feat(condense): tune default pruning policy

extensions/condense-config.ts

@@ -3,12 +3,25 @@ import { dirname, join } from "node:path";
 
 export type CondenseDefaultResult = "updated" | "unchanged" | "skipped-invalid";
 
+const CONDENSE_BUNDLE_DEFAULTS = {
+	enabled: true,
+	pruneOn: "agent-message",
+	batchingMode: "turn",
+	autoBudgetThreshold: 0.735,
+	budgetTurnDelta: 0.04,
+	summarizerModel: "default",
+	summarizerThinking: "default",
+	summarizerIdleTimeoutMs: 90_000,
+	summarizerMaxTimeoutMs: 300_000,
+	quietOversizedSkips: false,
+} as const;
+
 function isObject(value: unknown): value is Record<string, unknown> {
 	return value !== null && typeof value === "object" && !Array.isArray(value);
 }
 
-/** Enable pi-condense only when the user has not already chosen an enabled state. */
-export function ensureCondenseEnabledDefault(agentDir: string): CondenseDefaultResult {
+/** Fill missing pi-condense settings with bundle defaults while preserving every explicit user choice. */
+export function ensureCondenseDefaults(agentDir: string): CondenseDefaultResult {
 	const targetPath = join(agentDir, "settings.json");
 	let settings: Record<string, unknown> = {};
 
@@ -22,9 +35,12 @@ export function ensureCondenseEnabledDefault(agentDir: string): CondenseDefaultR
 
 	const existing = settings.contextPrune;
 	if (existing !== undefined && !isObject(existing)) return "skipped-invalid";
-	if (isObject(existing) && Object.hasOwn(existing, "enabled")) return "unchanged";
 
-	settings.contextPrune = { ...(existing ?? {}), enabled: true };
+	const contextPrune = existing ?? {};
+	const alreadyComplete = Object.keys(CONDENSE_BUNDLE_DEFAULTS).every((key) => Object.hasOwn(contextPrune, key));
+	if (alreadyComplete) return "unchanged";
+
+	settings.contextPrune = { ...CONDENSE_BUNDLE_DEFAULTS, ...contextPrune };
 	mkdirSync(dirname(targetPath), { recursive: true });
 	const temporaryPath = `${targetPath}.my-pi.tmp`;
 	writeFileSync(temporaryPath, `${JSON.stringify(settings, null, 2)}\n`, "utf8");