fix: address additional review feedback for built-in REPL

- Use cross-platform PID: std.c.getpid() on POSIX, GetCurrentProcessId() on Windows
- Resolve .load command paths relative to process.cwd()
- Remove empty placeholder test file

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/cli/repl_command.zig

@@ -9,7 +9,10 @@ pub const ReplCommand = struct {
         const temp_dir = bun.fs.FileSystem.RealFS.platformTempDir();
 
         // Create unique temp file name with PID to avoid collisions
-        const pid = std.os.linux.getpid();
+        const pid = if (bun.Environment.isWindows)
+            std.os.windows.GetCurrentProcessId()
+        else
+            std.c.getpid();
         var temp_path_buf: [bun.MAX_PATH_BYTES]u8 = undefined;
         const temp_path = std.fmt.bufPrint(&temp_path_buf, "{s}/bun-repl-{d}.ts", .{ temp_dir, pid }) catch {
             Output.prettyErrorln("<r><red>error<r>: Could not create temp path", .{});

src/js/eval/repl.ts

@@ -192,7 +192,9 @@ const replCommands: Record<string, { help: string; action: (args: string) => voi
         return;
       }
       try {
-        const code = fs.readFileSync(filename.trim(), "utf-8");
+        // Resolve relative paths against the user's current working directory
+        const resolvedPath = path.resolve(process.cwd(), filename.trim());
+        const code = fs.readFileSync(resolvedPath, "utf-8");
         const result = evaluateCode(code);
         if (result !== undefined) {
           console.log(formatResult(result));

test/cli/install/bun-repl.test.ts

@@ -1,10 +0,0 @@
-// Tests for `bun repl` functionality are in test/regression/issue/26058.test.ts
-// This file is kept for backwards compatibility but the main tests are in the regression folder
-
-import { describe, test } from "bun:test";
-
-describe("bun repl", () => {
-  test.skip("moved to test/regression/issue/26058.test.ts", () => {
-    // REPL tests have been consolidated in the regression test file
-  });
-});