Returns metadata for call frames of the current or supplied thread. Returns a constant slot from a Lua prototype. Returns a Lua prototype's constants by 1-based slot. Returns function/frame metadata and the function itself. Returns a raw metatable bypassing protection. Returns a cloned nested prototype closure, or live matching closures when active is true. Lists nested prototypes in a Lua function. Returns the live VM registry. Reads a visible Lua frame's register slot or all slots. Returns one captured upvalue by 1-based index. Returns a 1-based table of upvalue values. Changes a constant while preserving its native type. Updates selected function/frame metadata. Sets/removes the raw metatable. Writes a register slot in a visible Lua frame. Adds/removes a closure from Byte's traceback-hidden set. Replaces one upvalue in a Lua closure. Checks whether a numeric level is within the thread's native frame count. Builds a Byte-formatted traceback of the current thread.