9.1indirect
PyPIzipp3.23.1indirect
Dependency advisories 0

Installing pypi:blackjax@1.6.2 pulls in 9 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

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