Public record
Software health reportschema 0.34.0 · metrics 2.10.0 · 2026-09-10 02:06 UTC

nektro / bun

Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one

Zig · C++Custom license★ 0 stars⑂ 0 forkssince Nov 2023forkView on GitHub ↗
KindLibraryNetwork serviceWeb interfacehow this is determined

nektro/bun holds a health index of 30 out of 100, placing it in the At Risk band. It scores highest on AI Readiness (87/100) and lowest on Community & Adoption (9/100). It was last updated 226 days ago. A single contributor accounts for most of its recent work.

30
overall / 100
At Risk

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.

30
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 36 is calibrated to 30 on the published index scale (record calibration 2026-08-02).

Ownership

Meghan DennyPersonal account
652 followers258 public repossince Sep 2013@astheno

This repository is owned by a personal account. A single-owner project carries more continuity risk than an organization-backed one.

Package ecosystems

RegistryPackageVersionDownloads / moVersionsLast publish
npmbench0.3.618,38083985 days ago

Metrics by category

Vitality

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

21At Risk · 21% of overall

Development activity

35Weak
How it's scored
3.6/36Push recency — last push 226 days ago
13.8/36Commit cadence — 20/52 weeks with commits
18/18Commit volume — 977 commits in the last year
0/10OpenSSF Scorecard: Maintained — 0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
Inputs used
commits_last_year977
human_commit_share0.99
days_since_last_push226
active_weeks_last_year20

Release discipline

1Critical
How it's scored
0/27Ships releases — no releases published
0/36Release recency — no releases
0/27Release cadence — no releases
0/10OpenSSF Scorecard: Signed-Releases — no data
Inputs used
releases_count0
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?

9Critical · 17% of overall

Popularity & adoption

1Critical
How it's scored
0/60Stars — 0 stars
0/25Forks — 0 forks
0/15Watchers — 0 watchers
Inputs used
forks0
stars0
watchers0
growth_stateunverified
growth_factor_pct100
growth_unverified_reasonno_history

Community health

19Critical
How it's scored
0/22.5README
16.9/22.5License — license file present, not a recognized license
0/18CONTRIBUTING guide
0/13.5Code of conduct
0/7.2Issue template
0/6.3PR template
Inputs used
has_readmeno
has_licenseno
readme_badges3
has_contributingno
has_issue_templateno
has_code_of_conductno
readme_badge_servicesshields.io
has_pull_request_templateno

Sustainability & Governance

Will the project survive its people — bus factor, responsiveness, who backs it, and package upkeep?

44Weak · 23% of overall

Maintainer resilience (bus factor)

41Weak
How it's scored
9/54Bus factor — 1 contributor(s) cover half of all commits
8.8/22.5Commit distribution — top contributor authored 61% of commits
13.5/13.5Contributor breadth — 99 contributors
10/10OpenSSF Scorecard: Contributors — project has 70 contributing companies or organizations
Inputs used
bus_factor1
contributors_sampled99
top_contributor_share0.61

Issue & PR responsiveness

1Critical
How it's scored
0/42Issue resolution — no issues or no data
0/30PR acceptance — 0/241 decided PRs merged
0/13Newcomer PR acceptance — no first-time contributor's PR decided in 30d
0/15OpenSSF Scorecard: Code-Review — Found 0/30 approved changesets -- score normalized to 0
Inputs used
merged_prs0
open_issues0
closed_issues0
prs_merged_7d0
prs_decided_7d0
prs_merged_30d0
prs_decided_30d0
issue_closed_ratio—
closed_unmerged_prs241
first_time_authors_30d0
first_time_prs_merged_30d0
first_time_prs_decided_30d0
Excluded from scoring (no data or not applicable): Issue resolution, Newcomer PR acceptance. Remaining weights renormalized.

