feat: implement amp AI tool support and replace Taskfile with Magev0.10.0

- Add amp as default AI tool for release notes and showcase generation
- Fallback chain: amp → hexai → claude → aichat
- Replace Taskfile.yaml with magefile.go for build automation
- Update all documentation (README.md, AGENTS.md, doc/development.md)
- Update version to 0.10.0

Amp-Thread-ID: https://ampcode.com/threads/T-735ba1e2-0255-4b43-8ed1-6c0d2f78301b
Co-authored-by: Amp <amp@ampcode.com>

7 files changed, 107 insertions, 109 deletions

diff --git a/internal/cmd/list.go b/internal/cmd/list.go
index 90d0eb8..31a39f5 100644
--- a/internal/cmd/list.go
+++ b/internal/cmd/list.go
@@ -3,8 +3,8 @@ package cmd
 import (
 	"os"
 
-	"github.com/spf13/cobra"
 	"codeberg.org/snonux/gitsyncer/internal/cli"
+	"github.com/spf13/cobra"
 )
 
 var listCmd = &cobra.Command{
@@ -37,4 +37,4 @@ func init() {
 	rootCmd.AddCommand(listCmd)
 	listCmd.AddCommand(listOrgsCmd)
 	listCmd.AddCommand(listReposCmd)
-}
\ No newline at end of file
+}
diff --git a/internal/cmd/manage.go b/internal/cmd/manage.go
index 437bd96..6e2ffee 100644
--- a/internal/cmd/manage.go
+++ b/internal/cmd/manage.go
@@ -5,9 +5,9 @@ import (
 	"os"
 	"path/filepath"
 
-	"github.com/spf13/cobra"
 	"codeberg.org/snonux/gitsyncer/internal/cli"
 	"codeberg.org/snonux/gitsyncer/internal/state"
+	"github.com/spf13/cobra"
 )
 
 var force bool
@@ -43,7 +43,7 @@ var cleanCmd = &cobra.Command{
 		flags := buildFlags()
 		flags.Clean = true
 		flags.Force = force
-		
+
 		// TODO: Implement clean handler
 		fmt.Println("Clean command not yet implemented")
 		os.Exit(1)
@@ -64,7 +64,7 @@ This is designed for automated weekly synchronization from cron jobs or shell sc
 		flags := buildFlags()
 		flags.BatchRun = true
 		flags.Force = force
-		
+
 		// Check state unless forced
 		if !force {
 			stateManager := state.NewManager(workDir)
@@ -72,23 +72,23 @@ This is designed for automated weekly synchronization from cron jobs or shell sc
 			if err != nil {
 				fmt.Fprintf(os.Stderr, "Warning: Failed to load state: %v\n", err)
 			}
-			
+
 			if s.HasRunWithinWeek() {
-				fmt.Printf("Batch run was already executed within the past week (last run: %s).\n", 
+				fmt.Printf("Batch run was already executed within the past week (last run: %s).\n",
 					s.LastBatchRun.Format("2006-01-02 15:04:05"))
 				stateFile := filepath.Join(workDir, ".gitsyncer-state.json")
 				fmt.Printf("State file location: %s\n", stateFile)
 				fmt.Println("Skipping batch run. Use --force to override.")
 				os.Exit(0)
 			}
-			
+
 			// Store state manager for later
 			flags.BatchRunStateManager = stateManager
 			flags.BatchRunState = s
 		}
-		
+
 		fmt.Println("Starting weekly batch run (full sync + showcase)...")
-		
+
 		// Enable full sync and showcase
 		flags.FullSync = true
 		flags.Showcase = true
@@ -96,24 +96,24 @@ This is designed for automated weekly synchronization from cron jobs or shell sc
 		flags.SyncGitHubPublic = true
 		flags.CreateGitHubRepos = true
 		flags.CreateCodebergRepos = true
-		
+
 		// Run sync operations
 		exitCode := cli.HandleSyncCodebergPublic(cfg, flags)
 		if exitCode != 0 {
 			os.Exit(exitCode)
 		}
-		
+
 		exitCode = cli.HandleSyncGitHubPublic(cfg, flags)
 		if exitCode != 0 {
 			os.Exit(exitCode)
 		}
-		
+
 		// Run showcase
 		showcaseCode := cli.HandleShowcase(cfg, flags)
 		if showcaseCode != 0 {
 			os.Exit(showcaseCode)
 		}
-		
+
 		// Save batch run state
 		if flags.BatchRunStateManager != nil && flags.BatchRunState != nil {
 			flags.BatchRunState.UpdateBatchRunTime()
@@ -125,7 +125,7 @@ This is designed for automated weekly synchronization from cron jobs or shell sc
 				fmt.Println("Next batch run allowed after one week.")
 			}
 		}
-		
+
 		os.Exit(0)
 	},
 }
@@ -135,8 +135,8 @@ func init() {
 	manageCmd.AddCommand(deleteRepoCmd)
 	manageCmd.AddCommand(cleanCmd)
 	manageCmd.AddCommand(batchRunCmd)
-	
+
 	// Manage-specific flags
 	cleanCmd.Flags().BoolVarP(&force, "force", "f", false, "force operation without confirmation")
 	batchRunCmd.Flags().BoolVarP(&force, "force", "f", false, "force run even if already run this week")
-}
\ No newline at end of file
+}
diff --git a/internal/cmd/release.go b/internal/cmd/release.go
index 9f4e713..656f4a6 100644
--- a/internal/cmd/release.go
+++ b/internal/cmd/release.go
@@ -3,8 +3,8 @@ package cmd
 import (
 	"os"
 
