Reorganize code into individual tool files

tool_analyze_coupling.go

@@ -0,0 +1,39 @@
+package main
+
+// Coupling analysis types
+type CouplingInfo struct {
+	Package        string            `json:"package"`
+	Afferent       int               `json:"afferent"`
+	Efferent       int               `json:"efferent"`
+	Instability    float64           `json:"instability"`
+	Dependencies   []string          `json:"dependencies"`
+	Dependents     []string          `json:"dependents"`
+	Suggestions    []string          `json:"suggestions,omitempty"`
+}
+
+func analyzeCoupling(dir string) ([]CouplingInfo, error) {
+	var coupling []CouplingInfo
+
+	// This is a simplified implementation
+	packages, err := listPackages(dir, false)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, pkg := range packages {
+		info := CouplingInfo{
+			Package:      pkg.Name,
+			Dependencies: pkg.Imports,
+			Efferent:     len(pkg.Imports),
+		}
+
+		// Calculate instability (Ce / (Ca + Ce))
+		if info.Afferent+info.Efferent > 0 {
+			info.Instability = float64(info.Efferent) / float64(info.Afferent+info.Efferent)
+		}
+
+		coupling = append(coupling, info)
+	}
+
+	return coupling, nil
+}