diff --git a/apps/cli/tests/helpers/cli.ts b/apps/cli/tests/helpers/cli.ts
index 7a853d1976..56b7d0a229 100644
--- a/apps/cli/tests/helpers/cli.ts
+++ b/apps/cli/tests/helpers/cli.ts
@@ -393,17 +393,43 @@ export function spawnSupabase(
     closeWaiters.clear();
   });
 
+  let stdinError: unknown;
   if (options?.stdin !== undefined && proc.stdin) {
+    proc.stdin.on("error", (error) => {
+      if (!("code" in error && error.code === "EPIPE")) {
+        stdinError = error;
+      }
+    });
     proc.stdin.write(options.stdin);
     proc.stdin.end();
   }
 
+  const stdinFailure = (result: RunResult) =>
+    new Error(
+      [
+        `stdin write to the CLI failed`,
+        `Command: supabase ${args.join(" ")}`,
+        `PID: ${proc.pid ?? "<unknown>"}`,
+        `exit code: ${result.exitCode}${
+          result.timedOutAfterMs === undefined
+            ? ""
+            : ` (no exit within ${result.timedOutAfterMs}ms, SIGKILLed by the harness)`
+        }`,
+        outputTail("stdout tail", result.stdout),
+        outputTail("stderr tail", result.stderr),
+      ].join("\n\n"),
+      { cause: stdinError },
+    );
+
   const waitForExit = async (
     timeoutMs = options?.exitTimeoutMs ?? DEFAULT_EXIT_TIMEOUT_MS,
   ): Promise<RunResult> => {
     if (closeResult) {
       cleanupProcessGroupOnClose();
       disposeOwnHome();
+      if (stdinError !== undefined) {
+        throw stdinFailure(closeResult);
+      }
       return closeResult;
     }
 
@@ -429,6 +455,9 @@ export function spawnSupabase(
     });
 
     disposeOwnHome();
+    if (stdinError !== undefined) {
+      throw stdinFailure(timedOut ? { ...result, timedOutAfterMs: timeoutMs } : result);
+    }
     return timedOut ? { ...result, timedOutAfterMs: timeoutMs } : result;
   };
 
diff --git a/packages/config/scripts/build.ts b/packages/config/scripts/build.ts
index 0aaec37bc8..8c6e63d5fa 100644
--- a/packages/config/scripts/build.ts
+++ b/packages/config/scripts/build.ts
@@ -71,8 +71,14 @@ async function renderJsonSchema(outputPath: string, json: Record<string, unknown
     stdout: "pipe",
     stderr: "pipe",
   });
-  await formatter.stdin.write(schema);
-  await formatter.stdin.end();
+  try {
+    await formatter.stdin.write(schema);
+    await formatter.stdin.end();
+  } catch (error) {
+    if (!(error instanceof Error && "code" in error && error.code === "EPIPE")) {
+      throw error;
+    }
+  }
 
   const [exitCode, formatted, stderr] = await Promise.all([
     formatter.exited,
diff --git a/packages/config/scripts/semantic-release-path-filter.ts b/packages/config/scripts/semantic-release-path-filter.ts
index e7efd7a0c4..b0b008c165 100644
--- a/packages/config/scripts/semantic-release-path-filter.ts
+++ b/packages/config/scripts/semantic-release-path-filter.ts
@@ -107,8 +107,14 @@ export async function filterCommitsToPackage<T extends { hash: string }>(
   // is one runtime port away — don't rely on the buffering behavior.
   const stdoutText = new Response(proc.stdout).text();
   const stderrText = new Response(proc.stderr).text();
-  await proc.stdin.write(`${hashes.join("\n")}\n`);
-  await proc.stdin.end();
+  try {
+    await proc.stdin.write(`${hashes.join("\n")}\n`);
+    await proc.stdin.end();
+  } catch (error) {
+    if (!(error instanceof Error && "code" in error && error.code === "EPIPE")) {
+      throw error;
+    }
+  }
 
   const [exitCode, stdout, stderr] = await Promise.all([proc.exited, stdoutText, stderrText]);
   if (exitCode !== 0) {