-	"github.com/spf13/cobra"
 	"codeberg.org/snonux/gitsyncer/internal/cli"
+	"github.com/spf13/cobra"
 )
 
 var (
@@ -16,11 +16,11 @@ var (
 )
 
 var releaseCmd = &cobra.Command{
-    Use:   "release",
-    Short: "Manage releases across platforms",
-    Long: `Check for version tags without releases and create them across 
-GitHub and Codeberg. Supports AI-generated release notes via hexai (stdin pipeline),
-with fallback to Claude or aichat.`,
+	Use:   "release",
+	Short: "Manage releases across platforms",
+	Long: `Check for version tags without releases and create them across 
+GitHub and Codeberg. Supports AI-generated release notes via amp (stdin pipeline),
+with fallback to hexai, Claude, or aichat.`,
 }
 
 var releaseCheckCmd = &cobra.Command{
@@ -40,7 +40,7 @@ If no repository is specified, checks all configured repositories.`,
 	Run: func(cmd *cobra.Command, args []string) {
 		flags := buildFlags()
 		flags.CheckReleases = true
-		
+
 		if len(args) > 0 {
 			// Check specific repo
 			exitCode := cli.HandleCheckReleasesForRepo(cfg, flags, args[0])
@@ -74,8 +74,8 @@ If no repository is specified, processes all configured repositories.`,
   # Create for specific repository without AI
   gitsyncer release create myproject --no-ai-notes
   
