loop: use stringer for State.String, use String in slogs
diff --git a/loop/state_string.go b/loop/state_string.go
new file mode 100644
index 0000000..4556a73
--- /dev/null
+++ b/loop/state_string.go
@@ -0,0 +1,39 @@
+// Code generated by "stringer -type=State -trimprefix=State"; DO NOT EDIT.
+
+package loop
+
+import "strconv"
+
+func _() {
+ // An "invalid array index" compiler error signifies that the constant values have changed.
+ // Re-run the stringer command to generate them again.
+ var x [1]struct{}
+ _ = x[StateUnknown-0]
+ _ = x[StateReady-1]
+ _ = x[StateWaitingForUserInput-2]
+ _ = x[StateSendingToLLM-3]
+ _ = x[StateProcessingLLMResponse-4]
+ _ = x[StateEndOfTurn-5]
+ _ = x[StateToolUseRequested-6]
+ _ = x[StateCheckingForCancellation-7]
+ _ = x[StateRunningTool-8]
+ _ = x[StateCheckingGitCommits-9]
+ _ = x[StateRunningAutoformatters-10]
+ _ = x[StateCheckingBudget-11]
+ _ = x[StateGatheringAdditionalMessages-12]
+ _ = x[StateSendingToolResults-13]
+ _ = x[StateCancelled-14]
+ _ = x[StateBudgetExceeded-15]
+ _ = x[StateError-16]
+}
+
+const _State_name = "UnknownReadyWaitingForUserInputSendingToLLMProcessingLLMResponseEndOfTurnToolUseRequestedCheckingForCancellationRunningToolCheckingGitCommitsRunningAutoformattersCheckingBudgetGatheringAdditionalMessagesSendingToolResultsCancelledBudgetExceededError"
+
+var _State_index = [...]uint8{0, 7, 12, 31, 43, 64, 73, 89, 112, 123, 141, 162, 176, 203, 221, 230, 244, 249}
+
+func (i State) String() string {
+ if i < 0 || i >= State(len(_State_index)-1) {
+ return "State(" + strconv.FormatInt(int64(i), 10) + ")"
+ }
+ return _State_name[_State_index[i]:_State_index[i+1]]
+}