data fixes, partial custom indicator support

gateway/src/tools/platform/web-explore-agent.tool.ts

@@ -0,0 +1,49 @@
+import { DynamicStructuredTool } from '@langchain/core/tools';
+import { z } from 'zod';
+import type { FastifyBaseLogger } from 'fastify';
+import type { WebExploreSubagent } from '../../harness/subagents/web-explore/index.js';
+import type { SubagentContext } from '../../harness/subagents/base-subagent.js';
+
+export interface WebExploreAgentToolConfig {
+  webExploreSubagent: WebExploreSubagent;
+  context: SubagentContext;
+  logger: FastifyBaseLogger;
+}
+
+/**
+ * Creates a LangChain tool that delegates to the web-explore subagent.
+ * The subagent decides whether to use web search or arXiv based on the instruction.
+ */
+export function createWebExploreAgentTool(config: WebExploreAgentToolConfig): DynamicStructuredTool {
+  const { webExploreSubagent, context, logger } = config;
+
+  return new DynamicStructuredTool({
+    name: 'web_explore',
+    description: `Search the web or academic databases and return a summarized answer.
+
+Use this tool when the user asks about:
+- Current events, news, or real-time information
+- Documentation, tutorials, or how-to guides
+- Academic papers, research findings, or scientific topics
+- Any topic that benefits from external sources
+
+The subagent will search the web (or arXiv for academic queries), fetch relevant content, and return a markdown summary with cited sources.`,
+    schema: z.object({
+      instruction: z.string().describe(
+        'What to search for and summarize. Be specific — include the topic, what aspects matter, ' +
+        'and any context that helps narrow the search (e.g. "recent papers on momentum factor in equities" ' +
+        'or "how to configure rate limiting in Fastify").'
+      ),
+    }),
+    func: async ({ instruction }: { instruction: string }): Promise<string> => {
+      logger.info({ instruction: instruction.substring(0, 100) }, 'Delegating to web-explore subagent');
+
+      try {
+        return await webExploreSubagent.execute(context, instruction);
+      } catch (error) {
+        logger.error({ error, errorMessage: (error as Error)?.message }, 'Web explore subagent failed');
+        throw error;
+      }
+    },
+  });
+}