-  # Use aichat instead of claude for AI release notes
-  gitsyncer release create --ai-tool aichat`,
+  # Use amp for AI release notes
+gitsyncer release create --ai-tool amp`,
 	Run: func(cmd *cobra.Command, args []string) {
 		flags := buildFlags()
 		flags.CheckReleases = true
@@ -83,7 +83,7 @@ If no repository is specified, processes all configured repositories.`,
 		flags.AIReleaseNotes = !noAINotes
 		flags.UpdateReleases = updateExisting
 		flags.AITool = aiTool
-		
+
 		if len(args) > 0 {
 			// Create releases for specific repo
 			exitCode := cli.HandleCheckReleasesForRepo(cfg, flags, args[0])
@@ -100,14 +100,14 @@ func init() {
 	rootCmd.AddCommand(releaseCmd)
 	releaseCmd.AddCommand(releaseCheckCmd)
 	releaseCmd.AddCommand(releaseCreateCmd)
-	
+
 	// Release flags
 	releaseCmd.PersistentFlags().BoolVar(&dryRun, "dry-run", false, "preview what releases would be created")
-	
+
 	// Create-specific flags
 	releaseCreateCmd.Flags().BoolVar(&autoRelease, "auto", false, "skip confirmation prompts")
 	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")
-    releaseCreateCmd.Flags().StringVar(&aiTool, "ai-tool", "claude", "AI tool to use for release notes (claude or aichat; hexai is tried first if available)")
+	releaseCreateCmd.Flags().StringVar(&aiTool, "ai-tool", "amp", "AI tool to use for release notes (amp, claude, aichat, or hexai; amp is tried first if available)")
 }
diff --git a/internal/cmd/root.go b/internal/cmd/root.go
index bf4f64a..caf89f1 100644
--- a/internal/cmd/root.go
+++ b/internal/cmd/root.go
@@ -5,15 +5,15 @@ import (
 	"os"
 	"path/filepath"
 
-	"github.com/spf13/cobra"
 	"codeberg.org/snonux/gitsyncer/internal/config"
 	"codeberg.org/snonux/gitsyncer/internal/version"
+	"github.com/spf13/cobra"
 )
 
 var (
-	cfgFile  string
-	workDir  string
-	cfg      *config.Config
+	cfgFile string
+	workDir string
+	cfg     *config.Config
 	rootCmd = &cobra.Command{
 		Use:   "gitsyncer",
 		Short: "Synchronize git repositories across multiple platforms",
@@ -25,7 +25,7 @@ keeps all branches in sync across different git hosting platforms.`,
 			if cmd.Use == "version" {
 				return
 			}
-			
+
 			// Load configuration
 			var err error
 			cfg, err = config.Load(cfgFile)
@@ -35,7 +35,7 @@ keeps all branches in sync across different git hosting platforms.`,
 				fmt.Fprintf(os.Stderr, "See 'gitsyncer help' for more information.\n")
 				os.Exit(1)
 			}
-			
+
 			// Use config WorkDir if no flag was explicitly provided
 			if !cmd.Flags().Changed("work-dir") && cfg.WorkDir != "" {
 				workDir = cfg.WorkDir
@@ -54,16 +54,16 @@ func Execute() {
 func init() {
 	// Global flags
 	rootCmd.PersistentFlags().StringVarP(&cfgFile, "config", "c", "", "configuration file (default: ~/.config/gitsyncer/config.json)")
-	
+
 	// Set default work directory
 	home, err := os.UserHomeDir()
 	defaultWorkDir := ".gitsyncer-work"
 	if err == nil {
 		defaultWorkDir = filepath.Join(home, "git", "gitsyncer-workdir")
 	}
-	
+
 	rootCmd.PersistentFlags().StringVarP(&workDir, "work-dir", "w", defaultWorkDir, "working directory for operations")
-	
+
 	// Version command
 	rootCmd.AddCommand(&cobra.Command{
 		Use:   "version",
@@ -72,6 +72,5 @@ func init() {
 			fmt.Println(version.GetVersion())
 		},
 	})
-	
-}
 
