feat(watchdog): quarantine escalates to ask_owner; reinstate/retire resolve fail-safe (#45)

crowreg.go

@@ -99,6 +99,25 @@ func (s *CrowStore) Len() int {
 	return len(s.spun)
 }
 
+// Remove deletes a spun crow from the registry (the owner's retire call,
+// #45). A name not in the registry is a no-op: the removal is idempotent.
+func (s *CrowStore) Remove(name string) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	i := slices.IndexFunc(s.spun, func(c SpunCrow) bool { return strings.EqualFold(c.Name, name) })
+	if i < 0 {
+		return nil
+	}
+	old := s.spun
+	rest := slices.Clone(old)
+	s.spun = slices.Delete(rest, i, i+1)
+	if err := s.save(); err != nil {
+		s.spun = old
+		return err
+	}
+	return nil
+}
+
 // save writes atomically. The caller holds s.mu.
 func (s *CrowStore) save() error {
 	data, err := json.MarshalIndent(s.spun, "", "  ")