Public record
Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-10-02 05:00 UTC

PolicyEngine / policyengine-core

Core microsimulation engine for PolicyEngine models. Forked from OpenFisca-Core.

PythonAGPL-3.0★ 22 stars⑂ 30 forkssince Oct 2022View on GitHub ↗
KindCommand-line toolLibraryhow this is determined

PolicyEngine/policyengine-core holds a health index of 84 out of 100, placing it in the Excellent band. It scores highest on Engineering Quality (86/100) and lowest on Security (55/100). It was last updated today. 3 contributors account for most of its recent work.

84
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.

84
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 71 is calibrated to 84 on the published index scale (record calibration 2026-08-02).

Ownership

PolicyEngineOrganization
195 followers340 public repossince Aug 2021

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

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publish
PyPIpolicyengine-core3.32.1257,2822240 days ago

Metrics by category

Vitality

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

67Good · 21% of overall
How it's scored
36/36Push recency — last push 0 days ago
18.7/36Commit cadence — 27/52 weeks with commits
18/18Commit volume — 193 commits in the last year
10/10OpenSSF Scorecard: Maintained — 30 commit(s) and 14 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year193
human_commit_share0.67
days_since_last_push0
active_weeks_last_year27
How it's scored
27/27Ships releases — 1 releases published
0/36Release recency — latest release 1,460 days ago
12.6/27Release cadence — cadence unknown (single release)
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count1
latest_release_tag0.1.0
releases_from_tagsno
days_since_latest_release1,460
mean_days_between_releases—
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?

64Moderate · 17% of overall
How it's scored
21.4/60Stars — 22 stars
12.2/25Forks — 30 forks
2.7/15Watchers — 4 watchers
Inputs used
forks30
stars22
watchers4
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

85Excellent
How it's scored
22.5/22.5README
22.5/22.5License — recognized license (AGPL-3.0)
18/18CONTRIBUTING guide
0/13.5Code of conduct
7.2/7.2Issue template
6.3/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges3
has_contributingyes
has_issue_templateyes
has_code_of_conductno
readme_badge_servicesbadge.fury.io, codecov.io, shields.io
has_pull_request_templateyes
How it's scored
63.4/80Monthly downloads — 57,282 downloads/month across pypi
0/20Registry dependents — not reported by this ecosystem
Inputs used
packagespolicyengine-core
dependents—
ecosystemspypi
total_downloads—
monthly_downloads57,282
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?

75Good · 23% of overall
How it's scored
36/54Bus factor — 3 contributor(s) cover half of all commits
15.8/22.5Commit distribution — top contributor authored 30% of commits
13.5/13.5Contributor breadth — 56 contributors
10/10OpenSSF Scorecard: Contributors — project has 35 contributing companies or organizations
Inputs used
bus_factor3
contributors_sampled56
top_contributor_share0.299
How it's scored
27.4/42Issue resolution — 65% of issues closed
26.1/30PR acceptance — 248/285 decided PRs merged
0/13Newcomer PR acceptance — no first-time contributor's PR decided in 30d
0/15OpenSSF Scorecard: Code-Review — Found 1/20 approved changesets -- score normalized to 0
Inputs used
merged_prs248
open_issues93
closed_issues175
prs_merged_7d6
prs_decided_7d6
prs_merged_30d13
prs_decided_30d13
issue_closed_ratio0.653
closed_unmerged_prs37
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
30/30Ownership backing — organization-owned
0/20Verified domain
16.5/25Owner reach — 195 followers of PolicyEngine
23.3/25Track record — 340 public repos, account ~5 yr old
Inputs used
followers195
owner_typeOrganization
is_verifiedno
owner_loginPolicyEngine
public_repos340
account_age_days1,882

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable — 1 package(s) on pypi
35/35Publish recency — latest publish 0 days ago
20/20Version history — 224 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packagespolicyengine-core
ecosystemspypi
any_deprecatedno
min_days_since_publish0

Engineering Quality

Are baseline engineering and documentation practices in place?

