# lit/lit — health index 96/100 (Exceptional)

> Inspection of the public repository lit/lit by inspect.software. It holds a health index of 96 out of 100, placing it in the Exceptional 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/lit/lit
- Report page: https://inspect.software/software/lit/lit
- Full JSON report: https://inspect.software/api/repositories/lit/lit/report
- Badge: https://raw.githubusercontent.com/inspect-software/badges/main/v1/l/lit/lit.svg
- Inspected: 2026-08-12
- Methodology: metrics 2.10.0, report schema 0.31.0 (https://inspect.software/methodology.md)

## Category summary

| Category | Weight | Index | Band |
|---|---|---|---|
| Vitality | 21% | 81/100 | Excellent |
| Community & Adoption | 17% | 94/100 | Exceptional |
| Sustainability & Governance | 23% | 81/100 | Excellent |
| Engineering Quality | 19% | 83/100 | Excellent |
| Security | 16% | 83/100 | Excellent |
| AI Readiness | 4% | 78/100 | Good |

The weighted overall 84 is calibrated to 96 on the published index scale (record calibration 2026-08-02).

## Repository facts

| Field | Value |
|---|---|
| Description | Lit is a simple library for building fast, lightweight web components. |
| Classification | library, cli |
| Homepage | https://lit.dev |
| Primary language | TypeScript |
| License | BSD-3-Clause |
| Stars | 21,771 |
| Forks | 1,091 |
| Created | 2017-06-29 |
| Last push | 2026-07-25 |
| Latest release | @lit-labs/ssr-dom-shim@1.6.0 |
| Commits (last year) | 69 |
| Bus factor | 3 |
| Topics | lit-html, lit-element, html-templates, lit |

## Published packages

| Registry | Package | Latest | Monthly downloads |
|---|---|---|---|
| npm | lit | 3.3.3 | 27,914,272 |
| npm | @lit/task | 1.0.3 | 1,071,302 |
| npm | @lit/react | 1.0.8 | 12,490,223 |
| npm | @lit/context | 1.1.6 | 5,124,363 |
| npm | lit-html | 3.3.3 | 27,285,853 |
| npm | @lit/localize | 0.12.2 | 360,893 |
| npm | lit-element | 4.2.2 | 25,886,355 |
| npm | @lit/localize-tools | 0.8.2 | 105,108 |

## Vitality — 81/100 (Excellent)

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

### Development activity — 68/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Push recency | partial | 28.8 / 36 | last push 18 days ago |
| Commit cadence | partial | 13.8 / 36 | 20/52 weeks with commits |
| Commit volume | partial | 16.6 / 18 | 69 commits in the last year |
| OpenSSF Scorecard: Maintained | partial | 9 / 10 | 3 commit(s) and 8 issue activity found in the last 90 days -- score normalized to 9 |

### Release discipline — 100/100 (Exceptional)

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

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Ships releases | met | 27 / 27 | 100 releases published |
| Release recency | met | 36 / 36 | latest release 90 days ago |
| Release cadence | met | 27 / 27 | a release every ~34.1 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 59 days ago |

## Community & Adoption — 94/100 (Exceptional)

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

### Popularity & adoption — 98/100 (Exceptional)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Stars | met | 60 / 60 | 21,771 stars |
| Forks | met | 25 / 25 | 1,091 forks |
| Watchers | partial | 12.9 / 15 | 212 watchers |

### Community health — 85/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| README | met | 22.5 / 22.5 | — |
| License | met | 22.5 / 22.5 | recognized license (BSD-3-Clause) |
| CONTRIBUTING guide | met | 18 / 18 | — |
| Code of conduct | met | 13.5 / 13.5 | — |
| Issue template | not met | 0 / 7.2 | — |
| PR template | not met | 0 / 6.3 | — |

### Ecosystem adoption (downloads) — 100/100 (Exceptional)

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

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Monthly downloads | met | 80 / 80 | 100,238,369 downloads/month across npm |
| Registry dependents | excluded | 0 / 20 | not reported by this ecosystem |

## Sustainability & Governance — 81/100 (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) — 75/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Bus factor | partial | 36 / 54 | 3 contributor(s) cover half of all commits |
| Commit distribution | partial | 15.4 / 22.5 | top contributor authored 32% of commits |
| Contributor breadth | met | 13.5 / 13.5 | 98 contributors |
| OpenSSF Scorecard: Contributors | met | 10 / 10 | project has 58 contributing companies or organizations |

