fn publish_backfill_status(
watcher: &SubagentWatcher,
parent_block_id: &str,
status: &str,
)Expand description
Publish a mps::EVENT_SUBAGENT_BACKFILL_STATUS ping, scoped to this
pane’s own block id. No-op if self.broker was never wired (tests, or a
SubagentWatcher built via bare new()) – see the broker field’s own
doc comment in mod.rs. See
docs/retro/retro-activity-dock-flicker-survives-debounce-fix-2026-08-24.md
section 5.