86Excellent · 19% of overall
How it's scored
24/24CI workflows — 2 workflow(s)
24/24Tests present
16/16Linter config — pyproject.toml ([tool.ruff])
0/9.6Pre-commit hooks
0/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests — 10 out of 10 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

90Excellent
How it's scored
30/30README
25/25Documentation directory
15/15Documentation / homepage site — https://policyengine.github.io/policyengine-core
10/10Repository description
10/10Topics — 4 topics
0/10Wiki
Inputs used
topicsbenefit, framework, microsimulation, tax
has_wikino
homepagehttps://policyengine.github.io/policyengine-core
docs_sitehttps://policyengine.github.io/policyengine-core
has_readmeyes
has_docs_diryes
has_descriptionyes

Security

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

55Moderate · 16% of overall
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 — 10 out of 10 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 1/20 approved changesets -- score normalized to 0
2.5/2.5Contributors — project has 35 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 14 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 — 27 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.
How it's scored
19.6/35Direct dependencies free of known advisories — 1 affected: requests 2.32.5 (moderate 5.5)
0/25Indirect dependencies free of known advisories — transitive set not separable from development and test dependencies in this scope
35.2/40No advisories left outstanding — 1 advisory-carrying package(s) unaddressed past 90 days; oldest published 190 days ago
Inputs used
sourceosv
advisories49
affected_packages9
assessed_packages149
unassessed_packages0
affected_by_severitycritical 1, high 4, moderate 3, low 1
direct_affected_packages1
Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories. Remaining weights renormalized. Matched 149 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.

86Excellent · 4% of overall
How it's scored
45/45Agent instructions — AGENTS.md, CLAUDE.md
0/15Machine-readable docs (llms.txt)
40/40Legible commit history — 52 of 67 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url—
legible_history_share0.776
agent_instruction_filesAGENTS.md, CLAUDE.md
agent_instruction_max_bytes1,227
How it's scored
18/18One-command bootstrap — Makefile
22/22Automated tests
11/11Lint / format config — pyproject.toml ([tool.ruff])
11/11Static type checking — mypy.ini
10/10Reproducible environment — lockfile
10/10Demonstrated agent practice — 31 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_share0.31
toolchain_manifests—
dependency_bot_commit_share0
How it's scored
27/45Type-checkable code — Python with type-check config (mypy.ini)
54.8/55Manageable file sizes — 1/272 source files over 60KB
Inputs used
primary_languagePython
largest_source_bytes85,859
source_files_sampled272
oversized_source_files1
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 — notebooks
Inputs used
example_dirsnotebooks
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

22GitHub stars
56contributors
193commits, last 12 months
0days since last push
1releases
3bus factor
93open issues
PyPIpackage ecosystems

Data collection warnings

  • Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
  • deps.dev does not index pypi:policyengine-core@3.32.12; advisories assessed against the repository dependency graph instead

More detail

Star and fork history 0 ★ / 30 ⇿
0Stars
30Forks

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.

0510152025303022022-112024-102026-09

Each point covers 4 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 · 2026-10-02 05:00 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-Tests10 out of 10 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 1/20 approved changesets -- score normalized to 0
10Contributorsproject has 35 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 14 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
0Vulnerabilities27 existing vulnerabilities detected
Direct dependencies 16
RegistryPackageVersion constraintManifest
PyPIdpath<3pyproject.toml
PyPIh5py>=3,<4pyproject.toml
PyPIhuggingface_hub>=0.25.1pyproject.toml
PyPIipython>=8,<9pyproject.toml
PyPImicrodf_python>=1.0.0pyproject.toml
PyPInumexpr<3pyproject.toml
PyPInumpy>=2.1.0,<3pyproject.toml
PyPIpandas>=1pyproject.toml
PyPIplotly>=5,<6pyproject.toml
PyPIpsutil>=6,<7pyproject.toml
PyPIpytest>=8,<10pyproject.toml
PyPIpyvis>=0.3.2pyproject.toml
PyPIrequests>=2,<3pyproject.toml
PyPIsortedcontainers<3pyproject.toml
PyPIstandard-imghdr—pyproject.toml
PyPIwheel<1pyproject.toml
All dependencies 149

