pkgdiff

Every release note between two versions of a package, in one timeline: NuGet, npm, PyPI and pub.dev.

pkgdiff collects the release notes between any two versions of a package and shows them as one categorized timeline, so you can decide whether an upgrade is safe without jumping between registry pages, GitHub releases and changelog files.

🌐 Live: pkgdiff.dev

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What it does

• Lists every version between your current and your target version
• Finds the release notes of each one: GitHub Releases, the registry page or the changelog
• Sorts the changes into breaking changes, features, fixes, deprecations and security fixes
• Shows the result as one timeline you can export as Markdown, JSON, TOML or PDF

Supported registries

Registry	Status
NuGet	✅
npm	✅
PyPI	✅
pub.dev	✅

Features

• Version diff: pick a "from" and a "to" version and read everything that changed in between
• Several sources per registry: GitHub-first, registry-first and pub.dev strategies, chosen per package
• Categorized changes with a summary of breaking changes, features and fixes
• Cache: analysed packages are stored for 30 days and refreshed by background jobs
• Live progress over SignalR while an analysis runs, and a live feed of new versions on the home page
• Server-side rendering: every public page arrives as complete HTML, with real 404s for unknown packages
• Package trust: known vulnerabilities of every version (OSV), what an upgrade fixes and what it introduces, a warning for versions listed as malware, and project health (OpenSSF Scorecard, licenses, provenance)
• Dependency audit: paste a package.json, package-lock.json, .csproj, Directory.Packages.props, packages.config, packages.lock.json, requirements.txt, pyproject.toml, poetry.lock, Pipfile(.lock), pubspec.yaml or pubspec.lock and get a shareable report of every package's known vulnerabilities and the version that fixes them (https://pkgdiff.dev/audit)
• Export as Markdown, JSON, TOML or PDF
• Admin panel with roles and permissions, request and scrape logs, IP blocking, jobs and settings
• Monitoring: Prometheus metrics and a provisioned Grafana dashboard

Security data and attribution

Security data is collected by background jobs and never while a visitor waits:

• Vulnerabilities: OSV.dev for NuGet, npm, PyPI and pub.dev, including the OpenSSF malicious-packages records.
• Project health: deps.dev for npm, PyPI and NuGet (licenses, provenance and the OpenSSF Scorecard of the source repository). deps.dev data is licensed under CC BY 4.0 and is shown with that attribution.
• Behaviour analysis (optional, off by default): Socket.dev alerts and scores for npm, PyPI and NuGet, shown only after Socket has allowed public display.
• Scorecard for pub.dev: the OpenSSF Scorecard API for packages whose repository is on GitHub.

Tech stack

Backend: .NET 10, ASP.NET Core, Entity Framework Core with PostgreSQL 18, Hangfire, SignalR, Redis, Polly, AngleSharp, QuestPDF.

Frontend: Angular 21 (standalone components, signals, zoneless) with @angular/ssr, Tailwind CSS, Lucide icons.

Operations: Docker Compose on one host, images built and scanned in GitHub Actions and pulled from GHCR, nginx in front, Prometheus and Grafana.

Repository layout

src/
  backend/
    PkgDiff.API/             controllers, middleware, hubs, composition root
    PkgDiff.Application/     services, interfaces (ports), background jobs
    PkgDiff.Domain/          entities and persistence contracts
    PkgDiff.Infrastructure/  EF Core, registry clients, scraping
    PkgDiff.Shared/          DTOs and constants
    PkgDiff.Tests/           unit and integration tests
  frontend/                  Angular application and its render server (src/server.ts)
deploy/                    deploy, rollback and backup scripts, host nginx, Grafana provisioning
.github/scripts/           dependency gate, QuestPDF CPU check and their tests

Running it locally

Prerequisites: .NET 10 SDK, Node.js 22 with npm, PostgreSQL and Redis on localhost (or docker compose up -d db redis with a .env made from .env.example).

Backend

src/backend/PkgDiff.API/appsettings.json holds the defaults and no secrets. Put your own values in src/backend/PkgDiff.API/appsettings.Development.json, which git ignores:

{
  "ConnectionStrings": { "DefaultConnection": "Host=localhost;Database=pkgdiffdb;Username=postgres;Password=..." },
  "JwtSettings": { "SecretKey": "<32 or more random bytes>", "Issuer": "PkgDiffAPI", "Audience": "PkgDiffClient" },
  "Security": { "SettingsEncryptionKey": "<base64 of 32 random bytes>" },
  "AdminSettings": { "AdminPassword": "<password of the first administrator>" }
}

cd src/backend
dotnet run --project PkgDiff.API

The API applies its migrations on start and listens on http://localhost:5054 (Swagger at /swagger in Development).

Frontend

cd src/frontend
npm ci
npm start

The application runs on http://localhost:4200, rendered on the server by the development server as in production.

Tests

dotnet test --project src/backend/PkgDiff.Tests/PkgDiff.Tests.csproj
cd src/frontend && npm test -- --watch=false && npm run build && npm run test:ssr
node --test .github/scripts/tests/*.test.mjs

Backend tests that need PostgreSQL run when PKGDIFF_TEST_POSTGRES holds a connection string (without a database name); without it they are skipped.

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