fix: guard against invalid semver, extra repo path segments, and lost error cause

- In the custom version prompt validator, check isValidSemver(currentVersion)
  before calling semver.gt; an invalid current version (e.g. workspace:*)
  would cause semver.gt to throw a TypeError instead of returning a user-facing
  validation message
- In normalizeReleaseScriptsOptions, require exactly two non-empty segments when
  splitting the repo string; values like "owner/repo/extra" were silently
  truncated to "owner/repo" instead of failing fast with a clear error
- In packages.list/get, pass the original WorkspaceError as the cause when
  wrapping in ReleaseError so structured context is preserved for downstream
  error formatting

Author: luxass

src/core/prompts.ts

@@ -124,6 +124,9 @@ export async function selectVersionPrompt(
         if (!isValidSemver(custom)) {
           return "That's not a valid version number";
         }
+        if (!isValidSemver(currentVersion)) {
+          return `Current version "${currentVersion}" is not valid semver — cannot compare`;
+        }
         if (!semver.gt(custom, currentVersion)) {
           return `Version must be greater than the current version (${currentVersion})`;
         }

src/index.ts

@@ -68,15 +68,15 @@ export async function createReleaseScripts(options: ReleaseScriptsOptionsInput):
       async list(): Promise<WorkspacePackage[]> {
         return withErrorBoundary(async () => {
           const result = await discoverWorkspacePackages(normalizedOptions.workspaceRoot, normalizedOptions);
-          if (!result.ok) throw new ReleaseError(result.error.message);
+          if (!result.ok) throw new ReleaseError(result.error.message, undefined, result.error);
           return result.value;
         });
       },
 
       async get(packageName: string): Promise<WorkspacePackage | undefined> {
         return withErrorBoundary(async () => {
           const result = await discoverWorkspacePackages(normalizedOptions.workspaceRoot, normalizedOptions);
-          if (!result.ok) throw new ReleaseError(result.error.message);
+          if (!result.ok) throw new ReleaseError(result.error.message, undefined, result.error);
           return result.value.find((p) => p.name === packageName);
         });
       },

src/options.ts

@@ -147,11 +147,13 @@ export function normalizeReleaseScriptsOptions(options: ReleaseScriptsOptionsInp
     throw new ReleaseError("Repository (repo) is required. Specify in 'owner/repo' format (e.g., 'octocat/hello-world').");
   }
 
-  const [owner, repo] = fullRepo.split("/");
-  if (!owner || !repo) {
+  const repoParts = fullRepo.trim().split("/");
+  if (repoParts.length !== 2 || !repoParts[0]!.trim() || !repoParts[1]!.trim()) {
     throw new ReleaseError(`Invalid repo format: "${fullRepo}". Expected format: "owner/repo" (e.g., "octocat/hello-world").`);
   }
 
+  const [owner, repo] = repoParts.map((p) => p.trim()) as [string, string];
+
   const normalizedPackages = typeof packages === "object" && !Array.isArray(packages)
     ? {
         exclude: packages.exclude ?? [],