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feat: implement client-side tools via client_tools spec (#456)

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Co-authored-by: Letta <noreply@letta.com>
This commit is contained in:
Charles Packer
2026-01-02 23:35:40 -08:00
committed by GitHub
parent 5ad51d7095
commit 34367de5d7
14 changed files with 181 additions and 1157 deletions
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15
src/agent/create.ts
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@@ -8,7 +8,6 @@ import type {
AgentType,
} from "@letta-ai/letta-client/resources/agents/agents";
import { DEFAULT_AGENT_NAME } from "../constants";
import { getToolNames } from "../tools/manager";
import { getClient } from "./client";
import { getDefaultMemoryBlocks } from "./memory";
import {
@@ -126,13 +125,11 @@ export async function createAgent(
const client = await getClient();
// Get loaded tool names (tools are already registered with Letta)
// Map internal names to server names so the agent sees the correct tool names
const { getServerToolName } = await import("../tools/manager");
const internalToolNames = getToolNames();
const serverToolNames = internalToolNames.map((n) => getServerToolName(n));
const baseMemoryTool = modelHandle.startsWith("openai/gpt-5")
// Only attach server-side tools to the agent.
// Client-side tools (Read, Write, Bash, etc.) are passed via client_tools at runtime,
// NOT attached to the agent. This is the new pattern - no more stub tool registration.
const { isOpenAIModel } = await import("../tools/manager");
const baseMemoryTool = isOpenAIModel(modelHandle)
? "memory_apply_patch"
: "memory";
const defaultBaseTools = options.baseTools ?? [
@@ -142,7 +139,7 @@ export async function createAgent(
"fetch_webpage",
];
let toolNames = [...serverToolNames, ...defaultBaseTools];
let toolNames = [...defaultBaseTools];
// Fallback: if server doesn't have memory_apply_patch, use legacy memory tool
if (toolNames.includes("memory_apply_patch")) {