fix(coding-agent): restore compaction summary and dedupe edit errors

packages/coding-agent/src/core/tools/edit.ts

@@ -215,7 +215,14 @@ function formatEditResult(
 			.filter((c) => c.type === "text")
 			.map((c) => c.text || "")
 			.join("\n");
-		return errorText ? `\n${theme.fg("error", errorText)}` : undefined;
+		let previewError: string | undefined;
+		if (state.preview && "error" in state.preview) {
+			previewError = state.preview.error;
+		}
+		if (!errorText || errorText === previewError) {
+			return undefined;
+		}
+		return `\n${theme.fg("error", errorText)}`;
 	}
 
 	const previewDiff = state.preview && !("error" in state.preview) ? state.preview.diff : undefined;

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

@@ -57,7 +57,7 @@ import type {
 } from "../../core/extensions/index.js";
 import { FooterDataProvider, type ReadonlyFooterDataProvider } from "../../core/footer-data-provider.js";
 import { type AppKeybinding, KeybindingsManager } from "../../core/keybindings.js";
-
+import { createCompactionSummaryMessage } from "../../core/messages.js";
 import { findExactModelReferenceMatch, resolveModelScope } from "../../core/model-resolver.js";
 import { DefaultPackageManager } from "../../core/package-manager.js";
 import type { ResourceDiagnostic } from "../../core/resource-loader.js";
@@ -2438,6 +2438,13 @@ export class InteractiveMode {
 				} else if (event.result) {
 					this.chatContainer.clear();
 					this.rebuildChatFromMessages();
+					this.addMessageToChat(
+						createCompactionSummaryMessage(
+							event.result.summary,
+							event.result.tokensBefore,
+							new Date().toISOString(),
+						),
+					);
 					this.footer.invalidate();
 				} else if (event.errorMessage) {
 					if (event.reason === "manual") {