Full resolved dependency set from the GitHub dependency graph: 16 direct and 133 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
PyPIdpath2.2.0direct
PyPIh5py3.15.1direct
PyPIhuggingface-hub1.4.1direct
PyPIipython8.38.0direct
PyPImicrodf-python1.2.1direct
PyPInumexpr2.14.1direct
PyPInumpy2.4.2direct
PyPIpandas3.0.1direct
PyPIplotly5.24.1direct
PyPIpsutil6.1.1direct
PyPIpytest9.1.1direct
PyPIpyvis0.3.2direct
PyPIrequests2.32.5direct
PyPIsortedcontainers2.4.0direct
PyPIstandard-imghdr3.13.0direct
PyPIwheel0.46.3direct
PyPIaccessible-pygments0.0.5indirect
PyPIalabaster0.7.16indirect
PyPIannotated-doc0.0.4indirect
PyPIanyio4.12.1indirect
PyPIappnope0.1.4indirect
PyPIasttokens3.0.1indirect
PyPIattrs25.4.0indirect
PyPIbabel2.18.0indirect
PyPIbeautifulsoup44.14.3indirect
PyPIbuild1.4.0indirect
PyPIcertifi2026.1.4indirect
PyPIcffi2.0.0indirect
PyPIcharset-normalizer3.4.4indirect
PyPIclick8.3.1indirect
PyPIcolorama0.4.6indirect
PyPIcomm0.2.3indirect
PyPIcoverage7.13.4indirect
PyPIdebugpy1.8.20indirect
PyPIdecorator5.2.1indirect
PyPIdocutils0.18.1indirect
PyPIexecuting2.2.1indirect
PyPIfastjsonschema2.21.2indirect
PyPIfilelock3.24.3indirect
PyPIfsspec2026.2.0indirect
PyPIfuro2023.3.27indirect
PyPIgreenlet3.3.2indirect
PyPIh110.16.0indirect
PyPIhf-xet1.2.0indirect
PyPIhttpcore1.0.9indirect
PyPIhttpx0.28.1indirect
PyPIhypothesis6.168.3indirect
PyPIidna3.11indirect
PyPIimagesize2.0.0indirect
PyPIimportlib-metadata8.7.1indirect
PyPIiniconfig2.3.0indirect
PyPIipykernel7.2.0indirect
PyPIjedi0.19.2indirect
PyPIjinja23.1.6indirect
PyPIjsonpickle4.1.1indirect
PyPIjsonschema4.26.0indirect
PyPIjsonschema-specifications2025.9.1indirect
PyPIjupyter-book0.15.1indirect
PyPIjupyter-cache0.6.1indirect
PyPIjupyter-client8.8.0indirect
PyPIjupyter-core5.9.1indirect
PyPIlatexcodec3.0.1indirect
PyPIlinkify-it-py2.0.3indirect
PyPImarkdown-it-py2.2.0indirect
PyPImarkupsafe2.0.1indirect
PyPImatplotlib-inline0.2.1indirect
PyPImdit-py-plugins0.3.5indirect
PyPImdurl0.1.2indirect
PyPImypy0.991indirect
PyPImypy-extensions1.1.0indirect
PyPImyst-nb0.17.2indirect
PyPImyst-parser0.18.1indirect
PyPInbclient0.7.4indirect
PyPInbformat5.10.4indirect
PyPInest-asyncio1.6.0indirect
PyPInetworkx3.6.1indirect
PyPIpackaging26.0indirect
PyPIparso0.8.6indirect
PyPIpexpect4.9.0indirect
PyPIplatformdirs4.9.4indirect
PyPIpluggy1.6.0indirect
PyPIpolicyengine-core3.32.11indirect
PyPIpolicyengine-uk2.90.2indirect
PyPIpolicyengine-us1.824.1indirect
PyPIprompt-toolkit3.0.52indirect
PyPIptyprocess0.7.0indirect
PyPIpure-eval0.2.3indirect
PyPIpybtex0.25.1indirect
