Created allowed.txt to track allowed functions for minishell and updated AGENTS.md to tell codex to not use any forbidden functions, also updated AGENTS.md to add all builtins changes

allowed.txt

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+[minishell_allowed]
+readline
+rl_clear_history
+rl_on_new_line
+rl_replace_line
+rl_redisplay
+add_history
+printf
+malloc
+free
+write
+access
+open
+read
+close
+fork
+wait
+waitpid
+wait3
+wait4
+signal
+sigaction
+sigemptyset
+sigaddset
+kill
+exit
+getcwd
+chdir
+stat
+lstat
+fstat
+unlink
+execve
+dup
+dup2
+pipe
+opendir
+readdir
+closedir
+strerror
+perror
+isatty
+ttyname
+ttyslot
+ioctl
+getenv
+tcsetattr
+tcgetattr
+tgetent
+tgetflag
+tgetnum
+tgetstr
+tgoto
+tputs
+
+[libft]
+ft_atoi
+ft_atoi_base
+ft_atol
+ft_bzero
+ft_calloc
+ft_cdlstadd_back
+ft_cdlstadd_front
+ft_cdlstclear
+ft_cdlstdelone
+ft_cdlstiter
+ft_cdlstlast
+ft_cdlstmap
+ft_cdlstnew
+ft_cdlstsize
+ft_clstadd_back
+ft_clstadd_front
+ft_clstclear
+ft_clstdelone
+ft_clstiter
+ft_clstlast
+ft_clstmap
+ft_clstnew
+ft_clstsize
+ft_dlstadd_back
+ft_dlstadd_front
+ft_dlstclear
+ft_dlstdelone
+ft_dlstiter
+ft_dlstlast
+ft_dlstmap
+ft_dlstnew
+ft_dlstsize
+ft_eputchar
+ft_eputendl
+ft_eputnbr
+ft_eputstr
+ft_free
+ft_free_split
+ft_hashmap_clear
+ft_hashmap_clear_keys
+ft_hashmap_contains_key
+ft_hashmap_entries
+ft_hashmap_get
+ft_hashmap_hashstr
+ft_hashmap_new
+ft_hashmap_put
+ft_hashmap_remove
+ft_hashmap_strcmp
+ft_hashstr
+ft_iabs
+ft_imin
+ft_isalnum
+ft_isalpha
+ft_isascii
+ft_iscntrl
+ft_isdigit
+ft_islower
+ft_isprint
+ft_isspace
+ft_isupper
+ft_itoa
+ft_itoa_base
+ft_lstadd_back
+ft_lstadd_front
+ft_lstclear
+ft_lstclear_nodes
+ft_lstdelone
+ft_lstiter
+ft_lstlast
+ft_lstmap
+ft_lstnew
+ft_lstsize
+ft_ltoa
+ft_memchr
+ft_memcmp
+ft_memcpy
+ft_memmove
+ft_memset
+ft_nsplit
+ft_pow
+ft_putchar
+ft_putchar_fd
+ft_putendl
+ft_putendl_fd
+ft_putnbr
+ft_putnbr_fd
+ft_putstr
+ft_putstr_fd
+ft_realloc
+ft_split
+ft_strchr
+ft_strcmp
+ft_strdup
+ft_strisnum
+ft_striteri
+ft_strjoin
+ft_strlcat
+ft_strlcpy
+ft_strlen
+ft_strmapi
+ft_strncmp
+ft_strncpy
+ft_strnjoin
+ft_strnstr
+ft_strrchr
+ft_strtrim
+ft_substr
+ft_swap
+ft_tolower
+ft_toupper
+ft_uitoa
+ft_uitoa_base
+ft_ultoa_base
+
+[get_next_line]
+get_next_line
+
+[ft_printf]
+ft_eprintf
+ft_fprintf
+ft_printf