Prompt Structured outputsPrompt Engineering GuiderLlamaFirewallGuidance pyGuardrail aiNeMo GuardrailsTypeChatmicrosoft • Updated 2026 Jan 16 15:42parserllmr2d4 • Updated 2025 Oct 10 12:10rellmr2d4 • Updated 2025 Dec 24 20:57tanuki.pyTanuki • Updated 2026 Jan 13 1:0SteerLMoutlinesdottxt-ai • Updated 2026 Jan 16 15:59 JSON guardrailjson-rendervercel-labs • Updated 2026 Jan 16 18:30aclanthology.orghttps://aclanthology.org/2025.acl-long.243.pdfaclanthology.orghttps://aclanthology.org/2025.ranlp-1.124.pdf