fix(deps): drop swift-sdk fork branch for official tagged release

Package.swift

@@ -21,13 +21,12 @@ let package = Package(
         .executable(name: "occtmcp-server", targets: ["OCCTMCPServer"]),
     ],
     dependencies: [
-        // Temporary pin against gsdali's swift-sdk fork while
-        // modelcontextprotocol/swift-sdk#226 is in review. Upstream
-        // tag floor goes back to `from: "0.11.0"` once the PR merges.
-        // The branch ships `Value.numberValue` (proposed in upstream
-        // #225) — Server.swift consumes it directly so we delete our
-        // own back-port the moment upstream lands.
-        .package(url: "https://github.com/gsdali/swift-sdk.git", branch: "add-value-numbervalue"),
+        // Official MCP Swift SDK. `Value.numberValue` (proposed upstream
+        // in modelcontextprotocol/swift-sdk#225, PR #226) is not yet in a
+        // tagged release, so we back-port it locally in
+        // Sources/OCCTMCPCore/Value+NumberValue.swift. Delete that file
+        // and nothing else changes once the SDK ships the property.
+        .package(url: "https://github.com/modelcontextprotocol/swift-sdk.git", from: "0.11.0"),
         // OCCT 8.0.0 GA cohort.
         //
         // OCCTSwift 1.1.0 closes gsdali/OCCTSwift#167: TopologyGraph

Sources/OCCTMCPCore/Value+NumberValue.swift

@@ -0,0 +1,24 @@
+import MCP
+
+extension Value {
+    /// Back-port of the upstream `Value.numberValue` proposed in
+    /// modelcontextprotocol/swift-sdk#225 (PR #226), pending a tagged
+    /// release of the official SDK.
+    ///
+    /// JSON has a single `number` type with no integer/float distinction,
+    /// and `Value.init(from:)` tries `Int` first — so `Value.double(0)`
+    /// round-trips through JSON to `Value.int(0)` and `doubleValue` returns
+    /// `nil`. This accessor coerces both `.int` and `.double` to `Double`,
+    /// which is what tool-argument readers want for coordinates, dimensions,
+    /// tolerances, and angles. Returns `nil` for any non-numeric case.
+    ///
+    /// Remove this file once the SDK ships `numberValue` upstream; no other
+    /// code changes are required.
+    var numberValue: Double? {
+        switch self {
+        case .int(let value):    return Double(value)
+        case .double(let value): return value
+        default:                 return nil
+        }
+    }
+}