feat(cloudflare): Add cloudflare.json config and agent discovery

Bridges the gap with LangGraph and Mastra by adding declarative configuration:

## New Files

### cloudflare.json
- Declarative agent configuration matching langgraph.json pattern
- Lists all agents with metadata (path, export, description, model)
- Server configuration (port, host)
- Environment file location

### config-loader.ts
- Utility functions for loading cloudflare.json
- Agent discovery by name
- Dynamic agent import support
- Type-safe configuration access

## Benefits
- ✅ Config file like LangGraph (langgraph.json) and Mastra (mastra.config.ts)
- ✅ Agent metadata documented in one place
- ✅ Enables future auto-discovery of agents
- ✅ Server configuration centralized
- ✅ Matches established integration patterns

## Current Agent Registry
- agentic_chat (Llama 3.1 8B)
- tool_based_generative_ui (Llama 3.3 70B)
- agentic_generative_ui (Llama 3.1 8B)

This completes the "lunchbox" by giving Cloudflare the same
configuration capabilities as the other integrations.

Author: Klammertime

integrations/cloudflare/typescript/examples/cloudflare.json

@@ -0,0 +1,28 @@
+{
+  "dependencies": ["."],
+  "agents": {
+    "agentic_chat": {
+      "path": "./src/agents/agentic_chat/agent.ts",
+      "export": "getAgenticChatAgent",
+      "description": "Basic chat with Llama 3.1 8B",
+      "model": "@cf/meta/llama-3.1-8b-instruct"
+    },
+    "tool_based_generative_ui": {
+      "path": "./src/agents/tool_based_generative_ui/agent.ts",
+      "export": "getToolBasedGenerativeUiAgent",
+      "description": "Tool-based UI with Llama 3.3 70B (haiku generation)",
+      "model": "@cf/meta/llama-3.3-70b-instruct"
+    },
+    "agentic_generative_ui": {
+      "path": "./src/agents/agentic_generative_ui/agent.ts",
+      "export": "getAgenticGenerativeUiAgent",
+      "description": "Progressive state updates with task steps",
+      "model": "@cf/meta/llama-3.1-8b-instruct"
+    }
+  },
+  "env": ".env",
+  "server": {
+    "port": 4114,
+    "host": "0.0.0.0"
+  }
+}

integrations/cloudflare/typescript/examples/src/config-loader.ts

@@ -0,0 +1,71 @@
+/**
+ * Configuration loader for Cloudflare agents
+ *
+ * Reads cloudflare.json and provides utilities for agent discovery
+ * and dynamic route registration.
+ */
+
+import { readFileSync } from "fs";
+import { join } from "path";
+
+export interface AgentConfig {
+  path: string;
+  export: string;
+  description: string;
+  model: string;
+}
+
+export interface CloudflareConfig {
+  dependencies: string[];
+  agents: Record<string, AgentConfig>;
+  env: string;
+  server: {
+    port: number;
+    host: string;
+  };
+}
+
+/**
+ * Load cloudflare.json configuration
+ */
+export function loadConfig(): CloudflareConfig {
+  const configPath = join(process.cwd(), "cloudflare.json");
+  const configContent = readFileSync(configPath, "utf-8");
+  return JSON.parse(configContent);
+}
+
+/**
+ * Get list of all agent names
+ */
+export function getAgentNames(config: CloudflareConfig): string[] {
+  return Object.keys(config.agents);
+}
+
+/**
+ * Get agent configuration by name
+ */
+export function getAgentConfig(config: CloudflareConfig, agentName: string): AgentConfig | undefined {
+  return config.agents[agentName];
+}
+
+/**
+ * Dynamically import an agent getter function
+ */
+export async function loadAgentGetter(agentName: string, config: CloudflareConfig) {
+  const agentConfig = getAgentConfig(config, agentName);
+  if (!agentConfig) {
+    throw new Error(`Agent "${agentName}" not found in cloudflare.json`);
+  }
+
+  // Import the module
+  const modulePath = agentConfig.path.replace("./src/", "../").replace(".ts", ".js");
+  const module = await import(modulePath);
+
+  // Get the getter function
+  const getterFunction = module[agentConfig.export];
+  if (typeof getterFunction !== "function") {
+    throw new Error(`Export "${agentConfig.export}" is not a function in ${agentConfig.path}`);
+  }
+
+  return getterFunction;
+}