# erlef/purl — health index 71/100 (Good)

> Inspection of the public repository erlef/purl by inspect.software. It holds a health index of 71 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/erlef/purl
- Report page: https://inspect.software/software/erlef/purl
- Full JSON report: https://inspect.software/api/repositories/erlef/purl/report
- Badge: https://raw.githubusercontent.com/inspect-software/badges/main/v1/e/erlef/purl.svg
- Inspected: 2026-07-22
- Methodology: metrics 1.13.0, report schema 0.26.0 (https://inspect.software/methodology.md)

## Category summary

| Category | Weight | Index | Band |
|---|---|---|---|
| Vitality | 22% | 89/100 | Excellent |
| Community & Adoption | 18% | 54/100 | Moderate |
| Sustainability & Governance | 24% | 65/100 | Moderate |
| Engineering Quality | 20% | 64/100 | Moderate |
| Security | 16% | 86/100 | Excellent |
| AI Readiness | not counted | 40/100 | At risk |

## Repository facts

| Field | Value |
|---|---|
| Description | Implementation of the purl (package url) specification. |
| Homepage | https://hex.pm/packages/purl |
| Primary language | Erlang |
| License | Apache-2.0 |
| Stars | 6 |
| Forks | 2 |
| Created | 2023-03-31 |
| Last push | 2026-07-20 |
| Latest release | v0.4.0 |
| Commits (last year) | 88 |
| Bus factor | 1 |
| Topics | elixir, elixir-lang, elixir-library, library, package-url, purl, erlang, erlang-library |

## Published packages

| Registry | Package | Latest | Monthly downloads |
|---|---|---|---|
| hex | purl | 0.4.0 | 24,283 |

## Vitality — 89/100 (Excellent)

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

### Development activity — 95/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Push recency | met | 36 / 36 | last push 2 days ago |
| Commit cadence | partial | 31.2 / 36 | 45/52 weeks with commits |
| Commit volume | partial | 17.5 / 18 | 88 commits in the last year |
| OpenSSF Scorecard: Maintained | met | 10 / 10 | 21 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10 |

### Release discipline — 80/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Ships releases | met | 27 / 27 | 9 releases published |
| Release recency | met | 36 / 36 | latest release 28 days ago |
| Release cadence | partial | 12.6 / 27 | a release every ~147.5 days |
| OpenSSF Scorecard: Signed-Releases | partial | 4 / 10 | 3 out of the last 5 releases have a total of 3 signed artifacts. |

### Abandonment — 100/100 (Excellent)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Project is still maintained | met | 100 / 100 | last human commit 28 days ago |

## Community & Adoption — 54/100 (Moderate)

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

### Popularity & adoption — 14/100 (Critical)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Stars | partial | 11.3 / 60 | 6 stars |
| Forks | not met | 0 / 25 | 2 forks |
| Watchers | partial | 2.7 / 15 | 4 watchers |

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

| Criterion | Status | Points | Detail |
|---|---|---|---|
| README | met | 22.5 / 22.5 | — |
| License | met | 22.5 / 22.5 | recognized license (Apache-2.0) |
| 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) — 73/100 (Good)

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

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Monthly downloads | partial | 58.5 / 80 | 24,283 downloads/month across hex |
| Registry dependents | excluded | 0 / 20 | not reported by this ecosystem |

## Sustainability & Governance — 65/100 (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) — 24/100 (Critical)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Bus factor | partial | 9 / 54 | 1 contributor(s) cover half of all commits |
| Commit distribution | partial | 0.7 / 22.5 | top contributor authored 97% of commits |
| Contributor breadth | partial | 4.1 / 13.5 | 3 contributors |
| OpenSSF Scorecard: Contributors | met | 10 / 10 | project has 9 contributing companies or organizations |

### Issue & PR responsiveness — 80/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Issue resolution | met | 46.8 / 46.8 | 100% of issues closed |
| PR acceptance | partial | 33.5 / 38.2 | 128/146 decided PRs merged |
| OpenSSF Scorecard: Code-Review | not met | 0 / 15 | Found 0/5 approved changesets -- score normalized to 0 |

### Ownership & stewardship — 71/100 (Good)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Ownership backing | met | 30 / 30 | organization-owned |
| Verified domain | not met | 0 / 20 | — |
| Owner reach | partial | 16.5 / 25 | 195 followers of erlef |
| Track record | partial | 24.5 / 25 | 51 public repos, account ~7 yr old |

