# libretro/mame — health index 56/100 (Moderate)

> Inspection of the public repository libretro/mame by inspect.software. It holds a health index of 56 out of 100, placing it in the Moderate band. The index is a signal derived from publicly visible practice, not a warranty, a security audit, or an endorsement, and it is independent of payment.

- Repository: https://github.com/libretro/mame
- Report page: https://inspect.software/software/libretro/mame
- Full JSON report: https://inspect.software/api/repositories/libretro/mame/report
- Badge: https://raw.githubusercontent.com/inspect-software/badges/main/v1/l/libretro/mame.svg
- Inspected: 2026-07-31
- Methodology: metrics 2.5.0, report schema 0.27.0 (https://inspect.software/methodology.md)

## Category summary

| Category | Weight | Index | Band |
|---|---|---|---|
| Vitality | 21% | 75/100 | Good |
| Community & Adoption | 17% | 38/100 | Weak |
| Sustainability & Governance | 23% | 84/100 | Excellent |
| Engineering Quality | 19% | 28/100 | At Risk |
| Security | 16% | 30/100 | At Risk |
| AI Readiness | 4% | 60/100 | Moderate |

The weighted overall 54 is calibrated to 56 on the published index scale (record calibration 2026-08-02).

## Repository facts

| Field | Value |
|---|---|
| Description | MAME - Multiple Arcade Machine Emulator |
| Primary language | C++ |
| Stars | 91 |
| Forks | 82 |
| Created | 2016-11-12 |
| Last push | 2026-07-28 |
| Latest release | v0.3.1 |
| Commits (last year) | 3,914 |
| Bus factor | 9 |
| Fork | yes |

## Published packages

| Registry | Package | Latest | Monthly downloads |
|---|---|---|---|
| npm | rapidjson | 0.0.1-security | 21 |

## Vitality — 75/100 (Good)

Is the project alive — is code being written and are releases shipping? Weight: 21% of the overall index.

### Development activity — 98/100 (Exceptional)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Push recency | met | 36 / 36 | last push 2 days ago |
| Commit cadence | partial | 33.9 / 36 | 49/52 weeks with commits |
| Commit volume | met | 18 / 18 | 3914 commits in the last year |
| OpenSSF Scorecard: Maintained | met | 10 / 10 | 30 commit(s) and 5 issue activity found in the last 90 days -- score normalized to 10 |

### Release discipline — 40/100 (Weak)

Excluded from scoring (no data or not applicable): OpenSSF Scorecard: Signed-Releases. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Ships releases | partial | 16.2 / 27 | 2 version tags (no GitHub releases) |
| Release recency | not met | 0 / 36 | latest release 3919 days ago |
| Release cadence | partial | 19.8 / 27 | a release every ~45.3 days |
| OpenSSF Scorecard: Signed-Releases | excluded | 0 / 10 | no releases found |

### Abandonment — 100/100 (Exceptional)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Project is still maintained | met | 100 / 100 | last human commit 6 days ago |

## Community & Adoption — 38/100 (Weak)

Does the project have users, downloads, attention, and a welcoming setup for contributors? Weight: 17% of the overall index.

### Popularity & adoption — 54/100 (Moderate)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Stars | partial | 31.7 / 60 | 91 stars |
| Forks | partial | 15.9 / 25 | 82 forks |
| Watchers | partial | 6.7 / 15 | 17 watchers |

### Community health — 19/100 (Critical)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| README | not met | 0 / 22.5 | — |
| License | partial | 16.9 / 22.5 | license file present, not a recognized license |
| CONTRIBUTING guide | not met | 0 / 18 | — |
| Code of conduct | not met | 0 / 13.5 | — |
| Issue template | not met | 0 / 7.2 | — |
| PR template | not met | 0 / 6.3 | — |

## Sustainability & Governance — 84/100 (Excellent)

Will the project survive its people — bus factor, responsiveness, who backs it, and package upkeep? Weight: 23% of the overall index.

### Maintainer resilience (bus factor) — 98/100 (Exceptional)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Bus factor | met | 54 / 54 | 9 contributor(s) cover half of all commits |
| Commit distribution | partial | 20.3 / 22.5 | top contributor authored 10% of commits |
| Contributor breadth | met | 13.5 / 13.5 | 100 contributors |
| OpenSSF Scorecard: Contributors | met | 10 / 10 | project has 3 contributing companies or organizations -- score normalized to 10 |

### Issue & PR responsiveness — 72/100 (Good)

Excluded from scoring (no data or not applicable): Newcomer PR acceptance. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Issue resolution | partial | 36 / 42 | 86% of issues closed |
| PR acceptance | partial | 26.9 / 30 | 229/255 decided PRs merged |
| Newcomer PR acceptance | excluded | 0 / 13 | no first-time contributor's PR decided in 30d |
| OpenSSF Scorecard: Code-Review | not met | 0 / 15 | Found 2/28 approved changesets -- score normalized to 0 |

### Ownership & stewardship — 78/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Ownership backing | met | 30 / 30 | organization-owned |
| Verified domain | not met | 0 / 20 | — |
| Owner reach | partial | 23.3 / 25 | 1,728 followers of libretro |
| Track record | met | 25 / 25 | 282 public repos, account ~14 yr old |

## Engineering Quality — 28/100 (At Risk)

Are baseline engineering and documentation practices in place? Weight: 19% of the overall index.

