fix(coding-agent): fix CI type check and image-only steering test

- type-check subagent-extension.test.ts against the extension view like the other subagent test
- update the test to current ToolRenderContext and ExtensionToolContext types
- use a decodable PNG in the image-only steering test; the fake data was omitted by image processing

packages/coding-agent/examples/tsconfig.json

@@ -189,7 +189,8 @@
 	"include": [
 		"./extensions/**/*",
 		"../../*/src/**/*.d.ts",
-		"../test/suite/regressions/8261-subagent-project-trust.test.ts"
+		"../test/suite/regressions/8261-subagent-project-trust.test.ts",
+		"../test/subagent-extension.test.ts"
 	],
 	"exclude": [
 		"**/node_modules/**",

packages/coding-agent/test/subagent-extension.test.ts

@@ -7,7 +7,7 @@ import { fauxAssistantMessage, fauxToolCall, type Message } from "@earendil-work
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import subagentExtension from "../examples/extensions/subagent/index.ts";
 import { CONFIG_DIR_NAME } from "../src/config.ts";
-import type { ExtensionAPI, ExtensionContext, ToolDefinition } from "../src/core/extensions/index.ts";
+import type { ExtensionAPI, ExtensionToolContext, ToolDefinition } from "../src/core/extensions/index.ts";
 import { DEFAULT_MAX_BYTES, DEFAULT_MAX_LINES } from "../src/core/tools/truncate.ts";
 import { createHarness, type Harness } from "./suite/harness.ts";
 
@@ -111,22 +111,22 @@ function createTool(): ToolDefinition {
 	return registered;
 }
 
-function createContext(cwd: string): ExtensionContext {
+function createContext(cwd: string): ExtensionToolContext {
 	return {
 		cwd,
 		hasUI: false,
 		model: { provider: "test", id: "dispatch-alias" },
 		thinkingLevel: "high",
 		isProjectTrusted: () => false,
-	} as unknown as ExtensionContext;
+	} as unknown as ExtensionToolContext;
 }
 
 function createInteractiveContext(
-	base: ExtensionContext,
+	base: ExtensionToolContext,
 	confirm: (title: string, message: string) => Promise<boolean>,
 	trusted = false,
-): ExtensionContext {
+): ExtensionToolContext {
-	return { ...base, hasUI: true, ui: { confirm }, isProjectTrusted: () => trusted } as unknown as ExtensionContext;
+	return { ...base, hasUI: true, ui: { confirm }, isProjectTrusted: () => trusted } as unknown as ExtensionToolContext;
 }
 
 function singleTask(task: string, overrides: Record<string, unknown> = {}): Record<string, unknown> {
@@ -204,6 +204,10 @@ function renderText(tool: ToolDefinition, result: AgentToolResult<unknown>, expa
 		expanded,
 		showImages: false,
 		isError: false,
+		durationMs: undefined,
+		outputPad: 0,
+		keyText: () => "",
+		keyHint: (_keybinding, description) => description,
 	});
 	return component.render(160).join("\n");
 }
@@ -211,7 +215,7 @@ function renderText(tool: ToolDefinition, result: AgentToolResult<unknown>, expa
 describe("subagent example extension", () => {
 	let tempDir: string;
 	let tool: ToolDefinition;
-	let ctx: ExtensionContext;
+	let ctx: ExtensionToolContext;
 	const harnesses: Harness[] = [];
 
 	function executeSubagent(
@@ -219,7 +223,7 @@ describe("subagent example extension", () => {
 		options: {
 			signal?: AbortSignal;
 			onUpdate?: (result: AgentToolResult<unknown>) => void;
-			context?: ExtensionContext;
+			context?: ExtensionToolContext;
 		} = {},
 	): Promise<AgentToolResult<unknown>> {
 		return withFixtureInvocation(() =>
@@ -419,7 +423,9 @@ describe("subagent example extension", () => {
 			expect(toolResult?.role).toBe("toolResult");
 			if (toolResult?.role === "toolResult") {
 				expect(toolResult.isError).toBe(true);
-				expect((toolResult.details as TestSubagentDetails).results[0].errorMessage).toBe("provider evidence");
+				expect((toolResult.details as unknown as TestSubagentDetails).results[0].errorMessage).toBe(
+					"provider evidence",
+				);
 			}
 		});
 

packages/coding-agent/test/suite/agent-session-queue.test.ts

@@ -5,6 +5,10 @@ import { Type } from "typebox";
 import { afterEach, describe, expect, it } from "vitest";
 import { createHarness, getAssistantTexts, getMessageText, getUserTexts, type Harness } from "./harness.ts";
 
+// Image processing omits images it cannot decode, so the fixture must be a real PNG.
+const TINY_PNG_BASE64 =
+	"iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8z8DwHwAFBQIAX8jx0gAAAABJRU5ErkJggg==";
+
 async function createWaitingHarness(
 	options: {
 		tools?: AgentTool[];
@@ -456,7 +460,7 @@ describe("AgentSession queue characterization", () => {
 		]);
 
 		await waitForToolStart;
-		await harness.session.steer("", [{ type: "image", mimeType: "image/png", data: "ZmFrZQ==" }]);
+		await harness.session.steer("", [{ type: "image", mimeType: "image/png", data: TINY_PNG_BASE64 }]);
 		expect(harness.session.pendingMessageCount).toBe(1);
 		releaseToolExecution();
 		await promptPromise;

tsconfig.json

@@ -68,5 +68,5 @@
 		}
 	},
 	"include": ["scripts/model-catalog-protocol.ts", "scripts/model-catalog-protocol.test.ts", "packages/*/src/**/*", "packages/*/test/**/*", "packages/ai/catalog/**/*", "packages/durable/test-workers/**/*", "packages/coding-agent/examples/**/*", "packages/agent/examples/**/*"],
-	"exclude": ["**/dist/**", "packages/coding-agent/examples/extensions/**", "packages/coding-agent/test/suite/regressions/8261-subagent-project-trust.test.ts"]
+	"exclude": ["**/dist/**", "packages/coding-agent/examples/extensions/**", "packages/coding-agent/test/suite/regressions/8261-subagent-project-trust.test.ts", "packages/coding-agent/test/subagent-extension.test.ts"]
 }