A skill that hands its work to subagents (vp-auto) showed "Edited 1 file"
for a turn that changed 4: a subagent's Write/Edit calls are in its own
agent-<id>.jsonl, so the card only saw the parent's.
- server/lib/agent-edits.js reads a subagent's transcript (readLines, a
member's only as theirs) for the files it wrote or edited with their +/-
lines, nested subagents folded in (3 levels), cached by size + mtime.
- The transcript route puts them on each Claude Agent/Task result as
`edits`; the card adds them to the turn's own edits. A file only a
subagent wrote is listed, never an artifact card (its versions are
rebuilt from this transcript's inputs, which a subagent's are not).
