refactor: drop legacy single-session default chat path

electron/ai-edition/chat-service.ts

@@ -579,44 +579,6 @@ function emptyDocumentForTextOnly(projectId: string): AxcutDocument {
 	return createEmptyDocument({ title: "Untitled project", projectId });
 }
 
-// ponytail: legacy single-session compatibility for the simpler ChatPanel
-// consumers. Picks the most recent session (or auto-creates one) so a stale
-// caller keeps working. The multi-session UI is the supported path.
-function getOrCreateDefaultSession(projectId: string): ChatSession {
-	const m = getProjectSessions(projectId);
-	if (m.size > 0) {
-		const arr = Array.from(m.values()).sort((a, b) => b.createdAt.localeCompare(a.createdAt));
-		return arr[0];
-	}
-	const created = createSession(projectId);
-	const s = m.get(created.id);
-	if (!s) throw new Error("Chat session unavailable.");
-	return s;
-}
-
-export async function runChatDefault(
-	projectId: string,
-	message: string,
-	llmConfig: LlmConfigStore,
-	sink?: ChatEventSink,
-): Promise<AiEditionChatResult> {
-	const session = getOrCreateDefaultSession(projectId);
-	return runChat(projectId, session.id, message, llmConfig, undefined, sink);
-}
-
-export function getDefaultChatHistory(projectId: string): AiEditionChatMessage[] {
-	const m = sessionsByProject.get(projectId);
-	if (!m || m.size === 0) return [];
-	const arr = Array.from(m.values()).sort((a, b) => b.createdAt.localeCompare(a.createdAt));
-	return [...arr[0].messages];
-}
-
-export function clearDefaultChatHistory(projectId: string): void {
-	const m = sessionsByProject.get(projectId);
-	if (!m) return;
-	for (const s of m.values()) s.messages = [];
-}
-
 // --- Compaction (P3.7) ---------------------------------------------------
 
 export interface SessionBudgetSnapshot {

electron/ipc/handlers.ts

@@ -36,17 +36,14 @@ import type {
 	ProjectPathResult,
 } from "../../src/native/contracts";
 import {
-	clearDefaultChatHistory,
 	compactSessionNow,
 	createSession,
 	deleteSession,
-	getDefaultChatHistory,
 	getSessionContextUsage,
 	listSessions,
 	renameSession,
 	rewindToMessage,
 	runChat,
-	runChatDefault,
 	selectSession,
 } from "../ai-edition/chat-service";
 import { DocumentService } from "../ai-edition/document-service";
@@ -3418,10 +3415,6 @@ export function registerIpcHandlers(
 		compactNow: (projectId, sessionId) =>
 			compactSessionNow(projectId, sessionId, aiEditionLlmConfig),
 		getContextUsage: getSessionContextUsage,
-		runAiEditionChatDefault: (projectId, message, sink) =>
-			runChatDefault(projectId, message, aiEditionLlmConfig, sink),
-		getAiEditionChatHistoryDefault: (projectId) => getDefaultChatHistory(projectId),
-		clearAiEditionChatHistoryDefault: (projectId) => clearDefaultChatHistory(projectId),
 		listAiEditionChatSessions: (projectId) => listSessions(projectId),
 		createAiEditionChatSession: (projectId, title) => createSession(projectId, title),
 		selectAiEditionChatSession: (projectId, sessionId) => selectSession(projectId, sessionId),

