feat(acp): implemented multi-session support with forking and lifecycle management

- Added multi-session support to ACP mode enabling session forking, resumption, and closure operations. - Added session model state reporting and unstable_setSessionModel RPC command for direct model configuration. - Added turn-level usage tracking and stable message ID tracking for assistant chunks in ACP responses. - Added Settings.cloneForCwd() method and ExtensionRunner.getFlagValues() for configuration isolation across sessions. - Fixed ACP session cleanup to properly cancel in-flight prompts and dispose resources on disconnect. - Refactored AcpAgent to manage multiple concurrent sessions with per-session lifecycle instead of single session.
2026-04-08 06:54:33 +02:00
parent 58c0d52679
commit 53c8d33758
9 changed files with 1083 additions and 167 deletions
@@ -0,0 +1,64 @@
+import { describe, expect, it } from "bun:test";
+import { mapAgentSessionEventToAcpSessionUpdates } from "../src/modes/acp/acp-event-mapper";
+import type { AgentSessionEvent } from "../src/session/agent-session";
+
+function makeAssistantMessage(text: string) {
+	return {
+		role: "assistant" as const,
+		content: [{ type: "text" as const, text }],
+		api: "anthropic-messages" as const,
+		provider: "anthropic" as const,
+		model: "claude-sonnet-4-20250514",
+		usage: {
+			input: 10,
+			output: 5,
+			cacheRead: 0,
+			cacheWrite: 0,
+			totalTokens: 15,
+			cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+		},
+		stopReason: "stop" as const,
+		timestamp: Date.now(),
+	};
+}
+
+function getChunkMessageId(event: { update: object }): string | undefined {
+	const update = event.update as { messageId?: string | null };
+	return typeof update.messageId === "string" ? update.messageId : undefined;
+}
+
+describe("ACP event mapper", () => {
+	it("attaches a stable messageId to live assistant chunks", () => {
+		const assistantMessage = makeAssistantMessage("chunk");
+		const getMessageId = (message: unknown): string | undefined =>
+			message === assistantMessage ? "a80f1ff7-4f0a-4e6b-9f09-c94857b62a4a" : undefined;
+
+		const textUpdates = mapAgentSessionEventToAcpSessionUpdates(
+			{
+				type: "message_update",
+				message: assistantMessage,
+				assistantMessageEvent: { type: "text_delta", delta: "chunk" },
+			} as AgentSessionEvent,
+			"session-1",
+			{ getMessageId },
+		);
+		const thoughtUpdates = mapAgentSessionEventToAcpSessionUpdates(
+			{
+				type: "message_update",
+				message: assistantMessage,
+				assistantMessageEvent: { type: "thinking_delta", delta: "plan" },
+			} as AgentSessionEvent,
+			"session-1",
+			{ getMessageId },
+		);
+
+		expect(textUpdates).toHaveLength(1);
+		expect(thoughtUpdates).toHaveLength(1);
+		expect(textUpdates[0] ? getChunkMessageId(textUpdates[0]) : undefined).toBe(
+			"a80f1ff7-4f0a-4e6b-9f09-c94857b62a4a",
+		);
+		expect(thoughtUpdates[0] ? getChunkMessageId(thoughtUpdates[0]) : undefined).toBe(
+			"a80f1ff7-4f0a-4e6b-9f09-c94857b62a4a",
+		);
+	});
+});