diff --git a/pkg/tools/risk.go b/pkg/tools/risk.go
index 3f86c67..4ceee87 100644
--- a/pkg/tools/risk.go
+++ b/pkg/tools/risk.go
@@ -28,11 +28,11 @@ var destructivePatterns = []*regexp.Regexp{
 	regexp.MustCompile(`\bchown\b.+\s+/`),
 	regexp.MustCompile(`\bclawgo\s+uninstall\b`),
 	regexp.MustCompile(`\bdbt\s+drop\b`),
+	regexp.MustCompile(`\bgit\s+clean\b`),
 }
 
 var moderatePatterns = []*regexp.Regexp{
 	regexp.MustCompile(`\bgit\s+reset\s+--hard\b`),
-	regexp.MustCompile(`\bgit\s+clean\b`),
 	regexp.MustCompile(`\bdocker\s+system\s+prune\b`),
 	regexp.MustCompile(`\bapt(-get)?\s+install\b`),
 	regexp.MustCompile(`\byum\s+install\b`),
diff --git a/pkg/tools/shell.go b/pkg/tools/shell.go
index 3e8ebdb..26e735c 100644
--- a/pkg/tools/shell.go
+++ b/pkg/tools/shell.go
@@ -29,15 +29,21 @@ type ExecTool struct {
 }
 
 func NewExecTool(cfg config.ShellConfig, workspace string) *ExecTool {
-	denyPatterns := make([]*regexp.Regexp, 0)
+	denyPatterns := make([]*regexp.Regexp, 0, len(cfg.DeniedCmds))
 	for _, p := range cfg.DeniedCmds {
 		denyPatterns = append(denyPatterns, regexp.MustCompile(`\b`+regexp.QuoteMeta(p)+`\b`))
 	}
 
+	allowPatterns := make([]*regexp.Regexp, 0, len(cfg.AllowedCmds))
+	for _, p := range cfg.AllowedCmds {
+		allowPatterns = append(allowPatterns, regexp.MustCompile(`\b`+regexp.QuoteMeta(p)+`\b`))
+	}
+
 	return &ExecTool{
 		workingDir:          workspace,
 		timeout:             cfg.Timeout,
 		denyPatterns:        denyPatterns,
+		allowPatterns:       allowPatterns,
 		restrictToWorkspace: cfg.RestrictPath,
 		sandboxEnabled:      cfg.Sandbox.Enabled,
 		sandboxImage:        cfg.Sandbox.Image,
@@ -254,7 +260,7 @@ func (t *ExecTool) applyRiskGate(command string, force bool) (string, string) {
 		return "Error: destructive command is disabled by policy (tools.shell.risk.allow_destructive=false).", ""
 	}
 
-	if t.riskCfg.RequireDryRun {
+	if t.riskCfg.RequireDryRun && !force {
 		if dryRunCmd, ok := buildDryRunCommand(command); ok {
 			return "Risk gate: dry-run required first. Review output, then execute intentionally with force=true.", dryRunCmd
 		}
diff --git a/pkg/tools/shell_test.go b/pkg/tools/shell_test.go
new file mode 100644
index 0000000..2d7fef2
--- /dev/null
+++ b/pkg/tools/shell_test.go
@@ -0,0 +1,63 @@
+package tools
+
+import (
+	"testing"
+
+	"clawgo/pkg/config"
+)
+
+func TestApplyRiskGate_DryRunCanBeBypassedWithForce(t *testing.T) {
+	tool := &ExecTool{riskCfg: config.RiskConfig{
+		Enabled:          true,
+		AllowDestructive: true,
+		RequireDryRun:    true,
+		RequireForceFlag: false,
+	}}
+
+	msg, dryRun := tool.applyRiskGate("git clean -fd", true)
+	if msg != "" || dryRun != "" {
+		t.Fatalf("expected force=true to allow execution after dry-run step, got msg=%q dryRun=%q", msg, dryRun)
+	}
+}
+
+func TestApplyRiskGate_RequiresDryRunWithoutForce(t *testing.T) {
+	tool := &ExecTool{riskCfg: config.RiskConfig{
+		Enabled:          true,
+		AllowDestructive: true,
+		RequireDryRun:    true,
+		RequireForceFlag: false,
+	}}
+
+	msg, dryRun := tool.applyRiskGate("git clean -fd", false)
+	if msg == "" {
+		t.Fatal("expected dry-run block message")
+	}
+	if dryRun == "" {
+		t.Fatal("expected dry-run command")
+	}
+}
+
+func TestAssessCommandRisk_GitCleanIsDestructive(t *testing.T) {
+	assessment := assessCommandRisk("git clean -fd")
+	if assessment.Level != RiskDestructive {
+		t.Fatalf("expected git clean to be destructive, got %s", assessment.Level)
+	}
+}
+
+func TestNewExecTool_LoadsAllowedCmdsIntoAllowPatterns(t *testing.T) {
+	tool := NewExecTool(config.ShellConfig{AllowedCmds: []string{"echo"}}, ".")
+	if len(tool.allowPatterns) != 1 {
+		t.Fatalf("expected one allow pattern, got %d", len(tool.allowPatterns))
+	}
+}
+
+func TestGuardCommand_BlocksCommandNotInAllowlist(t *testing.T) {
+	tool := NewExecTool(config.ShellConfig{AllowedCmds: []string{"echo"}}, ".")
+	if msg := tool.guardCommand("ls -la", "."); msg == "" {
+		t.Fatal("expected allowlist to block command not in allowed_cmds")
+	}
+
+	if msg := tool.guardCommand("echo hi", "."); msg != "" {
+		t.Fatalf("expected allowed command to pass guard, got %q", msg)
+	}
+}