### Issue & PR responsiveness — 68/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Issue resolution | partial | 32 / 42 | 76% of issues closed |
| PR acceptance | partial | 22.8 / 30 | 1897/2496 decided PRs merged |
| Newcomer PR acceptance | not met | 0 / 13 | 0/1 first-time contributors' PRs merged in 30d |
| OpenSSF Scorecard: Code-Review | partial | 13.5 / 15 | Found 29/30 approved changesets -- score normalized to 9 |

### Ownership & stewardship — 87/100 (Excellent)

Excluded from scoring (no data or not applicable): Verified domain. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Ownership backing | met | 30 / 30 | organization-owned |
| Verified domain | excluded | 0 / 20 | verified-domain status not read for this organization |
| Owner reach | partial | 19.6 / 25 | 532 followers of lit |
| Track record | partial | 20.1 / 25 | 12 public repos, account ~10 yr old |

### Package maintenance — 100/100 (Exceptional)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Published & resolvable | met | 25 / 25 | 8 package(s) on npm |
| Publish recency | met | 35 / 35 | latest publish 90 days ago |
| Version history | met | 20 / 20 | 107 published versions |
| Not deprecated | met | 20 / 20 | active, not deprecated or yanked |

## Engineering Quality — 83/100 (Excellent)

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

### Engineering practices — 88/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| CI workflows | met | 24 / 24 | 9 workflow(s) |
| Tests present | met | 24 / 24 | — |
| Linter config | met | 16 / 16 | .eslintrc.json |
| Pre-commit hooks | not met | 0 / 9.6 | — |
| .editorconfig | met | 6.4 / 6.4 | — |
| OpenSSF Scorecard: CI-Tests | partial | 18 / 20 | 29 out of 30 merged PRs checked by a CI test -- score normalized to 9 |

### Documentation — 75/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| README | met | 30 / 30 | — |
| Documentation directory | not met | 0 / 25 | — |
| Documentation / homepage site | met | 15 / 15 | https://lit.dev |
| Repository description | met | 10 / 10 | — |
| Topics | met | 10 / 10 | 4 topics |
| Wiki | met | 10 / 10 | — |

## Security — 83/100 (Excellent)

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 — 79/100 (Good)

Excluded from scoring (no data or not applicable): Branch-Protection, Packaging, Signed-Releases. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Binary-Artifacts | met | 7.5 / 7.5 | no binaries found in the repo |
| Branch-Protection | excluded | 0 / 7.5 | internal 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 |
| CI-Tests | partial | 2.2 / 2.5 | 29 out of 30 merged PRs checked by a CI test -- score normalized to 9 |
| CII-Best-Practices | not met | 0 / 2.5 | no effort to earn an OpenSSF best practices badge detected |
| Code-Review | partial | 6.8 / 7.5 | Found 29/30 approved changesets -- score normalized to 9 |
| Contributors | met | 2.5 / 2.5 | project has 58 contributing companies or organizations |
| Dangerous-Workflow | met | 10 / 10 | no dangerous workflow patterns detected |
| Dependency-Update-Tool | met | 7.5 / 7.5 | update tool detected |
| Fuzzing | met | 5 / 5 | project is fuzzed |
| License | met | 2.5 / 2.5 | license file detected |
| Maintained | partial | 6.8 / 7.5 | 3 commit(s) and 8 issue activity found in the last 90 days -- score normalized to 9 |
| Packaging | excluded | 0 / 5 | packaging workflow not detected |
| Pinned-Dependencies | partial | 1.5 / 5 | dependency not pinned by hash detected -- score normalized to 3 |
| SAST | partial | 2.5 / 5 | SAST tool is not run on all commits -- score normalized to 5 |
| Security-Policy | met | 5 / 5 | security policy file detected |
| Signed-Releases | excluded | 0 / 7.5 | no releases found |
| Token-Permissions | met | 7.5 / 7.5 | GitHub workflow tokens follow principle of least privilege |
| Vulnerabilities | not met | 0 / 7.5 | 228 existing vulnerabilities detected |

### Dependency advisories — 100/100 (Exceptional)

Excluded from scoring (no data or not applicable): No advisories left outstanding. Remaining weights renormalized. Matched the npm:lit@3.3.3 runtime dependency closure — what installing the published package pulls in — 5 packages. Reachability is not analyzed.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Direct dependencies free of known advisories | met | 35 / 35 | no direct dependency carries a known advisory |
| Indirect dependencies free of known advisories | met | 25 / 25 | no indirect dependency carries a known advisory |
| No advisories left outstanding | excluded | 0 / 40 | no advisory carries a publication date |

