feat(hooks): add no-hephaestus-non-gpt hook to enforce GPT-only for Hephaestus

src/hooks/index.ts

@@ -28,6 +28,7 @@ export { createThinkingBlockValidatorHook } from "./thinking-block-validator";
 export { createCategorySkillReminderHook } from "./category-skill-reminder";
 export { createRalphLoopHook, type RalphLoopHook } from "./ralph-loop";
 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";