feat(agent): add typed server API tools

tests/frontendAction/callIdPlugin.test.ts

@@ -2,7 +2,7 @@ import { describe, expect, it } from "bun:test";
 import { readdirSync, readFileSync } from "node:fs";
 import { join } from "node:path";
 
-import { FRONTEND_ACTION_TOOLS, frontendActionCallIdPlugin } from "../../.opencode/plugins/frontend-action-call-id.js";
+import { FRONTEND_ACTION_TOOLS, frontendActionCallIdPlugin, server } from "../../.opencode/plugins/frontend-action-call-id.js";
 import { frontendActionRegistry } from "../../src/frontendAction/registry.js";
 
 const frontendActionToolNames = () => readdirSync(".opencode/tools")
@@ -17,6 +17,10 @@ describe("frontend action call ID plugin", () => {
     expect(config.plugin).toContain("./.opencode/plugins/frontend-action-call-id.ts");
   });
 
+  it("exposes the server export required by OpenCode", () => {
+    expect(server).toBe(frontendActionCallIdPlugin);
+  });
+
   it("overwrites forged IDs only for allowlisted tools", async () => {
     const hooks = await frontendActionCallIdPlugin({} as never);
     const before = hooks["tool.execute.before"];

tests/frontendAction/coordinator.test.ts

@@ -44,4 +44,47 @@ describe("FrontendActionCoordinator", () => {
     coordinator.registerSink("s", () => undefined);
     expect(() => coordinator.request({ sessionId: "s", toolCallId: "c", name: "unknown", params: {} })).toThrow("unknown frontend action");
   });
+
+  it("requires a valid time range when opening history data", async () => {
+    const coordinator = new FrontendActionCoordinator();
+    let emitted: FrontendActionRequest | undefined;
+    coordinator.registerSink("s", (request) => { emitted = request; });
+    expect(() => coordinator.request({
+      sessionId: "s",
+      toolCallId: "c",
+      name: "view_history",
+      params: { feature_infos: [["node-1", "junction"]], data_type: "realtime" },
+    })).toThrow("invalid frontend action params");
+    expect(() => coordinator.request({
+      sessionId: "s",
+      toolCallId: "c",
+      name: "view_history",
+      params: {
+        feature_infos: [["node-1", "junction"]],
+        data_type: "realtime",
+        start_time: "2026-07-14T00:00:00Z",
+        end_time: "2026-07-14T00:00:00Z",
+      },
+    })).toThrow("invalid frontend action params");
+    const pending = coordinator.request({
+      sessionId: "s",
+      toolCallId: "c",
+      name: "view_history",
+      params: {
+        feature_infos: [["node-1", "junction"]],
+        data_type: "realtime",
+        start_time: "2026-07-14T00:00:00Z",
+        end_time: "2026-07-14T01:00:00Z",
+      },
+    });
+    if (!emitted) throw new Error("request was not emitted");
+    coordinator.submitResult("s", {
+      version: "frontend-action-result@1",
+      actionId: emitted.actionId,
+      status: "succeeded",
+      output: { component: "HistoryPanel", rendered: true, itemCount: 1 },
+      completedAt: Date.now(),
+    });
+    await expect(pending).resolves.toMatchObject({ status: "succeeded" });
+  });
 });