fix(agentcontainer): format VS Code settings log

cmd/internal/agentcontainer/setup.go

@@ -750,7 +750,11 @@ func (cmd *SetupContainerCmd) setupVSCode(
 ) error {
 	log.Debugf("setup %s", flavor.DisplayName())
 	vsCodeConfiguration := config.GetVSCodeConfiguration(setupInfo.MergedConfig)
-	log.Debugf("vscode settings: %v", vsCodeConfiguration.Settings)
+	formattedSettings, err := formatVSCodeSettings(vsCodeConfiguration.Settings)
+	if err != nil {
+		return err
+	}
+	log.Debugf("vscode settings:\n%s", formattedSettings)
 	settings := ""
 	if len(vsCodeConfiguration.Settings) > 0 {
 		out, err := json.Marshal(vsCodeConfiguration.Settings)
@@ -762,7 +766,7 @@ func (cmd *SetupContainerCmd) setupVSCode(
 	}
 
 	user := config.GetRemoteUser(setupInfo)
-	err := vscode.NewVSCodeServer(vscode.ServerOptions{
+	err = vscode.NewVSCodeServer(vscode.ServerOptions{
 		Extensions: vsCodeConfiguration.Extensions,
 		Settings:   settings,
 		UserName:   user,
@@ -805,6 +809,15 @@ func (cmd *SetupContainerCmd) setupVSCode(
 		})
 }
 
+func formatVSCodeSettings(settings map[string]any) (string, error) {
+	formatted, err := json.MarshalIndent(settings, "", "  ")
+	if err != nil {
+		return "", err
+	}
+
+	return string(formatted), nil
+}
+
 // setupBrowserIDE installs and starts any of the browser-based IDEs
 // (openvscode, code-server, VS Code Web). The per-IDE differences live in the
 // browserIDEs registry, so the install/extensions/start flow is written once.

cmd/internal/agentcontainer/setup_internal_test.go

@@ -62,6 +62,40 @@ func TestCompressSetupInfoPreservesSubstitutedValues(t *testing.T) {
 	assert.Equal(t, "/home/testuser", *gotHome)
 }
 
+func TestFormatVSCodeSettings(t *testing.T) {
+	settings := map[string]any{
+		"python": map[string]any{
+			"editor.defaultFormatter": "ms-python.autopep8",
+		},
+		"editor": map[string]any{
+			"codeActionsOnSave": []any{"source.organizeImports", "source.fixAll"},
+		},
+	}
+
+	formatted, err := formatVSCodeSettings(settings)
+	require.NoError(t, err)
+	assert.Equal(t, `{
+  "editor": {
+    "codeActionsOnSave": [
+      "source.organizeImports",
+      "source.fixAll"
+    ]
+  },
+  "python": {
+    "editor.defaultFormatter": "ms-python.autopep8"
+  }
+}`, formatted)
+
+	repeated, err := formatVSCodeSettings(settings)
+	require.NoError(t, err)
+	assert.Equal(t, formatted, repeated)
+}
+
+func TestFormatVSCodeSettingsReturnsSerializationError(t *testing.T) {
+	_, err := formatVSCodeSettings(map[string]any{"unsupported": func() {}})
+	require.Error(t, err)
+}
+
 func TestSecretsEnvRoundTripPreservesMultilineValues(t *testing.T) {
 	entries := []string{
 		"TLS_KEY=-----BEGIN KEY-----\nline1\nline2\n-----END KEY-----",