feat(features): add claude-code-agent-loader, mcp-loader, session-state

src/features/claude-code-mcp-loader/env-expander.ts

@@ -0,0 +1,27 @@
+export function expandEnvVars(value: string): string {
+  return value.replace(
+    /\$\{([^}:]+)(?::-([^}]*))?\}/g,
+    (_, varName: string, defaultValue?: string) => {
+      const envValue = process.env[varName]
+      if (envValue !== undefined) return envValue
+      if (defaultValue !== undefined) return defaultValue
+      return ""
+    }
+  )
+}
+
+export function expandEnvVarsInObject<T>(obj: T): T {
+  if (obj === null || obj === undefined) return obj
+  if (typeof obj === "string") return expandEnvVars(obj) as T
+  if (Array.isArray(obj)) {
+    return obj.map((item) => expandEnvVarsInObject(item)) as T
+  }
+  if (typeof obj === "object") {
+    const result: Record<string, unknown> = {}
+    for (const [key, value] of Object.entries(obj)) {
+      result[key] = expandEnvVarsInObject(value)
+    }
+    return result as T
+  }
+  return obj
+}