test(e2e): add Bedrock smoke test for Claude Opus 4.8

Addresses @edelauna's review request on #386 to cover 4.8 in the new
Bedrock e2e harness.

Mirrors the existing user-agent smoke test but re-points the provider at
us.anthropic.claude-opus-4-8. Since 4.8 is an adaptive-thinking model, this
exercises the request path that omits temperature (and sends thinking.type
"adaptive" when reasoning is enabled), proving a Bedrock round-trip
completes without a 400. Runs against the binary-event-stream mock server in
CI and against real AWS when BEDROCK_LIVE_E2E=true. The original 4.7-era
test is left untouched; model id is overridable via BEDROCK_OPUS_48_MODEL_ID.

check-types clean (tsconfig.esm.json).

Author: vandre-sales

apps/vscode-e2e/src/suite/providers/bedrock.test.ts

@@ -8,6 +8,10 @@ const AWS_BEARER_TOKEN_BEDROCK = process.env.AWS_BEARER_TOKEN_BEDROCK
 const BEDROCK_REGION = process.env.BEDROCK_REGION ?? "us-east-1"
 // Use a cross-region inference profile so the token works without per-region model access.
 const BEDROCK_MODEL_ID = process.env.BEDROCK_MODEL_ID ?? "us.anthropic.claude-haiku-4-5-20251001-v1:0"
+// Claude Opus 4.8 routed through a cross-region inference profile. 4.8 is an
+// adaptive-thinking model, so this exercises the request path that omits
+// temperature and (when reasoning is enabled) sends thinking.type "adaptive".
+const BEDROCK_OPUS_48_MODEL_ID = process.env.BEDROCK_OPUS_48_MODEL_ID ?? "us.anthropic.claude-opus-4-8"
 const BEDROCK_LIVE_E2E = process.env.BEDROCK_LIVE_E2E === "true"
 
 suite("Bedrock provider", function () {
@@ -91,4 +95,53 @@ suite("Bedrock provider", function () {
 			assert.ok(true, "Task completed successfully via Bedrock with ZooCode# userAgentAppId")
 		}
 	})
+
+	test("Should complete a task end-to-end via AWS Bedrock using Claude Opus 4.8", async () => {
+		const api = globalThis.api
+
+		// Re-point the provider at Claude Opus 4.8 while keeping the same transport
+		// (mock server in CI, real AWS in live mode). Parity smoke test: it proves the
+		// 4.8 request path — model resolution, adaptive-thinking payload, and the
+		// temperature omission required by 4.7+ — completes a Bedrock round-trip
+		// without a 400. The mock server replies with the same attempt_completion("4")
+		// tool call regardless of model, so a successful completion exercises request
+		// formation end-to-end.
+		if (!process.env.AIMOCK_URL && BEDROCK_LIVE_E2E && AWS_BEARER_TOKEN_BEDROCK) {
+			await api.setConfiguration({
+				apiProvider: "bedrock" as const,
+				awsUseApiKey: true,
+				awsApiKey: AWS_BEARER_TOKEN_BEDROCK,
+				awsRegion: BEDROCK_REGION,
+				apiModelId: BEDROCK_OPUS_48_MODEL_ID,
+			})
+		} else {
+			await api.setConfiguration({
+				apiProvider: "bedrock" as const,
+				awsUseApiKey: true,
+				awsApiKey: "mock-key",
+				awsRegion: BEDROCK_REGION,
+				apiModelId: BEDROCK_OPUS_48_MODEL_ID,
+				awsBedrockEndpoint: mockServer!.url,
+				awsBedrockEndpointEnabled: true,
+			})
+		}
+
+		const taskId = await api.startNewTask({
+			configuration: { mode: "ask", autoApprovalEnabled: true },
+			text: "bedrock-opus-48-smoke: what is 2+2? Reply with only the number.",
+		})
+
+		await waitUntilCompleted({ api, taskId })
+
+		if (mockServer) {
+			// The request reached the Bedrock endpoint (no 400 from temperature/thinking).
+			const userAgent = mockServer.lastRequestHeaders?.["user-agent"] as string | undefined
+			assert.ok(userAgent, "Bedrock request should include user-agent header")
+			assert.ok(userAgent.includes("ZooCode#"), `user-agent should contain "ZooCode#" — got: ${userAgent}`)
+		} else {
+			// Live mode: a successful round-trip proves 4.8 request formation works
+			// against real AWS Bedrock (adaptive thinking, no rejected sampling params).
+			assert.ok(true, "Task completed successfully via Bedrock with Claude Opus 4.8")
+		}
+	})
 })