pipeio_rule_stub (original) — generate Snakemake rule stub from contract spec

Goal

(promoted from note)

Context

(see source note)

Prompt

Subsumed by the combined pipeio_rule_list + pipeio_rule_stub task (task-arash-20260325-213420). This capture contains the detailed rule_stub spec. Merge into the combined task.

Reference capture: 20260325-210906-92b29c.

Acceptance Criteria

• [ ]

Result

(pending)