Add get_messages RPC command

packages/coding-agent/src/modes/rpc/rpc-client.ts

@@ -6,7 +6,7 @@
 
 import { type ChildProcess, spawn } from "node:child_process";
 import * as readline from "node:readline";
-import type { AgentEvent, Attachment, ThinkingLevel } from "@mariozechner/pi-agent-core";
+import type { AgentEvent, AppMessage, Attachment, ThinkingLevel } from "@mariozechner/pi-agent-core";
 import type { CompactionResult, SessionStats } from "../../core/agent-session.js";
 import type { BashResult } from "../../core/bash-executor.js";
 import type { RpcCommand, RpcResponse, RpcSessionState } from "./rpc-types.js";
@@ -326,6 +326,14 @@ export class RpcClient {
 		return this.getData<{ text: string | null }>(response).text;
 	}
 
+	/**
+	 * Get all messages in the session.
+	 */
+	async getMessages(): Promise<AppMessage[]> {
+		const response = await this.send({ type: "get_messages" });
+		return this.getData<{ messages: AppMessage[] }>(response).messages;
+	}
+
 	// =========================================================================
 	// Helpers
 	// =========================================================================

packages/coding-agent/src/modes/rpc/rpc-mode.ts

@@ -227,6 +227,14 @@ export async function runRpcMode(session: AgentSession): Promise<never> {
 				return success(id, "get_last_assistant_text", { text });
 			}
 
+			// =================================================================
+			// Messages
+			// =================================================================
+
+			case "get_messages": {
+				return success(id, "get_messages", { messages: session.messages });
+			}
+
 			default: {
 				const unknownCommand = command as { type: string };
 				return error(undefined, unknownCommand.type, `Unknown command: ${unknownCommand.type}`);

packages/coding-agent/src/modes/rpc/rpc-types.ts

@@ -5,7 +5,7 @@
  * Responses and events are emitted as JSON lines on stdout.
  */
 
-import type { Attachment, ThinkingLevel } from "@mariozechner/pi-agent-core";
+import type { AppMessage, Attachment, ThinkingLevel } from "@mariozechner/pi-agent-core";
 import type { CompactionResult, SessionStats } from "../../core/agent-session.js";
 import type { BashResult } from "../../core/bash-executor.js";
 
@@ -49,7 +49,10 @@ export type RpcCommand =
 	| { id?: string; type: "switch_session"; sessionPath: string }
 	| { id?: string; type: "branch"; entryIndex: number }
 	| { id?: string; type: "get_branch_messages" }
-	| { id?: string; type: "get_last_assistant_text" };
+	| { id?: string; type: "get_last_assistant_text" }
+
+	// Messages
+	| { id?: string; type: "get_messages" };
 
 // ============================================================================
 // RPC State
@@ -146,6 +149,9 @@ export type RpcResponse =
 			data: { text: string | null };
 	  }
 
+	// Messages
+	| { id?: string; type: "response"; command: "get_messages"; success: true; data: { messages: AppMessage[] } }
+
 	// Error response (any command can fail)
 	| { id?: string; type: "response"; command: string; success: false; error: string };