fix(core): correct WAAPI rediscovery seek baselines and preview reuse invalidation

packages/cli/src/server/portUtils.ts

@@ -99,6 +99,7 @@ interface HyperframesConfigResponse {
   isHyperframes: boolean;
   projectName: string;
   projectDir: string;
+  serverBuildSignature?: string | null;
   version: string;
 }
 
@@ -114,6 +115,7 @@ export type DetectionResult =
 export function detectHyperframesServer(
   port: number,
   normalizedProjectDir: string,
+  expectedServerBuildSignature: string | null = null,
 ): Promise<DetectionResult> {
   return new Promise<DetectionResult>((resolveResult) => {
     const req = http.get(
@@ -152,6 +154,12 @@ export function detectHyperframesServer(
             const normalize = (p: string) => resolve(p).replace(/\\/g, "/").toLowerCase();
 
             if (normalize(json.projectDir) === normalizedProjectDir) {
+              if (
+                expectedServerBuildSignature !== null &&
+                json.serverBuildSignature !== expectedServerBuildSignature
+              ) {
+                return resolveResult({ type: "mismatch", projectName: json.projectName });
+              }
               return resolveResult({ type: "match" });
             }
 
@@ -327,6 +335,7 @@ export async function findPortAndServe(
   startPort: number,
   projectDir: string,
   forceNew: boolean,
+  expectedServerBuildSignature: string | null = null,
 ): Promise<FindPortResult> {
   const { createAdaptorServer } = await import("@hono/node-server");
   const normalizedDir = resolve(projectDir).replace(/\\/g, "/").toLowerCase();
@@ -366,7 +375,11 @@ export async function findPortAndServe(
 
     // Port is occupied — probe for existing HyperFrames instance
     if (!forceNew) {
-      const detection = await detectHyperframesServer(port, normalizedDir);
+      const detection = await detectHyperframesServer(
+        port,
+        normalizedDir,
+        expectedServerBuildSignature,
+      );
       if (detection.type === "match") {
         return { type: "already-running", port };
       }