### Malicious dependencies — 100/100 (Exceptional)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| No dependency reported as a malicious package | met | 100 / 100 | no dependency is reported as a malicious package |

### 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 — 78/100 (Good)

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 — 83/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Agent instructions | met | 45 / 45 | .clinerules, .cursorrules, .github/copilot-instructions.md, AGENTS.md, CLAUDE.md |
| Machine-readable docs (llms.txt) | not met | 0 / 15 | — |
| Legible commit history | partial | 38.4 / 40 | 72 of 100 human commits state their intent (structured subject or explanatory body) |

### Verify loop (build / test / typecheck) — 57/100 (Moderate)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| One-command bootstrap | not met | 0 / 18 | — |
| Automated tests | met | 22 / 22 | — |
| Lint / format config | met | 11 / 11 | .eslintrc.json |
| Static type checking | met | 11 / 11 | examples/nextjs-v13/tsconfig.json, examples/nextjs-v14-app/tsconfig.json, examples/nextjs-v14/tsconfig.json, examples/nextjs-v15-app/tsconfig.json, examples/nextjs-v15/tsconfig.json, examples/nextjs-v16-app/tsconfig.json, examples/nextjs-v16/tsconfig.json, examples/preact/tsconfig.json, packages/benchmarks/generator/tsconfig.json, packages/benchmarks/tsconfig.json, packages/context/tsconfig.json, packages/internal-scripts/tsconfig.json, packages/labs/analyzer/test-files/ts/basic-elements/tsconfig.json, packages/labs/analyzer/test-files/ts/basic-templates/tsconfig.json, packages/labs/analyzer/test-files/ts/circular-modules/tsconfig.json, packages/labs/analyzer/test-files/ts/classes/tsconfig.json, packages/labs/analyzer/test-files/ts/events/tsconfig.json, packages/labs/analyzer/test-files/ts/functions/tsconfig.json, packages/labs/analyzer/test-files/ts/jsdoc/tsconfig.json, packages/labs/analyzer/test-files/ts/mixins/tsconfig.json, packages/labs/analyzer/test-files/ts/modules/tsconfig.json, packages/labs/analyzer/test-files/ts/node-next-resolution/tsconfig.json, packages/labs/analyzer/test-files/ts/properties/tsconfig.json, packages/labs/analyzer/test-files/ts/templates/tsconfig.json, packages/labs/analyzer/test-files/ts/types/tsconfig.json, packages/labs/analyzer/test-files/ts/vanilla-events/tsconfig.json, packages/labs/analyzer/test-files/ts/vanilla-jsdoc/tsconfig.json, packages/labs/analyzer/tsconfig.json, packages/labs/cli-localize/tsconfig.json, packages/labs/cli/test-goldens/init/ts-named/tsconfig.json, packages/labs/cli/tsconfig.json, packages/labs/compiler/test_files/source_map_tests/tsconfig.json, packages/labs/compiler/test_files/tsconfig.json, packages/labs/compiler/tsconfig.json, packages/labs/context/tsconfig.json, packages/labs/eleventy-plugin-lit/tsconfig.json, packages/labs/eslint-plugin/fixture/tsconfig.json, packages/labs/eslint-plugin/tsconfig.json, packages/labs/forms/tsconfig.json, packages/labs/gen-manifest/tsconfig.json, packages/labs/gen-utils/tsconfig.json, packages/labs/gen-wrapper-angular/goldens/test-element-a/tsconfig.json, packages/labs/gen-wrapper-angular/tsconfig.json, packages/labs/gen-wrapper-react/goldens/test-element-a/tsconfig.json, packages/labs/gen-wrapper-react/test-output/tsconfig.json, packages/labs/gen-wrapper-react/tsconfig.json, packages/labs/gen-wrapper-vue/goldens/test-element-a/tsconfig.json, packages/labs/gen-wrapper-vue/test-output/tsconfig.json, packages/labs/gen-wrapper-vue/tsconfig.json, packages/labs/motion/tsconfig.json, packages/labs/nextjs/tsconfig.json, packages/labs/observers/tsconfig.json, packages/labs/preact-signals/tsconfig.json, packages/labs/react/tsconfig.json, packages/labs/rollup-plugin-minify-html-literals/tsconfig.json, packages/labs/router/tsconfig.json, packages/labs/scoped-registry-mixin/tsconfig.json, packages/labs/