The Go team announced a new JSON API called jsonv2.

"Go team unveils new JSON API, jsonv2" — Hacker News (best) · AI & Technology

5 Nov 2026

What it means

The Go team has officially released a new JSON API called jsonv2, available in . It comprises two packages— and —that aim to fix behavioral flaws and improve performance over the original encoding/json package. The old package continues to be supported.

Accuracy & sourcesGrounded

The claim is directly from the official Go blog post (go.dev/blog/jsonv2), a primary source. The Hacker News post is a secondary summary that faithfully reports the announcement. The underlying fact is solid.

How new

Genuinely new—announced on November 4, 2026, with no earlier circulation.