fix: reasoning iMessage sessions + final reply (#655) (thanks @antons)

CHANGELOG.md

@@ -7,6 +7,7 @@
 - Onboarding/Gateway: persist non-interactive gateway token auth in config; add WS wizard + gateway tool-calling regression coverage.
 - CLI: `clawdbot sessions` now includes `elev:*` + `usage:*` flags in the table output.
 - Branding: normalize user-facing “ClawdBot”/“CLAWDBOT” → “Clawdbot” (CLI, status, docs).
+- iMessage: fix reasoning persistence across DMs; avoid partial/duplicate replies when reasoning is enabled. (#655) — thanks @antons.
 - Models/Auth: allow MiniMax API configs without `models.providers.minimax.apiKey` (auth profiles / `MINIMAX_API_KEY`). (#656) — thanks @mneves75.
 
 ## 2026.1.9

src/agents/pi-embedded-subscribe.test.ts

@@ -370,7 +370,15 @@ describe("subscribeEmbeddedPiSession", () => {
       message: { role: "assistant" },
       assistantMessageEvent: {
         type: "text_delta",
-        delta: "Final answer",
+        delta: "Final ",
+      },
+    });
+    handler?.({
+      type: "message_update",
+      message: { role: "assistant" },
+      assistantMessageEvent: {
+        type: "text_delta",
+        delta: "answer",
       },
     });
     handler?.({

src/config/sessions.test.ts

@@ -111,6 +111,8 @@ describe("sessions", () => {
             updatedAt: 123,
             systemSent: true,
             thinkingLevel: "low",
+            responseUsage: "on",
+            queueDebounceMs: 1234,
             reasoningLevel: "on",
             elevatedLevel: "on",
             authProfileOverride: "auth-1",
@@ -135,6 +137,8 @@ describe("sessions", () => {
     expect(store[mainSessionKey]?.updatedAt).toBeGreaterThanOrEqual(123);
     expect(store[mainSessionKey]?.lastProvider).toBe("telegram");
     expect(store[mainSessionKey]?.lastTo).toBe("12345");
+    expect(store[mainSessionKey]?.responseUsage).toBe("on");
+    expect(store[mainSessionKey]?.queueDebounceMs).toBe(1234);
     expect(store[mainSessionKey]?.reasoningLevel).toBe("on");
     expect(store[mainSessionKey]?.elevatedLevel).toBe("on");
     expect(store[mainSessionKey]?.authProfileOverride).toBe("auth-1");

src/config/sessions.ts

@@ -487,38 +487,11 @@ export async function updateLastRoute(params: {
   const store = loadSessionStore(storePath);
   const existing = store[sessionKey];
   const now = Date.now();
+  const sessionId = existing?.sessionId ?? crypto.randomUUID();
   const next: SessionEntry = {
-    sessionId: existing?.sessionId ?? crypto.randomUUID(),
+    ...(existing ?? { sessionId, updatedAt: 0 }),
+    sessionId,
     updatedAt: Math.max(existing?.updatedAt ?? 0, now),
-    sessionFile: existing?.sessionFile,
-    systemSent: existing?.systemSent,
-    abortedLastRun: existing?.abortedLastRun,
-    spawnedBy: existing?.spawnedBy,
-    thinkingLevel: existing?.thinkingLevel,
-    verboseLevel: existing?.verboseLevel,
-    reasoningLevel: existing?.reasoningLevel,
-    elevatedLevel: existing?.elevatedLevel,
-    providerOverride: existing?.providerOverride,
-    modelOverride: existing?.modelOverride,
-    authProfileOverride: existing?.authProfileOverride,
-    groupActivation: existing?.groupActivation,
-    groupActivationNeedsSystemIntro: existing?.groupActivationNeedsSystemIntro,
-    sendPolicy: existing?.sendPolicy,
-    queueMode: existing?.queueMode,
-    inputTokens: existing?.inputTokens,
-    outputTokens: existing?.outputTokens,
-    totalTokens: existing?.totalTokens,
-    modelProvider: existing?.modelProvider,
-    model: existing?.model,
-    contextTokens: existing?.contextTokens,
-    compactionCount: existing?.compactionCount,
-    displayName: existing?.displayName,
-    chatType: existing?.chatType,
-    provider: existing?.provider,
-    subject: existing?.subject,
-    room: existing?.room,
-    space: existing?.space,
-    skillsSnapshot: existing?.skillsSnapshot,
     lastProvider: provider,
     lastTo: to?.trim() ? to.trim() : undefined,
     lastAccountId: accountId?.trim()