add prompts and knowledge files

data/knowledge/c-programming.txt

@@ -0,0 +1,16 @@
+C is a general-purpose programming language created by Dennis Ritchie at Bell Labs in 1972.
+C is the lingua franca of operating systems and embedded systems programming.
+The C standard library provides functions for input/output string manipulation memory allocation and more.
+Pointer arithmetic is one of the most powerful and dangerous features of C.
+Undefined behavior in C includes buffer overflows null pointer dereferences and signed integer overflow.
+Memory safety is the programmer's responsibility in C unlike in managed languages.
+The Linux kernel is written almost entirely in C with some assembly for low-level operations.
+sizeof operator returns the size of a type or object in bytes.
+malloc calloc realloc and free are the primary memory management functions.
+String handling in C uses null-terminated character arrays with functions like strcpy strlen strcmp.
+C99 C11 C17 and C23 are the major standards versions with varying levels of compiler support.
+Pointers are variables that store memory addresses and allow direct memory manipulation.
+Function pointers enable callbacks and dynamic dispatch in C.
+The preprocessor handles directives like include define and ifdef before compilation.
+Static analysis tools like lint cppcheck and coverity catch common C programming errors.
+Buffer overflows are still the most common security vulnerability in C code after decades.