fix(packagist): register Packagist in the test registries and the home page copy

The registry tests build their own client list and checked a package
id that is not a vendor/name; the SSR smoke test and index.html still
named four registries.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: Enes Yağız

src/backend/PkgDiff.Tests/Registries/RegistryClientTests.cs

@@ -22,6 +22,7 @@ public class RegistryClientTests
     [InlineData("PyPI", "pypi", "PyPI", VersionScheme.Pep440, true, false)]
     [InlineData("pub", "pub.dev", "PubDev", VersionScheme.SemVer, true, true)]
     [InlineData("pub.dev", "pub.dev", "PubDev", VersionScheme.SemVer, true, true)]
+    [InlineData("composer", "packagist", "Packagist", VersionScheme.Composer, true, false)]
     public void Every_spelling_of_a_registry_reaches_its_one_client(
         string spelling, string id, string label, VersionScheme scheme, bool includesStart, bool publishesNotes)
     {
@@ -65,7 +66,8 @@ public void Every_registry_name_has_a_client_and_a_package_id_grammar()
         {
             Assert.Equal(name, factory.GetClient(name).Id);
             Assert.Equal(name, RegistryNames.Canonical(name.ToUpperInvariant()));
-            Assert.True(PkgDiff.Shared.Validation.PackageIdRules.IsValidPackageId(name, "abc"));
+            var sample = name == RegistryNames.Packagist ? "abc/def" : "abc";
+            Assert.True(PkgDiff.Shared.Validation.PackageIdRules.IsValidPackageId(name, sample));
         });
         Assert.Equal(new[] { "pub.dev", "pub" }, RegistryNames.SpellingsOf("PUB"));
         Assert.Equal(new[] { "npm" }, RegistryNames.SpellingsOf("npm"));

src/backend/PkgDiff.Tests/TestDoubles/TestRegistries.cs

@@ -18,7 +18,8 @@ public static RegistryServiceFactory Create(
         IVersionFilterService? versionFilter = null,
         GitHubFirstScrapingStrategy? githubFirst = null,
         NuGetFirstScrapingStrategy? nugetFirst = null,
-        PubDevScrapingStrategy? pubDevStrategy = null)
+        PubDevScrapingStrategy? pubDevStrategy = null,
+        IPackagistService? packagist = null)
     {
         versionFilter ??= new VersionFilterService(
             new FakeUnitOfWork(), new MemoryCache(new MemoryCacheOptions()), NullLogger<VersionFilterService>.Instance);
@@ -28,7 +29,8 @@ public static RegistryServiceFactory Create(
             new NuGetRegistryClient(nuget!, nugetPage!, githubFirst!, nugetFirst!),
             new NpmRegistryClient(npm!, githubFirst!, versionFilter, NullLogger<NpmRegistryClient>.Instance),
             new PyPIRegistryClient(pypi!, githubFirst!, versionFilter, NullLogger<PyPIRegistryClient>.Instance),
-            new PubDevRegistryClient(pubDev!, pubDevStrategy!, versionFilter, NullLogger<PubDevRegistryClient>.Instance)
+            new PubDevRegistryClient(pubDev!, pubDevStrategy!, versionFilter, NullLogger<PubDevRegistryClient>.Instance),
+            new PackagistRegistryClient(packagist!, githubFirst!, versionFilter, NullLogger<PackagistRegistryClient>.Instance)
         ]);
     }
 }

src/frontend/src/index.html

@@ -15,11 +15,11 @@
     })();
   </script>
   <meta charset="utf-8">
-  <title>pkgdiff — Compare NuGet, npm, PyPI & Pub Packages</title>
+  <title>pkgdiff — Compare NuGet, npm, PyPI, Pub & Packagist Packages</title>
   <base href="/">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="description"
-    content="Free tool to compare package versions across NuGet, npm, PyPI & Pub. Track breaking changes, view release notes, and analyze version differences between any two versions.">
+    content="Free tool to compare package versions across NuGet, npm, PyPI, Pub & Packagist. Track breaking changes, view release notes, and analyze version differences between any two versions.">
   <meta name="author" content="Enes Yağız (fleizean)">
   <meta name="publisher" content="pkgdiff">
   <meta name="robots" content="index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1">
@@ -35,29 +35,29 @@
   <meta property="og:type" content="website">
   <meta property="og:site_name" content="pkgdiff">
   <meta property="og:title"
-    content="pkgdiff — Compare NuGet, npm, PyPI & Pub Packages">
+    content="pkgdiff — Compare NuGet, npm, PyPI, Pub & Packagist Packages">
   <meta property="og:description"
-    content="Free tool to compare package versions across NuGet, npm, PyPI & Pub. Track breaking changes, view release notes, and analyze version differences between any two versions.">
+    content="Free tool to compare package versions across NuGet, npm, PyPI, Pub & Packagist. Track breaking changes, view release notes, and analyze version differences between any two versions.">
   <meta property="og:url" content="https://pkgdiff.dev/">
   <meta property="og:locale" content="en_US">
   <meta property="og:image" content="https://pkgdiff.dev/og-image/home.png">
   <meta property="og:image:secure_url" content="https://pkgdiff.dev/og-image/home.png">
   <meta property="og:image:type" content="image/png">
   <meta property="og:image:width" content="1200">
   <meta property="og:image:height" content="630">
-  <meta property="og:image:alt" content="pkgdiff — Compare Package Versions Across NuGet, npm, PyPI & Pub">
+  <meta property="og:image:alt" content="pkgdiff — Compare Package Versions Across NuGet, npm, PyPI, Pub & Packagist">
 