### Engineering practices — 30/100 (At Risk)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| CI workflows | not met | 0 / 24 | — |
| Tests present | met | 24 / 24 | — |
| Linter config | not met | 0 / 16 | — |
| Pre-commit hooks | not met | 0 / 9.6 | — |
| .editorconfig | met | 6.4 / 6.4 | — |
| OpenSSF Scorecard: CI-Tests | not met | 0 / 20 | 0 out of 4 merged PRs checked by a CI test -- score normalized to 0 |

### Documentation — 25/100 (At Risk)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| README | not met | 0 / 30 | — |
| Documentation directory | met | 25 / 25 | — |
| Documentation / homepage site | not met | 0 / 15 | — |
| Repository description | not met | 0 / 10 | — |
| Topics | not met | 0 / 10 | — |
| Wiki | not met | 0 / 10 | — |

## Security — 30/100 (At Risk)

Are visible security and supply-chain practices strong, with no malicious dependency and no unresolved high-risk jurisdiction exposure? Weight: 16% of the overall index.

### Security posture — 30/100 (At Risk)

Excluded from scoring (no data or not applicable): Dangerous-Workflow, Packaging, Signed-Releases, Token-Permissions. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Binary-Artifacts | not met | 0 / 7.5 | binaries present in source code |
| Branch-Protection | not met | 0 / 7.5 | branch protection not enabled on development/release branches |
| CI-Tests | not met | 0 / 2.5 | 0 out of 4 merged PRs checked by a CI test -- score normalized to 0 |
| CII-Best-Practices | not met | 0 / 2.5 | no effort to earn an OpenSSF best practices badge detected |
| Code-Review | not met | 0 / 7.5 | Found 2/28 approved changesets -- score normalized to 0 |
| Contributors | met | 2.5 / 2.5 | project has 3 contributing companies or organizations -- score normalized to 10 |
| Dangerous-Workflow | excluded | 0 / 10 | no workflows found |
| Dependency-Update-Tool | not met | 0 / 7.5 | no update tool detected |
| Fuzzing | met | 5 / 5 | project is fuzzed |
| License | partial | 2.2 / 2.5 | license file detected |
| Maintained | met | 7.5 / 7.5 | 30 commit(s) and 5 issue activity found in the last 90 days -- score normalized to 10 |
| Packaging | excluded | 0 / 5 | packaging workflow not detected |
| Pinned-Dependencies | partial | 3.5 / 5 | dependency not pinned by hash detected -- score normalized to 7 |
| SAST | not met | 0 / 5 | SAST tool is not run on all commits -- score normalized to 0 |
| Security-Policy | not met | 0 / 5 | security policy file not detected |
| Signed-Releases | excluded | 0 / 7.5 | no releases found |
| Token-Permissions | excluded | 0 / 7.5 | No tokens found |
| Vulnerabilities | partial | 1.5 / 7.5 | 8 existing vulnerabilities detected |

### High-Risk Jurisdiction Exposure — 100/100 (Exceptional)

Only high-confidence self-published location evidence affects this multiplier. Ambiguous matches are review-only; country evidence is not proof of nationality, citizenship, legal registration, malicious intent, or sanctions status.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Policy exposure multiplier | met | 100 / 100 | no confirmed policy-scope location match |

## AI Readiness — 60/100 (Moderate)

How well is the repo equipped to be developed and maintained with AI coding agents? Carries a deliberately small weight: agent tooling is a real maintenance signal, but its absence must never gate the top of the scale (calibration saturates at raw 91, so 100/100 remains reachable with AI Readiness at zero).