Ownership & stewardship

69Good
How it's scored
10/30Ownership backing — personal (user) account
0/20Verified domain — not applicable to user accounts
20.2/25Owner reach — 652 followers of nektro
25/25Track record — 258 public repos, account ~12 yr old
Inputs used
followers652
owner_typeUser
is_verified—
owner_loginnektro
public_repos258
account_age_days4,742
Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

Package maintenance

69Good
How it's scored
25/25Published & resolvable — 1 package(s) on npm
4/35Publish recency — latest publish 3,985 days ago
20/20Version history — 8 published versions
20/20Not deprecated — active, not deprecated or yanked
Inputs used
packagesbench
ecosystemsnpm
any_deprecatedno
min_days_since_publish3,985

Engineering Quality

Are baseline engineering and documentation practices in place?

69Good · 19% of overall

Engineering practices

88Excellent
How it's scored
24/24CI workflows — 22 workflow(s)
24/24Tests present
16/16Linter config — .eslintrc.cjs, .eslintrc.js, .eslintrc.json, eslint.config.mjs, rustfmt.toml
0/9.6Pre-commit hooks
6.4/6.4.editorconfig
0/20OpenSSF Scorecard: CI-Tests — no data
Inputs used
has_ciyes
has_testsyes
has_editorconfigyes
has_linter_configyes
has_precommit_configno
Excluded from scoring (no data or not applicable): OpenSSF Scorecard: CI-Tests. Remaining weights renormalized.

Documentation

40Weak
How it's scored
0/30README
25/25Documentation directory
15/15Documentation / homepage site — https://bun.sh
0/10Repository description
0/10Topics
0/10Wiki
Inputs used
topics—
has_wikino
homepagehttps://bun.sh
docs_sitehttps://bun.sh
has_readmeno
has_docs_diryes
has_descriptionno

Security

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

24At Risk · 16% of overall

Security posture

24At Risk
How it's scored
0/7.5Binary-Artifacts — binaries present in source code
0/7.5Branch-Protection — branch protection not enabled on development/release branches
0/2.5CI-Tests — no data
0/2.5CII-Best-Practices — no effort to earn an OpenSSF best practices badge detected
0/7.5Code-Review — Found 0/30 approved changesets -- score normalized to 0
2.5/2.5Contributors — project has 70 contributing companies or organizations
10/10Dangerous-Workflow — no dangerous workflow patterns detected
0/7.5Dependency-Update-Tool — no update tool detected
0/5Fuzzing — project is not fuzzed
2.2/2.5License — license file detected
0/7.5Maintained — 0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
0/5Packaging — no data
0/5Pinned-Dependencies — dependency not pinned by hash detected -- score normalized to 0
0/5SAST — no SAST tool detected
5/5Security-Policy — security policy file detected
0/7.5Signed-Releases — no data
0/7.5Token-Permissions — detected GitHub workflow tokens with excessive permissions
0/7.5Vulnerabilities — no data
Inputs used
sourceopenssf_scorecard
checks_evaluated14
scorecard_versionv5.5.0
checks_inconclusive4
scorecard_aggregate2.4
Excluded from scoring (no data or not applicable): CI-Tests, Packaging, Signed-Releases, Vulnerabilities. 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.

87Excellent · 4% of overall

Agent context & guidance

100Exceptional
How it's scored
45/45Agent instructions — .github/workflows/CLAUDE.md, AGENTS.md, CLAUDE.md, src/AGENTS.md, src/CLAUDE.md, src/bun.js/bindings/v8/AGENTS.md, src/bun.js/bindings/v8/CLAUDE.md, src/js/AGENTS.md, src/js/CLAUDE.md, src/unicode/uucode/CLAUDE.md, test/AGENTS.md, test/CLAUDE.md, test/js/node/test/parallel/CLAUDE.md
15/15Machine-readable docs (llms.txt) — llms.txt served by the project website (https://bun.sh/llms.txt)
40/40Legible commit history — 90 of 99 human commits state their intent (structured subject or explanatory body)
Inputs used
has_llms_txtyes
llms_txt_urlhttps://bun.sh/llms.txt
legible_history_share0.909
agent_instruction_files.github/workflows/CLAUDE.md, AGENTS.md, CLAUDE.md, src/AGENTS.md, src/CLAUDE.md, src/bun.js/bindings/v8/AGENTS.md, src/bun.js/bindings/v8/CLAUDE.md, src/js/AGENTS.md, src/js/CLAUDE.md, src/unicode/uucode/CLAUDE.md, test/AGENTS.md, test/CLAUDE.md, test/js/node/test/parallel/CLAUDE.md
agent_instruction_max_bytes10,273

