update-v8

Updating V8 in workerd

V8 updates are high-risk changes that require careful patch management and human judgment for merge conflicts. This skill covers the full process. Always confirm the target version with the developer before starting.

See also: docs/v8-updates.md for the original reference document.

Always communicate and confirm with the developer at each step. Never take irreversible actions (like dropping patches or updating hashes) without explicit confirmation.

Prerequisites

• depot_tools installed and on $PATH (setup guide)
• A local V8 checkout (outside the workerd repo to avoid confusing Bazel):

  mkdir v8 && cd v8 && fetch v8