Codex Rust Resource Ownership with Rc, Arc, and Weak

Choose borrowing or reference counting according to ownership and thread boundaries. Review how weak links affect resource lifetime.

Install in Codex

Codex, a Rust checkout and Cargo. The example uses local practice data.

Copy the pinned `skills/rust-resource/` directory into `.agents/skills/rust-resource/` in the project.
Select `$rust-resource` and describe owners, thread boundaries, and mutation needs.

In a practice tree, a parent owns child nodes. Ask how a child can refer back to the parent without extending its lifetime.

The explanation shows how to upgrade the weak parent reference and how to handle a parent that is already gone.

Prefer a borrow where possible. Rc is available when single-thread reference counting is needed.