# oven-sh/bun — health index 80/100 (Good)

> Inspection of the public repository oven-sh/bun by inspect.software. It holds a health index of 80 out of 100, placing it in the Good 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/oven-sh/bun
- Report page: https://inspect.software/software/oven-sh/bun
- Full JSON report: https://inspect.software/api/repositories/oven-sh/bun/report
- Badge: https://raw.githubusercontent.com/inspect-software/badges/main/v1/o/oven-sh/bun.svg
- Inspected: 2026-07-15
- Methodology: metrics 1.13.0, report schema 0.11.0 (https://inspect.software/methodology.md)

## Category summary

| Category | Weight | Index | Band |
|---|---|---|---|
| Vitality | 22% | 99/100 | Excellent |
| Community & Adoption | 18% | 87/100 | Excellent |
| Sustainability & Governance | 24% | 63/100 | Moderate |
| Engineering Quality | 20% | 90/100 | Excellent |
| Security | 16% | 56/100 | Moderate |
| AI Readiness | not counted | 87/100 | Excellent |

## Repository facts

| Field | Value |
|---|---|
| Description | Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one |
| Homepage | https://bun.com |
| Primary language | Rust |
| Stars | 94,769 |
| Forks | 4,977 |
| Created | 2021-04-14 |
| Last push | 2026-07-15 |
| Latest release | bun-v1.3.14 |
| Commits (last year) | 3,219 |
| Bus factor | 1 |
| Topics | bun, bundler, javascript, javascriptcore, jsx, nodejs, npm, react, transpiler, typescript, rust, rust-lang |

## Published packages

| Registry | Package | Latest | Monthly downloads |
|---|---|---|---|
| npm | bench | 0.3.6 | 14,360 |

## Vitality — 99/100 (Excellent)

Is the project alive — is code being written and are releases shipping? Weight: 22% of the overall index.

### Development activity — 100/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Push recency | met | 36 / 36 | last push 0 days ago |
| Commit cadence | met | 36 / 36 | 52/52 weeks with commits |
| Commit volume | met | 18 / 18 | 3219 commits in the last year |
| OpenSSF Scorecard: Maintained | met | 10 / 10 | 30 commit(s) and 17 issue activity found in the last 90 days -- score normalized to 10 |

### Release discipline — 98/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Ships releases | met | 27 / 27 | 100 releases published |
| Release recency | met | 36 / 36 | latest release 63 days ago |
| Release cadence | met | 27 / 27 | a release every ~16.3 days |
| OpenSSF Scorecard: Signed-Releases | partial | 8 / 10 | 5 out of the last 5 releases have a total of 5 signed artifacts. |

### Abandonment — 100/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Project is still maintained | met | 100 / 100 | maintenance record not established from the collected data |

## Community & Adoption — 87/100 (Excellent)

Does the project have users, downloads, attention, and a welcoming setup for contributors? Weight: 18% of the overall index.

### Popularity & adoption — 100/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Stars | met | 60 / 60 | 94,769 stars |
| Forks | met | 25 / 25 | 4,977 forks |
| Watchers | met | 15 / 15 | 700 watchers |

### Community health — 86/100 (Excellent)

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

### Ecosystem adoption (downloads) — 69/100 (Moderate)

Excluded from scoring (no data or not applicable): Registry dependents. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Monthly downloads | partial | 55.4 / 80 | 14,360 downloads/month across npm |
| Registry dependents | excluded | 0 / 20 | not reported by this ecosystem |

## Sustainability & Governance — 63/100 (Moderate)

Will the project survive its people — bus factor, responsiveness, who backs it, and package upkeep? Weight: 24% of the overall index.

### Maintainer resilience (bus factor) — 42/100 (At risk)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Bus factor | partial | 9 / 54 | 1 contributor(s) cover half of all commits |
| Commit distribution | partial | 9.9 / 22.5 | top contributor authored 56% of commits |
| Contributor breadth | met | 13.5 / 13.5 | 100 contributors |
| OpenSSF Scorecard: Contributors | met | 10 / 10 | project has 65 contributing companies or organizations |

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

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Issue resolution | partial | 32.8 / 46.8 | 70% of issues closed |
| PR acceptance | partial | 24.5 / 38.2 | 8649/13513 decided PRs merged |
| OpenSSF Scorecard: Code-Review | met | 15 / 15 | all changesets reviewed |

### Ownership & stewardship — 74/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Ownership backing | met | 30 / 30 | organization-owned |
| Verified domain | not met | 0 / 20 | — |
| Owner reach | met | 25 / 25 | 3,767 followers of oven-sh |
| Track record | partial | 18.9 / 25 | 30 public repos, account ~4 yr old |

### Package maintenance — 69/100 (Moderate)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Published & resolvable | met | 25 / 25 | 1 package(s) on npm |
| Publish recency | partial | 4 / 35 | latest publish 3929 days ago |
| Version history | met | 20 / 20 | 8 published versions |
| Not deprecated | met | 20 / 20 | active, not deprecated or yanked |

## Engineering Quality — 90/100 (Excellent)

Are baseline engineering and documentation practices in place? Weight: 20% of the overall index.

