feat: add pre-compaction memory flush

src/agents/pi-embedded-runner.ts

@@ -73,7 +73,10 @@ import {
 import { normalizeModelCompat } from "./model-compat.js";
 import { ensureClawdbotModelsJson } from "./models-config.js";
 import type { MessagingToolSend } from "./pi-embedded-messaging.js";
-import { ensurePiCompactionReserveTokens } from "./pi-settings.js";
+import {
+  ensurePiCompactionReserveTokens,
+  resolveCompactionReserveTokensFloor,
+} from "./pi-settings.js";
 import { acquireSessionWriteLock } from "./session-write-lock.js";
 
 export type { MessagingToolSend } from "./pi-embedded-messaging.js";
@@ -1184,7 +1187,12 @@ export async function compactEmbeddedPiSession(params: {
             effectiveWorkspace,
             agentDir,
           );
-          ensurePiCompactionReserveTokens({ settingsManager });
+          ensurePiCompactionReserveTokens({
+            settingsManager,
+            minReserveTokens: resolveCompactionReserveTokensFloor(
+              params.config,
+            ),
+          });
           const additionalExtensionPaths = buildEmbeddedExtensionPaths({
             cfg: params.config,
             sessionManager,
@@ -1584,7 +1592,12 @@ export async function runEmbeddedPiAgent(params: {
             effectiveWorkspace,
             agentDir,
           );
-          ensurePiCompactionReserveTokens({ settingsManager });
+          ensurePiCompactionReserveTokens({
+            settingsManager,
+            minReserveTokens: resolveCompactionReserveTokensFloor(
+              params.config,
+            ),
+          });
           const additionalExtensionPaths = buildEmbeddedExtensionPaths({
             cfg: params.config,
             sessionManager,