Latest states

protocol/mizan-codegen/scripts/run_decoru.py

@@ -27,7 +27,11 @@ from pathlib import Path
 
 from pydantic import BaseModel  # type: ignore[import-untyped]
 
-from decoru import emit_rust_struct, walk_pydantic_model  # type: ignore[import-untyped]
+from decoru import (  # type: ignore[import-untyped]
+    emit_rust_struct,
+    to_rust_variant_ident,
+    walk_pydantic_model,
+)
 
 
 def _declared_in(module, obj) -> bool:
@@ -56,10 +60,6 @@ def discover_enums(module) -> list[type[Enum]]:
     ]
 
 
-def _pascal_case(s: str) -> str:
-    return "".join(part.capitalize() for part in s.split("_") if part)
-
-
 # Last-variant-is-default matches the catch-all idiom (e.g. `Metadata`
 # in `claude_manage.schema.EntryType`). Decoru's `emit_rust_struct`
 # emits `impl Default` unconditionally on every BaseModel, so any
@@ -76,7 +76,10 @@ _ENUM_TEMPLATE = textwrap.dedent("""\
 
 
 def _render_variant(member: Enum, *, is_default: bool) -> str:
-    pascal = _pascal_case(member.name)
+    # Pascal-casing the Python member name is the same conversion decoru
+    # applies when capturing enum field defaults. Sharing the function is
+    # load-bearing — divergent conversions emit non-compiling schema.rs.
+    pascal = to_rust_variant_ident(member.name)
     default_attr = "    #[default]\n" if is_default else ""
     return f"{default_attr}    {pascal},"