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>

1 files changed, 32 insertions, 33 deletions

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")
 }