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

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Published & resolvable | met | 25 / 25 | 1 package(s) on hex |
| Publish recency | met | 35 / 35 | latest publish 28 days ago |
| Version history | met | 20 / 20 | 9 published versions |
| Not deprecated | met | 20 / 20 | active, not deprecated or yanked |

## Engineering Quality — 64/100 (Moderate)

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

### Engineering practices — 64/100 (Moderate)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| CI workflows | met | 24 / 24 | 11 workflow(s) |
| Tests present | met | 24 / 24 | — |
| Linter config | not met | 0 / 16 | — |
| Pre-commit hooks | not met | 0 / 9.6 | — |
| .editorconfig | not met | 0 / 6.4 | — |
| OpenSSF Scorecard: CI-Tests | partial | 16 / 20 | 23 out of 26 merged PRs checked by a CI test -- score normalized to 8 |

### Documentation — 65/100 (Moderate)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| README | met | 30 / 30 | — |
| Documentation directory | not met | 0 / 25 | — |
| Documentation / homepage site | met | 15 / 15 | https://hex.pm/packages/purl |
| Repository description | met | 10 / 10 | — |
| Topics | met | 10 / 10 | 8 topics |
| Wiki | not met | 0 / 10 | — |

## Security — 86/100 (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 — 82/100 (Good)

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

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Binary-Artifacts | met | 7.5 / 7.5 | no binaries found in the repo |
| Branch-Protection | partial | 3 / 7.5 | branch protection is not maximal on development and all release branches |
| CI-Tests | partial | 2 / 2.5 | 23 out of 26 merged PRs checked by a CI test -- score normalized to 8 |
| CII-Best-Practices | partial | 1.2 / 2.5 | badge detected: Passing |
| Code-Review | not met | 0 / 7.5 | Found 0/5 approved changesets -- score normalized to 0 |
| Contributors | met | 2.5 / 2.5 | project has 9 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 | met | 7.5 / 7.5 | 21 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 10 |
| Packaging | excluded | 0 / 5 | packaging workflow not detected |
| Pinned-Dependencies | met | 5 / 5 | all dependencies are pinned |
| SAST | met | 5 / 5 | SAST tool is run on all commits |
| Security-Policy | met | 5 / 5 | security policy file detected |
| Signed-Releases | partial | 3 / 7.5 | 3 out of the last 5 releases have a total of 3 signed artifacts. |
| Token-Permissions | met | 7.5 / 7.5 | GitHub workflow tokens follow principle of least privilege |
| Vulnerabilities | met | 7.5 / 7.5 | 0 existing vulnerabilities detected |

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

Excluded from scoring (no data or not applicable): Indirect dependencies free of known advisories, No advisories left outstanding. Remaining weights renormalized. Matched 15 resolved dependencies against OSV. 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.

| 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 | excluded | 0 / 25 | transitive set not separable from development and test dependencies in this scope |
| No advisories left outstanding | excluded | 0 / 40 | no advisory carries a publication date |

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

| 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 (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 — 40/100 (At risk)

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 — 1/100 (Critical)

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

| 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 | excluded | 0 / 40 | no data |

### Verify loop (build / test / typecheck) — 63/100 (Moderate)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| One-command bootstrap | partial | 12.6 / 18 | mix.exs (toolchain convention, no task runner) |
| Automated tests | met | 22 / 22 | — |
| Lint / format config | not met | 0 / 11 | — |
| Static type checking | not met | 0 / 11 | — |
| Reproducible environment | met | 10 / 10 | lockfile |
| Demonstrated agent practice | not met | 0 / 10 | no agent-authored commits among the last 100 |
| Automated maintenance | met | 8 / 8 | 82 of the last 100 commits are automated dependency updates |
| OpenSSF Scorecard: Pinned-Dependencies | met | 10 / 10 | all dependencies are pinned |

### Code legibility for models — 55/100 (Moderate)

| Criterion | Status | Points | Detail |
|---|---|---|---|
| Type-checkable code | not met | 0 / 45 | Erlang without a type-check config |
| Manageable file sizes | met | 55 / 55 | 0/14 source files over 60KB |

## 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