wrangler-4-124-0-4-b

Question

How can I make wrangler versions upload pick the newest compatibility date automatically?

Answer key

A correct answer says

`wrangler deploy --latest` and `wrangler versions upload --latest` set the compatibility date to the newest date the bundled workerd supports (its release date).

The stale answer

`wrangler deploy --latest` sets the compatibility date to today's date.

The change's lesson

Answer

Pass `--latest`: `npx wrangler versions upload --latest`. In wrangler 4.124.0 and later (you have 4.148.0), `--latest` uses the newest compatibility date your installed Wrangler supports, so it doesn't reach for a runtime date newer than your CLI. Don't also set `--compatibility-date` on the command line, because that pins a specific date.

This project's `.ludion/lessons.md` notes that a compatibility date of 2026-08-04 or later turns `nodejs_compat` on by default. If you don't want that, remove the `nodejs_compat` flags and add both `no_nodejs_compat` and `no_nodejs_compat_v2` to `compatibility_flags`.

I took these details from the lessons file and didn't run the command here, so `npx wrangler versions upload --help` will confirm how the flag works in your version.

Answering cost $0.08.

Grade

correct

The judge's reason: It says `wrangler versions upload --latest` uses the newest compatibility date the installed Wrangler supports rather than today's date, which matches the key.

The judge's log

Session log

What the agent wrote, the tools it called, and what they returned, from docs/bench/2026-10-11-done3/runs/B-project-sync/wrangler-4-124-0-4-b.jsonl. Thinking and the session's settings are left out. The raw log

1. Agent

   Pass `--latest`: `npx wrangler versions upload --latest`. In wrangler 4.124.0 and later (you have 4.148.0), `--latest` uses the newest compatibility date your installed Wrangler supports, so it doesn't reach for a runtime date newer than your CLI. Don't also set `--compatibility-date` on the command line, because that pins a specific date.
   
   This project's `.ludion/lessons.md` notes that a compatibility date of 2026-08-04 or later turns `nodejs_compat` on by default. If you don't want that, remove the `nodejs_compat` flags and add both `no_nodejs_compat` and `no_nodejs_compat_v2` to `compatibility_flags`.
   
   I took these details from the lessons file and didn't run the command here, so `npx wrangler versions upload --help` will confirm how the flag works in your version.