diff --git a/layouts/_partials/init/detection-version.html b/layouts/_partials/init/detection-version.html
index cfcbb58d..a6c45165 100644
--- a/layouts/_partials/init/detection-version.html
+++ b/layouts/_partials/init/detection-version.html
@@ -33,6 +33,10 @@
   {{- if (gt $latest $version) | and $devOpts.c4u -}}
     {{- warnf "FixIt %v (⬆️ %v)\n%v`git submodule update --remote --merge`\n\n" $version $latest (T "init.quicklyUpgrade") -}}
   {{- end -}}
+  {{- /* [todo] remove this temporary warning after v1.0.0 release */ -}}
+  {{- if hasPrefix $version "v1." -}}
+    {{- warnidf "warning-v1-dev" "FixIt %v\n⚠️ You are using a v1.0.0 development version, which may contain breaking changes.\nIt is recommended to use the latest stable release v0.4.5: https://github.com/hugo-fixit/FixIt/releases/tag/v0.4.5\n" $version -}}
+  {{- end -}}
 {{- end -}}
 
 {{- hugo.Store.Set "latest" $latest -}}
diff --git a/layouts/_partials/init/index.html b/layouts/_partials/init/index.html
index 8faec88f..fe323b18 100644
--- a/layouts/_partials/init/index.html
+++ b/layouts/_partials/init/index.html
@@ -1,4 +1,4 @@
-{{- hugo.Store.Set "version" "v0.4.6-20260517062719-ed8ec5c2" -}}
+{{- hugo.Store.Set "version" "v1.0.0-20260528064828-5b43c2b6" -}}
 {{- .Store.Set "this" dict -}}
 
 {{- partial "init/detection-env.html" . -}}
diff --git a/package.json b/package.json
index 75051868..d9f81604 100644
--- a/package.json
+++ b/package.json
@@ -2,6 +2,7 @@
   "name": "@hugo-fixit/core",
   "type": "module",
   "version": "0.4.5",
+  "nextVersion": "1.0.0",
   "private": true,
   "packageManager": "pnpm@11.1.0",
   "description": "Hugo FixIt core theme component source files",
diff --git a/packages/integration/tsconfig.json b/packages/integration/tsconfig.json
index 5823ed54..e8d13465 100644
--- a/packages/integration/tsconfig.json
+++ b/packages/integration/tsconfig.json
@@ -1,11 +1,9 @@
 {
   "compilerOptions": {
     "target": "ESNext",
-    "jsx": "preserve",
-    "lib": ["DOM", "ESNext"],
-    "baseUrl": ".",
-    "module": "ESNext",
-    "moduleResolution": "node",
+    "lib": ["ESNext"],
+    "module": "nodenext",
+    "moduleResolution": "nodenext",
     "resolveJsonModule": true,
     "types": ["node"],
     "strict": true,
diff --git a/packages/shared/tsconfig.json b/packages/shared/tsconfig.json
index 5823ed54..e8d13465 100644
--- a/packages/shared/tsconfig.json
+++ b/packages/shared/tsconfig.json
@@ -1,11 +1,9 @@
 {
   "compilerOptions": {
     "target": "ESNext",
-    "jsx": "preserve",
-    "lib": ["DOM", "ESNext"],
-    "baseUrl": ".",
-    "module": "ESNext",
-    "moduleResolution": "node",
+    "lib": ["ESNext"],
+    "module": "nodenext",
+    "moduleResolution": "nodenext",
     "resolveJsonModule": true,
     "types": ["node"],
     "strict": true,
diff --git a/packages/versioning/src/update-version.ts b/packages/versioning/src/update-version.ts
index 71ec0fa6..d1973fe7 100644
--- a/packages/versioning/src/update-version.ts
+++ b/packages/versioning/src/update-version.ts
@@ -55,8 +55,11 @@ export function updateVersion(type: 'dev' | 'prod') {
   const shortHash: string = execSync('git rev-parse --short HEAD').toString().trim()
   // Build the development version v{major}.{minor}.{patch+1}-{timestamp}-{shortHash}
   // e.g. v0.3.21-20250702061540-abcdefg
+  // If `nextVersion` is set in package.json, use it as the base instead of auto-incrementing patch.
   const timestamp: string = new Date().toISOString().replace(ISO_TIMESTAMP_CLEAN_RE, '').slice(0, -4)
-  const devVersion: string = `${version.replace(VERSION_PATCH_RE, (_versionPatchMatch, part) => (Number.parseInt(part, 10) + 1).toString())}-${timestamp}-${shortHash}`
+  const nextVersion: string | undefined = packageJson.nextVersion
+  const devBaseVersion: string = nextVersion ?? version.replace(VERSION_PATCH_RE, (_versionPatchMatch, part) => (Number.parseInt(part, 10) + 1).toString())
+  const devVersion: string = `${devBaseVersion}-${timestamp}-${shortHash}`
   const initHtml: string = fs.readFileSync(initHtmlPath, 'utf8')
   const latestVersion: string = type === 'prod' ? version : devVersion
   const versionMatch = initHtml.match(VERSION_RE)
@@ -74,6 +77,12 @@ export function updateVersion(type: 'dev' | 'prod') {
 
   // Update the version number in layouts/_partials/init/index.html
   fs.writeFileSync(initHtmlPath, newInitHtml)
+  // In prod mode, remove the `nextVersion` field from package.json if present
+  if (type === 'prod' && nextVersion) {
+    delete packageJson.nextVersion
+    fs.writeFileSync(packageJsonPath, `${JSON.stringify(packageJson, null, 2)}\n`)
+    console.log('Removed nextVersion field from package.json.')
+  }
   // Add the updated files to the git stage
   const toStageFiles: string[] = [
     'layouts/_partials/init/index.html',
diff --git a/packages/versioning/tsconfig.json b/packages/versioning/tsconfig.json
index 5823ed54..e8d13465 100644
--- a/packages/versioning/tsconfig.json
+++ b/packages/versioning/tsconfig.json
@@ -1,11 +1,9 @@
 {
   "compilerOptions": {
     "target": "ESNext",
-    "jsx": "preserve",
-    "lib": ["DOM", "ESNext"],
-    "baseUrl": ".",
-    "module": "ESNext",
-    "moduleResolution": "node",
+    "lib": ["ESNext"],
+    "module": "nodenext",
+    "moduleResolution": "nodenext",
     "resolveJsonModule": true,
     "types": ["node"],
     "strict": true,