Verify loop (build / test / typecheck)

82Excellent
How it's scored
18/18One-command bootstrap — test/js/node/test/fixtures/keys/Makefile
22/22Automated tests
11/11Lint / format config — .eslintrc.cjs, .eslintrc.js, .eslintrc.json, eslint.config.mjs, rustfmt.toml
11/11Static type checking — bench/bundle/tsconfig.json, bench/expect-to-equal/tsconfig.json, bench/express/tsconfig.json, bench/postgres/tsconfig.json, bench/tsconfig.json, bench/websocket-server/tsconfig.json, packages/bun-debug-adapter-protocol/tsconfig.json, packages/bun-error/tsconfig.json, packages/bun-inspector-frontend/tsconfig.json, packages/bun-inspector-protocol/tsconfig.json, packages/bun-lambda/tsconfig.json, packages/bun-plugin-svelte/tsconfig.json, packages/bun-plugin-yaml/tsconfig.json, packages/bun-release/tsconfig.json, packages/bun-types/tsconfig.json, packages/bun-vscode/example/tsconfig.json, packages/bun-vscode/tsconfig.json, packages/bun-wasm/tsconfig.json, src/bake/tsconfig.json, src/codegen/bindgenv2/tsconfig.json, src/create/projects/react-shadcn-spa/tsconfig.json, src/init/react-app/tsconfig.json, src/init/react-shadcn/tsconfig.json, src/init/react-tailwind/tsconfig.json, src/js/tsconfig.json, src/node-fallbacks/tsconfig.json, src/tsconfig.json, test/bundler/transpiler/jsx-dev/tsconfig.json, test/bundler/transpiler/tsconfig.json, test/integration/expo-app/tsconfig.json, test/integration/next-pages/tsconfig.json, test/integration/typegraphql/tsconfig.json, test/integration/vite-build/the-test-app/tsconfig.json, test/js/node/test/tsconfig.json, test/js/third_party/es-module-lexer/tsconfig.json, test/js/third_party/next-auth/fixture/tsconfig.json, test/js/third_party/pnpm/install_fixture/tsconfig.json, test/snippets/custom-emotion-jsx/tsconfig.json, test/tsconfig.json, tsconfig.json
10/10Reproducible environment — Dockerfile, Nix, lockfile
10/10Demonstrated agent practice — 63 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_nixyes
has_testsyes
lockfilesCargo.lock, bun.lockb, package-lock.json, pnpm-lock.yaml, yarn.lock
has_dockerfileyes
typed_languageno
bootstrap_filestest/js/node/test/fixtures/keys/Makefile
has_devcontainerno
has_linter_configyes
typecheck_configsbench/bundle/tsconfig.json, bench/expect-to-equal/tsconfig.json, bench/express/tsconfig.json, bench/postgres/tsconfig.json, bench/tsconfig.json, bench/websocket-server/tsconfig.json, packages/bun-debug-adapter-protocol/tsconfig.json, packages/bun-error/tsconfig.json, packages/bun-inspector-frontend/tsconfig.json, packages/bun-inspector-protocol/tsconfig.json, packages/bun-lambda/tsconfig.json, packages/bun-plugin-svelte/tsconfig.json, packages/bun-plugin-yaml/tsconfig.json, packages/bun-release/tsconfig.json, packages/bun-types/tsconfig.json, packages/bun-vscode/example/tsconfig.json, packages/bun-vscode/tsconfig.json, packages/bun-wasm/tsconfig.json, src/bake/tsconfig.json, src/codegen/bindgenv2/tsconfig.json, src/create/projects/react-shadcn-spa/tsconfig.json, src/init/react-app/tsconfig.json, src/init/react-shadcn/tsconfig.json, src/init/react-tailwind/tsconfig.json, src/js/tsconfig.json, src/node-fallbacks/tsconfig.json, src/tsconfig.json, test/bundler/transpiler/jsx-dev/tsconfig.json, test/bundler/transpiler/tsconfig.json, test/integration/expo-app/tsconfig.json, test/integration/next-pages/tsconfig.json, test/integration/typegraphql/tsconfig.json, test/integration/vite-build/the-test-app/tsconfig.json, test/js/node/test/tsconfig.json, test/js/third_party/es-module-lexer/tsconfig.json, test/js/third_party/next-auth/fixture/tsconfig.json, test/js/third_party/pnpm/install_fixture/tsconfig.json, test/snippets/custom-emotion-jsx/tsconfig.json, test/tsconfig.json, tsconfig.json
agent_commit_share0.63
toolchain_manifestsbench/ffi/src/Cargo.toml, packages/bun-build-mdx-rs/Cargo.toml, packages/bun-native-plugin-rs/Cargo.toml, packages/bun-native-plugin-rs/bun-macro/Cargo.toml, test/js/third_party/grpc-js/fixtures/tonic-server/Cargo.toml
dependency_bot_commit_share0

