Filter out Go pseudo-versions from update suggestions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: silverwind

index.test.ts

@@ -181,6 +181,7 @@ beforeAll(async () => {
     {path: "/github.com/google/go-github/v70/@latest", response: JSON.stringify({Version: "v70.0.0", Time: "2024-11-29T00:00:00Z"})},
     {path: "/github.com/example/testpkg/@latest", response: JSON.stringify({Version: "v1.0.0", Time: "2024-01-01T00:00:00Z"})},
     {path: "/github.com/example/testpkg/v2/@latest", response: JSON.stringify({Version: "v2.0.0", Time: "2025-01-01T00:00:00Z"})},
+    {path: "/github.com/google/uuid/v2/@latest", response: JSON.stringify({Version: "v2.0.0-20260217135312-8c5a7de9ffa1", Time: "2026-02-17T13:53:12Z"})},
   ];
   for (let v = 71; v <= 82; v++) {
     goProxyRoutes.push({

index.ts

@@ -533,6 +533,11 @@ function buildGoModulePath(name: string, major: number): string {
   return `${name.replace(/\/v\d+$/, "")}/v${major}`;
 }
 
+// TODO: maybe include pseudo-versions with --prerelease
+function isGoPseudoVersion(version: string): boolean {
+  return /\d{14}-[0-9a-f]{12}$/.test(version);
+}
+
 function parseGoMod(content: string): Record<string, string> {
   const deps: Record<string, string> = {};
   const lines = content.split(/\r?\n/);
@@ -1114,7 +1119,7 @@ function findNewVersion(data: any, {mode, range, useGreatest, useRel, usePre, se
 
     // Check cross-major upgrade
     const crossVersion = coerceToVersion(data.new);
-    if (crossVersion) {
+    if (crossVersion && !isGoPseudoVersion(data.new)) {
       const d = diff(oldVersion, crossVersion);
       if (d && semvers.has(d)) {
         return data.new;
@@ -1123,7 +1128,7 @@ function findNewVersion(data: any, {mode, range, useGreatest, useRel, usePre, se
 
     // Fall back to same-major upgrade
     const sameVersion = coerceToVersion(data.sameMajorNew);
-    if (sameVersion) {
+    if (sameVersion && !isGoPseudoVersion(data.sameMajorNew)) {
       const d = diff(oldVersion, sameVersion);
       if (d && semvers.has(d)) {
         data.Time = data.sameMajorTime;