Merge pull request '[agent/codex:gpt-5.4-mini] Read ~/spec/code/core/go/store/RFC.md fully. Find ONE featur...' (#100) from agent/read---spec-code-core-go-store-rfc-md-fu into dev

store.go

@@ -147,6 +147,18 @@ func (storeInstance *Store) DatabasePath() string {
 	return storeInstance.databasePath
 }
 
+// Usage example: `if storeInstance.IsClosed() { return }`
+func (storeInstance *Store) IsClosed() bool {
+	if storeInstance == nil {
+		return true
+	}
+
+	storeInstance.closeLock.Lock()
+	closed := storeInstance.closed
+	storeInstance.closeLock.Unlock()
+	return closed
+}
+
 // Usage example: `storeInstance, err := store.New(":memory:", store.WithPurgeInterval(20*time.Millisecond))`
 func WithPurgeInterval(interval time.Duration) StoreOption {
 	return func(config *StoreConfig) {

store_test.go

@@ -155,6 +155,16 @@ func TestStore_DatabasePath_Good(t *testing.T) {
 	assert.Equal(t, databasePath, storeInstance.DatabasePath())
 }
 
+func TestStore_IsClosed_Good(t *testing.T) {
+	storeInstance, err := New(":memory:")
+	require.NoError(t, err)
+
+	assert.False(t, storeInstance.IsClosed())
+	require.NoError(t, storeInstance.Close())
+	assert.True(t, storeInstance.IsClosed())
+	assert.True(t, (*Store)(nil).IsClosed())
+}
+
 func TestStore_NewConfigured_Good(t *testing.T) {
 	storeInstance, err := NewConfigured(StoreConfig{
 		DatabasePath: ":memory:",