Formatting and linting

Run the standard gates before opening a pull request:

• make check-fmt
• make lint

When changes affect command/transport runtime seams or dependency baselines, run the full release gate set in this order:

• bun install
• make build
• make check-fmt
• make lint
• make test

When documentation changes, also run:

• bunx markdownlint-cli2 "docs/**/*.md"
• nixie --no-sandbox