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Letta Code Memory Architecture Deep Dive

A comprehensive technical breakdown of how memory works in Letta Code

Table of Contents

1. Overview
2. Philosophy: Session-Based vs Agent-Based
3. Memory Block Architecture
4. System Architecture Diagram

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Playwright MCP Context Optimization Guide

This document describes how to reduce context overflow when using Playwright MCP with LLMs. A single tool call can produce 400k+ tokens due to ads, trackers, cookie banners, and verbose page snapshots. These optimizations can reduce that by 80-90%.

Problem Statement

Playwright MCP returns full page snapshots (accessibility tree in YAML format) after every action. This causes:

• Token overflow: 400k+ tokens per tool call on complex pages
• Wasted context: Ads, trackers, cookie banners inflate content
• Unnecessary data: Most actions don't need the resulting snapshot

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Formal Definition: Hybrid Semantic-Dimensional Similarity

1. Preliminaries: The Embedding Space

Let $\mathcal{T}$ be the set of all possible text inputs. We define a pre-trained embedding function $E$ that maps text to a $d$-dimensional vector space $\mathbb{R}^d$.

$$ E: \mathcal{T} \to \mathbb{R}^d $$

For any text input $x \in \mathcal{T}$, its vector representation is $\mathbf{v}_x = E(x)$. We assume the standard measure of semantic distance in this space is Cosine Similarity.

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defmodule EventStore do
  @moduledoc """
  - Resilient disk_log handling with automatic repair
  - Batch writing for better performance
  - Automatic log file maintenance
  - Monitoring and metrics
  - Quick recovery after crashes
  """

  use GenServer

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#!/usr/bin/env bash
# Requires direnv: https://direnv.net/

# Check if this is a devcontainer project
if [[ ! -f .devcontainer/devcontainer.json ]] && [[ ! -f devcontainer.json ]]; then
  return # Not a devcontainer project, do nothing
fi

if ! command -v devpod >/dev/null 2>&1; then
  return # devpod not available, do nothing

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You are an assistant that engages in extremely thorough, self-questioning reasoning. Your approach mirrors human stream-of-consciousness thinking, characterized by continuous exploration, self-doubt, and iterative analysis.

## Core Principles

1. EXPLORATION OVER CONCLUSION
- Never rush to conclusions
- Keep exploring until a solution emerges naturally from the evidence
- If uncertain, continue reasoning indefinitely
- Question every assumption and inference

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defmodule MCP.Types do
  @moduledoc """
  Core types for the Model Context Protocol (MCP).
  """
  use TypedStruct

  defmodule RequestId do
    @type t :: String.t() | integer()
  end

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import { Observable, Scheduler } from 'rxjs';
import { Subscription } from 'rxjs';
import { Action } from 'rxjs/internal/scheduler/Action';

export function arrRemove<T>(arr: T[] | undefined | null, item: T) {
  if (arr) {
    const index = arr.indexOf(item);
    0 <= index && arr.splice(index, 1);
  }
}

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/* Main font family customization for core UI elements */
.monaco-workbench *:not(.codicon) {
  font-family: 'IBM Plex Mono', monospace !important;
}

/* Set specific font size for list elements */
.monaco-list-row,
.monaco-list-rows {
  font-size: 12px;
}

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package main

import (
	"context"
	"fmt"
	"log"
	"time"

	"internal/config"