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increase supported range for Next.js to version 16.0 #9463

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increase supported range for Next.js to version 16.0 #9463

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a6498a0
increase supported range for Next.js to version 16.0
leoortizz Nov 14, 2025
8d0b627
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leoortizz Nov 14, 2025
f5cdefa
Merge branch 'master' into leoortizz_nextjs16
leoortizz Nov 18, 2025
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2 changes: 1 addition & 1 deletion src/frameworks/next/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,7 @@
const DEFAULT_BUILD_SCRIPT = ["next build"];
const PUBLIC_DIR = "public";

export const supportedRange = "12 - 15.0";
export const supportedRange = "12 - 16.0";
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@gemini-code-assist gemini-code-assist bot Nov 14, 2025

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high

The updated range 12 - 16.0 is a bit too restrictive. According to semver hyphen ranges X.Y.Z - A.B.C is equivalent to >=X.Y.Z <=A.B.C. This means the new range will only allow Next.js up to version 16.0.0 exactly, and will not include any patch or minor releases like 16.0.1 or 16.1.0.

To support all of Next.js version 16, you could change the range to 12 - 16. This would be equivalent to >=12.0.0 <17.0.0, which seems more aligned with the intent to support Next.js 16.

Suggested change
export const supportedRange = "12 - 16.0";
export const supportedRange = "12 - 16";


export const name = "Next.js";
export const support = SupportLevel.Preview;
Expand All @@ -97,13 +97,13 @@
const DEFAULT_NUMBER_OF_REASONS_TO_LIST = 5;

function getReactVersion(cwd: string): string | undefined {
return findDependency("react-dom", { cwd, omitDev: false })?.version;

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Unsafe member access .version on an `any` value

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}

/**
* Returns whether this codebase is a Next.js backend.
*/
export async function discover(dir: string) {

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Missing return type on function
if (!(await pathExists(join(dir, "package.json")))) return;
const version = getNextVersion(dir);
if (!(await whichNextConfigFile(dir)) && !version) return;
Expand Down Expand Up @@ -160,10 +160,10 @@

const nextBuild = new Promise((resolve, reject) => {
const buildProcess = spawn(cli, ["build"], { cwd: dir, env });
buildProcess.stdout?.on("data", (data) => logger.info(data.toString()));

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Unsafe argument of type `any` assigned to a parameter of type `Error`
buildProcess.stderr?.on("data", (data) => logger.info(data.toString()));

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buildProcess.on("error", (err) => {
reject(new FirebaseError(`Unable to build your Next.js app: ${err}`));

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});
buildProcess.on("exit", (code) => {
resolve(code);
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