From 4e0952a3c05c98605f93e1f076c88c754b421372 Mon Sep 17 00:00:00 2001
From: "Michael B. Gale" <mbg@github.com>
Date: Fri, 27 Mar 2026 19:13:02 +0000
Subject: [PATCH] Output largest inputs

---
 pr-checks/bundle-metadata.ts | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/pr-checks/bundle-metadata.ts b/pr-checks/bundle-metadata.ts
index 1e7585536..b112cbfbd 100755
--- a/pr-checks/bundle-metadata.ts
+++ b/pr-checks/bundle-metadata.ts
@@ -4,14 +4,25 @@ import * as fs from "node:fs/promises";
 
 import { BUNDLE_METADATA_FILE } from "./config";
 
+interface InputInfo {
+  bytesInOutput: number;
+}
+
+type Inputs = Record<string, InputInfo>;
+
 interface Output {
   bytes: number;
+  inputs: Inputs;
 }
 
 interface Metadata {
   outputs: Output[];
 }
 
+function toMB(bytes: number): string {
+  return `${(bytes / (1024 * 1024)).toFixed(2)}MB`;
+}
+
 async function main() {
   const fileContents = await fs.readFile(BUNDLE_METADATA_FILE);
   const metadata = JSON.parse(String(fileContents)) as Metadata;
@@ -19,9 +30,15 @@ async function main() {
   for (const [outputFile, outputData] of Object.entries(
     metadata.outputs,
   ).reverse()) {
-    console.info(
-      `${outputFile}: ${(outputData.bytes / (1024 * 1024)).toFixed(2)}MB`,
-    );
+    console.info(`${outputFile}: ${toMB(outputData.bytes)}`);
+
+    for (const [inputName, inputData] of Object.entries(outputData.inputs)) {
+      // Ignore any inputs that make up less than 5% of the output.
+      const percentage = (inputData.bytesInOutput / outputData.bytes) * 100.0;
+      if (percentage < 5.0) continue;
+
+      console.info(`  ${inputName}: ${toMB(inputData.bytesInOutput)}`);
+    }
   }
 }