diff --git a/src/query/transitions.ts b/src/query/transitions.ts
index f8fe51551..ba2fa8b40 100644
--- a/src/query/transitions.ts
+++ b/src/query/transitions.ts
@@ -1,3 +1,20 @@
-// Auto-generated stub — replace with real implementation
-export type Terminal = any;
-export type Continue = any;
+export type Terminal =
+  | { reason: 'completed' }
+  | { reason: 'blocking_limit' }
+  | { reason: 'image_error' }
+  | { reason: 'model_error'; error?: unknown }
+  | { reason: 'aborted_streaming' }
+  | { reason: 'aborted_tools' }
+  | { reason: 'prompt_too_long' }
+  | { reason: 'stop_hook_prevented' }
+  | { reason: 'hook_stopped' }
+  | { reason: 'max_turns'; turnCount: number }
+
+export type Continue =
+  | { reason: 'collapse_drain_retry'; committed: number }
+  | { reason: 'reactive_compact_retry' }
+  | { reason: 'max_output_tokens_escalate' }
+  | { reason: 'max_output_tokens_recovery'; attempt: number }
+  | { reason: 'stop_hook_blocking' }
+  | { reason: 'token_budget_continuation' }
+  | { reason: 'next_turn' }