chore: raise the root .nvmrc to Node 24

[MarkFeder]

What

Raises the root .nvmrc from 22 to 24. One line.

Split out of #723, where Greptile flagged the mismatch. Per CONTRIBUTING.md — "Do not bump language runtimes … as an incidental part of another change" — it belongs in its own PR rather than folded into an example.

Why

Twelve packages already require Node 24. They depend on @solana-program/token at ^0.14.0 or later, and every release of that package which declares engines requires >=24.0.0:

Version	engines.node
≤ 0.13.0	(none declared)
0.14.0	>=24.0.0
0.15.0	>=24.0.0
0.16.0	>=24.0.0

So there is no Node 22-compatible version to pin back to — the floor genuinely moved.

Nothing else in the repo still says 22. The two games/*/pinocchio projects already pin 24.13.0 in their own .nvmrc, and CI takes the setup action's default node-version: 'lts/*' with check-latest: true, which resolves to Node 24 today. The root .nvmrc is the last file saying 22 — and the one contributors actually read, since CONTRIBUTING.md points them at it.

Effect

A contributor on Node 22 currently gets an unsupported-engine warning on pnpm install, and a hard failure once engine-strict is enabled.

No CI behaviour changes: no workflow reads the root .nvmrc. just.yml reads ${{ matrix.project }}/.nvmrc — the per-project files under games/ — and every other workflow uses lts/* or an explicit version. The Prettier job stays on Node 20, which is fine: it installs root devDependencies only (--ignore-workspace), and none of those declare an engine above 20.

Deliberately left alone: no engines field added to the root package.json, and no change to typescript.yml.

---

AI use: I identified the version floor and verified it against the published engines metadata and every Node declaration in the repo; the change itself is one line.

[greptile-apps]

Greptile Summary

The PR updates the repository’s root Node.js version marker from Node 22 to Node 24.

• Aligns the contributor-facing .nvmrc with the Node.js version required by current workspace dependencies.
• Makes no application, workflow, or security-sensitive code changes.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
.nvmrc	Updates the root Node.js development version from 22 to 24; no actionable issue was identified in the follow-up scope.

_{Reviews (2): Last reviewed commit: "chore: raise the root .nvmrc to Node 24" | Re-trigger Greptile}

[MarkFeder]

@amilz could you take a look at this one when you get a chance?

No open review threads left on it, so it is ready for maintainer review. It is one of 23 open Pinocchio ports I have up — they are independent and self-contained, so they can be reviewed and merged in any order: https://github.com/solana-developers/program-examples/pulls/MarkFeder

[dev-jodee]

Hey, in order to not overflow our reviewers with PRs, we'll limit the number of opened PRs to 3 per contributor for now. Thanks for the work! (You can re-open those whenever your other PRs get merged in)