registry

type ExecutorCapabilities struct {
	// Command indicates whether the executor supports the command field.
	Command bool
	// MultipleCommands indicates whether the executor supports multiple commands.
	MultipleCommands bool
	// Script indicates whether the executor supports the script field.
	Script bool
	// Shell indicates whether the executor uses shell/shellArgs/shellPackages.
	Shell bool
	// Stdin indicates whether the executor supports the stdin field for piping
	// a file's contents to the command's standard input.
	Stdin bool
	// Container indicates whether the executor supports step-level container config.
	Container bool
	// SubDAG indicates whether the executor can execute sub-DAGs.
	SubDAG bool
	// WorkerSelector indicates whether the executor supports worker selection.
	WorkerSelector bool
	// LLM indicates whether the executor supports the llm field.
	LLM bool
	// Messages indicates whether the executor takes the messages field and
	// requires at least one message when an llm config is present.
	Messages bool
	// CommandContext returns command execution facts for command field resolution.
	CommandContext func(ctx context.Context, step ir.Step) cmnvalue.CommandContext
	// ScriptContext returns command execution facts for script field resolution.
	ScriptContext func(ctx context.Context, step ir.Step) cmnvalue.CommandContext
	// DryRunCheck reports what a dry run can tell will fail on this host, such
	// as a file the step reads that does not exist, without running the step.
	// It receives the declared step with its with fields resolved as far as a
	// dry run can; a value that still holds a reference, such as a step
	// output, is left as written and the check must skip it. The error's text
	// is shown as a warning and never fails the dry run; several problems can
	// be joined into one error.
	DryRunCheck func(ctx context.Context, step ir.Step) error
	// ConfigWarnings reports settings in the step's configuration that are
	// valid but likely give results the author does not expect. Loading the
	// DAG shows each message as a warning. It also receives steps that fail
	// validation and need not report what validation already does.
	ConfigWarnings func(step ir.Step) []string
}

type StepValidator func(step ir.Step) error