chore(deps-dev): bump typescript from 5.8.3 to 6.0.3

TypeScript 6.0 enforces stricter function parameter variance. Fixes:
- cast typed event handlers to (...args: unknown[]) => void at register
  call sites in CrossSignalRuleEngine (no eslint-disable needed since
  the casts are genuinely required by the new strictness)
- add `as unknown as` double-cast for RegExpExecArray→tuple in
  static-scanner.ts (TS6 no longer allows direct narrowing cast)
- cast fs[method] to FsMethod at both set/createPatch call sites
- change diagnostics_channel listeners in tests from typed parameter
  to unknown and cast inside (ChannelListener now requires unknown)
- fix process.stderr.write mock spread in expiry-signal.test.ts

Author: sharon77242

package.json

@@ -27,7 +27,7 @@
     "husky": "^9.1.7",
     "jiti": "^2.4.2",
     "prettier": "^3.8.3",
-    "typescript": "^5.8.3",
+    "typescript": "^6.0.3",
     "typescript-eslint": "^8.59.1"
   }
 }

packages/agent/package.json

@@ -79,7 +79,7 @@
     "eslint": "^10.3.0",
     "jiti": "^2.4.2",
     "prettier": "^3.8.3",
-    "typescript": "^5.8.3",
+    "typescript": "^6.0.3",
     "typescript-eslint": "^8.59.1"
   },
   "dependencies": {

packages/agent/src/analysis/cross-signal-rule-engine.ts

@@ -182,10 +182,10 @@ export class CrossSignalRuleEngine {
       });
     };
 
-    this.register("query", onQuery);
-    this.register("http", onHttp);
-    this.register("slow-query", onSlowQuery);
-    this.register("pool-exhaustion", onPoolExhaustion);
+    this.register("query", onQuery as (...args: unknown[]) => void);
+    this.register("http", onHttp as (...args: unknown[]) => void);
+    this.register("slow-query", onSlowQuery as (...args: unknown[]) => void);
+    this.register("pool-exhaustion", onPoolExhaustion as (...args: unknown[]) => void);
 
     // R.7 hot-path-select-star
     if (this.opts.columnUsageDir) {
@@ -235,7 +235,7 @@ export class CrossSignalRuleEngine {
           });
       };
 
-      this.register("query", onQueryForColUsage);
+      this.register("query", onQueryForColUsage as (...args: unknown[]) => void);
     }
   }
 

packages/agent/src/analysis/explain-analyzer.ts

@@ -95,7 +95,7 @@ export class ExplainAnalyzer extends EventEmitter {
         timestamp: now,
       } satisfies ExplainResult);
     } catch (err) {
-      this.emit("error", err as Error);
+      this.emit("error", err);
     }
   }
 

packages/agent/src/analysis/static-scanner.ts

@@ -499,7 +499,7 @@ export class StaticScanner extends EventEmitter {
 
     let match;
     while ((match = regex.exec(output)) !== null) {
-      const [, filePath, line, col, , code, message] = match as [
+      const [, filePath, line, col, , code, message] = match as unknown as [
         string,
         string,
         string,

packages/agent/src/instrumentation/drivers/patch-utils.ts

@@ -118,9 +118,9 @@ export function wrapMethod(
           error: err ?? undefined,
           cacheHit,
         } satisfies PatchedQueryMessage);
-        return originalCallback.call(this, err, ...cbArgs) as unknown;
+        return originalCallback.call(this, err, ...cbArgs);
       };
-      return original.apply(this, args) as unknown;
+      return original.apply(this, args);
     }
 
     const result = original.apply(this, args);

packages/agent/src/instrumentation/fs.ts

@@ -56,8 +56,11 @@ export class FsInstrumentation extends EventEmitter {
 
       for (const method of methodsToPatch) {
         if (typeof fs[method] === "function" && !this.originalMethods.has(method)) {
-          this.originalMethods.set(method, fs[method]);
-          (fs as Record<string, unknown>)[method] = this.createPatch(method, fs[method]);
+          this.originalMethods.set(method, fs[method] as FsMethod);
+          (fs as Record<string, unknown>)[method] = this.createPatch(
+            method,
+            fs[method] as FsMethod,
+          );
         }
       }
 

packages/agent/src/instrumentation/http.ts

@@ -156,7 +156,7 @@ export class HttpInstrumentation extends EventEmitter {
     (http as Record<string, unknown>).request = (
       ...args: Parameters<typeof http.request>
     ): http.ClientRequest => {
-      const req = origHttp.apply(http, args) as http.ClientRequest;
+      const req = origHttp.apply(http, args);
       const { method, url } = parseArgs("http:", args[0]);
       this._trackClientRequest(req, method, url, performance.now());
       return req;
@@ -168,7 +168,7 @@ export class HttpInstrumentation extends EventEmitter {
     (https as Record<string, unknown>).request = (
       ...args: Parameters<typeof https.request>
     ): http.ClientRequest => {
-      const req = origHttps.apply(https, args) as http.ClientRequest;
+      const req = origHttps.apply(https, args);
       const { method, url } = parseArgs("https:", args[0]);
       this._trackClientRequest(req, method, url, performance.now());
       return req;

packages/agent/tests/instrumentation/drivers-grpc.test.ts

@@ -38,7 +38,7 @@ function collectMessages(fn: () => void | Promise<void>): Promise<PatchedQueryMe
   return new Promise(async (resolve) => {
     const ch = diagnostics_channel.channel(AUTO_PATCH_CHANNEL);
     const messages: PatchedQueryMessage[] = [];
-    const listener = (msg: PatchedQueryMessage) => messages.push(msg);
+    const listener = (msg: unknown) => messages.push(msg as PatchedQueryMessage);
     ch.subscribe(listener);
     try {
       await fn();

packages/agent/tests/instrumentation/drivers-mock.test.ts

@@ -35,7 +35,7 @@ function collectMessages(fn: () => void | Promise<void>): Promise<PatchedQueryMe
   return new Promise(async (resolve) => {
     const ch = diagnostics_channel.channel(AUTO_PATCH_CHANNEL);
     const messages: PatchedQueryMessage[] = [];
-    const listener = (msg: PatchedQueryMessage) => messages.push(msg);
+    const listener = (msg: unknown) => messages.push(msg as PatchedQueryMessage);
     ch.subscribe(listener);
     try {
       await fn();