Code legibility for models

81Excellent
How it's scored
27/45Type-checkable code — Zig with type-check config (bench/bundle/tsconfig.json, bench/expect-to-equal/tsconfig.json, bench/express/tsconfig.json, bench/postgres/tsconfig.json, bench/tsconfig.json, bench/websocket-server/tsconfig.json, packages/bun-debug-adapter-protocol/tsconfig.json, packages/bun-error/tsconfig.json, packages/bun-inspector-frontend/tsconfig.json, packages/bun-inspector-protocol/tsconfig.json, packages/bun-lambda/tsconfig.json, packages/bun-plugin-svelte/tsconfig.json, packages/bun-plugin-yaml/tsconfig.json, packages/bun-release/tsconfig.json, packages/bun-types/tsconfig.json, packages/bun-vscode/example/tsconfig.json, packages/bun-vscode/tsconfig.json, packages/bun-wasm/tsconfig.json, src/bake/tsconfig.json, src/codegen/bindgenv2/tsconfig.json, src/create/projects/react-shadcn-spa/tsconfig.json, src/init/react-app/tsconfig.json, src/init/react-shadcn/tsconfig.json, src/init/react-tailwind/tsconfig.json, src/js/tsconfig.json, src/node-fallbacks/tsconfig.json, src/tsconfig.json, test/bundler/transpiler/jsx-dev/tsconfig.json, test/bundler/transpiler/tsconfig.json, test/integration/expo-app/tsconfig.json, test/integration/next-pages/tsconfig.json, test/integration/typegraphql/tsconfig.json, test/integration/vite-build/the-test-app/tsconfig.json, test/js/node/test/tsconfig.json, test/js/third_party/es-module-lexer/tsconfig.json, test/js/third_party/next-auth/fixture/tsconfig.json, test/js/third_party/pnpm/install_fixture/tsconfig.json, test/snippets/custom-emotion-jsx/tsconfig.json, test/tsconfig.json, tsconfig.json)
54.3/55Manageable file sizes — 95/7,861 source files over 60KB
Inputs used
primary_languageZig
largest_source_bytes9,389,827
source_files_sampled7,861
oversized_source_files95

