feat: add preview-major bump type for preview version releases

Adds a `preview-major` bump type that increments the major preview
number and resets the minor to 0 (e.g. 0.3.0-preview.1.0 -> 0.3.0-preview.2.0).

The existing `preview` bump type continues to increment the minor
preview number (e.g. 0.3.0-preview.1.0 -> 0.3.0-preview.1.1).

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

Author: tejaskash

.github/workflows/release.yml

@@ -9,6 +9,7 @@ on:
         type: choice
         options:
           - preview
+          - preview-major
           - patch
           - minor
           - major

scripts/bump-version.ts

@@ -7,7 +7,7 @@
  *   npx tsx scripts/bump-version.ts <bump_type> [options]
  *
  * Arguments:
- *   bump_type: major | minor | patch | prerelease | preview
+ *   bump_type: major | minor | patch | prerelease | preview | preview-major
  *
  * Options:
  *   --changelog <text>     Custom changelog entry
@@ -16,7 +16,8 @@
  *
  * Preview bumps (internal format):
  *   - 0.3.0 -> 0.3.0-preview.1.0
- *   - 0.3.0-preview.1.0 -> 0.3.0-preview.1.1
+ *   - 0.3.0-preview.1.0 -> 0.3.0-preview.1.1 (preview)
+ *   - 0.3.0-preview.1.0 -> 0.3.0-preview.2.0 (preview-major)
  */
 import { execSync } from 'child_process';
 import { existsSync, readFileSync, writeFileSync } from 'fs';
@@ -25,7 +26,7 @@ import { existsSync, readFileSync, writeFileSync } from 'fs';
 // Types
 // ===========================
 
-type BumpType = 'major' | 'minor' | 'patch' | 'prerelease' | 'preview';
+type BumpType = 'major' | 'minor' | 'patch' | 'prerelease' | 'preview' | 'preview-major';
 
 interface ParsedVersion {
   major: number;
@@ -175,6 +176,26 @@ function bumpVersion(current: string, bumpType: BumpType, prereleaseTag = 'beta'
         previewMinor: 0,
       });
 
+    case 'preview-major':
+      // Increment the major preview number and reset minor to 0
+      if (parsed.previewMajor !== undefined && parsed.previewMinor !== undefined) {
+        return formatVersion({
+          major: parsed.major,
+          minor: parsed.minor,
+          patch: parsed.patch,
+          previewMajor: parsed.previewMajor + 1,
+          previewMinor: 0,
+        });
+      }
+      // Otherwise, start at preview.1.0
+      return formatVersion({
+        major: parsed.major,
+        minor: parsed.minor,
+        patch: parsed.patch,
+        previewMajor: 1,
+        previewMinor: 0,
+      });
+
     default: {
       const exhaustiveCheck: never = bumpType;
       throw new Error(`Unknown bump type: ${exhaustiveCheck as string}`);
@@ -371,7 +392,7 @@ function parseArgs(): { bumpType: BumpType; changelog?: string; prereleaseTag: s
 Usage: npx tsx scripts/bump-version.ts <bump_type> [options]
 
 Arguments:
-  bump_type: major | minor | patch | prerelease | preview
+  bump_type: major | minor | patch | prerelease | preview | preview-major
 
 Options:
   --changelog <text>        Custom changelog entry
@@ -381,14 +402,15 @@ Options:
 
 Preview bumps:
   - 0.3.0 -> 0.3.0-preview.1.0
-  - 0.3.0-preview.1.0 -> 0.3.0-preview.1.1
+  - 0.3.0-preview.1.0 -> 0.3.0-preview.1.1  (preview)
+  - 0.3.0-preview.1.0 -> 0.3.0-preview.2.0  (preview-major)
 `);
     process.exit(0);
   }
 
   const bumpType = args[0] as BumpType;
-  if (!['major', 'minor', 'patch', 'prerelease', 'preview'].includes(bumpType)) {
-    console.error(`Error: Invalid bump type '${bumpType}'. Must be one of: major, minor, patch, prerelease, preview`);
+  if (!['major', 'minor', 'patch', 'prerelease', 'preview', 'preview-major'].includes(bumpType)) {
+    console.error(`Error: Invalid bump type '${bumpType}'. Must be one of: major, minor, patch, prerelease, preview, preview-major`);
     process.exit(1);
   }