Pattern library for prompt engineering — codify prompts into reusable designs targets a $30.0B = 25M developers x $1,200/year tooling spend total addressable market with medium saturation and a year-over-year growth rate of 35% estimated for AI dev tools and MLOps subsegments.

Key trends driving demand: LLM proliferation -- more teams embedding models increases demand for repeatable prompt design and governance.; MLOps & observability convergence -- organizations expect monitoring, testing, and rollback for model-driven features, extending to prompts.; Shift to platformization -- companies prefer standardized internal platforms over ad-hoc scripts, enabling a patterns marketplace.; Composable tooling -- open frameworks (LangChain, HF) allow pattern libraries to integrate into developer workflows, accelerating adoption..