fix: isolate skills blocks per conversation (#545)

Co-authored-by: Letta <noreply@letta.com>

bun.lock

@@ -4,7 +4,7 @@
     "": {
       "name": "@letta-ai/letta-code",
       "dependencies": {
-        "@letta-ai/letta-client": "1.6.5",
+        "@letta-ai/letta-client": "1.6.6",
         "glob": "^13.0.0",
         "ink-link": "^5.0.0",
         "open": "^10.2.0",
@@ -36,7 +36,7 @@
 
     "@isaacs/brace-expansion": ["@isaacs/brace-expansion@5.0.0", "", { "dependencies": { "@isaacs/balanced-match": "^4.0.1" } }, "sha512-ZT55BDLV0yv0RBm2czMiZ+SqCGO7AvmOM3G/w2xhVPH+te0aKgFjmBvGlL1dH+ql2tgGO3MVrbb3jCKyvpgnxA=="],
 
-    "@letta-ai/letta-client": ["@letta-ai/letta-client@1.6.5", "", {}, "sha512-LrJz7xqqYXaoAC6XXUZ/K+YgrCLzoEIRwPCXoOsiN/ehl7hl9kiz1Mw/iYSCK7ZpXS6fnyaIbIwGfxWeCl8z5g=="],
+    "@letta-ai/letta-client": ["@letta-ai/letta-client@1.6.6", "", {}, "sha512-kD0x5SvUrSSLLG3aF0wcXp6iA52UxyEXPA+kr9LV7PLhLwys5pYC00QWflvHmPB5MPnnmYA9oBaEbP3SHIEv/w=="],
 
     "@types/bun": ["@types/bun@1.3.1", "", { "dependencies": { "bun-types": "1.3.1" } }, "sha512-4jNMk2/K9YJtfqwoAa28c8wK+T7nvJFOjxI4h/7sORWcypRNxBpr+TPNaCfVWq70tLCJsqoFwcf0oI0JU/fvMQ=="],
 

package.json

@@ -30,7 +30,7 @@
     "access": "public"
   },
   "dependencies": {
-    "@letta-ai/letta-client": "1.6.5",
+    "@letta-ai/letta-client": "1.6.6",
     "glob": "^13.0.0",
     "ink-link": "^5.0.0",
     "open": "^10.2.0"

src/agent/memory.ts

@@ -39,6 +39,13 @@ export type MemoryBlockLabel = (typeof MEMORY_BLOCK_LABELS)[number];
  */
 export const READ_ONLY_BLOCK_LABELS = ["skills", "loaded_skills"] as const;
 
+/**
+ * Block labels that should be isolated per-conversation.
+ * When creating a conversation, these blocks are copied from the agent's blocks
+ * to create conversation-specific versions, preventing cross-conversation state pollution.
+ */
+export const ISOLATED_BLOCK_LABELS = ["skills", "loaded_skills"] as const;
+
 /**
  * Check if a block label is a project-level block
  */

src/cli/App.tsx

@@ -37,6 +37,7 @@ import { getResumeData } from "../agent/check-approval";
 import { getClient } from "../agent/client";
 import { getCurrentAgentId, setCurrentAgentId } from "../agent/context";
 import { type AgentProvenance, createAgent } from "../agent/create";
+import { ISOLATED_BLOCK_LABELS } from "../agent/memory";
 import { sendMessageStream } from "../agent/message";
 import { getModelDisplayName, getModelInfo } from "../agent/model";
 import { SessionStats } from "../agent/stats";
@@ -2893,6 +2894,7 @@ export default function App({
         // User can /resume to get back to a previous conversation if needed
         const newConversation = await client.conversations.create({
           agent_id: targetAgentId,
+          isolated_block_labels: [...ISOLATED_BLOCK_LABELS],
         });
         const targetConversationId = newConversation.id;
 
@@ -3936,6 +3938,7 @@ export default function App({
             // Create a new conversation for the current agent
             const conversation = await client.conversations.create({
               agent_id: agentId,
+              isolated_block_labels: [...ISOLATED_BLOCK_LABELS],
             });
 
             // Update conversationId state
@@ -4008,6 +4011,7 @@ export default function App({
             // Also create a new conversation since messages were cleared
             const conversation = await client.conversations.create({
               agent_id: agentId,
+              isolated_block_labels: [...ISOLATED_BLOCK_LABELS],
             });
             setConversationId(conversation.id);
             settingsManager.setLocalLastSession(
@@ -7554,6 +7558,7 @@ Plan file path: ${planFilePath}`;
                     const client = await getClient();
                     const conversation = await client.conversations.create({
                       agent_id: agentId,
+                      isolated_block_labels: [...ISOLATED_BLOCK_LABELS],
                     });
                     setConversationId(conversation.id);
                     settingsManager.setLocalLastSession(

src/headless.ts

@@ -15,6 +15,7 @@ import {
 import { getClient } from "./agent/client";
 import { initializeLoadedSkillsFlag, setAgentContext } from "./agent/context";
 import { createAgent } from "./agent/create";
+import { ISOLATED_BLOCK_LABELS } from "./agent/memory";
 import { sendMessageStream } from "./agent/message";
 import { getModelUpdateArgs } from "./agent/model";
 import { SessionStats } from "./agent/stats";
@@ -446,6 +447,7 @@ export async function handleHeadlessCommand(
   // This ensures isolated message history per CLI invocation
   const conversation = await client.conversations.create({
     agent_id: agent.id,
+    isolated_block_labels: [...ISOLATED_BLOCK_LABELS],
   });
   const conversationId = conversation.id;
 

src/index.ts

@@ -6,6 +6,7 @@ import { getResumeData, type ResumeData } from "./agent/check-approval";
 import { getClient } from "./agent/client";
 import { initializeLoadedSkillsFlag, setAgentContext } from "./agent/context";
 import type { AgentProvenance } from "./agent/create";
+import { ISOLATED_BLOCK_LABELS } from "./agent/memory";
 import { LETTA_CLOUD_API_URL } from "./auth/oauth";
 import type { ApprovalRequest } from "./cli/helpers/stream";
 import { ProfileSelectionInline } from "./cli/profile-selection";
@@ -1331,6 +1332,7 @@ async function main(): Promise<void> {
             // No valid session to resume for this agent, create new
             const conversation = await client.conversations.create({
               agent_id: agent.id,
+              isolated_block_labels: [...ISOLATED_BLOCK_LABELS],
             });
             conversationIdToUse = conversation.id;
           }
@@ -1339,6 +1341,7 @@ async function main(): Promise<void> {
           // This ensures each CLI session has isolated message history
           const conversation = await client.conversations.create({
             agent_id: agent.id,
+            isolated_block_labels: [...ISOLATED_BLOCK_LABELS],
           });
           conversationIdToUse = conversation.id;
         }