feat: make AI release notes the default behavior

- AI-generated release notes are now enabled by default
- Add --no-ai-release-notes flag to disable AI notes
- Update all documentation and examples to reflect new default
- Works for both sync commands and release commands

Users now get AI-generated release notes automatically:
  gitsyncer sync repo myproject              # AI notes enabled
  gitsyncer sync repo myproject --no-ai-release-notes  # Disable AI
  gitsyncer release create                   # AI notes enabled
  gitsyncer release create --no-ai-notes     # Disable AI

🤖 Generated with [Claude Code](https://claude.ai/code)

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

4 files changed, 34 insertions, 19 deletions

diff --git a/CLAUDE.md b/CLAUDE.md
index ca43cde..c628c20 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -41,9 +41,11 @@ gitsyncer release check
 # Disable automatic release checking during sync operations
 gitsyncer sync all --no-releases
 
-# Automatically create releases without confirmation prompts
+# Automatically create releases without confirmation prompts (AI notes enabled by default)
 gitsyncer release create --auto
-gitsyncer release create --auto --ai-notes
+
+# Create releases without AI notes
+gitsyncer release create --auto --no-ai-notes
 ```
 
 Note: Release checking is enabled by default after sync operations. It will check for version tags (formats: vX.Y.Z, vX.Y, vX, X.Y.Z, X.Y, X) that don't have corresponding releases on GitHub/Codeberg and prompt for confirmation before creating them.
diff --git a/README.md b/README.md
index afaaeb9..c3a9ed2 100644
--- a/README.md
+++ b/README.md
@@ -96,6 +96,12 @@ gitsyncer sync repo myproject --backup
 
 # Preview what would be synced
 gitsyncer sync repo myproject --dry-run
+
+# Sync without AI-generated release notes
+gitsyncer sync repo myproject --no-ai-release-notes
+
+# Auto-create releases without prompts (AI notes enabled by default)
+gitsyncer sync repo myproject --auto-create-releases
 ```
 
 #### Sync all configured repositories
@@ -152,20 +158,20 @@ gitsyncer release check myproject
 
 #### Create releases
 ```bash
-# Create releases with confirmation prompts
+# Create releases with confirmation prompts (AI notes enabled by default)
 gitsyncer release create
 
 # Auto-create without prompts
 gitsyncer release create --auto
 
-# Create with AI-generated notes
-gitsyncer release create --ai-notes
+# Create without AI-generated notes
+gitsyncer release create --no-ai-notes
 
 # Update existing releases with AI notes
-gitsyncer release create --update-existing --ai-notes
+gitsyncer release create --update-existing
 
-# Create for specific repository
-gitsyncer release create myproject --ai-notes
+# Create for specific repository without AI
+gitsyncer release create myproject --no-ai-notes
 ```
 
 ### Project Showcase
diff --git a/internal/cmd/release.go b/internal/cmd/release.go
index e7ce80a..f05005a 100644
--- a/internal/cmd/release.go
+++ b/internal/cmd/release.go
@@ -9,7 +9,7 @@ import (
 
 var (
 	autoRelease    bool
-	aiNotes        bool
+	noAINotes      bool
 	updateExisting bool
 	templatePath   string
 )
@@ -57,25 +57,25 @@ var releaseCreateCmd = &cobra.Command{
 	Long: `Create releases for version tags that don't have them.
 If no repository is specified, processes all configured repositories.`,
 	Args: cobra.MaximumNArgs(1),
-	Example: `  # Create releases with confirmation prompts
+	Example: `  # Create releases (AI notes enabled by default)
   gitsyncer release create
   
   # Auto-create without prompts
   gitsyncer release create --auto
   
-  # Create with AI-generated notes
-  gitsyncer release create --ai-notes
+  # Create without AI-generated notes
+  gitsyncer release create --no-ai-notes
   
   # Update existing releases with AI notes
-  gitsyncer release create --update-existing --ai-notes
+  gitsyncer release create --update-existing
   
-  # Create for specific repository
-  gitsyncer release create myproject --ai-notes`,
+  # Create for specific repository without AI
+  gitsyncer release create myproject --no-ai-notes`,
 	Run: func(cmd *cobra.Command, args []string) {
 		flags := buildFlags()
 		flags.CheckReleases = true
 		flags.AutoCreateReleases = autoRelease
-		flags.AIReleaseNotes = aiNotes
+		flags.AIReleaseNotes = !noAINotes
 		flags.UpdateReleases = updateExisting
 		
 		if len(args) > 0 {
@@ -100,7 +100,7 @@ func init() {
 	
 	// Create-specific flags
 	releaseCreateCmd.Flags().BoolVar(&autoRelease, "auto", false, "skip confirmation prompts")
-	releaseCreateCmd.Flags().BoolVar(&aiNotes, "ai-notes", false, "generate release notes using Claude AI based on git diff")
+	releaseCreateCmd.Flags().BoolVar(&noAINotes, "no-ai-notes", false, "disable AI-generated release notes (AI notes are enabled by default)")
 	releaseCreateCmd.Flags().BoolVar(&updateExisting, "update-existing", false, "update existing releases with new AI-generated notes")
 	releaseCreateCmd.Flags().StringVar(&templatePath, "template", "", "custom template for release notes")
 }
\ No newline at end of file
diff --git a/internal/cmd/sync.go b/internal/cmd/sync.go
index ad67178..9efa432 100644
--- a/internal/cmd/sync.go
+++ b/internal/cmd/sync.go
@@ -13,6 +13,7 @@ var (
 	createRepos    bool
 	noReleases     bool
 	autoCreate     bool
+	noAIReleaseNotes bool
 )
 
 var syncCmd = &cobra.Command{
@@ -28,14 +29,17 @@ var syncRepoCmd = &cobra.Command{
 	Short: "Sync a specific repository",
 	Long:  `Synchronize a specific repository across all configured organizations.`,
 	Args:  cobra.ExactArgs(1),
-	Example: `  # Sync a single repository
+	Example: `  # Sync a single repository (AI release notes enabled by default)
   gitsyncer sync repo myproject
   
   # Sync with backup locations
   gitsyncer sync repo myproject --backup
   
   # Preview what would be synced
-  gitsyncer sync repo myproject --dry-run`,
+  gitsyncer sync repo myproject --dry-run
+  
+  # Sync without AI-generated release notes
+  gitsyncer sync repo myproject --no-ai-release-notes`,
 	Run: func(cmd *cobra.Command, args []string) {
 		flags := buildFlags()
 		flags.SyncRepo = args[0]
@@ -179,6 +183,8 @@ func init() {
 	syncCmd.PersistentFlags().BoolVar(&backup, "backup", false, "include backup locations")
 	syncCmd.PersistentFlags().BoolVar(&createRepos, "create-repos", false, "auto-create missing repositories")
 	syncCmd.PersistentFlags().BoolVar(&noReleases, "no-releases", false, "skip release checking after sync")
+	syncCmd.PersistentFlags().BoolVar(&autoCreate, "auto-create-releases", false, "automatically create releases without confirmation")
+	syncCmd.PersistentFlags().BoolVar(&noAIReleaseNotes, "no-ai-release-notes", false, "disable AI-generated release notes (AI notes are enabled by default)")
 }
 
 func buildFlags() *cli.Flags {
@@ -189,5 +195,6 @@ func buildFlags() *cli.Flags {
 		Backup:       backup,
 		NoCheckReleases: noReleases,
 		AutoCreateReleases: autoCreate,
+		AIReleaseNotes: !noAIReleaseNotes,
 	}
 }
\ No newline at end of file