feat: LLM intent router, direct chat execution, and Memory V2 light intervention

Wire chat intent routing with direct_chat on regular sessions, skill-selected
short-circuit to Agent, memory light/heavy intervention tiers, and fix direct
chat UI stuck streaming after completion.

Co-authored-by: Cursor <cursoragent@cursor.com>

tkmind-proxy.mjs

@@ -16,6 +16,10 @@ import { buildCurrentTimeAgentPrefix, buildTaskRoutingAgentText } from './user-m
 import { reconcileAgentSession } from './session-reconcile.mjs';
 import { createImgproxySigner } from './imgproxy-signer.mjs';
 import { isDirectChatSessionId } from './direct-chat-service.mjs';
+import {
+  memoryLimitForIntervention,
+  resolveMemoryInterventionMode,
+} from './memory-intervention.mjs';
 
 const insecureDispatcher = new Agent({
   connect: { rejectUnauthorized: false },
@@ -1078,19 +1082,31 @@ export function createTkmindProxy({
     };
   }
 
-  async function resolveUserMemories(userId, { sessionId = null, query = null, limit = 40 } = {}) {
+  async function resolveUserMemories(
+    userId,
+    { sessionId = null, query = null, limit = null, forceDeepReasoning = false, recallQuestion = false } = {},
+  ) {
     if (!userId) return [];
+    const intervention = resolveMemoryInterventionMode({
+      forceDeepReasoning,
+      recallQuestion,
+      context: 'agent',
+    });
+    const resolvedLimit = Number.isFinite(Number(limit)) && Number(limit) > 0
+      ? Number(limit)
+      : memoryLimitForIntervention(intervention, { context: 'agent' });
+    if (resolvedLimit <= 0) return [];
     if (memoryV2?.resolve) {
       const resolved = await memoryV2.resolve({
         userId,
         sessionId,
         query,
-        limit,
+        limit: resolvedLimit,
       }).catch(() => null);
       return Array.isArray(resolved?.memories) ? resolved.memories : [];
     }
     return conversationMemoryService?.listMemories
-      ? conversationMemoryService.listMemories(userId, { limit }).catch(() => [])
+      ? conversationMemoryService.listMemories(userId, { limit: resolvedLimit }).catch(() => [])
       : [];
   }
 
@@ -1140,7 +1156,7 @@ export function createTkmindProxy({
       }
     }
     const publishLayout = await userAuth.getUserPublishLayout(userId);
-    const userMemories = await resolveUserMemories(userId, { sessionId: session.id, limit: 40 });
+    const userMemories = await resolveUserMemories(userId, { sessionId: session.id });
     await reconcileAgentSession(
       (pathname, init) => apiFetch(startTarget, apiSecret, pathname, init),
       session.id,
@@ -1244,7 +1260,7 @@ export function createTkmindProxy({
   async function reconcileSessionPolicyForUser(
     userId,
     sessionId,
-    { toolMode = 'chat', query = null } = {},
+    { toolMode = 'chat', query = null, forceDeepReasoning = false } = {},
   ) {
     if (!userId || !sessionId) return;
     const target = await resolveTarget(sessionId);
@@ -1254,7 +1270,7 @@ export function createTkmindProxy({
     const userMemories = await resolveUserMemories(userId, {
       sessionId,
       query,
-      limit: 40,
+      forceDeepReasoning,
     });
     await reconcileAgentSession(
       (pathname, init) => apiFetch(target, apiSecret, pathname, init),
@@ -1282,7 +1298,7 @@ export function createTkmindProxy({
     sessionId,
     requestId,
     userMessage,
-    { toolMode = 'chat' } = {},
+    { toolMode = 'chat', forceDeepReasoning = false } = {},
   ) {
     if (!userId || !sessionId) throw new Error('缺少会话信息');
     const owns = await userAuth.ownsSession(userId, sessionId);
@@ -1298,6 +1314,7 @@ export function createTkmindProxy({
     await reconcileSessionPolicyForUser(userId, sessionId, {
       toolMode,
       query: firstUserText(userMessage),
+      forceDeepReasoning,
     });
     await applySessionLlmProvider(sessionId);
 
@@ -1432,7 +1449,6 @@ export function createTkmindProxy({
             const publishLayout = await userAuth.getUserPublishLayout(req.currentUser.id);
             const userMemories = await resolveUserMemories(req.currentUser.id, {
               sessionId: session.id,
-              limit: 40,
             });
             const api = (pathname, init) => apiFetch(startTarget, apiSecret, pathname, init);
             try {
@@ -1503,7 +1519,6 @@ export function createTkmindProxy({
             const publishLayout = await userAuth.getUserPublishLayout(req.currentUser.id);
             const userMemories = await resolveUserMemories(req.currentUser.id, {
               sessionId,
-              limit: 40,
             });
             try {
               await reconcileAgentSession(