Single-instance, single-actor fed-sx server built as Erlang-on-SX modules. See plans/fed-sx-design.md for the architecture and plans/fed-sx-milestone-1.md for the build plan.

Layout

next/
├── kernel/      Erlang-on-SX kernel modules (.erl, hot-loaded via code:load_binary/3)
├── genesis/     SX source files for the genesis bootstrap bundle (DefineActivity, ...)
├── tests/       Bash test scripts driving sx_server.exe via the epoch protocol
└── data/        Runtime state — gitignored
    ├── log/         per-actor JSONL outboxes
    ├── objects/     CID-addressed artifacts on disk
    ├── snapshots/   projection snapshots
    ├── indexes/     derived projection index files
    └── keys/        actor signing keys + bearer tokens

Substrate

The kernel is Erlang-on-SX. Each .erl source file is hot-loaded at boot via code:load_binary(Mod, Filename, SourceString) (Erlang Phase 7 BIF). The underlying SX runtime provides the host primitives the kernel calls into: crypto:*, cid:*, file:*, code:*, and (Step 8) http:listen/2.

Tests drive the kernel via the epoch protocol:

printf '(epoch 1)\n(load "lib/erlang/runtime.sx")\n(epoch 2)\n<test-expr>\n' \
  | hosts/ocaml/_build/default/bin/sx_server.exe