feat: import launch context module in global API file

- Added import statement for the launch-context module in the global.ts file to enhance modularity and functionality.

Author: johnlindquist

src/api/global.ts

@@ -12,6 +12,7 @@ import {
 } from "../core/utils.js"
 
 import "../globals/index.js"
+import "./launch-context.js"
 
 import { getScripts } from "../core/db.js"
 import type { PromptConfig } from "../types/core"

src/api/launch-context.ts

@@ -0,0 +1,43 @@
+/**
+ * Provides information about how the current script was launched
+ */
+
+export type LaunchContext = 'mcp' | 'http' | 'socket' | 'direct' | 'cli'
+
+declare global {
+  /**
+   * The context in which the script was launched
+   * - 'mcp': Launched via Model Context Protocol server
+   * - 'http': Launched via HTTP server
+   * - 'socket': Launched via Unix socket (sk)
+   * - 'direct': Direct internal call
+   * - 'cli': Command line (future)
+   */
+  var KIT_LAUNCH_CONTEXT: LaunchContext
+  var _KIT_LAUNCH_CONTEXT_CACHE: LaunchContext | undefined
+}
+
+// Lazy getter that determines launch context on first access
+Object.defineProperty(global, 'KIT_LAUNCH_CONTEXT', {
+  get() {
+    // Return cached value if already determined
+    if (global._KIT_LAUNCH_CONTEXT_CACHE !== undefined) {
+      return global._KIT_LAUNCH_CONTEXT_CACHE
+    }
+    
+    // Determine launch context from headers
+    const headers = global.headers || {}
+    
+    // Check the X-Kit-Launch-Context header set by handleScript
+    if (headers['X-Kit-Launch-Context']) {
+      global._KIT_LAUNCH_CONTEXT_CACHE = headers['X-Kit-Launch-Context'] as LaunchContext
+    } else {
+      // Fallback to 'direct' if no context header is present
+      global._KIT_LAUNCH_CONTEXT_CACHE = 'direct'
+    }
+    
+    return global._KIT_LAUNCH_CONTEXT_CACHE
+  },
+  enumerable: true,
+  configurable: true
+})