wrangler >=4.129.1 changed what `bundle size reporter` does. The bundle size reporter now compares the uncompressed bundle size against the 64 MiB limit for its color-coded warnings, instead of gzip size against 3 MiB. Silent: code written for older versions still runs, without an error.

const fs = require("fs");
function symptom(msg) { console.error("FAIL: " + msg); process.exit(1); }
function broken(msg) { console.error("ERROR: " + msg); process.exit(2); }
const src = fs.readFileSync("/w/node_modules/wrangler/wrangler-dist/cli.js", "utf8");
const a = src.indexOf("function printBundleSize(");
const b = a < 0 ? -1 : src.indexOf("\n}\n", a);
const k = b < 0 ? -1 : src.indexOf("ONE_KIB_BYTES = 1024;", b);
const m = k < 0 ? -1 : src.indexOf("\n", src.indexOf("SIZE_BYTES = ", k));
if (a < 0 || b < 0 || k < 0 || m < 0) broken("could not find printBundleSize in cli.js");
const body = src.slice(a, b + 3);
const consts = src.slice(k, m + 1);
const lines = [];
const make = new Function("logger", "source_default", "var ONE_KIB_BYTES, MAX_GZIP_SIZE_BYTES, MAX_UNCOMPRESSED_SIZE_BYTES;\n" + consts + "\n" + body + "\nreturn printBundleSize;");
const color = (n) => (s) => "[" + n + "]" + s;
const print = make({ log: (s) => lines.push(s) }, { red: color("red"), yellow: color("yellow"), green: color("green") });
const MIB = 1024 * 1024;
print({ size: 60 * MIB, gzipSize: 1 * MIB });
const out = lines.join("\n");
if (!out.includes("Total Upload")) broken("no report: " + out);
if (out.includes("[red]")) { console.log("OK: 60 MiB uncompressed bundle reported red"); process.exit(0); }
if (out.includes("[green]")) symptom("60 MiB uncompressed bundle with 1 MiB gzip is reported green");
broken("unexpected output " + out);

const fs = require("fs");
function symptom(msg) { console.error("FAIL: " + msg); process.exit(1); }
function broken(msg) { console.error("ERROR: " + msg); process.exit(2); }
const src = fs.readFileSync("/w/node_modules/wrangler/wrangler-dist/cli.js", "utf8");
const a = src.indexOf("function printBundleSize(");
const b = a < 0 ? -1 : src.indexOf("\n}\n", a);
const k = b < 0 ? -1 : src.indexOf("ONE_KIB_BYTES = 1024;", b);
const m = k < 0 ? -1 : src.indexOf("\n", src.indexOf("SIZE_BYTES = ", k));
if (a < 0 || b < 0 || k < 0 || m < 0) broken("could not find printBundleSize in cli.js");
const body = src.slice(a, b + 3);
const consts = src.slice(k, m + 1);
const lines = [];
const make = new Function("logger", "source_default", "var ONE_KIB_BYTES, MAX_GZIP_SIZE_BYTES, MAX_UNCOMPRESSED_SIZE_BYTES;\n" + consts + "\n" + body + "\nreturn printBundleSize;");
const color = (n) => (s) => "[" + n + "]" + s;
const print = make({ log: (s) => lines.push(s) }, { red: color("red"), yellow: color("yellow"), green: color("green") });
const MIB = 1024 * 1024;
print({ size: 60 * MIB, gzipSize: 1 * MIB });
const out = lines.join("\n");
if (!out.includes("Total Upload")) broken("no report: " + out);
if (out.includes("[red]")) { console.log("OK: 60 MiB uncompressed bundle reported red"); process.exit(0); }
if (out.includes("[green]")) symptom("60 MiB uncompressed bundle with 1 MiB gzip is reported green");
broken("unexpected output " + out);