+}
diff --git a/internal/cmd/showcase.go b/internal/cmd/showcase.go
index 6f9f984..a590756 100644
--- a/internal/cmd/showcase.go
+++ b/internal/cmd/showcase.go
@@ -4,26 +4,25 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/spf13/cobra"
 	"codeberg.org/snonux/gitsyncer/internal/cli"
+	"github.com/spf13/cobra"
 )
 
 var (
-    forceRegenerate bool
-    outputPath      string
-    outputFormat    string
-    excludePattern  string
-    showcaseAITool  string
-    showcaseRepo    string
+	forceRegenerate bool
+	outputPath      string
+	outputFormat    string
+	excludePattern  string
+	showcaseAITool  string
+	showcaseRepo    string
 )
 
 var showcaseCmd = &cobra.Command{
 	Use:   "showcase",
 	Short: "Generate AI-powered project showcase",
-    Long: `Generate a comprehensive showcase of all your projects using AI.
+	Long: `Generate a comprehensive showcase of all your projects using AI.
 This feature creates a formatted document with project summaries, statistics,
-and code snippets. By default uses Claude, but will try hexai first if available,
-and can also use aichat.`,
+and code snippets. By default uses amp, with fallback to hexai, claude, and aichat.`,
 	Example: `  # Generate showcase with cached summaries
   gitsyncer showcase
   
@@ -40,30 +39,30 @@ and can also use aichat.`,
   gitsyncer showcase --exclude "test-.*"
   
   # Use a specific AI tool
-  gitsyncer showcase --ai-tool hexai`,
-    Run: func(cmd *cobra.Command, args []string) {
-        flags := buildFlags()
-        flags.Showcase = true
-        flags.Force = forceRegenerate
-        flags.AITool = showcaseAITool
-        if showcaseRepo != "" {
-            flags.SyncRepo = showcaseRepo
-        }
-        
-        fmt.Println("Running showcase generation for all repositories...")
-        exitCode := cli.HandleShowcaseOnly(cfg, flags)
-        os.Exit(exitCode)
-    },
+  gitsyncer showcase --ai-tool amp`,
+	Run: func(cmd *cobra.Command, args []string) {
+		flags := buildFlags()
+		flags.Showcase = true
+		flags.Force = forceRegenerate
+		flags.AITool = showcaseAITool
+		if showcaseRepo != "" {
+			flags.SyncRepo = showcaseRepo
+		}
+
+		fmt.Println("Running showcase generation for all repositories...")
+		exitCode := cli.HandleShowcaseOnly(cfg, flags)
+		os.Exit(exitCode)
+	},
 }
 
 func init() {
-    rootCmd.AddCommand(showcaseCmd)
-    
-    // Showcase flags
-    showcaseCmd.Flags().BoolVarP(&forceRegenerate, "force", "f", false, "force regeneration of cached summaries")
-    showcaseCmd.Flags().StringVarP(&outputPath, "output", "o", "", "custom output path (default: ~/git/foo.zone-content/gemtext/about/showcase.gmi.tpl)")
-    showcaseCmd.Flags().StringVar(&outputFormat, "format", "gemtext", "output format: gemtext, markdown, html")
-    showcaseCmd.Flags().StringVar(&excludePattern, "exclude", "", "exclude repos matching pattern")
-    showcaseCmd.Flags().StringVar(&showcaseAITool, "ai-tool", "claude", "AI tool for summaries: hexai, claude, claude-code, or aichat (default tries hexai→claude→aichat)")
-    showcaseCmd.Flags().StringVar(&showcaseRepo, "repo", "", "only generate showcase for a single repository")
+	rootCmd.AddCommand(showcaseCmd)
+
+	// Showcase flags
+	showcaseCmd.Flags().BoolVarP(&forceRegenerate, "force", "f", false, "force regeneration of cached summaries")
+	showcaseCmd.Flags().StringVarP(&outputPath, "output", "o", "", "custom output path (default: ~/git/foo.zone-content/gemtext/about/showcase.gmi.tpl)")
+	showcaseCmd.Flags().StringVar(&outputFormat, "format", "gemtext", "output format: gemtext, markdown, html")
+	showcaseCmd.Flags().StringVar(&excludePattern, "exclude", "", "exclude repos matching pattern")
+	showcaseCmd.Flags().StringVar(&showcaseAITool, "ai-tool", "amp", "AI tool for summaries: amp, hexai, claude, claude-code, or aichat (default tries amp→hexai→claude→aichat)")
+	showcaseCmd.Flags().StringVar(&showcaseRepo, "repo", "", "only generate showcase for a single repository")
 }
diff --git a/internal/cmd/sync.go b/internal/cmd/sync.go
index 86505d5..a28f50d 100644
--- a/internal/cmd/sync.go
+++ b/internal/cmd/sync.go
@@ -3,18 +3,18 @@ package cmd
 import (
 	"os"
 
