this is a bad idea

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "wash"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "wash"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/main.rs

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+use std::io;
+use std::io::Write;
+
+fn main() {
+    let stdin = io::stdin();
+    let mut stdout = io::stdout();
+
+    let mut line = String::new();
+    loop {
+        match stdin.read_line(&mut line) {
+            Ok(_) => {
+                if let Err(_) = stdout.write(b"ok\n") {
+                    break;
+                }
+            }
+            Err(_) => break,
+        }
+    }
+}