Declare one immutable file-producing bundle — reflow_artifact

Calls one trusted installed export, substituting only declared top-level output arguments. The writer's return value is discarded. This is not a sandbox, scheduler, native-process supervisor or complete artifact DAG. Plain strings are configuration; files must use reflow_imaging_input(). Paths reject symbolic links, special files, reserved Windows components and trailing dots/spaces. Unicode spelling is preserved, not normalized. Parents of output paths are created; declared output directories are writer-created. Installed package resources (including templates), tracked inputs and declared external runtime files are fingerprinted. Undeclared ambient state is not.

Usage

reflow_artifact_spec(
  package,
  fun,
  args = list(),
  outputs,
  inventory,
  allow_empty = character(),
  seed = NULL,
  packages = character(),
  runtime_files = character()
)

Arguments

package, fun: Installed package and exported writer function.
args: Uniquely named ordinary arguments, excluding output arguments.
outputs: Named list keyed by output argument, each an exact list with path (relative to the bundle) and type (file or directory).
inventory: Nonempty named character vector of logical artifact names mapped to exact relative file paths. Unexpected directories also fail.
allow_empty: Logical artifact names permitted to contain zero bytes.
seed: Explicit nonnegative integer seed, or NULL for a nonrandom writer.
packages: Additional installed packages to fingerprint.
runtime_files: Existing external runtime files to fingerprint. The caller must ensure the writer actually dispatches these binaries/resources.

Value

A versioned declaration; no writer is invoked.