📚 Add LlamaCPP and grammars info

docs/concepts/local-models.md

@@ -1,5 +1,21 @@
 # Local Models
 
+Funcchain supports local models through the [llama.cpp](https://github.com/ggerganov/llama.cpp) project using the [llama_cpp_python](https://llama-cpp-python.readthedocs.io/en/latest/) bindings.
+
 ## LlamaCPP
 
+Written in highly optimized C++ code, LlamaCPP is a library for running large language models locally.
+It uses GGUF files which are a binary format for storing quantized versions of large language models.
+You can download alot of GGUF models from TheBloke on huggingface.
+
 ## Grammars
+
+Context Free Grammars are a powerful abstraction for a deterministic shape of a string.
+Funcchain utilizes this by forcing local models to respond in a structured way.
+
+For example you can create a grammar that forces the model to always respond with a json object.
+This is useful if you want to use the output of the model in your code.
+
+Going one step further you can also create a grammar that forces the model to respond with a specific pydantic model.
+
+This is how funcchain is able to use local models in a structured way.