Extract current test env, scope, fixture, and runtime guidance into a
repo-owned override for the canonical Run base.
Deats,
- require `xonsh` plugin disable and approved Nix provisioning
- separate deterministic checks from live, GUI, and container cases
- map source areas and document actor timeout retry behavior
Prompt-IO: ai/prompt-io/opencode/20260724T220156Z_43d7a3ed_prompt_io.md
(this patch was generated in some part by `opencode` using
`gpt-5.6-sol` (`openai`))