electron/ipc/nativeBridge.ts

@@ -83,15 +83,6 @@ export interface NativeBridgeContext {
 		projectId: string,
 		sessionId: string,
 	) => import("../../src/native/contracts").AiEditionChatBudget | null;
-	runAiEditionChatDefault: (
-		projectId: string,
-		message: string,
-		sink?: ChatEventSink,
-	) => Promise<import("../../src/native/contracts").AiEditionChatResult>;
-	getAiEditionChatHistoryDefault: (
-		projectId: string,
-	) => import("../../src/native/contracts").AiEditionChatMessage[];
-	clearAiEditionChatHistoryDefault: (projectId: string) => void;
 	listAiEditionChatSessions: (
 		projectId: string,
 	) => import("../../src/native/contracts").AiEditionChatSessionSummary[];
@@ -232,13 +223,10 @@ export function registerNativeBridgeHandlers(context: NativeBridgeContext) {
 		documents: context.getAiEditionDocuments(),
 		llmConfig: context.getAiEditionLlmConfig(),
 		runChat: context.runAiEditionChat,
-		runChatDefault: context.runAiEditionChatDefault,
 		undoLastToolBatch: context.undoAiEditionToolBatch,
 		rewindToMessage: context.rewindToMessage,
 		compactNow: context.compactNow,
 		getContextUsage: context.getContextUsage,
-		getDefaultChatHistory: context.getAiEditionChatHistoryDefault,
-		clearDefaultChatHistory: context.clearAiEditionChatHistoryDefault,
 		listSessions: context.listAiEditionChatSessions,
 		createSession: context.createAiEditionChatSession,
 		selectSession: context.selectAiEditionChatSession,
@@ -526,27 +514,6 @@ export function registerNativeBridgeHandlers(context: NativeBridgeContext) {
 									request.payload.sessionId,
 								),
 							);
-						case "chat.runDefault": {
-							const sink = buildChatEventSink(event.sender, "default");
-							return createSuccessResponse(
-								requestId,
-								await aiEditionService.chatRunDefault(
-									request.payload.projectId,
-									request.payload.message,
-									sink,
-								),
-							);
-						}
-						case "chat.history":
-							return createSuccessResponse(
-								requestId,
-								aiEditionService.chatHistoryDefault(request.payload.projectId),
-							);
-						case "chat.clear":
-							return createSuccessResponse(
-								requestId,
-								aiEditionService.chatClearDefault(request.payload.projectId),
-							);
 						case "chat.listSessions":
 							return createSuccessResponse(
 								requestId,

electron/native-bridge/services/aiEditionService.ts

@@ -42,11 +42,6 @@ export interface AiEditionServiceOptions {
 		document?: unknown,
 		sink?: ChatEventSink,
 	) => Promise<AiEditionChatResult>;
-	runChatDefault: (
-		projectId: string,
-		message: string,
-		sink?: ChatEventSink,
-	) => Promise<AiEditionChatResult>;
 	rewindToMessage: (
 		projectId: string,
 		sessionId: string,
@@ -67,8 +62,6 @@ export interface AiEditionServiceOptions {
 	// ponytail: legacy per-batch undo retired in favor of per-message rewind.
 	// Kept on the surface for IPC compatibility; always returns success=false.
 	undoLastToolBatch: (projectId: string, sessionId: string) => AiEditionChatResult;
-	getDefaultChatHistory: (projectId: string) => AiEditionChatMessage[];
-	clearDefaultChatHistory: (projectId: string) => void;
 	listSessions: (projectId: string) => AiEditionChatSessionSummary[];
 	createSession: (projectId: string, title?: string) => AiEditionChatSessionSummary;
 	selectSession: (projectId: string, sessionId: string) => AiEditionChatSession | null;
@@ -278,23 +271,6 @@ export class AiEditionService {
 		return this.options.compactNow(projectId, sessionId);
 	}
 
-	async chatRunDefault(
-		projectId: string,
-		message: string,
-		sink?: ChatEventSink,
-	): Promise<AiEditionChatResult> {
-		return this.options.runChatDefault(projectId, message, sink);
-	}
-
-	chatHistoryDefault(projectId: string): AiEditionChatMessage[] {
-		return this.options.getDefaultChatHistory(projectId);
-	}
-
-	chatClearDefault(projectId: string): { success: boolean } {
-		this.options.clearDefaultChatHistory(projectId);
-		return { success: true };
-	}
-
 	chatListSessions(projectId: string): AiEditionChatSessionSummary[] {
 		return this.options.listSessions(projectId);
 	}

