feat: add fswatch, sysinfo, udp modules and file copy/move/stat time operations

Add three new native modules (fswatch, sysinfo, udp) to the Wren CLI build system and module registry. Extend the io module with async file copy and move operations using libuv uv_fs_copyfile and uv_fs_rename, plus expose stat mtime/atime/ctime fields and stdin windowSize. Update the io.wren wrapper with File.write, File.copy, File.move static methods and corresponding foreign declarations. Add shebang lines to generator2.wren, merge_all_wren.wren, merge_docs.wren, and phonebook.wren scripts.

apps/generator2.wren

@@ -0,0 +1,144 @@
+#!/usr/local/bin/wren
+
+import "pathlib" for Path
+import "http" for Http
+import "json" for Json
+import "env" for Environment
+import "argparse" for ArgumentParser
+import "os" for Process
+
+class SourceCodeGenerator {
+  static VERSION { "1.0" }
+  static DEFAULT_MODEL { "anthropic/claude-haiku-4.5" }
+  static API_ENDPOINT { "https://openrouter.ai/api/v1/chat/completions" }
+  static TUTORIAL_PATH { "apps/minitut.md" }
+
+  static DEFAULT_PROMPT {
+    "A small but useful application that combines several modules / libraries that is plug and play to use! Small description on top commenten what the application is and what it does and where it can be used for."
+  }
+
+  static run() {
+    System.print("// wren source code generator v%(this.VERSION)")
+
+    var startTime = System.clock
+    var args = parseArguments()
+    var apiKey = getApiKey()
+    var tutorial = loadTutorial()
+    var messages = buildMessages(tutorial, args["prompt"])
+    var sourceCode = generateCode(apiKey, messages)
+
+    printResults(startTime, sourceCode)
+    saveOutput(args["output"], sourceCode)
+  }
+
+  static parseArguments() {
+    var parser = ArgumentParser.new()
+    parser.addArgument("prompt", {"default": this.DEFAULT_PROMPT})
+    parser.addArgument("-o", {"long": "--output", "default": ""})
+    return parser.parseArgs()
+  }
+
+  static getApiKey() {
+    var apiKey = Environment.get("OPENROUTER_API_KEY")
+    if (apiKey == null || apiKey.count == 0) {
+      System.print("Error: OPENROUTER_API_KEY environment variable not set")
+      Fiber.abort("Missing API key")
+    }
+    return apiKey
+  }
+
+  static loadTutorial() {
+    return Path.new(this.TUTORIAL_PATH).readText()
+  }
+
+  static buildMessages(tutorial, userPrompt) {
+    var messages = []
+    messages.add({
+      "role": "system",
+      "content": "You are an application generator that will produce wren source code exclusively as described below:\n" + tutorial
+    })
+    messages.add({
+      "role": "user",
+      "content": "Please generate source code based on everything what i say from now on."
+    })
+    messages.add({
+      "role": "assistant",
+      "content": "I will respond in literally valid JSON only in this format: {\"source_code\":\"<the source code>\"} without any markup or markdown formatting."
+    })
+    messages.add({
+      "role": "user",
+      "content": userPrompt
+    })
+    return messages
+  }
+
+  static generateCode(apiKey, messages) {
+    var requestBody = {
+      "model": "%(this.DEFAULT_MODEL)",
+      "messages": messages
+    }
+
+    var headers = {
+      "Authorization": "Bearer " + apiKey,
+      "Content-Type": "application/json"
+    }
+
+    var response = Http.post(this.API_ENDPOINT, requestBody, headers)
+
+    if (!response.ok) {
+      System.print("Error: %(response.body)")
+      return ""
+    }
+
+    return extractSourceCode(response.body)
+  }
+
+  static extractSourceCode(responseBody) {
+    var data = Json.parse(responseBody)
+
+    if (data == null || data["choices"] == null || data["choices"].count == 0) {
+      return ""
+    }
+
+    var message = data["choices"][0]["message"]
+    if (message == null || message["content"] == null) {
+      return ""
+    }
+
+    var text = message["content"]
+    text = stripMarkdownWrapper(text)
+    text = extractFromJson(text)
+
+    return text
+  }
+
+  static stripMarkdownWrapper(text) {
+    if (text.startsWith("```")) {
+      return text[7..-4].trim()
+    }
+    return text
+  }
+
+  static extractFromJson(text) {
+    if (text.startsWith("{")) {
+      return Json.parse(text)["source_code"]
+    }
+    return text
+  }
+
+  static printResults(startTime, output) {
+    var elapsedTime = System.clock - startTime
+    System.print("// Generation time: %(elapsedTime)")
+    System.print("")
+    System.print(output)
+  }
+
+  static saveOutput(outputPath, content) {
+    if (!outputPath.isEmpty) {
+      Path.new(outputPath).writeText(content)
+    }
+  }
+}
+
+SourceCodeGenerator.run()
+

apps/merge_all_wren.wren

@@ -1,3 +1,5 @@
+#!/usr/local/bin/wren
+
 import "io" for File, Directory
 
 class WrenFileReader {

apps/merge_docs.wren

@@ -1,3 +1,5 @@
+#!/usr/local/bin/wren
+
 import "pathlib" for Path
 
 var startTime = System.clock

apps/phonebook.wren

@@ -1,3 +1,4 @@
+#!/usr/local/bin/wren
 // wren source code generator v1.0
 // Generation time: 0.101419