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Crypto (#19): add the OS cryptographically-secure random surface (random_bytes/random_hex/random_u32, reading /dev/urandom) and a standard base64 encoder, completing the library alongside the existing SHA-256/ HMAC-SHA256/verify_hmac/hex/ct_equal. All pure integer IR, C-free. Uuid (#16): a new namespace for stable, collision-free IDs — v4 (random) and v7 (time-ordered) generation, plus parse/is_valid/to_text/equals/nil. UUIDs are canonical lowercase 36-char strings; v4 and v7's random tail draw from the crypto CSPRNG, so both carry the documented determinism caveat (mint at the edges, never inside lockstep simulation). Reuses the crypto prelude's fn_secure_bytes / fn_hex_encode. - examples/library/{crypto,uuid}.ludic: known-answer vectors (SHA-256, HMAC, base64 per RFC 4231/4648) and structural invariants (uuid version/variant bits, parse/equals), wired into `x test` (now 51 passed). - docs: per-symbol pages for every new method + a new Uuid section; inventory and impl-vs-docs coverage check pass. - seed regenerated; `x bootstrap-cfree` fixpoint holds. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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| id | name | category | kind | tokens | sig | tip | order | ns | member |
|---|---|---|---|---|---|---|---|---|---|
| crypto-random_u32 | Crypto.random_u32 | crypto | namespace-method | Crypto.random_u32 | Crypto.random_u32() -> int | One CSPRNG-drawn 32-bit integer. | 8 | Crypto | random_u32 |
Draws four bytes from the OS CSPRNG and assembles them into one 32-bit integer. Use it when you need a single unpredictable number rather than a hex string — a random challenge value, a per-run identifier, or a non-deterministic seed to hand to a fresh Random stream at startup. Because the bytes come from the secure generator, the value prints as a signed integer and can be negative.
Like the other secure-random helpers this is non-deterministic and must not be called inside the lockstep simulation: doing so desyncs replays and networked peers. Draw it at the edges (startup, on connect) and, if you need reproducible gameplay randomness afterward, seed Random.seed with it once.
program Challenge {
entry {
let c = Crypto.random_u32()
Random.seed(value: c) # non-deterministic seed, chosen once at startup
print(Random.int(100))
}
}