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The er-bif-http-listen BIF body in lib/erlang/runtime.sx referenced
er-http-resp-to-sx / er-http-req-of-sx — helpers deleted by 78eae9ef
("fed-sx-m1: 8b-bridge cleanup") because the BIF body never picked
them up. Listener bound but every request handler crashed on first
call to the undefined helpers; curl got 000 / empty body.
Rewrote the sx-handler bridge to thread through the live marshallers
that the cleanup commit's message claimed were already in use:
Inbound: SX Dict {:method :path :query :headers :body}
-> er-request-dict-to-proplist
-> Erlang request proplist matching http_server:route/2 shape
(binaries for path/method/body, dict-like proplist for headers)
Outbound: Erlang [{status, N}, {headers, [{Bin, Bin}, ...]}, {body, Bin}]
-> er-proplist-to-dict
-> SX Dict matching what native http-listen serialises
(er-to-sx-deep auto-converts binary values to strings and
flattens the 2-tuple headers cons to a nested SX dict)
This is technically substrate work in lib/erlang/runtime.sx but
stays within the m2 briefing's allowed exception scope — the http
BIF wrappers (Step 8a / 8e / now 12-prep) are the explicit substrate
carve-outs. Unblocks Step 12's REAL two-instance smoke test rather
than an in-process loopback variant.
Test: next/tests/http_server_tcp.sh 5/5
- GET / -> 200
- GET /.well-known/sx-capabilities -> 200 (body contains "kernel:")
- GET /no-such-path -> 404
- POST /activity (no bearer) -> 401
- POST /activity (bad bearer) -> 401
No-regression gates green: Erlang conformance 761/761,
httpc_request 10/10, dispatch_http 10/10, http_listen_bif 5/5,
discovery_fetch 11/11, http_multi_actor 44/44, http_marshal 10/10.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>