Covers the GitHub Actions driver: dispatching a run and reading its uploaded transcript back as a turn, chaining turns on the pushed branch, resuming the agent session, unique run correlation, refusing unsafe values bound for the runner, failing and timing out with the run named, and reading produced code off the branch.

## Before writing SPEC.md files

Read https://raw.githubusercontent.com/brillout/sdd/refs/heads/main/sdd.md