### Agent context & guidance — 22/100 (At Risk)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Agent instructions | not met | 0 / 45 | no CLAUDE.md / AGENTS.md / editor rules |
| Machine-readable docs (llms.txt) | not met | 0 / 15 | — |
| Legible commit history | partial | 21.9 / 40 | 41 of 100 human commits state their intent (structured subject or explanatory body) |

### Verify loop (build / test / typecheck) — 68/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| One-command bootstrap | met | 18 / 18 | 3rdparty/bgfx/3rdparty/fcpp/makefile, 3rdparty/bgfx/3rdparty/glsl-optimizer/src/glsl/Makefile, 3rdparty/bgfx/examples/01-cubes/makefile, 3rdparty/bgfx/examples/02-metaballs/makefile, 3rdparty/bgfx/examples/03-raymarch/makefile, 3rdparty/bgfx/examples/04-mesh/makefile, 3rdparty/bgfx/examples/05-instancing/makefile, 3rdparty/bgfx/examples/06-bump/makefile, 3rdparty/bgfx/examples/07-callback/makefile, 3rdparty/bgfx/examples/08-update/makefile, 3rdparty/bgfx/examples/09-hdr/makefile, 3rdparty/bgfx/examples/12-lod/makefile, 3rdparty/bgfx/examples/13-stencil/makefile, 3rdparty/bgfx/examples/14-shadowvolumes/makefile, 3rdparty/bgfx/examples/15-shadowmaps-simple/makefile, 3rdparty/bgfx/examples/16-shadowmaps/makefile, 3rdparty/bgfx/examples/17-drawstress/makefile, 3rdparty/bgfx/examples/18-ibl/makefile, 3rdparty/bgfx/examples/19-oit/makefile, 3rdparty/bgfx/examples/21-deferred/makefile, 3rdparty/bgfx/examples/23-vectordisplay/makefile, 3rdparty/bgfx/examples/24-nbody/makefile, 3rdparty/bgfx/examples/27-terrain/makefile, 3rdparty/bgfx/examples/28-wireframe/makefile, 3rdparty/bgfx/examples/30-picking/makefile, 3rdparty/bgfx/examples/31-rsm/makefile, 3rdparty/bgfx/examples/33-pom/makefile, 3rdparty/bgfx/examples/36-sky/makefile, 3rdparty/bgfx/examples/37-gpudrivenrendering/makefile, 3rdparty/bgfx/examples/38-bloom/makefile, 3rdparty/bgfx/examples/39-assao/makefile, 3rdparty/bgfx/examples/40-svt/makefile, 3rdparty/bgfx/examples/41-tess/makefile, 3rdparty/bgfx/examples/42-bunnylod/makefile, 3rdparty/bgfx/examples/43-denoise/makefile, 3rdparty/bgfx/examples/44-sss/makefile, 3rdparty/bgfx/examples/45-bokeh/makefile, 3rdparty/bgfx/examples/46-fsr/makefile, 3rdparty/bgfx/examples/47-pixelformats/makefile, 3rdparty/bgfx/examples/48-drawindirect/makefile, 3rdparty/bgfx/examples/49-hextile/makefile, 3rdparty/bgfx/examples/common/debugdraw/makefile, 3rdparty/bgfx/examples/common/font/makefile, 3rdparty/bgfx/examples/common/imgui/makefile, 3rdparty/bgfx/examples/common/nanovg/makefile, 3rdparty/bgfx/examples/common/ps/makefile, 3rdparty/bgfx/examples/makefile, 3rdparty/bgfx/makefile, 3rdparty/bgfx/src/makefile, 3rdparty/bgfx/tools/geometryv/makefile, 3rdparty/bgfx/tools/texturev/makefile, 3rdparty/bimg/makefile, 3rdparty/bx/makefile, 3rdparty/genie/build/gmake.darwin/Makefile, 3rdparty/genie/build/gmake.freebsd/Makefile, 3rdparty/genie/build/gmake.linux/Makefile, 3rdparty/genie/build/gmake.windows/Makefile, 3rdparty/genie/makefile, 3rdparty/genie/src/host/lua-5.3.0/Makefile, 3rdparty/genie/src/host/lua-5.3.0/src/Makefile, 3rdparty/linenoise/Makefile, 3rdparty/lsqlite3/Makefile, 3rdparty/lsqlite3/extras/Makefile, 3rdparty/lua-zlib/Makefile, 3rdparty/lua/Makefile, 3rdparty/lua/src/Makefile, 3rdparty/luafilesystem/Makefile, 3rdparty/lzma/C/Util/7z/makefile, 3rdparty/lzma/C/Util/Lzma/makefile, 3rdparty/lzma/C/Util/LzmaLib/makefile, 3rdparty/lzma/C/Util/SfxSetup/makefile, 3rdparty/lzma/CPP/7zip/Bundles/Alone7z/makefile, 3rdparty/lzma/CPP/7zip/Bundles/Format7zExtractR/makefile, 3rdparty/lzma/CPP/7zip/Bundles/Format7zR/makefile, 3rdparty/lzma/CPP/7zip/Bundles/LzmaCon/makefile, 3rdparty/lzma/CPP/7zip/Bundles/SFXCon/makefile, 3rdparty/lzma/CPP/7zip/Bundles/SFXSetup/makefile, 3rdparty/lzma/CPP/7zip/Bundles/SFXWin/makefile, 3rdparty/lzma/CPP/7zip/UI/Client7z/makefile, 3rdparty/lzma/CPP/7zip/UI/Console/makefile, 3rdparty/rapidjson/doc/diagram/makefile, 3rdparty/softfloat3/build/Linux-386-GCC/Makefile, 3rdparty/softfloat3/build/Linux-386-SSE2-GCC/Makefile, 3rdparty/softfloat3/build/Linux-ARM-VFPv2-GCC/Makefile, 3rdparty/softfloat3/build/Linux-x86_64-GCC/Makefile, 3rdparty/softfloat3/build/Win32-MinGW/Makefile, 3rdparty/softfloat3/build/Win32-SSE2-MinGW/Makefile, 3rdparty/softfloat3/build/Win64-MinGW-w64/Makefile, 3rdparty/softfloat3/build/template-FAST_INT64/Makefile, 3rdparty/softfloat3/build/template-not-FAST_INT64/Makefile, 3rdparty/utf8proc/Makefile, 3rdparty/utf8proc/bench/Makefile, 3rdparty/utf8proc/data/Makefile, 3rdparty/zlib/Makefile, 3rdparty/zlib/contrib/blast/Makefile, 3rdparty/zlib/contrib/minizip/Makefile, 3rdparty/zlib/contrib/puff/Makefile, 3rdparty/zlib/contrib/untgz/Makefile, 3rdparty/zlib/nintendods/Makefile, 3rdparty/zstd/Makefile, 3rdparty/zstd/contrib/diagnose_corruption/Makefile, 3rdparty/zstd/contrib/externalSequenceProducer/Makefile, 3rdparty/zstd/contrib/gen_html/Makefile, 3rdparty/zstd/contrib/largeNbDicts/Makefile, 3rdparty/zstd/contrib/linux-kernel/Makefile, 3rdparty/zstd/contrib/linux-kernel/test/Makefile, 3rdparty/zstd/contrib/pzstd/Makefile, 3rdparty/zstd/contrib/recovery/Makefile, 3rdparty/zstd/contrib/seekable_format/examples/Makefile, 3rdparty/zstd/contrib/seekable_format/tests/Makefile, 3rdparty/zstd/contrib/seqBench/Makefile, 3rdparty/zstd/examples/Makefile, 3rdparty/zstd/lib/Makefile, 3rdparty/zstd/lib/dll/example/Makefile, 3rdparty/zstd/programs/Makefile, 3rdparty/zstd/tests/Makefile, 3rdparty/zstd/tests/fuzz/Makefile, 3rdparty/zstd/tests/fuzz/seq_prod_fuzz_example/Makefile, 3rdparty/zstd/tests/gzip/Makefile, 3rdparty/zstd/tests/regression/Makefile, 3rdparty/zstd/zlibWrapper/Makefile, docs/Makefile, makefile, src/lib/netlist/build/makefile, src/osd/modules/render/bgfx/shaders/makefile |
| Automated tests | met | 22 / 22 | — |
| Lint / format config | not met | 0 / 11 | — |
| Static type checking | met | 11 / 11 | C++ (statically typed) |
| Reproducible environment | met | 10 / 10 | Dockerfile |
| Demonstrated agent practice | not met | 0 / 10 | no agent-authored commits among the last 100 |
| Automated maintenance | not met | 0 / 8 | no automated dependency updates observed |
| OpenSSF Scorecard: Pinned-Dependencies | partial | 7 / 10 | dependency not pinned by hash detected -- score normalized to 7 |

