设计决策

docs/DECISIONS.md 回答**“Entelechy 为什么是这样而不是别的样子”**——代码中看不出来的原因。每一条都是在架构文档边界内做出的裁决，在被按名字替换之前一直有效：选择、原因、以及代码在哪里保证它（Where）。

下表是全部 32 条的索引（中文为本文档的意译，以英文原文为准）。

#	决策	原文
1	图计算结构，从不计算值	The Graph computes structure, never values
2	Host 约束工作量与内存	The Host bounds work and memory
3	运行时计数的循环整体运行；预算约束它	A loop counted at run time runs whole; the budget bounds it
4	函数永远不会到达自己；它在文档中的位置是自由的	A function never reaches itself; its place in the document is free
5	一个表达式在每个后端上只有一个答案	One expression has one answer on every backend
6	group 的各 lane 在 exchange 处相遇	A group’s lanes meet at exchanges
7	一帧只运行有人读取的部分；check 说明运行会做什么	A frame runs what something reads; a check says what running would
8	节点可以按某一行的值休眠	A node may sleep by what a row says
9	语言只因所有者的决定而增长	The language grows only by the owner’s word
10	遍历输入的 Kernel 要说出它的名字	A Kernel that walks an input names it
11	公共契约只增长；只随版本破坏	A public contract grows; it breaks only with its version
12	来源归加载器；名字归语言	Sources are the loader’s; names are the language’s
13	Entelechy 用它所执行的表描述自己	Entelechy describes itself, from the tables it enforces
14	有两个所有者的规则收归一个	A rule that had two owners is held to one
15	Kernel 的效果是 Host 在提交后执行的数据	A Kernel’s effects are data the Host carries out after a commit
16	世界可以编写自己的定律	A world may write its own laws
17	served 场景能接触到的，就是运行它的人给出的	What a served scene reaches is what the person running it gave
18	场景从 Host 世界读取的，是输入或节点	What a scene reads of the Host’s world is an input or a node
19	现实原子地改变；历史记录原因	Reality changes atomically; history records why
20	运行中的世界通过三扇门改变，各有各的粒度	A live world is changed through three doors, each at its own grain
21	“播放一个场景”的含义只决定一次	What playing a scene means is decided once
22	场景说出输出或输入对接的 Host 设备	The scene names the Host device an output or input meets
23	指针由 Kernel 绘制、由系统显示	The pointer is drawn by a Kernel and shown by the system
24	回放就是测试；框架测试自己	A replay is a test; the framework tests itself
25	平台是 Host 的世界；场景计算什么与平台无关	A platform is the Host’s world; what a scene computes is not
26	光栅化器是一个包；原生光栅化器是它的快速路径	The rasterizer is a package; the native one is its fast path
27	运行去哪里由后端决定；它计算什么不由后端决定	Where a run goes is the backend’s; what it computes is not
28	修改在帧之外准备；无效的东西从不发布	A change prepares off the frames; nothing invalid publishes
29	只在答案相同处节省工作	Work is spared only where the answer is the same
30	包用函数、Kernel、图预设和数据说话	A package speaks in functions, Kernels, graph presets and data
31	一个词因探针写不出而进入	A word enters by what a probe could not write
32	表格中的文本是该行中的码点数组	A table’s text is an array of codes in its row

手册中引用了其中多条：图与状态（1、8）、后端（5、27）、能力与安全（17）、热替换（19、20、28）、回放测试（24）、包（30、31）。