data fixes, partial custom indicator support

gateway/src/harness/subagents/web-explore/index.ts

@@ -0,0 +1,92 @@
+import { BaseSubagent, type SubagentConfig, type SubagentContext } from '../base-subagent.js';
+import type { BaseChatModel } from '@langchain/core/language_models/chat_models';
+import { SystemMessage } from '@langchain/core/messages';
+import { createReactAgent } from '@langchain/langgraph/prebuilt';
+import type { FastifyBaseLogger } from 'fastify';
+
+/**
+ * Web Explore Subagent
+ *
+ * Accepts a research instruction, searches the web (DuckDuckGo) or arXiv
+ * for academic queries, fetches relevant page/PDF content, and returns a
+ * markdown summary with cited sources.
+ *
+ * No MCP client needed — operates entirely through platform tools.
+ */
+export class WebExploreSubagent extends BaseSubagent {
+  constructor(
+    config: SubagentConfig,
+    model: BaseChatModel,
+    logger: FastifyBaseLogger,
+    tools?: any[]
+  ) {
+    super(config, model, logger, undefined, tools);
+  }
+
+  async execute(context: SubagentContext, instruction: string): Promise<string> {
+    this.logger.info(
+      {
+        subagent: this.getName(),
+        userId: context.userContext.userId,
+        instruction: instruction.substring(0, 200),
+        toolCount: this.tools.length,
+        toolNames: this.tools.map(t => t.name),
+      },
+      'Web explore subagent starting'
+    );
+
+    const initialMessages = this.buildMessages(context, instruction);
+    const systemMessage = initialMessages[0];
+    const humanMessage = initialMessages[initialMessages.length - 1];
+
+    const agent = createReactAgent({
+      llm: this.model,
+      tools: this.tools,
+      prompt: systemMessage as SystemMessage,
+    });
+
+    const result = await agent.invoke(
+      { messages: [humanMessage] },
+      { recursionLimit: 15 }
+    );
+
+    const allMessages: any[] = result.messages ?? [];
+
+    this.logger.info({ messageCount: allMessages.length }, 'Web explore subagent graph completed');
+
+    const lastAI = [...allMessages].reverse().find(
+      (m: any) => m.constructor?.name === 'AIMessage' || m._getType?.() === 'ai'
+    );
+
+    const finalText = lastAI
+      ? (typeof lastAI.content === 'string' ? lastAI.content : JSON.stringify(lastAI.content))
+      : 'No results found.';
+
+    this.logger.info({ textLength: finalText.length }, 'Web explore subagent finished');
+
+    return finalText;
+  }
+}
+
+/**
+ * Factory function to create and initialize WebExploreSubagent
+ */
+export async function createWebExploreSubagent(
+  model: BaseChatModel,
+  logger: FastifyBaseLogger,
+  basePath: string,
+  tools?: any[]
+): Promise<WebExploreSubagent> {
+  const { readFile } = await import('fs/promises');
+  const { join } = await import('path');
+  const yaml = await import('js-yaml');
+
+  const configPath = join(basePath, 'config.yaml');
+  const configContent = await readFile(configPath, 'utf-8');
+  const config = yaml.load(configContent) as SubagentConfig;
+
+  const subagent = new WebExploreSubagent(config, model, logger, tools);
+  await subagent.initialize(basePath);
+
+  return subagent;
+}