Public record
Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-08-27 22:08 UTC

google-deepmind / mujoco

Multi-Joint dynamics with Contact. A general purpose physics simulator.

C++ · Jupyter Notebook · PythonApache-2.0★ 14,709 stars⑂ 1,702 forkssince Aug 2021View on GitHub ↗
KindLibraryCommand-line toolhow this is determined

google-deepmind/mujoco holds a health index of 97 out of 100, placing it in the Exceptional band. It scores highest on Vitality (96/100) and lowest on Security (66/100). It was last updated today. 4 contributors account for most of its recent work.

97
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.

97
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 85 is calibrated to 97 on the published index scale (record calibration 2026-08-02).

Ownership

Google DeepMindOrganization
26,376 followers402 public repossince Aug 2014

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

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publishTags
npmmujoco3.1.1613,4052162 days agomujocophysicswasmgoogledeepmindwebassemblysimulationroboticsemscriptenjavascripttypescript
PyPImujoco-mjx3.12.0244,320357 days ago
PyPImujoco3.12.03,657,215527 days ago

Metrics by category

Vitality

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

96Exceptional · 21% of overall

Development activity

100Exceptional
How it's scored
36/36Push recencylast push 0 days ago
36/36Commit cadence52/52 weeks with commits
18/18Commit volume2,017 commits in the last year
10/10OpenSSF Scorecard: Maintained30 commit(s) and 11 issue activity found in the last 90 days -- score normalized to 10
Inputs used
commits_last_year2,017
human_commit_share1
days_since_last_push0
active_weeks_last_year52
How it's scored
27/27Ships releases52 releases published
36/36Release recencylatest release 7 days ago
27/27Release cadencea release every ~28.6 days
0/10OpenSSF Scorecard: Signed-ReleasesProject has not signed or included provenance with any releases.
Inputs used
releases_count52
latest_release_tag3.12.0
releases_from_tagsno
days_since_latest_release7
mean_days_between_releases28.6

Community & Adoption

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

88Excellent · 17% of overall
How it's scored
60/60Stars14,709 stars
25/25Forks1,702 forks
11.7/15Watchers130 watchers
Inputs used
forks1,702
stars14,709
watchers130
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history
How it's scored
22.5/22.5README
22.5/22.5Licenserecognized license (Apache-2.0)
18/18CONTRIBUTING guide
0/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeyes
has_licenseyes
readme_badges3
has_contributingyes
has_issue_templateno
has_code_of_conductno
readme_badge_servicesreadthedocs.org, shields.io
has_pull_request_templateno
How it's scored
80/80Monthly downloads3,914,940 downloads/month across npm, pypi
0/20Registry dependentsnot reported by this ecosystem
Inputs used
packagesmujoco, mujoco-mjx, mujoco
dependents
ecosystemsnpm, pypi
total_downloads
monthly_downloads3,914,940
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?

82Excellent · 23% of overall
How it's scored
43.2/54Bus factor4 contributor(s) cover half of all commits
16.8/22.5Commit distributiontop contributor authored 25% of commits
13.5/13.5Contributor breadth99 contributors
10/10OpenSSF Scorecard: Contributorsproject has 22 contributing companies or organizations
Inputs used
bus_factor4
contributors_sampled99
top_contributor_share0.254
How it's scored
38.4/42Issue resolution92% of issues closed
13.5/30PR acceptance239/530 decided PRs merged
0/13Newcomer PR acceptance0/11 first-time contributors' PRs merged in 30d
15/15OpenSSF Scorecard: Code-Reviewall changesets reviewed
Inputs used
merged_prs239
open_issues161
closed_issues1,738
prs_merged_7d5
prs_decided_7d17
prs_merged_30d8
prs_decided_30d60
issue_closed_ratio0.915
closed_unmerged_prs291
first_time_authors_30d9
first_time_prs_merged_30d0
first_time_prs_decided_30d11
How it's scored
30/30Ownership backingorganization-owned
0/20Verified domain
25/25Owner reach26,376 followers of google-deepmind
25/25Track record402 public repos, account ~12 yr old
Inputs used
followers26,376
owner_typeOrganization
is_verifiedno
owner_logingoogle-deepmind
public_repos402
account_age_days4,380

Package maintenance

100Exceptional
How it's scored
25/25Published & resolvable3 package(s) on npm, pypi
35/35Publish recencylatest publish 7 days ago
20/20Version history52 published versions
20/20Not deprecatedactive, not deprecated or yanked
Inputs used
packagesmujoco, mujoco-mjx, mujoco
ecosystemsnpm, pypi
any_deprecatedno
min_days_since_publish7

Engineering Quality

Are baseline engineering and documentation practices in place?

