fix: double-quote --allow-domains args containing ${{ }} expressions

pkg/workflow/awf_helpers.go

@@ -222,15 +222,16 @@ func BuildAWFArgs(config AWFCommandConfig) []string {
 		awfHelpersLog.Printf("Added %d custom mounts from agent config", len(sortedMounts))
 	}
 
-	// Add allowed domains. Pass the raw value so shellEscapeArg (via shellJoinArgs)
-	// single-quotes it, which safely handles wildcards like *.domain.com without
-	// shell glob expansion and without adding literal double-quote characters.
+	// Add allowed domains. When the value contains ${{ }} GitHub Actions expressions,
+	// shellEscapeArg (via shellJoinArgs) double-quotes it so the expression is preserved
+	// for GA evaluation. Otherwise it single-quotes, safely handling wildcards like
+	// *.domain.com without shell glob expansion.
 	awfArgs = append(awfArgs, "--allow-domains", config.AllowedDomains)
 
 	// Add blocked domains if specified
 	blockedDomains := formatBlockedDomains(config.WorkflowData.NetworkPermissions)
 	if blockedDomains != "" {
-		// Same single-quoting rationale as --allow-domains above
+		// Same quoting rationale as --allow-domains above
 		awfArgs = append(awfArgs, "--block-domains", blockedDomains)
 		awfHelpersLog.Printf("Added blocked domains: %s", blockedDomains)
 	}

pkg/workflow/shell.go

@@ -24,6 +24,17 @@
 // shellEscapeArg escapes a single argument for safe use in shell commands
 // Arguments containing special characters are wrapped in single quotes
 func shellEscapeArg(arg string) string {
+	// If the argument contains GitHub Actions expressions (${{ }}), use double-quote
+	// wrapping. GitHub Actions evaluates ${{ }} at the YAML level before the shell runs,
+	// so single-quoting would mangle the expression syntax (e.g., 'staging' inside
+	// ${{ env.X == 'staging' }} becomes '\''staging'\'' which GA cannot parse).
+	// Double-quoting preserves the expression for GA evaluation.
+	if containsGitHubActionsExpression(arg) {
+		shellLog.Print("Argument contains GitHub Actions expression, using double-quote wrapping")
+		escaped := strings.ReplaceAll(arg, `"`, `\"`)
+		return `"` + escaped + `"`
+	}
+
 	// Check if the argument contains special shell characters that need escaping
 	if strings.ContainsAny(arg, "()[]{}*?$`\"'\\|&;<> \t\n") {
 		shellLog.Print("Argument contains special characters, applying escaping")
@@ -36,6 +47,16 @@
 	return arg
 }
 
+// containsGitHubActionsExpression checks if a string contains GitHub Actions
+// expressions (${{ ... }}). It verifies that ${{ appears before }}.
+func containsGitHubActionsExpression(s string) bool {
+	openIdx := strings.Index(s, "${{")
+	if openIdx < 0 {
+		return false
+	}
+	return strings.Index(s[openIdx:], "}}") >= 0
+}
+
 // buildDockerCommandWithExpandableVars builds a properly quoted docker command
 // that allows ${GITHUB_WORKSPACE} and $GITHUB_WORKSPACE to be expanded at runtime
 func buildDockerCommandWithExpandableVars(cmd string) string {

pkg/workflow/shell_test.go

@@ -93,6 +93,21 @@ func TestShellEscapeArg(t *testing.T) {
 			input:    "path\\to\\file",
 			expected: "'path\\to\\file'",
 		},
+		{
+			name:     "GitHub Actions expression uses double quotes",
+			input:    "${{ env.MCP_ENV == 'staging' && env.MCP_URL_STAGING || env.MCP_URL_PROD }},errors.code.visualstudio.com",
+			expected: `"${{ env.MCP_ENV == 'staging' && env.MCP_URL_STAGING || env.MCP_URL_PROD }},errors.code.visualstudio.com"`,
+		},
+		{
+			name:     "simple GitHub Actions expression uses double quotes",
+			input:    "${{ env.DOMAINS }}",
+			expected: `"${{ env.DOMAINS }}"`,
+		},
+		{
+			name:     "GitHub Actions expression with embedded double quotes escapes them",
+			input:    `${{ env.X == "test" && env.Y || env.Z }}`,
+			expected: `"${{ env.X == \"test\" && env.Y || env.Z }}"`,
+		},
 	}
 
 	for _, tt := range tests {
@@ -131,6 +146,11 @@ func TestShellJoinArgs(t *testing.T) {
 			input:    []string{"copilot", "--add-dir", "/tmp/gh-aw/", "--prompt", "\"$INSTRUCTION\""},
 			expected: "copilot --add-dir /tmp/gh-aw/ --prompt '\"$INSTRUCTION\"'",
 		},
+		{
+			name:     "allow-domains with GitHub Actions expression uses double quotes",
+			input:    []string{"--allow-domains", "${{ env.MCP_ENV == 'staging' && env.MCP_URL_STAGING || env.MCP_URL_PROD }},errors.code.visualstudio.com"},
+			expected: `--allow-domains "${{ env.MCP_ENV == 'staging' && env.MCP_URL_STAGING || env.MCP_URL_PROD }},errors.code.visualstudio.com"`,
+		},
 	}
 
 	for _, tt := range tests {