Hunter Lovell (hntrl) · Sep 6, 2026 · Sep 6, 2026 · Sep 6, 2026
diff --git a/.changeset/omit-middleware-trace-inputs.md b/.changeset/omit-middleware-trace-inputs.md
@@ -0,0 +1,10 @@
+---
+"deepagents": patch
+"@langchain/quickjs": patch
+---
+
+fix(middleware): omit repeated conversation and state inputs from owned middleware lifecycle traces
+
+Keep middleware spans and outputs, and preserve model/tool tracing and user-supplied middleware policies. Apply the defaults to standalone middleware, subagents, and QuickJS cleanup. Lifecycle chain events also receive the omitted inputs.
+
+Require LangChain 1.5.11-rc.0 and LangGraph 1.4.15-rc.0 or newer for middleware trace-policy support. QuickJS now declares its LangChain peer requirement explicitly.
diff --git a/libs/deepagents/package.json b/libs/deepagents/package.json
@@ -46,7 +46,7 @@
   "devDependencies": {
     "@langchain/anthropic": "^1.5.0",
     "@langchain/core": "^1.2.9",
-    "@langchain/langgraph": "^1.4.10",
+    "@langchain/langgraph": "^1.4.15-rc.0",
     "@langchain/langgraph-checkpoint": "^1.1.5",
     "@langchain/langgraph-sdk": "^1.9.23",
     "@langchain/openai": "^1.5.1",
@@ -58,7 +58,7 @@
     "@vitest/coverage-v8": "^4.0.18",
     "@vitest/ui": "^4.0.18",
     "dotenv": "^17.2.4",
-    "langchain": "^1.5.10",
+    "langchain": "^1.5.11-rc.0",
     "tsdown": "^0.22.1",
     "tsx": "^4.21.0",
     "typescript": "^7.0.2",
@@ -100,10 +100,10 @@
   },
   "peerDependencies": {
     "@langchain/core": "^1.2.9",
-    "@langchain/langgraph": "^1.4.10",
+    "@langchain/langgraph": "^1.4.15-rc.0",
     "@langchain/langgraph-checkpoint": "^1.1.5",
     "@langchain/langgraph-sdk": "^1.9.23",
-    "langchain": "^1.5.10",
+    "langchain": "^1.5.11-rc.0",
     "langsmith": ">=0.7.1 <0.10.0"
   },
   "files": [

diff --git a/libs/deepagents/src/middleware/agent-memory.ts b/libs/deepagents/src/middleware/agent-memory.ts
@@ -35,6 +35,7 @@ import fs from "node:fs";
 import { z } from "zod";
 import {
   createMiddleware,
+  omitPayload,
   /**
    * required for type inference
    */
@@ -236,6 +237,7 @@ export function createAgentMemoryMiddleware(
 
   return createMiddleware({
     name: "AgentMemoryMiddleware",
+    tracePolicy: { processInputs: omitPayload },
     stateSchema: AgentMemoryStateSchema as any,
 
     beforeAgent(state: any) {

diff --git a/libs/deepagents/src/middleware/async_subagents.ts b/libs/deepagents/src/middleware/async_subagents.ts
@@ -2,6 +2,7 @@ import { Command, ReducedValue, StateSchema } from "@langchain/langgraph";
 import { Client, type DefaultValues, type Run } from "@langchain/langgraph-sdk";
 import {
   createMiddleware,
+  omitPayload,
   tool,
   ToolMessage,
   SystemMessage,
@@ -875,6 +876,7 @@ export function createAsyncSubAgentMiddleware(
 
   return createMiddleware({
     name: "asyncSubAgentMiddleware",
+    tracePolicy: { processInputs: omitPayload },
     stateSchema: AsyncTaskStateSchema,
     tools,
     wrapModelCall: async (request, handler) => {

diff --git a/libs/deepagents/src/middleware/cache.ts b/libs/deepagents/src/middleware/cache.ts
@@ -1,4 +1,4 @@
-import { createMiddleware, SystemMessage } from "langchain";
+import { createMiddleware, omitPayload, SystemMessage } from "langchain";
 
 /**
  * Import langchain for type inference
@@ -36,6 +36,7 @@ import { isAnthropicModel } from "../utils.js";
 export function createCacheBreakpointMiddleware() {
   return createMiddleware({
     name: "CacheBreakpointMiddleware",
+    tracePolicy: { processInputs: omitPayload },
 
     wrapModelCall(request, handler) {
       // Per-call provider gate: the boot-time install gate in createDeepAgent

diff --git a/libs/deepagents/src/middleware/completion_callback.ts b/libs/deepagents/src/middleware/completion_callback.ts
@@ -78,6 +78,7 @@
 import * as z from "zod";
 import {
   createMiddleware,
+  omitPayload,
   /**
    * required for type inference
    */
@@ -303,6 +304,7 @@ export function createCompletionCallbackMiddleware(
 
   return createMiddleware({
     name: "CompletionCallbackMiddleware",
+    tracePolicy: { processInputs: omitPayload },
     stateSchema: CompletionCallbackStateSchema,
 