Machine-readable interfaces

80Excellent
How it's scored
40/40API schema (OpenAPI/GraphQL/proto) — bench/grpc-server/benchmark.proto, test/js/third_party/grpc-js/fixtures/channelz.proto, test/js/third_party/grpc-js/fixtures/echo_service.proto, test/js/third_party/grpc-js/fixtures/math.proto, test/js/third_party/grpc-js/fixtures/test_service.proto, test/js/third_party/grpc-js/fixtures/tonic-server/proto/helloworld.proto
0/20MCP server
40/40Runnable examples — example
Inputs used
example_dirsexample
has_mcp_signalno
api_schema_filesbench/grpc-server/benchmark.proto, test/js/third_party/grpc-js/fixtures/channelz.proto, test/js/third_party/grpc-js/fixtures/echo_service.proto, test/js/third_party/grpc-js/fixtures/math.proto, test/js/third_party/grpc-js/fixtures/test_service.proto, test/js/third_party/grpc-js/fixtures/tonic-server/proto/helloworld.proto
interfaces_expected_ofnetwork-service

Key facts

0GitHub stars
99contributors
977commits, last 12 months
226days since last push
0releases
1bus factor
0open issues
npmpackage ecosystems

Data collection warnings

  • Community profile unavailable
  • Could not fetch npm package 'misctools' from its registry
  • GitHub dependency-graph SBOM unavailable (404); the dependency graph may be disabled for this repository

More detail

OpenSSF Scorecard 2.4 / 10
2.4aggregate

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 · 2026-09-10 02:06 UTC

0Binary-Artifactsbinaries present in source code
0Branch-Protectionbranch protection not enabled on development/release branches
n/aCI-Testsno pull request found
0CII-Best-Practicesno effort to earn an OpenSSF best practices badge detected
0Code-ReviewFound 0/30 approved changesets -- score normalized to 0
10Contributorsproject has 70 contributing companies or organizations
10Dangerous-Workflowno dangerous workflow patterns detected
0Dependency-Update-Toolno update tool detected
0Fuzzingproject is not fuzzed
9Licenselicense file detected
0Maintained0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0
n/aPackagingpackaging workflow not detected
0Pinned-Dependenciesdependency not pinned by hash detected -- score normalized to 0
0SASTno SAST tool detected
10Security-Policysecurity policy file detected
n/aSigned-Releasesno releases found
0Token-Permissionsdetected GitHub workflow tokens with excessive permissions
n/aVulnerabilitiesinternal error: vulnerabilitiesClient.ListUnfixedVulnerabilities: osvscanner.DoScan: client error: status="400 Bad Request" body={"code":3,"message":"error in query at index 962: rpc error: code = InvalidArgument desc = invalid hash"}
Direct dependencies 23
RegistryPackageVersion constraintManifest
npm@babel/core^7.16.10bench/package.json
npm@babel/preset-react^7.16.7bench/package.json
npm@babel/standalone^7.24.7bench/package.json
npm@swc/core^1.2.133bench/package.json
npmbenchmark^2.1.4bench/package.json
npmbraces^3.0.2bench/package.json
npmcolor^4.2.3bench/package.json
npmesbuild^0.14.12bench/package.json
npmeventemitter3^5.0.0bench/package.json
npmexeca^8.0.1bench/package.json
npmfast-glob3.3.1bench/package.json
npmfastify^5.0.0bench/package.json
npmfdir^6.1.0bench/package.json
npmmitata^1.0.25bench/package.json
npmreact^18.3.1bench/package.json
npmreact-dom^18.3.1bench/package.json
npmstring-width7.1.0bench/package.json
npmwrap-ansi^9.0.0bench/package.json
npmstrip-ansi^7.1.0bench/package.json
npmtar^7.4.3bench/package.json
npmtinycolor2^1.6.0bench/package.json
npmzx^7.2.3bench/package.json
npm@unicode/unicode-15.1.0^1.6.5misctools/package.json
All dependencies not collected

The resolved dependency set could not be collected for this report: GitHub dependency-graph SBOM unavailable (404); the dependency graph may be disabled for this repository

Raw JSON report machine-readable

Feedback

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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 v0.34.0 — full methodology · metrics wiki.

How one result sits in the wider record: aggregate statistics — npm.