ludic/examples/networking/net_rt.ludic
Orkuncakilkaya fb728bbefe chore(repo): DX cleanup — categorise examples, text-diffable golden, build/ output (#27 #28 #30)
Repository-cleanup / DX pass folding three tracker items into one coherent
change, verified green end to end (`bin/x test` 49/0, `bin/x selfhost-test`
29/0, `bin/x test-tools` 29/0).

#28 — curate & categorise examples/
- 42 flat entries regrouped into intent-revealing subdirs: games/, rendering/,
  ecs/, events/, networking/, lang/, library/ (was lib/).
- chronorift dir-vs-file duplication resolved: the entry file and its import
  modules now live together under games/chronorift(.ludic).
- Every path reference updated repo-wide (test runner, editor-tool drivers,
  docs/site, design docs).
- New examples/README.md indexes the whole set with run commands.
- Showcase examples without a self-asserting entry (hello, events, net_rt) now
  get a compile-only rot guard in `bin/x test`, so nothing here rots silently.

#30 — text-diffable golden baseline
- The 4 binary selfhost/golden/*.ppm blobs are replaced by a single
  selfhost/golden/renders.sha256 manifest (SHA-256 per render). Hashes are
  byte-identical to the old PPMs, so the baseline is unchanged — only its form.
- game_case now compares framebuffer hashes; a regression shows as a changed
  hex line in review, not "binary files differ".
- New `bin/x golden` regenerates the manifest deliberately (review with
  `git diff selfhost/golden/renders.sha256`).

#27 — PPM & asset handling
- Headless renders now write build/out.ppm, never the repo root; `x app`,
  `x clean`, messaging and .gitignore updated to match. Nothing is written to
  the working root any more.
- Redundant local Kenney .zip archives removed (the art ships extracted;
  .gitignore already excludes *.zip). CC0 License.txt files retained.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-08-30 18:54:21 +03:00

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# net_rt.ludic — a blessed, server-authoritative replication runtime (NETWORKING
# N6). It ties the language's networking primitives together into a batteries-
# included default, the way tests/mod_c/mod.c proved the event ABI — but written
# in Ludic, over the built-in transport, with no foreign code.
#
# This is LIBRARY POLICY, not the language (NETWORKING-DESIGN §10, §12): it picks
# server-authoritative state replication. The seams stay open — swap this for
# lockstep+rollback (world_save + tick_fixed on misprediction) or your own.
#
# Frame layout on the wire: [i32 entity id][synced field bytes]. The authority
# calls rt_replicate(e) per entity each tick; a peer calls rt_receive() to drain
# inbound snapshots and apply them. serialize/apply are the compiler-generated
# @Sync codecs; net_send/net_poll are the transport seam (built-in loopback here,
# a real socket when a program binds `extern fn net_send/net_poll`).
# The authority ships one entity's authoritative synced state to peers.
function rt_replicate(e: int) -> void {
let w = words(512)
w[0] = e # entity id in the first word
let n = serialize(e, offset(w, 4)) # synced fields after it
net_send(0, w, 4 + n)
}
# A peer drains every inbound snapshot and applies it to the named entity. One
# datagram per poll (the transport is datagram-preserving), so loop until empty.
function rt_receive() -> void {
let w = words(512)
var n = net_poll(w, 2048)
while n > 0 {
apply(w[0], offset(w, 4), n - 4) # w[0] = entity id; bytes follow
n = net_poll(w, 2048)
}
}