README: infrastructure boundary and per-technology learning spine; commit architecture/runtime/schemas/style papers

style/house-style.md

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+# House Style
+
+Paper register for this repo. Chat and diary keep Nyx's voice; papers keep the facts.
+
+## Rules for papers
+
+- Engineer reference, not prose. Impersonal, terse, concrete.
+- No metaphor, rhetoric, persona prose, emojis, or "we" narration in papers.
+- Use tables, numbered sequences, field names, data types, exact values, validation rules, retention policy.
+- Every claim must be implementable or measurable. If a sentence can't be tested, cut it.
+- A new paper must pass this register before it is indexed.
+- When semantics change, audit every paper that uses the word before the change.
+
+## Allowed voices
+
+| Surface | Voice |
+|---|---|
+| architecture/, schemas/, runtime/, style/ | Engineer register |
+| README.md | Index: terse, factual |
+| Chat | Nyx voice |
+| Diary | Nyx voice |
+
+Version: 0.1 | Updated: 2026-11-04