92Excellent · 19% of overall
How it's scored
24/24CI workflows5 workflow(s)
24/24Tests present
16/16Linter configmjx/pyproject.toml ([tool.isort]), python/pyproject.toml ([tool.isort])
9.6/9.6Pre-commit hooks
0/6.4.editorconfig
20/20OpenSSF Scorecard: CI-Tests4 out of 4 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

90Excellent
How it's scored
30/30README
25/25Documentation directory
15/15Documentation / homepage sitehttps://mujoco.org
10/10Repository description
10/10Topics3 topics
0/10Wiki
Inputs used
topicsrobotics, physics, mujoco
has_wikino
homepagehttps://mujoco.org
docs_sitehttps://mujoco.org
has_readmeyes
has_docs_diryes
has_descriptionyes

Security

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

66Good · 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-Tests4 out of 4 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
7.5/7.5Code-Reviewall changesets reviewed
2.5/2.5Contributorsproject has 22 contributing companies or organizations
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 11 issue activity found in the last 90 days -- score normalized to 10
0/5Packagingno data
1.5/5Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 3
0/5SASTSAST tool is not run on all commits -- score normalized to 0
5/5Security-Policysecurity policy file detected
0/7.5Signed-ReleasesProject has not signed or included provenance with any releases.
0/7.5Token-Permissionsdetected GitHub workflow tokens with excessive permissions
0/7.5Vulnerabilities10 existing vulnerabilities detected
Inputs used
sourceopenssf_scorecard
checks_evaluated16
scorecard_versionv5.5.0
checks_inconclusive2
scorecard_aggregate5.8
Excluded from scoring (no data or not applicable): Branch-Protection, Packaging. 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
advisories13
affected_packages6
assessed_packages173
unassessed_packages8
affected_by_severityhigh 4, 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 173 resolved dependencies against OSV. 8 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.

72Good · 4% of overall
How it's scored
0/45Agent instructionsno CLAUDE.md / AGENTS.md / editor rules
0/15Machine-readable docs (llms.txt)
40/40Legible commit history93 of 100 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtno
llms_txt_url
legible_history_share0.93
agent_instruction_files
agent_instruction_max_bytes
How it's scored
18/18One-command bootstrapdoc/Makefile
22/22Automated tests
11/11Lint / format configmjx/pyproject.toml ([tool.isort]), python/pyproject.toml ([tool.isort])
11/11Static type checkingpython/mujoco/sysid/py.typed, wasm/tsconfig.json
10/10Reproducible environmentlockfile
0/10Demonstrated agent practiceno agent-authored commits among the last 100
0/8Automated maintenanceno automated dependency updates observed
3/10OpenSSF Scorecard: Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 3
Inputs used
has_nixno
has_testsyes
lockfilespackage-lock.json
has_dockerfileno
typed_languageyes
bootstrap_filesdoc/Makefile
has_devcontainerno
has_linter_configyes
typecheck_configspython/mujoco/sysid/py.typed, wasm/tsconfig.json
agent_commit_share0
toolchain_manifests
dependency_bot_commit_share0
How it's scored
45/45Type-checkable codeC++ (statically typed)
51.7/55Manageable file sizes55/917 source files over 60KB
Inputs used
primary_languageC++
largest_source_bytes446,181
source_files_sampled917
oversized_source_files55
How it's scored
0/40API schema (OpenAPI/GraphQL/proto)not applicable to this kind of software
0/20MCP servernot applicable to this kind of software
40/40Runnable examplesnotebooks, sample
Inputs used
example_dirsnotebooks, sample
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

14,709GitHub stars
99contributors
2,017commits, last 12 months
0days since last push
52releases
4bus factor
161open issues
npm, PyPIpackage ecosystems

Data collection warnings

  • Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
  • First-time contributor figures cover 12 of 39 authors (cap 12)
  • Could not fetch npm package 'org.mujoco' from its registry

More detail

Star and fork history 0 ★ / 1,702 ⇿
0Stars
1,702Forks
26Releases

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.

5007501,0001,2501,5001,7501,702162024-062025-072026-08
Major 0Minor 11Patch 15

Each point covers 3 days.

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 · 2026-08-27 22:08 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-Tests4 out of 4 merged PRs checked by a CI test -- score normalized to 10
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
10Code-Reviewall changesets reviewed
10Contributorsproject has 22 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 11 issue activity found in the last 90 days -- score normalized to 10
n/aPackagingpackaging workflow not detected
3Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 3
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
0Vulnerabilities10 existing vulnerabilities detected
Direct dependencies 12
RegistryPackageVersion constraintManifest
PyPIabsl-pymjx/pyproject.toml
PyPIetilsmjx/pyproject.toml
PyPIjaxmjx/pyproject.toml
PyPIjaxlibmjx/pyproject.toml
PyPImujoco>=3.12.1.dev0mjx/pyproject.toml
PyPIscipymjx/pyproject.toml
PyPItrimeshmjx/pyproject.toml
PyPIabsl-pypython/pyproject.toml
PyPIetilspython/pyproject.toml
PyPIglfwpython/pyproject.toml
PyPInumpypython/pyproject.toml
PyPIpyopenglpython/pyproject.toml
All dependencies 181

Full resolved dependency set from the GitHub dependency graph: 13 direct and 168 indirect (transitive) packages. The transitive closure is complete when the repository commits a lockfile.

