Core and the basics

The prelude and runtime, the operating system, time, numbers, threads and actors.

core: The prelude: loaded before any module and wildcard-imported into every module.
conestd: The runtime every native Cone program links beside its own objects: panics, traced roots, printing, raw blocks.
stdio: Printing to standard output and standard error.
libc: Raw bindings to the ISO C standard library.
posix: Raw bindings to the POSIX functions beyond the C library: files, directories, processes, environment.

env: The process's environment: its arguments and environment variables, read, set and removed.
args: A small lexer for a program's command line: options and other arguments, one at a time.
process: Run another program and wait for it with its output captured; this program's own arguments and path.
signals: Ctrl-C and terminate as a flag the program looks at, so it can shut down cleanly (Windows and Linux).

tzdata: The IANA time zone files as data, generated by tools/tzdata/gentzdata.py.
locale: Which locale a writer writes in, and the number and date conventions of the locales known, from Unicode's CLDR.
time: Time values: Duration, Instant, Timestamp and Clock.
calendar: The civil calendar over Timestamp: dates, times of day, RFC 3339 and HTTP dates.
zonedata: Where a calendar Zone comes from on this machine, by IANA name or the machine's own.
random: A seeded, repeatable pseudo-random generator and what is drawn from it, and the OS's secure random bytes for secrets.
bigint: Arbitrary-size integers, BigUint and BigInt, written in Cone with no C.

thread: Operating-system threads, a deliberately small layer.
sync: What threads share safely: Arc, the futex, Mutex, Rwlock, Condvar, Semaphore and Once.
actors: The runtime Cone's actors run on: mailboxes, behaviours and worker threads.
cancelgroups: The one carrier of "stop this work" for all of Cone's concurrency.