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<h1 id="核心架构"><a class="header" href="#核心架构">核心架构</a></h1>
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<p>大道 (Dao OS) 的架构，并非一个传统的、单体的操作系统。它是一个为实现主权、韧性和可扩展性而设计的、去中心化的分层范式。要理解它，必须理解它的三个基本实体：元单元、化身、以及道器。</p>
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<h2 id="1-元单元-meta-unit可移植的灵魂代码"><a class="header" href="#1-元单元-meta-unit可移植的灵魂代码">1. <code>元单元 (Meta Unit)</code>：可移植的“灵魂代码”</a></h2>
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<p><code>元单元</code>（以下简称为<code>元</code>）是用户数字存在的概念核心，但它本身不是一个运行中的程序。</p>
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<ul>
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<li><strong>其本质</strong>: <code>元</code>是一个<strong>可移植的库或制品 (Library/Artifact)</strong>，例如一个 <code>.wasm</code>、<code>.so</code> 或 <code>.dll</code> 文件。它包含了用户完整的、端到端加密的“第二大脑”（所有数据）、核心服务API（身份、P2P网络、AI基础设施）以及管理它们的逻辑。</li>
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<li><strong>其角色</strong>: 它是被动的、统一的、唯一的“事实来源”，定义了用户的核心数据与能力。就像 Java 的字节码 (<code>.class</code> 文件)一样，它定义了“能做什么”，但它自己不“做”。它是等待被激活的“精密机器”。</li>
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</ul>
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<h2 id="2-化身-avatar元的运行时环境"><a class="header" href="#2-化身-avatar元的运行时环境">2. <code>化身 (Avatar)</code>：<code>元</code>的“运行时环境”</a></h2>
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<p><code>化身</code>是赋予<code>元</code>生命的“能动”实体。</p>
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<ul>
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<li><strong>其本质</strong>: <code>化身</code>是任何一个<strong>可执行的程序或进程</strong>，其核心职责是加载、承载并执行一个<code>元</code>的实例。它是激活“机器”的“能源”。</li>
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<li><strong>其角色</strong>: <code>化身</code>扮演着连接抽象的<code>元</code>与具体的宿主平台（iOS、Windows、浏览器、命令行）之间的关键<strong>桥梁</strong>。它为<code>元</code>提供访问系统资源（CPU、内存、存储、网络）的通道。在 Java 的比喻中，<code>化身</code>就是 <strong>JVM (Java虚拟机)</strong>。</li>
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<li><strong>大道网络</strong>: 用户所有正在运行的<code>化身</code>都会组成一个私有的P2P网络，以保持其内嵌的<code>元</code>实例时刻无缝同步。</li>
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</ul>
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<h2 id="3-道器-dao-implement生态系统中的软件"><a class="header" href="#3-道器-dao-implement生态系统中的软件">3. <code>道器 (Dao Implement)</code>：生态系统中的软件</a></h2>
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<p>“道器”是为所有与“大道”生态集成、并扩展其能力的第三方软件所设定的通用术语。它们是用户实际交互的应用和服务。一个<code>道器</code>通过集成<code>元</code>而成为一个<code>化身</code>。</p>
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<p>一个<code>道器</code>并非单一类型，而是根据其设计，由不同类型的组件构成。</p>
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<ul>
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<li><strong><code>器 (Facet Component)</code></strong>: 这是一个<code>道器</code>中，拥有<strong>用户界面</strong>的部分。它是<code>元</code>这台机器的“控制面板”，负责向用户呈现信息和捕获用户输入。</li>
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<li><strong><code>核 (Core Component)</code></strong>: 这是一个<code>道器</code>中，<strong>无界面、负责后台逻辑</strong>的部分。它作为一个服务运行，提供特定的能力来增强<code>元</code>或被其他<code>道器</code>调用。它是机器的“外挂工具”。</li>
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</ul>
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<h3 id="架构的自由"><a class="header" href="#架构的自由">架构的自由</a></h3>
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<p>开发者在构建他的<code>道器</code>时，拥有完全的架构自由：</p>
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<ul>
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<li>他可以创建一个<strong>单体式独立应用</strong>，这个应用本身就是一个<code>化身</code>，将<code>元</code>库、一个<code>核</code>（用于逻辑）和一个<code>器</code>（用于UI）打包在一个可执行文件中。</li>
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<li>他可以创建一个<strong>分布式应用</strong>，让一个<code>器</code>在一个设备上，与另一个设备上的<code>核</code>进行通信。</li>
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<li>他可以只创建一个纯粹的**<code>核</code>**（一个“扩展”），仅仅为用户的整个“大道”提供一种新的后台能力。</li>
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<li>他也可以只创建一个纯粹的**<code>器</code>**，它没有任何自定义的后端逻辑（<code>核</code>），其界面直接调用<code>元</code>本身提供的核心服务（如“第二大脑”）来构建一个简单的工具应用。</li>
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</ul>
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<p>这套架构确保了“大道”不仅是一个平台，更是一个真正开放的、可组合的、去中心化的生态系统。</p>
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