RegistryPackageVersionRelation
PyPIabsl-py2.1.0direct
PyPIetils1.10.0direct
PyPIglfwdirect
PyPIglfw2.10.2direct
PyPImujocodirect
PyPInumpydirect
PyPInumpy2.4.4direct
PyPInumpy2.5.2direct
PyPIpyopengldirect
PyPIpyopengl3.1.7direct
PyPIscipy1.17.0direct
PyPIscipy1.18.1direct
PyPItrimesh4.5.2direct
npm@cspotcode/source-map-support0.8.1indirect
npm@emnapi/core1.10.0indirect
npm@emnapi/runtime1.10.0indirect
npm@emnapi/wasi-threads1.2.1indirect
npm@isaacs/cliui8.0.2indirect
npm@jridgewell/resolve-uri3.1.2indirect
npm@jridgewell/sourcemap-codec1.5.5indirect
npm@jridgewell/trace-mapping0.3.9indirect
npm@napi-rs/wasm-runtime1.1.4indirect
npm@oxc-project/types0.133.0indirect
npm@pkgjs/parseargs0.11.0indirect
npm@rolldown/binding-android-arm641.0.3indirect
npm@rolldown/binding-darwin-arm641.0.3indirect
npm@rolldown/binding-darwin-x641.0.3indirect
npm@rolldown/binding-freebsd-x641.0.3indirect
npm@rolldown/binding-linux-arm-gnueabihf1.0.3indirect
npm@rolldown/binding-linux-arm64-gnu1.0.3indirect
npm@rolldown/binding-linux-arm64-musl1.0.3indirect
npm@rolldown/binding-linux-ppc64-gnu1.0.3indirect
npm@rolldown/binding-linux-s390x-gnu1.0.3indirect
npm@rolldown/binding-linux-x64-gnu1.0.3indirect
npm@rolldown/binding-linux-x64-musl1.0.3indirect
npm@rolldown/binding-openharmony-arm641.0.3indirect
npm@rolldown/binding-wasm32-wasi1.0.3indirect
npm@rolldown/binding-win32-arm64-msvc1.0.3indirect
npm@rolldown/binding-win32-x64-msvc1.0.3indirect
npm@rolldown/pluginutils1.0.1indirect
npm@tsconfig/node101.0.11indirect
npm@tsconfig/node121.0.11indirect
npm@tsconfig/node141.0.3indirect
npm@tsconfig/node161.0.4indirect
npm@tybys/wasm-util0.10.2indirect
npm@types/jasmine5.1.12indirect
npm@types/node24.9.2indirect
npmacorn8.15.0indirect
npmacorn-walk8.3.4indirect
npmansi-regex5.0.1indirect
npmansi-regex6.2.2indirect
npmansi-styles4.3.0indirect
npmansi-styles6.2.3indirect
npmarg4.1.3indirect
npmbalanced-match1.0.2indirect
npmbrace-expansion2.1.1indirect
npmcolor-convert2.0.1indirect
npmcolor-name1.1.4indirect
npmcreate-require1.1.1indirect
npmcross-spawn7.0.6indirect
npmdetect-libc2.1.2indirect
npmdiff4.0.4indirect
npmeastasianwidth0.2.0indirect
npmemoji-regex8.0.0indirect
npmemoji-regex9.2.2indirect
npmfdir6.5.0indirect
npmforeground-child3.3.1indirect
npmfsevents2.3.3indirect
npmglob10.5.0indirect
npmis-fullwidth-code-point3.0.0indirect
npmisexe2.0.0indirect
npmjackspeak3.4.3indirect
npmjasmine5.12.0indirect
npmjasmine-core5.12.1indirect
npmlightningcss1.32.0indirect
npmlightningcss-android-arm641.32.0indirect
npmlightningcss-darwin-arm641.32.0indirect
npmlightningcss-darwin-x641.32.0indirect
npmlightningcss-freebsd-x641.32.0indirect
npmlightningcss-linux-arm-gnueabihf1.32.0indirect
npmlightningcss-linux-arm64-gnu1.32.0indirect
npmlightningcss-linux-arm64-musl1.32.0indirect
npmlightningcss-linux-x64-gnu1.32.0indirect
npmlightningcss-linux-x64-musl1.32.0indirect
npmlightningcss-win32-arm64-msvc1.32.0indirect
npmlightningcss-win32-x64-msvc1.32.0indirect
npmlru-cache10.4.3indirect
npmmake-error1.3.6indirect
npmminimatch9.0.9indirect
npmminipass7.1.2indirect
npmnanoid3.3.12indirect
npmpackage-json-from-dist1.0.1indirect
