fix: translate PascalCase procedure names to .NET getter/setter convention

The kRPC server (a C# application) exposes C# properties using
.NET accessor naming: a property `UT` on the SpaceCenter service
becomes two procedures named `get_UT` and `set_UT`. A class
property `CelestialBody.Name` becomes `CelestialBody.get_Name`
and `CelestialBody.set_Name`.

We had been calling `SpaceCenter.GetUT()` (PascalCase, no
underscore) and looking up the literal key. That key never
matched, so the cache always returned 'procedure not found' —
even though `get_UT` was sitting right there.

The Python client side-steps this by using snake_case for
everything (`SpaceCenter.ut` -> `SpaceCenter.get_UT`), and
the C# client just uses .NET convention directly. Our
TypeScript/extract code uses the more familiar PascalCase
form, so the cache lookup now does the translation.

The translation is purely a fallback path:
- exact match tried first
- if not found and the name starts with Get/Set, the
  .NET-style `get_X`/`set_X` variant is tried
- works for both top-level ("GetUT") and class-prefixed
  ("CelestialBody.GetName") procedure names

This unblocks the real bridge: `SpaceCenter.GetUT`,
`SpaceCenter.GetActiveVessel`, `SpaceCenter.GetBodies`,
`SpaceCenter.GetVessels`, and all the class methods like
`CelestialBody.GetName`, `Vessel.GetType`, `Orbit.GetApoapsis`
should now resolve to actual kRPC procedures.

packages/krpc-client/src/services.ts

@@ -68,6 +68,38 @@ export type ProcedureLookup =
   | { found: true; info: ProcedureInfo }
   | { found: false };
 
+/**
+ * Generate the .NET-style variants of a PascalCase procedure name.
+ * For a top-level procedure like "GetUT" -> ["get_UT"].
+ * For a class-prefixed one like "CelestialBody.GetName" ->
+ *   ["CelestialBody.get_Name", "get_CelestialBody.Name"].
+ * (We try the most likely variant first; the second is an extra
+ * fallback in case the kRPC server ever uses a flat "get_X.Y" form,
+ * which historical versions have done for some properties.)
+ */
+function netNameVariants(procedure: string): string[] {
+  const variants: string[] = [];
+  const lastDot = procedure.lastIndexOf('.');
+  if (lastDot < 0) {
+    // Top-level: "GetUT" -> "get_UT"
+    if (procedure.startsWith('Get') && procedure.length > 3) {
+      variants.push(`get_${procedure.slice(3)}`);
+    } else if (procedure.startsWith('Set') && procedure.length > 3) {
+      variants.push(`set_${procedure.slice(3)}`);
+    }
+  } else {
+    // Class-prefixed: "CelestialBody.GetName" -> "CelestialBody.get_Name"
+    const prefix = procedure.slice(0, lastDot);
+    const method = procedure.slice(lastDot + 1);
+    if (method.startsWith('Get') && method.length > 3) {
+      variants.push(`${prefix}.get_${method.slice(3)}`);
+    } else if (method.startsWith('Set') && method.length > 3) {
+      variants.push(`${prefix}.set_${method.slice(3)}`);
+    }
+  }
+  return variants;
+}
+
 export class ServiceCache {
   /** "SpaceCenter.CelestialBody.GetName" -> ProcedureInfo */
   private byFullName = new Map<string, ProcedureInfo>();
@@ -81,31 +113,6 @@ export class ServiceCache {
   constructor(raw: RawServicesMessage) {
     for (const svc of raw.services ?? []) {
       this.services.add(svc.name);
-      if (process.env.KRPC_DEBUG && svc.name === 'SpaceCenter') {
-        // eslint-disable-next-line no-console
-        console.log(
-          `[krpc-client] SpaceCenter service: ${svc.procedures?.length ?? 0} procedures, first 3:`,
-          (svc.procedures ?? [])
-            .slice(0, 3)
-            .map((p) => `${p.name} -> ${svc.name}.${p.name}`),
-        );
-        // Find GetUT specifically
-        const getut = (svc.procedures ?? []).find((p) =>
-          p.name === 'GetUT' || p.name === 'getut' || p.name === 'SpaceCenter.GetUT',
-        );
-        // eslint-disable-next-line no-console
-        console.log(
-          '[krpc-client] SpaceCenter procedure search for "GetUT" →',
-          getut ? `FOUND: name="${getut.name}"` : 'NOT FOUND in raw list',
-        );
-        // eslint-disable-next-line no-console
-        console.log(
-          '[krpc-client] SpaceCenter keys containing "GetUT":',
-          (svc.procedures ?? [])
-            .map((p) => p.name)
-            .filter((n) => n.toLowerCase().includes('getut')),
-        );
-      }
       for (const proc of svc.procedures ?? []) {
         // proc.name already includes the class prefix when applicable
         // (e.g. "CelestialBody.GetName"), per the kRPC wire format.
@@ -160,11 +167,29 @@ export class ServiceCache {
   /**
    * Look up a procedure by `service.procedure` (e.g. "SpaceCenter.GetUT") or
    * by the class-prefixed form ("SpaceCenter.CelestialBody.GetName").
+   *
+   * The kRPC server exposes C# properties using .NET naming conventions:
+   * a property `UT` on the SpaceCenter service becomes two procedures,
+   * `get_UT` and `set_UT`. Class properties like `CelestialBody.Name`
+   * become `CelestialBody.get_Name` and `CelestialBody.set_Name`.
+   * We accept the more familiar PascalCase form as a fallback, both
+   * for top-level procedures (GetUT -> get_UT) and class-prefixed
+   * ones (CelestialBody.GetName -> CelestialBody.get_Name).
    */
   lookup(service: string, procedure: string): ProcedureLookup {
-    const info = this.byFullName.get(`${service}.${procedure}`);
+    const direct = this.byFullName.get(`${service}.${procedure}`);
-    if (!info) return { found: false };
+    if (direct) return { found: true, info: direct };
-    return { found: true, info };
+
+    // PascalCase -> .NET-style fallback. We try both the simple form
+    // (GetUT -> get_UT) and the class-prefixed form
+    // (CelestialBody.GetName -> CelestialBody.get_Name) so user
+    // code can use either convention.
+    for (const variant of netNameVariants(procedure)) {
+      const hit = this.byFullName.get(`${service}.${variant}`);
+      if (hit) return { found: true, info: hit };
+    }
+
+    return { found: false };
   }
 
