feat(FN-2996): add research agent tools with extension wiring, remote setti

This merge brings multiple substantial features: new research extension tools wired through the AI engine (with full test coverage and documentation), legacy routines agentId backward compatibility with migration paths, migration of experimental remote settings to the global scope, Nerd Font glyph a

Fusion-Task-Id: FN-2996

packages/engine/src/triage.ts

@@ -40,6 +40,7 @@ import {
   createDelegateTaskTool,
   createListAgentsTool,
   createMemoryTools,
+  createResearchTools,
   createTaskDocumentReadTool,
   createTaskDocumentWriteTool,
 } from "./agent-tools.js";
@@ -231,6 +232,10 @@ When the planning conversation produces a structured plan, save it as a document
 - Testing & Verification must run before Documentation & Delivery
 - Avoid giant catch-all steps; split outcomes so execution can be verified incrementally
 
+## Research tools
+When spec work needs missing domain context, you may use research tools (\`fn_research_run\`, \`fn_research_list\`, \`fn_research_get\`, \`fn_research_cancel\`). Keep research bounded to the task at hand, prefer concise queries, and write durable findings into task documents when useful.
+If research is unavailable or unconfigured, continue planning with repository context and clearly note assumptions.
+
 ## Guidelines
 - Read the project structure and relevant source files to understand context BEFORE writing
 - Check package.json/scripts and explicit project commands to align real lint/test/build/typecheck commands
@@ -867,6 +872,11 @@ export class TriageProcessor {
           }),
           createTaskDocumentWriteTool(this.store, task.id),
           createTaskDocumentReadTool(this.store, task.id),
+          ...createResearchTools({
+            store: this.store,
+            rootDir: this.rootDir,
+            getSettings: async () => this.store.getSettings(),
+          }),
           ...createMemoryTools(this.rootDir, settings),
           // Agent delegation tools — discover and delegate work to other agents.
           ...(this.options.agentStore ? [