npmpath-key3.1.1indirect
npmpath-scurry1.11.1indirect
npmpicocolors1.1.1indirect
npmpicomatch4.0.4indirect
npmpostcss8.5.15indirect
npmrolldown1.0.3indirect
npmshebang-command2.0.0indirect
npmshebang-regex3.0.0indirect
npmsignal-exit4.1.0indirect
npmsource-map-js1.2.1indirect
npmstring-width4.2.3indirect
npmstring-width5.1.2indirect
npmstrip-ansi6.0.1indirect
npmstrip-ansi7.1.2indirect
npmthree0.178.0indirect
npmtinyglobby0.2.17indirect
npmts-node10.9.2indirect
npmtslib2.8.1indirect
npmtypescript5.8.2indirect
npmundici-types7.16.0indirect
npmv8-compile-cache-lib3.0.1indirect
npmvite8.0.16indirect
npmwhich2.0.2indirect
npmwrap-ansi7.0.0indirect
npmwrap-ansi8.1.0indirect
npmyn3.1.1indirect
PyPIattrs24.2.0indirect
PyPIauditwheel5.4.0indirect
PyPIbuild1.2.2.post1indirect
PyPIcolorama0.4.6indirect
PyPIcontourpy1.3.3indirect
PyPIcycler0.12.1indirect
PyPIexecnet2.1.1indirect
PyPIfonttools4.61.1indirect
PyPIfsspec2024.10.0indirect
PyPIfuro2024.8.6indirect
PyPIimageio2.37.2indirect
PyPIimageio-ffmpeg0.6.0indirect
PyPIimportlib-resources6.4.5indirect
PyPIiniconfig2.0.0indirect
PyPIjax-cuda12-pjrt0.8.3indirect
PyPIjax-cuda12-plugin0.8.3indirect
PyPIjinja23.1.6indirect
PyPIjq1.8.0indirect
PyPIkiwisolver1.4.9indirect
PyPIlsprotocolindirect
PyPImarkupsafe2.0.1indirect
PyPImarkupsafe3.0.3indirect
PyPImatplotlib3.10.8indirect
PyPImjviserindirect
PyPIml-dtypes0.5.4indirect
PyPInarwhals2.16.0indirect
PyPInbsphinx0.9.1indirect
PyPIopt-einsum3.4.0indirect
PyPIpackaging24.2indirect
PyPIpandoc1.1.0indirect
PyPIpillow12.3.0indirect
PyPIpip26.1indirect
PyPIpip26.1.2indirect
PyPIplotly6.5.2indirect
PyPIpluggy1.5.0indirect
PyPIpsutil7.2.2indirect
PyPIpyelftools0.31indirect
PyPIpyglsindirect
PyPIpygments2.20.0indirect
PyPIpyparsing3.3.2indirect
PyPIpyproject-hooks1.2.0indirect
PyPIpytest9.0.3indirect
PyPIpytest-xdist3.6.1indirect
PyPIpython-dateutil2.9.0.post0indirect
PyPIpyyaml6.0.3indirect
PyPIsetuptools78.1.1indirect
PyPIsix1.17.0indirect
PyPIsphinx7.4.7indirect
PyPIsphinx-copybutton0.5.2indirect
PyPIsphinx-design0.6.1indirect
PyPIsphinx-favicon1.0.1indirect
PyPIsphinx-reredirects0.1.1indirect
PyPIsphinx-toolbox3.8.2indirect
PyPIsphinxcontrib-bibtex2.6.3indirect
PyPIsphinxcontrib-katex0.9.4indirect
PyPIsphinxcontrib-youtube1.2.0indirect
PyPItabulate0.9.0indirect
PyPItomli2.1.0indirect
PyPItyping-extensions4.16.0indirect
PyPIwarp-langindirect
PyPIwarp-lang1.16.0indirect
PyPIwheel0.46.2indirect
PyPIzipp3.21.0indirect
Dependency advisories 6

This repository publishes no package the index resolves, so its own dependency graph was assessed — 173 packages, which also include development and test pins that never ship: 6 carry known advisories, of which 0 are direct. 8 could not be assessed — no resolved version, an unsupported ecosystem, or beyond the reported package list.

PackageVersionRelationSeverityAdvisoriesFixed in
brace-expansion2.1.1indirecthigh35.0.9
nanoid3.3.12indirecthigh25.1.16
pip26.1indirecthigh326.2
postcss8.5.15indirecthigh28.5.23
pip26.1.2indirectmoderate126.2
setuptools78.1.1indirectmoderate283.0.0

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 statisticsnpm, PyPI.