-	"github.com/spf13/cobra"
 	"codeberg.org/snonux/gitsyncer/internal/cli"
+	"github.com/spf13/cobra"
 )
 
 var (
-	dryRun         bool
-	backup         bool
-	createRepos    bool
-	noReleases     bool
-	autoCreate     bool
+	dryRun           bool
+	backup           bool
+	createRepos      bool
+	noReleases       bool
+	autoCreate       bool
 	noAIReleaseNotes bool
-	syncAITool     string
+	syncAITool       string
 )
 
 var syncCmd = &cobra.Command{
@@ -42,12 +42,12 @@ var syncRepoCmd = &cobra.Command{
   # Sync without AI-generated release notes
   gitsyncer sync repo myproject --no-ai-release-notes
   
-  # Auto-create releases using aichat for AI notes
-  gitsyncer sync repo myproject --auto-create-releases --ai-tool aichat`,
+  # Auto-create releases using amp for AI notes
+gitsyncer sync repo myproject --auto-create-releases --ai-tool amp`,
 	Run: func(cmd *cobra.Command, args []string) {
 		flags := buildFlags()
 		flags.SyncRepo = args[0]
-		
+
 		exitCode := cli.HandleSync(cfg, flags)
 		if exitCode == 0 && !noReleases {
 			cli.HandleCheckReleasesForRepo(cfg, flags, args[0])
@@ -71,7 +71,7 @@ var syncAllCmd = &cobra.Command{
 	Run: func(cmd *cobra.Command, args []string) {
 		flags := buildFlags()
 		flags.SyncAll = true
-		
+
 		exitCode := cli.HandleSyncAll(cfg, flags)
 		if exitCode == 0 && !noReleases {
 			cli.HandleCheckReleases(cfg, flags)
@@ -95,11 +95,11 @@ var syncCodebergToGitHubCmd = &cobra.Command{
 	Run: func(cmd *cobra.Command, args []string) {
 		flags := buildFlags()
 		flags.SyncCodebergPublic = true
-		
+
 		if createRepos || autoCreate {
 			flags.CreateGitHubRepos = true
 		}
-		
+
 		exitCode := cli.HandleSyncCodebergPublic(cfg, flags)
 		if exitCode == 0 && !noReleases {
 			cli.HandleCheckReleases(cfg, flags)
@@ -123,11 +123,11 @@ var syncGitHubToCodebergCmd = &cobra.Command{
 	Run: func(cmd *cobra.Command, args []string) {
 		flags := buildFlags()
 		flags.SyncGitHubPublic = true
-		
+
 		if createRepos || autoCreate {
 			flags.CreateCodebergRepos = true
 		}
-		
+
 		exitCode := cli.HandleSyncGitHubPublic(cfg, flags)
 		if exitCode == 0 && !noReleases {
 			cli.HandleCheckReleases(cfg, flags)
@@ -156,13 +156,13 @@ repositories between GitHub and Codeberg. This is equivalent to the old --full f
 		flags.SyncGitHubPublic = true
 		flags.CreateGitHubRepos = true
 		flags.CreateCodebergRepos = true
-		
+
 		// First sync Codeberg to GitHub
 		exitCode := cli.HandleSyncCodebergPublic(cfg, flags)
 		if exitCode != 0 {
 			os.Exit(exitCode)
 		}
-		
+
 		// Then sync GitHub to Codeberg
 		exitCode = cli.HandleSyncGitHubPublic(cfg, flags)
 		if exitCode == 0 && !noReleases {
@@ -174,14 +174,14 @@ repositories between GitHub and Codeberg. This is equivalent to the old --full f
 
