Stdlib API

The cobra4 stdlib is written in cobra4 itself under cobra4/stdlib/*.c4 and loaded via an mtime-cached import hook.

use cobra4.stdlib.http as http
use cobra4.stdlib.fs   as fs

Modules at a glance

Module	Highlights
cobra4.stdlib.http	Session, get, post, retry policy, basic auth
cobra4.stdlib.json	parse, dump (thin wrappers with sane defaults)
cobra4.stdlib.fs	walk, copy, copytree, move, read_text
cobra4.stdlib.data	group_by, aggregate, join, sort_by
cobra4.stdlib.time	parse / format durations and timestamps
cobra4.stdlib.strings	slugify, camel_to_snake, snake_to_camel
cobra4.stdlib.cli	App builder for argparse-style command trees
cobra4.stdlib.test	assertion DSL used by c4 test

The full source per module is short and idiomatic — it's the easiest way to learn cobra4 conventions.

Caching

First import transpiles <mod>.c4 to Python and writes __pycache__/<mod>.cobra4.pyc keyed on source mtime + size. Edits trigger a single re-transpile; otherwise it's a single file read.