Switches to native Go build info for versioning

Simplifies the version command and Makefile by removing manual ldflags injection. The application now relies entirely on Go's built-in VCS metadata embedding to extract version, commit, and date information, ensuring accurate reporting across all build methods.

Makefile

@@ -0,0 +1,27 @@
+.PHONY: build install test coverage clean
+
+# Build the binary (Go automatically embeds VCS info)
+build:
+	@echo "Building gitlocal..."
+	go build -o gitlocal .
+
+# Install to $GOPATH/bin
+install:
+	@echo "Installing gitlocal..."
+	go install .
+
+# Run tests
+test:
+	@echo "Running tests..."
+	go test -v ./...
+
+# Run tests with coverage
+coverage:
+	@echo "Running tests with coverage..."
+	go test -coverprofile=coverage.out ./...
+	go tool cover -func=coverage.out
+
+# Clean build artifacts
+clean:
+	@echo "Cleaning..."
+	rm -f gitlocal coverage.out

README.md

@@ -74,6 +74,19 @@ Converted Repositories (2):
     Branch: master
 ```
 
+### Show version information
+
+```bash
+gitlocal version
+```
+
+Example output:
+```
+gitlocal version v0.1.0
+  Commit: a1b2c3d
+  Built:  2026-04-11T14:30:00Z
+```
+
 ## Using git with .gitlocal
 
 Add this alias to your `.zshrc` or `.bashrc`:
@@ -122,12 +135,32 @@ cd gitlocal
 go mod download
 
 # Build the binary
+make build
+# or
 go build -o gitlocal
 
-# Or install directly to $GOPATH/bin
+# Install to $GOPATH/bin
+make install
+# or
 go install
 ```
 
+**Version Information:**
+Go automatically embeds version information from git when building. The `gitlocal version` command reads this embedded metadata to display:
+- Version (from git tag, e.g., `v0.1.0`)
+- Commit hash (short SHA)
+- Build timestamp
+
+This works automatically for:
+- `go install` (remote installation)
+- `go build` (local builds)
+- Pre-built binaries (when built from a git repo)
+
+Check the version after installing:
+```bash
+gitlocal version
+```
+
 ### Running Tests
 
 ```bash

cmd/version.go

@@ -0,0 +1,46 @@
+package cmd
+
+import (
+	"fmt"
+	"runtime/debug"
+
+	"github.com/spf13/cobra"
+)
+
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Print version information",
+	Long:  `Display the version, commit hash, and build date of gitlocal.`,
+	Run: func(cmd *cobra.Command, args []string) {
+		version := "dev"
+		commit := "unknown"
+		date := "unknown"
+
+		// Read version from build info (works for both 'go install' and 'go build')
+		if info, ok := debug.ReadBuildInfo(); ok {
+			version = info.Main.Version
+
+			// Extract commit and date from build settings
+			for _, setting := range info.Settings {
+				switch setting.Key {
+				case "vcs.revision":
+					if len(setting.Value) > 7 {
+						commit = setting.Value[:7]
+					} else {
+						commit = setting.Value
+					}
+				case "vcs.time":
+					date = setting.Value
+				}
+			}
+		}
+
+		fmt.Printf("gitlocal version %s\n", version)
+		fmt.Printf("  Commit: %s\n", commit)
+		fmt.Printf("  Built:  %s\n", date)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+}