Fix model fallback across main/background/sync agents

src/hooks/index.ts

@@ -14,6 +14,7 @@ export { createEmptyTaskResponseDetectorHook } from "./empty-task-response-detec
 export { createAnthropicContextWindowLimitRecoveryHook, type AnthropicContextWindowLimitRecoveryOptions } from "./anthropic-context-window-limit-recovery";
 
 export { createThinkModeHook } from "./think-mode";
+export { createModelFallbackHook, setPendingModelFallback, clearPendingModelFallback, type ModelFallbackState } from "./model-fallback/hook";
 export { createClaudeCodeHooksHook } from "./claude-code-hooks";
 export { createRulesInjectorHook } from "./rules-injector";
 export { createBackgroundNotificationHook } from "./background-notification"
@@ -31,7 +32,6 @@ export { createNoSisyphusGptHook } from "./no-sisyphus-gpt";
 export { createNoHephaestusNonGptHook } from "./no-hephaestus-non-gpt";
 export { createAutoSlashCommandHook } from "./auto-slash-command";
 export { createEditErrorRecoveryHook } from "./edit-error-recovery";
-export { createJsonErrorRecoveryHook } from "./json-error-recovery";
 export { createPrometheusMdOnlyHook } from "./prometheus-md-only";
 export { createSisyphusJuniorNotepadHook } from "./sisyphus-junior-notepad";
 export { createTaskResumeInfoHook } from "./task-resume-info";
@@ -47,5 +47,4 @@ export { createPreemptiveCompactionHook } from "./preemptive-compaction";
 export { createTasksTodowriteDisablerHook } from "./tasks-todowrite-disabler";
 export { createWriteExistingFileGuardHook } from "./write-existing-file-guard";
 export { createHashlineReadEnhancerHook } from "./hashline-read-enhancer";
-export { createHashlineEditDiffEnhancerHook } from "./hashline-edit-diff-enhancer";
-
+export { createBeastModeSystemHook, BEAST_MODE_SYSTEM_PROMPT } from "./beast-mode-system";