signals/tsconfig.json, packages/labs/ssr-client/tsconfig.json, packages/labs/ssr-dom-shim/tsconfig.json, packages/labs/ssr-react/tsconfig.json, packages/labs/ssr/tsconfig.json, packages/labs/task/tsconfig.json, packages/labs/test-projects/test-element-a/tsconfig.json, packages/labs/test-projects/test-elements-react/tsconfig.json, packages/labs/testing/tsconfig.json, packages/labs/tsserver-plugin/example/tsconfig.json, packages/labs/tsserver-plugin/test-files/basic-templates/tsconfig.json, packages/labs/tsserver-plugin/tsconfig.json, packages/labs/virtualizer/tsconfig.json, packages/labs/vscode-extension/tsconfig.json, packages/labs/vue-utils/tsconfig.json, packages/lit-element/tsconfig.json, packages/lit-html/tsconfig.json, packages/lit-starter-ts/tsconfig.json, packages/lit/tsconfig.json, packages/localize-tools/testdata/build-runtime-xlb/goldens/tsconfig.json, packages/localize-tools/testdata/build-runtime-xlb/input/tsconfig.json, packages/localize-tools/testdata/build-runtime-xliff-ph/goldens/tsconfig.json, packages/localize-tools/testdata/build-runtime-xliff-ph/input/tsconfig.json, packages/localize-tools/testdata/build-runtime-xliff/goldens/tsconfig.json, packages/localize-tools/testdata/build-runtime-xliff/input/tsconfig.json, packages/localize-tools/testdata/build-transform-xliff-std/goldens/tsconfig.json, packages/localize-tools/testdata/build-transform-xliff-std/input/tsconfig.json, packages/localize-tools/testdata/build-transform-xliff/goldens/tsconfig.json, packages/localize-tools/testdata/build-transform-xliff/input/tsconfig.json, packages/localize-tools/testdata/extract-xlb-fresh/goldens/tsconfig.json, packages/localize-tools/testdata/extract-xlb-fresh/input/tsconfig.json, packages/localize-tools/testdata/extract-xliff-fresh-ph/goldens/tsconfig.json, packages/localize-tools/testdata/extract-xliff-fresh-ph/input/tsconfig.json, packages/localize-tools/testdata/extract-xliff-fresh/goldens/tsconfig.json, packages/localize-tools/testdata/extract-xliff-fresh/input/tsconfig.json, packages/localize-tools/testdata/extract-xliff-merge/goldens/tsconfig.json, packages/localize-tools/testdata/extract-xliff-merge/input/tsconfig.json, packages/localize-tools/testdata/placeholder-errors/goldens/tsconfig.json, packages/localize-tools/testdata/placeholder-errors/input/tsconfig.json, packages/localize-tools/tsconfig.json, packages/localize/examples/runtime-ts/tsconfig.json, packages/localize/examples/transform-js/jsconfig.json, packages/localize/examples/transform-ts/tsconfig.json, packages/localize/tsconfig.json, packages/react/tsconfig.json, packages/reactive-element/tsconfig.json, packages/task/tsconfig.json, packages/tests/tsconfig.json, packages/ts-transformers/tsconfig.json, playground/tsconfig.json |
| Reproducible environment | met | 10 / 10 | lockfile |
| 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 | 3 / 10 | dependency not pinned by hash detected -- score normalized to 3 |

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

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Type-checkable code | met | 45 / 45 | TypeScript (statically typed) |
| Manageable file sizes | partial | 54.6 / 55 | 7/1085 source files over 60KB |

### Machine-readable interfaces — 100/100 (Exceptional)

Excluded from scoring (no data or not applicable): API schema (OpenAPI/GraphQL/proto), MCP server. Remaining weights renormalized.

| Criterion | Status | Points | Detail |
|---|---|---|---|
| API schema (OpenAPI/GraphQL/proto) | excluded | 0 / 40 | not applicable to this kind of software |
| MCP server | excluded | 0 / 20 | not applicable to this kind of software |
| Runnable examples | met | 40 / 40 | example, examples |

## Collection warnings

- Star history unavailable: GitHub GraphQL error: Resource not accessible by personal access token

## 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