PyPIpybtex-docutils1.0.3indirect
PyPIpycparser3.0indirect
PyPIpydata-sphinx-theme0.15.4indirect
PyPIpygments2.19.2indirect
PyPIpyproject-hooks1.2.0indirect
PyPIpytest-cov7.0.0indirect
PyPIpytest-rerunfailures14.0indirect
PyPIpython-dateutil2.9.0.post0indirect
PyPIpyyaml6.0.3indirect
PyPIpyzmq27.1.0indirect
PyPIreferencing0.37.0indirect
PyPIrich14.3.3indirect
PyPIrpds-py0.30.0indirect
PyPIruff0.15.5indirect
PyPIsetuptools82.0.0indirect
PyPIshellingham1.5.4indirect
PyPIsix1.17.0indirect
PyPIsnowballstemmer3.0.1indirect
PyPIsoupsieve2.8.3indirect
PyPIsphinx5.0.0indirect
PyPIsphinx-argparse0.4.0indirect
PyPIsphinx-basic-ng1.0.0b2indirect
PyPIsphinx-book-theme1.0.1indirect
PyPIsphinx-comments0.0.3indirect
PyPIsphinx-copybutton0.5.2indirect
PyPIsphinx-design0.3.0indirect
PyPIsphinx-external-toc0.3.1indirect
PyPIsphinx-jupyterbook-latex0.5.2indirect
PyPIsphinx-math-dollar1.2.1indirect
PyPIsphinx-multitoc-numbering0.1.3indirect
PyPIsphinx-thebe0.2.1indirect
PyPIsphinx-togglebutton0.4.4indirect
PyPIsphinxcontrib-applehelp2.0.0indirect
PyPIsphinxcontrib-bibtex2.5.0indirect
PyPIsphinxcontrib-devhelp2.0.0indirect
PyPIsphinxcontrib-htmlhelp2.1.0indirect
PyPIsphinxcontrib-jsmath1.0.1indirect
PyPIsphinxcontrib-qthelp2.0.0indirect
PyPIsphinxcontrib-serializinghtml2.0.0indirect
PyPIspm-calculator0.3.1indirect
PyPIsqlalchemy2.0.48indirect
PyPIstack-data0.6.3indirect
PyPItabulate0.10.0indirect
PyPItenacity9.1.4indirect
PyPItomli2.4.0indirect
PyPItornado6.5.4indirect
PyPItowncrier25.8.0indirect
PyPItqdm4.67.3indirect
PyPItraitlets5.14.3indirect
PyPItyper0.24.1indirect
PyPItyper-slim0.24.0indirect
PyPItypes-pyyaml6.0.12.2indirect
PyPItypes-requests2.28.11.7indirect
PyPItypes-setuptools65.6.0.2indirect
PyPItypes-urllib31.26.25.4indirect
PyPItyping-extensions4.15.0indirect
PyPItzdata2025.3indirect
PyPIuc-micro-py2.0.0indirect
PyPIurllib32.6.3indirect
PyPIwcwidth0.6.0indirect
PyPIzipp3.23.0indirect
Dependency advisories 9

This repository publishes no package the index resolves, so its own dependency graph was assessed — 149 packages, which also include development and test pins that never ship: 9 carry known advisories, of which 1 are direct.

PackageVersionRelationSeverityAdvisoriesFixed in
anyio4.12.1indirectcritical44.14.2
click8.3.1indirecthigh18.3.3
soupsieve2.8.3indirecthigh82.9.0
tornado6.5.4indirecthigh186.5.9
urllib32.6.3indirecthigh102.8.0
requests2.32.5directmoderate22.33.0
idna3.11indirectmoderate23.15
setuptools82.0.0indirectmoderate283.0.0
pygments2.19.2indirectlow22.20.0

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 statistics — PyPI.