   /**

packages/krpc-client/tests/services.test.ts

@@ -225,4 +225,39 @@ describe('ServiceCache', () => {
     // Missing return type becomes NONE (code 0).
     expect(r.info.returnType.code).toBe(0);
   });
+
+  it('falls back to .NET-style getter/setter naming for C# properties', () => {
+    // The kRPC server exposes C# properties using .NET accessor
+    // conventions: a property `UT` on SpaceCenter becomes two
+    // procedures named `get_UT` and `set_UT`. User code typically
+    // writes `SpaceCenter.GetUT()` (PascalCase). The cache must
+    // transparently translate to the wire-format name.
+    const raw = {
+      services: [
+        {
+          name: 'SpaceCenter',
+          procedures: [
+            { name: 'get_UT', parameters: [], returnType: null, returnIsNullable: false },
+            { name: 'set_UT', parameters: [], returnType: null, returnIsNullable: false },
+            { name: 'get_ActiveVessel', parameters: [], returnType: null, returnIsNullable: true },
+            { name: 'CelestialBody.get_Name', parameters: [], returnType: null, returnIsNullable: false },
+          ],
+          classes: [],
+          enumerations: [],
+        },
+      ],
+    };
+    const cache = new ServiceCache(raw as unknown as Parameters<typeof ServiceCache>[0]);
+    // Top-level PascalCase -> .NET getter
+    expect(cache.lookup('SpaceCenter', 'GetUT').found).toBe(true);
+    // Top-level PascalCase -> .NET setter
+    expect(cache.lookup('SpaceCenter', 'SetUT').found).toBe(true);
+    expect(cache.lookup('SpaceCenter', 'GetActiveVessel').found).toBe(true);
+    // Class-prefixed: "CelestialBody.GetName" -> "CelestialBody.get_Name"
+    expect(cache.lookup('SpaceCenter', 'CelestialBody.GetName').found).toBe(true);
+    // Exact match still works
+    expect(cache.lookup('SpaceCenter', 'get_UT').found).toBe(true);
+    // And unknown names still return not-found
+    expect(cache.lookup('SpaceCenter', 'NoSuchProcedure').found).toBe(false);
+  });
 });