### Engineering practices — 90/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| CI workflows | met | 24 / 24 | 30 workflow(s) |
| Tests present | met | 24 / 24 | — |
| Linter config | met | 16 / 16 | .eslintrc.cjs, .eslintrc.js, .eslintrc.json, eslint.config.mjs |
| Pre-commit hooks | not met | 0 / 9.6 | — |
| .editorconfig | met | 6.4 / 6.4 | — |
| OpenSSF Scorecard: CI-Tests | met | 20 / 20 | 30 out of 30 merged PRs checked by a CI test -- score normalized to 10 |

### Documentation — 90/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| README | met | 30 / 30 | — |
| Documentation directory | met | 25 / 25 | — |
| Documentation / homepage site | met | 15 / 15 | https://bun.com |
| Repository description | met | 10 / 10 | — |
| Topics | met | 10 / 10 | 12 topics |
| Wiki | not met | 0 / 10 | — |

## Security — 56/100 (Moderate)

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 — 56/100 (Moderate)

Excluded from scoring (no data or not applicable): Packaging, Vulnerabilities. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Binary-Artifacts | not met | 0 / 7.5 | binaries present in source code |
| Branch-Protection | partial | 6 / 7.5 | branch protection is not maximal on development and all release branches |
| CI-Tests | met | 2.5 / 2.5 | 30 out of 30 merged PRs checked by a CI test -- score normalized to 10 |
| CII-Best-Practices | not met | 0 / 2.5 | no effort to earn an OpenSSF best practices badge detected |
| Code-Review | met | 7.5 / 7.5 | all changesets reviewed |
| Contributors | met | 2.5 / 2.5 | project has 65 contributing companies or organizations |
| Dangerous-Workflow | met | 10 / 10 | no dangerous workflow patterns detected |
| Dependency-Update-Tool | not met | 0 / 7.5 | no update tool detected |
| Fuzzing | not met | 0 / 5 | project is not fuzzed |
| License | partial | 2.2 / 2.5 | license file detected |
| Maintained | met | 7.5 / 7.5 | 30 commit(s) and 17 issue activity found in the last 90 days -- score normalized to 10 |
| Packaging | excluded | 0 / 5 | packaging workflow not detected |
| Pinned-Dependencies | partial | 2.5 / 5 | dependency not pinned by hash detected -- score normalized to 5 |
| SAST | not met | 0 / 5 | SAST tool is not run on all commits -- score normalized to 0 |
| Security-Policy | met | 5 / 5 | security policy file detected |
| Signed-Releases | partial | 6 / 7.5 | 5 out of the last 5 releases have a total of 5 signed artifacts. |
| Token-Permissions | not met | 0 / 7.5 | detected GitHub workflow tokens with excessive permissions |
| Vulnerabilities | excluded | 0 / 7.5 | internal error: vulnerabilitiesClient.ListUnfixedVulnerabilities: osvscanner.DoScan: client error: status="400 Bad Request" body={"code":3,"message":"error in query at index 457: rpc error: code = InvalidArgument desc = invalid hash"} |

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

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 — 87/100 (Excellent)

How well is the repo equipped to be developed and maintained with AI coding agents? An independent, experimental badge — weight 0.0, so it is surfaced on its own and does not affect the overall health score.

### Agent context & guidance — 75/100 (Good)

Excluded from scoring (no data or not applicable): Legible commit history. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Agent instructions | met | 45 / 45 | .github/workflows/CLAUDE.md, AGENTS.md, CLAUDE.md, scripts/build/CLAUDE.md, scripts/verify-baseline-static/CLAUDE.md, src/AGENTS.md, src/CLAUDE.md, src/js/AGENTS.md, src/js/CLAUDE.md, src/jsc/bindings/v8/AGENTS.md, src/jsc/bindings/v8/CLAUDE.md, test/AGENTS.md, test/CLAUDE.md, test/js/node/test/parallel/CLAUDE.md |
| Machine-readable docs (llms.txt) | not met | 0 / 15 | — |
| Legible commit history | excluded | 0 / 40 | no data |

### Verify loop (build / test / typecheck) — 94/100 (Excellent)

Excluded from scoring (no data or not applicable): Demonstrated agent practice, Automated maintenance. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| One-command bootstrap | met | 18 / 18 | packages/h3blast/Makefile, test/js/node/test/fixtures/keys/Makefile |
| Automated tests | met | 22 / 22 | — |
| Lint / format config | met | 11 / 11 | .eslintrc.cjs, .eslintrc.js, .eslintrc.json, eslint.config.mjs |
| Static type checking | met | 11 / 11 | 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, scripts/build/tsconfig.json, src/codegen/bindgenv2/tsconfig.json, src/js/tsconfig.json, src/node-fallbacks/tsconfig.json, src/runtime/bake/tsconfig.json, src/runtime/cli/create/projects/react-shadcn-spa/tsconfig.json, src/runtime/cli/init/react-app/tsconfig.json, src/runtime/cli/init/react-shadcn/tsconfig.json, src/runtime/cli/init/react-tailwind/tsconfig.json, src/runtime/test_runner/harness/fixtures/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 |
| Reproducible environment | met | 10 / 10 | Dockerfile, Nix, lockfile |
| Demonstrated agent practice | excluded | 0 / 10 | no data |
| Automated maintenance | excluded | 0 / 8 | no data |
| OpenSSF Scorecard: Pinned-Dependencies | partial | 5 / 10 | dependency not pinned by hash detected -- score normalized to 5 |

### Code legibility for models — 99/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Type-checkable code | met | 45 / 45 | Rust (statically typed) |
| Manageable file sizes | partial | 53.6 / 55 | 324/12640 source files over 60KB |

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

| Criterion | Status | Points | Detail |
|---|---|---|---|
| API schema (OpenAPI/GraphQL/proto) | met | 40 / 40 | 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 |
| MCP server | not met | 0 / 20 | — |
| Runnable examples | met | 40 / 40 | example |

## Collection warnings

- Could not fetch npm package 'misctools' from its registry
- Resolved dependency list truncated to 2000 of 4431 packages (counts remain complete)

## 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