fix(coding-agent): allow suppressing custom tool transcript blocks

packages/coding-agent/test/tool-execution-component.test.ts

@@ -0,0 +1,72 @@
+import { Text, type TUI } from "@mariozechner/pi-tui";
+import { Type } from "@sinclair/typebox";
+import stripAnsi from "strip-ansi";
+import { beforeAll, describe, expect, test } from "vitest";
+import type { ToolDefinition } from "../src/core/extensions/types.js";
+import { ToolExecutionComponent } from "../src/modes/interactive/components/tool-execution.js";
+import { initTheme } from "../src/modes/interactive/theme/theme.js";
+
+function createBaseToolDefinition(): ToolDefinition {
+	return {
+		name: "custom_tool",
+		label: "custom_tool",
+		description: "custom tool",
+		parameters: Type.Any(),
+		execute: async () => ({
+			content: [{ type: "text", text: "ok" }],
+			details: {},
+		}),
+	};
+}
+
+function createFakeTui(): TUI {
+	return {
+		requestRender: () => {},
+	} as unknown as TUI;
+}
+
+describe("ToolExecutionComponent custom renderer suppression", () => {
+	beforeAll(() => {
+		initTheme("dark");
+	});
+
+	test("renders no lines when custom renderers return undefined", () => {
+		const toolDefinition: ToolDefinition = {
+			...createBaseToolDefinition(),
+			renderCall: () => undefined,
+			renderResult: () => undefined,
+		};
+
+		const component = new ToolExecutionComponent("custom_tool", {}, {}, toolDefinition, createFakeTui());
+		expect(component.render(120)).toEqual([]);
+
+		component.updateResult(
+			{
+				content: [{ type: "text", text: "hidden" }],
+				details: {},
+				isError: false,
+			},
+			false,
+		);
+
+		expect(component.render(120)).toEqual([]);
+	});
+
+	test("keeps built-in tool rendering visible", () => {
+		const component = new ToolExecutionComponent("read", { path: "README.md" }, {}, undefined, createFakeTui());
+		const rendered = stripAnsi(component.render(120).join("\n"));
+		expect(rendered).toContain("read");
+	});
+
+	test("keeps custom tool rendering visible when renderer returns a component", () => {
+		const toolDefinition: ToolDefinition = {
+			...createBaseToolDefinition(),
+			renderCall: () => new Text("custom call", 0, 0),
+			renderResult: () => undefined,
+		};
+
+		const component = new ToolExecutionComponent("custom_tool", {}, {}, toolDefinition, createFakeTui());
+		const rendered = stripAnsi(component.render(120).join("\n"));
+		expect(rendered).toContain("custom call");
+	});
+});