   <meta name="twitter:card" content="summary_large_image">
   <meta name="twitter:domain" content="pkgdiff.dev">
   <meta name="twitter:url" content="https://pkgdiff.dev/">
   <meta name="twitter:site" content="@onlyflei">
   <meta name="twitter:creator" content="@onlyflei">
   <meta name="twitter:title"
-    content="pkgdiff — Compare NuGet, npm, PyPI & Pub Packages">
+    content="pkgdiff — Compare NuGet, npm, PyPI, Pub & Packagist Packages">
   <meta name="twitter:description"
-    content="Free tool to compare package versions across NuGet, npm, PyPI & Pub. Track breaking changes, view release notes, and analyze version differences between any two versions.">
+    content="Free tool to compare package versions across NuGet, npm, PyPI, Pub & Packagist. Track breaking changes, view release notes, and analyze version differences between any two versions.">
   <meta name="twitter:image" content="https://pkgdiff.dev/og-image/home.png">
-  <meta name="twitter:image:alt" content="pkgdiff — Compare Package Versions Across NuGet, npm, PyPI & Pub">
+  <meta name="twitter:image:alt" content="pkgdiff — Compare Package Versions Across NuGet, npm, PyPI, Pub & Packagist">
 
   <link rel="icon" type="image/png" href="/favicon/favicon-96x96.png" sizes="96x96" />
   <link rel="icon" type="image/svg+xml" href="/favicon/favicon.svg" />
@@ -76,7 +76,7 @@
     "name": "pkgdiff",
     "alternateName": "Package Diff",
     "url": "https://pkgdiff.dev",
-    "description": "Free tool to compare package versions across NuGet, npm, PyPI & Pub. Track breaking changes, view release notes, and analyze version differences between any two versions.",
+    "description": "Free tool to compare package versions across NuGet, npm, PyPI, Pub & Packagist. Track breaking changes, view release notes, and analyze version differences between any two versions.",
     "applicationCategory": "DeveloperApplication",
     "operatingSystem": "Web",
     "browserRequirements": "Requires JavaScript. Requires HTML5.",
@@ -91,6 +91,7 @@
       "Compare npm package versions",
       "Compare PyPI package versions",
       "Compare pub.dev package versions",
+      "Compare Packagist package versions",
       "View release notes and changelogs",
       "Track version history",
       "Analyze package differences"
@@ -126,7 +127,7 @@
       style="font-family: Inter, sans-serif; max-width: 720px; margin: 0 auto; padding: 40px 16px; font-size: 16px; line-height: 1.6; color: #111418;">
       <h1 style="font-size: 28px; font-weight: 700; margin-bottom: 16px;">pkgdiff — Compare Package Versions Online</h1>
       <p style="font-size: 18px; color: #617589; margin-bottom: 24px;">
-        Compare and analyze package versions across NuGet, npm, PyPI and Pub registries. Track breaking changes,
+        Compare and analyze package versions across NuGet, npm, PyPI, Pub and Packagist registries. Track breaking changes,
         view
         detailed release notes, and understand version differences with our free online diff tool. Perfect for
         developers upgrading dependencies and managing package updates.

src/frontend/ssr-smoke.test.mjs

@@ -121,9 +121,9 @@ test('the home page arrives rendered, with its meta and ready to be hydrated', a
   const { status, html } = await page('/');
 
   assert.equal(status, 200);
-  assert.match(html, /<h1[^>]*>\s*Compare package versions across NuGet, npm, PyPI &amp; Pub/);
+  assert.match(html, /<h1[^>]*>\s*Compare package versions across NuGet, npm, PyPI, Pub &amp; Packagist/);
   assert.match(html, /What you can do with pkgdiff/);
-  assert.match(html, /<title>pkgdiff — Compare NuGet, npm, PyPI &amp; Pub Packages<\/title>/);
+  assert.match(html, /<title>pkgdiff — Compare NuGet, npm, PyPI, Pub &amp; Packagist Packages<\/title>/);
   assert.equal(count(html, /<link rel="canonical"/g), 1);
   assert.match(html, /<link rel="canonical" href="https:\/\/pkgdiff\.dev\/"/);
   assert.match(html, /ng-server-context="ssr"/);