decision(firestore-send-email): kit/extension parity – CLI-installed kit runs Node 24, extension runs Node 22 #3325

firestore-send-email kit/extension parity. Priority: low. Kits installed through the CLI run on a different Node.js major than the extension.

Difference

• Extension: processQueue runs nodejs22.
• Kit: firebase functions:kits:install and ext:migrate generate a wrapper package.json with "engines": { "node": "24" } (the CLI's latest runtime), so the function deploys on nodejs24. The kit itself declares >=22. With the README's manual setup, the runtime is whatever the user's own codebase uses.

Reproduced

Seen in the CLI's generated wrapper. Not checked on the deployed function.

Code

• Extension: extension.yaml#L58.
• Kit: package.json#L23-L25; the wrapper's runtime comes from firebase-tools' package-kit.json template.

Resolution

Accept it: the runtime follows the host codebase. Record it under "Decisions" in #3290.