src/native/browserShim.ts

@@ -471,52 +471,6 @@ function createShimBridgeClient() {
 					success: false,
 					error: "[browser-shim] No agent tool batches to undo in browser mode.",
 				}),
-			chatRunDefault: (projectId: string, message?: string) => {
-				// ponytail: legacy single-session consumers — pick the most
-				// recent session or auto-create one.
-				const sessions = getSessions(projectId);
-				let s = [...sessions.values()].sort((a, b) => b.createdAt.localeCompare(a.createdAt))[0];
-				if (!s) {
-					s = {
-						id: `sess_${Date.now()}`,
-						projectId,
-						title: "Conversation 1",
-						createdAt: new Date().toISOString(),
-						messages: [],
-					};
-					sessions.set(s.id, s);
-				}
-				if (message) {
-					s.messages.push({
-						id: `msg_${Date.now()}_u`,
-						role: "user",
-						content: message,
-						createdAt: new Date().toISOString(),
-					});
-				}
-				const assistantMessage = {
-					id: `msg_${Date.now()}_a`,
-					role: "assistant" as const,
-					content:
-						"[browser-shim] AI features need real LLM deps. Configure a provider in Settings, install the LangChain packages, then chat will work for real.",
-					createdAt: new Date().toISOString(),
-				};
-				s.messages.push(assistantMessage);
-				persistChat();
-				return Promise.resolve({ success: true, assistantMessage });
-			},
-			chatHistory: (projectId: string) => {
-				const m = sessionsByProject.get(projectId);
-				if (!m || m.size === 0) return Promise.resolve([]);
-				const arr = Array.from(m.values()).sort((a, b) => b.createdAt.localeCompare(a.createdAt));
-				return Promise.resolve([...arr[0].messages]);
-			},
-			chatClear: (projectId: string) => {
-				const m = sessionsByProject.get(projectId);
-				if (m) for (const s of m.values()) s.messages = [];
-				persistChat();
-				return Promise.resolve({ success: true });
-			},
 			chatListSessions: (projectId: string) => {
 				const m = sessionsByProject.get(projectId);
 				if (!m) return Promise.resolve([]);

src/native/client.ts

@@ -3,7 +3,6 @@ import {
 	type AiEditionCaptionTranslateResult,
 	type AiEditionChatBudget,
 	type AiEditionChatCompactResult,
-	type AiEditionChatMessage,
 	type AiEditionChatResult,
 	type AiEditionChatRewindResult,
 	type AiEditionChatSession,
@@ -231,50 +230,21 @@ export const nativeBridgeClient = {
 			}),
 		chatRun: (
 			projectId: string,
-			sessionIdOrMessage: string,
-			message?: string,
+			sessionId: string,
+			message: string,
 			document?: unknown,
-		): Promise<AiEditionChatResult> => {
-			// ponytail: polymorphic — legacy 2-arg callers pass (projectId, message).
-			// Multi-session callers pass (projectId, sessionId, message[, document]).
-			// The document snapshot enables the agent tool loop (P1).
-			if (message === undefined) {
-				return requireNativeBridgeData<AiEditionChatResult>({
-					domain: "aiEdition",
-					action: "chat.runDefault",
-					payload: { projectId, message: sessionIdOrMessage },
-				});
-			}
-			return requireNativeBridgeData<AiEditionChatResult>({
+		): Promise<AiEditionChatResult> =>
+			requireNativeBridgeData<AiEditionChatResult>({
 				domain: "aiEdition",
 				action: "chat.run",
-				payload: { projectId, sessionId: sessionIdOrMessage, message, document },
-			});
-		},
+				payload: { projectId, sessionId, message, document },
+			}),
 		chatUndoLastBatch: (projectId: string, sessionId: string) =>
 			requireNativeBridgeData<AiEditionChatResult>({
 				domain: "aiEdition",
 				action: "chat.undoLastBatch",
 				payload: { projectId, sessionId },
 			}),
-		chatRunDefault: (projectId: string, message: string) =>
-			requireNativeBridgeData<AiEditionChatResult>({
-				domain: "aiEdition",
-				action: "chat.runDefault",
-				payload: { projectId, message },
-			}),
-		chatHistory: (projectId: string) =>
-			requireNativeBridgeData<AiEditionChatMessage[]>({
-				domain: "aiEdition",
-				action: "chat.history",
-				payload: { projectId },
-			}),
-		chatClear: (projectId: string) =>
-			requireNativeBridgeData<{ success: boolean }>({
-				domain: "aiEdition",
-				action: "chat.clear",
-				payload: { projectId },
-			}),
 		chatListSessions: (projectId: string) =>
 			requireNativeBridgeData<AiEditionChatSessionSummary[]>({
 				domain: "aiEdition",

src/native/contracts.ts

@@ -533,24 +533,6 @@ export type NativeBridgeRequest =
 			payload: { projectId: string; sessionId: string };
 			requestId?: string;
 	  }
-	| {
-			domain: "aiEdition";
-			action: "chat.runDefault";
-			payload: { projectId: string; message: string };
-			requestId?: string;
-	  }
-	| {
-			domain: "aiEdition";
-			action: "chat.history";
-			payload: { projectId: string };
-			requestId?: string;
-	  }
-	| {
-			domain: "aiEdition";
-			action: "chat.clear";
-			payload: { projectId: string };
-			requestId?: string;
-	  }
 	| {
 			domain: "aiEdition";
 			action: "chat.listSessions";