     /**

diff --git a/libs/deepagents/src/middleware/fs.ts b/libs/deepagents/src/middleware/fs.ts
@@ -9,6 +9,7 @@
 import {
   context,
   createMiddleware,
+  omitPayload,
   tool,
   HumanMessage,
   ToolMessage,
@@ -2019,6 +2020,7 @@ export function createFilesystemMiddleware(
 
   return createMiddleware({
     name: "FilesystemMiddleware",
+    tracePolicy: { processInputs: omitPayload },
     stateSchema: FilesystemStateSchema,
     tools: allTools,
     async beforeAgent(state) {

diff --git a/libs/deepagents/src/middleware/memory.ts b/libs/deepagents/src/middleware/memory.ts
@@ -52,6 +52,7 @@ import { z } from "zod";
 import {
   context,
   createMiddleware,
+  omitPayload,
   SystemMessage,
   /**
    * required for type inference
@@ -287,6 +288,7 @@ export function createMemoryMiddleware(options: MemoryMiddlewareOptions) {
 
   return createMiddleware({
     name: "MemoryMiddleware",
+    tracePolicy: { processInputs: omitPayload },
     stateSchema: MemoryStateSchema,
 
     async beforeAgent(state) {

diff --git a/libs/deepagents/src/middleware/patch_tool_calls.ts b/libs/deepagents/src/middleware/patch_tool_calls.ts
@@ -1,5 +1,6 @@
 import {
   createMiddleware,
+  omitPayload,
   ToolMessage,
   AIMessage,
   /**
@@ -134,6 +135,7 @@ export function patchDanglingToolCalls(messages: BaseMessage[]): {
 export function createPatchToolCallsMiddleware() {
   return createMiddleware({
     name: "patchToolCallsMiddleware",
+    tracePolicy: { processInputs: omitPayload },
     beforeAgent: async (state) => {
       const messages = state.messages;
 

diff --git a/libs/deepagents/src/middleware/skills.ts b/libs/deepagents/src/middleware/skills.ts
@@ -45,6 +45,7 @@ import yaml from "yaml";
 import {
   context,
   createMiddleware,
+  omitPayload,
   /**
    * required for type inference
    */
@@ -820,6 +821,7 @@ export function createSkillsMiddleware(options: SkillsMiddlewareOptions) {
 
   return createMiddleware({
     name: "SkillsMiddleware",
+    tracePolicy: { processInputs: omitPayload },
     stateSchema: SkillsStateSchema,
 
     async beforeAgent(state) {

diff --git a/libs/deepagents/src/middleware/subagents.ts b/libs/deepagents/src/middleware/subagents.ts
@@ -2,6 +2,7 @@ import { z } from "zod/v4";
 
 import {
   createMiddleware,
+  omitPayload,
   createAgent,
   AgentMiddleware,
   tool,
@@ -469,6 +470,7 @@ function createForkTaskToolMiddleware(
 ): AgentMiddleware {
   return createMiddleware({
     name: "forkTaskToolMiddleware",
+    tracePolicy: { processInputs: omitPayload },
     stateSchema: ForkedContextStateSchema,
     tools: [taskTool],
     beforeAgent: () => ({ [FORKED_CONTEXT_KEY]: true }),
@@ -1003,6 +1005,7 @@ export function createSubAgentMiddleware(options: SubAgentMiddlewareOptions) {
 
   return createMiddleware({
     name: "subAgentMiddleware",
+    tracePolicy: { processInputs: omitPayload },
     tools: [taskTool],
     wrapModelCall: async (request, handler) => {
       if (systemPrompt !== null) {

diff --git a/libs/deepagents/src/middleware/summarization.ts b/libs/deepagents/src/middleware/summarization.ts
@@ -43,6 +43,7 @@
 import { z } from "zod";
 import {
   createMiddleware,
+  omitPayload,
   countTokensApproximately,
   HumanMessage,
   AIMessage,
@@ -1182,6 +1183,7 @@ export function createSummarizationMiddleware(
 
   return createMiddleware({
     name: "SummarizationMiddleware",
+    tracePolicy: { processInputs: omitPayload },
     stateSchema: SummarizationStateSchema,
 
     async wrapModelCall(request, handler) {

diff --git a/libs/deepagents/src/middleware/tool_exclusion.ts b/libs/deepagents/src/middleware/tool_exclusion.ts
@@ -1,5 +1,5 @@
 import { ToolMessage } from "@langchain/core/messages";
-import { createMiddleware, type AgentMiddleware } from "langchain";
+import { createMiddleware, omitPayload, type AgentMiddleware } from "langchain";
 
 function hasToolName(tool: unknown): tool is { name: string } {
   return (
@@ -22,6 +22,7 @@ export function createToolExclusionMiddleware(
 ): AgentMiddleware {
   return createMiddleware({
     name: "_ToolExclusionMiddleware",
+    tracePolicy: { processInputs: omitPayload },
     wrapModelCall(request, handler) {
       return handler({
         ...request,