### Code legibility for models — 98/100 (Exceptional)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Type-checkable code | met | 45 / 45 | C++ (statically typed) |
| Manageable file sizes | partial | 52.6 / 55 | 903/20682 source files over 60KB |

### Machine-readable interfaces — 80/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| API schema (OpenAPI/GraphQL/proto) | met | 40 / 40 | 3rdparty/expat/fuzz/xml_lpm_fuzzer.proto |
| MCP server | not met | 0 / 20 | — |
| Runnable examples | met | 40 / 40 | example, examples, samples |

## Collection warnings

- Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token
- Community profile unavailable
- npm package 'rapidjson' points at a different repository (npm/security-holder); excluded from ecosystem scoring
- GitHub dependency-graph SBOM unavailable (404); the dependency graph may be disabled for this repository

## What this report is

inspect.software measures public repositories against a single published, versioned methodology and reports the result as a 1–100 health index. Findings are signals derived from what is visible in public repository data — they are not a security audit, a warranty, or an endorsement, and no result depends on payment.

- Methodology, formulas and weights: https://inspect.software/methodology.md
- What a result does and does not claim: https://inspect.software/wiki/signals-not-warranties.md
- Rating bands: https://inspect.software/wiki/scoring-bands.md
- Corrections: https://inspect.software/contact.md
- Index of all documents: https://inspect.software/llms.txt