 func init() {
 	rootCmd.AddCommand(syncCmd)
-	
+
 	// Add subcommands
 	syncCmd.AddCommand(syncRepoCmd)
 	syncCmd.AddCommand(syncAllCmd)
 	syncCmd.AddCommand(syncCodebergToGitHubCmd)
 	syncCmd.AddCommand(syncGitHubToCodebergCmd)
 	syncCmd.AddCommand(syncBidirectionalCmd)
-	
+
 	// Sync flags (available for all sync subcommands)
 	syncCmd.PersistentFlags().BoolVar(&dryRun, "dry-run", false, "preview what would be synced")
 	syncCmd.PersistentFlags().BoolVar(&backup, "backup", false, "include backup locations")
@@ -189,20 +189,20 @@ func init() {
 	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)")
-    syncCmd.PersistentFlags().StringVar(&syncAITool, "ai-tool", "claude", "AI tool to use for release notes when auto-creating (claude or aichat; hexai is tried first if available)")
+	syncCmd.PersistentFlags().StringVar(&syncAITool, "ai-tool", "amp", "AI tool to use for release notes when auto-creating (amp, claude, aichat, or hexai; amp is tried first if available)")
 }
 
 func buildFlags() *cli.Flags {
 	return &cli.Flags{
-		ConfigPath:   cfgFile,
-		WorkDir:      workDir,
-		DryRun:       dryRun,
-		Backup:       backup,
-		NoCheckReleases: noReleases,
-		AutoCreateReleases: autoCreate,
-		AIReleaseNotes: !noAIReleaseNotes,
-		AITool:       syncAITool,
-		CreateGitHubRepos: createRepos,
+		ConfigPath:          cfgFile,
+		WorkDir:             workDir,
+		DryRun:              dryRun,
+		Backup:              backup,
+		NoCheckReleases:     noReleases,
+		AutoCreateReleases:  autoCreate,
+		AIReleaseNotes:      !noAIReleaseNotes,
+		AITool:              syncAITool,
+		CreateGitHubRepos:   createRepos,
 		CreateCodebergRepos: createRepos,
 	}
 }
diff --git a/internal/cmd/test.go b/internal/cmd/test.go
index 2c50112..ebee3db 100644
--- a/internal/cmd/test.go
+++ b/internal/cmd/test.go
@@ -4,9 +4,9 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/spf13/cobra"
 	"codeberg.org/snonux/gitsyncer/internal/cli"
 	"codeberg.org/snonux/gitsyncer/internal/config"
+	"github.com/spf13/cobra"
 )
 
 var testCmd = &cobra.Command{
@@ -52,11 +52,11 @@ var testConfigCmd = &cobra.Command{
 			fmt.Fprintf(os.Stderr, "Configuration validation failed: %v\n", err)
 			os.Exit(1)
 		}
-		
+
 		fmt.Println("Configuration validation successful!")
 		fmt.Printf("  Organizations: %d\n", len(cfg.Organizations))
 		fmt.Printf("  Repositories: %d\n", len(cfg.Repositories))
-		
+
 		// Check for common issues
 		hasGitHub := false
 		hasCodeberg := false
@@ -74,11 +74,11 @@ var testConfigCmd = &cobra.Command{
 				}
 			}
 		}
-		
+
 		if !hasGitHub && !hasCodeberg {
 			fmt.Println("  ⚠️  Warning: No GitHub or Codeberg organizations configured")
 		}
-		
+
 		os.Exit(0)
 	},
 }
@@ -88,4 +88,4 @@ func init() {
 	testCmd.AddCommand(testGitHubCmd)
 	testCmd.AddCommand(testCodebergCmd)
 	testCmd.AddCommand(testConfigCmd)
-}
\ No newline at end of file
+}