Cleaned dead code and updated documents

MIZAN.md

@@ -1,14 +1,19 @@
 # MIZAN — Named Contexts & Mutation Architecture
 
+> **Historical design spec.** The original named-contexts / mutation design
+> document from the January 2025 design conversation. Kept as a record of design
+> intent, not as a description of the current build — names and surfaces here
+> predate the implementation (the codegen is the Rust binary
+> `protocol/mizan-codegen`, never shipped under the working name "Maison"). For
+> current architecture, read `CLAUDE.md` (wire protocol, package layout, codegen
+> state) and `docs/` (`AFI_ARCHITECTURE.md`, `SSR_ARCHITECTURE.md`,
+> `CACHE_KEYING.md`, `MWT_SPEC.md`).
+
 ## For Claude Code
 
 This plan was written by Ryth's Claude.ai session after an extended design conversation
 reviewing the full codebase, the original @compose discussion from January 2025, and
-several rounds of architectural refinement. Treat this as the spec.
-
-The framework formerly called mizan is now called **MIZAN**. Package names, imports,
-and references should be updated accordingly. The internal codegen engine is called
-**Maison** — it lives inside Mizan and does not need its own public surface.
+several rounds of architectural refinement.
 
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