_h2_multistream_interop_gate.nx

_h2_multistream_interop_gate.nx -- TUTOR-BOOTSTRAP SCAFFOLD (Claude, B1 rung(6) R4-H2-009), NOT credited as team self-authoring (EoE back-fill owed). THE SOVEREIGN EXTERNAL-INTEROP GATE ORGAN for persistent multi-stream h2. This REPLACES the ad-hoc inline curl orchestration I ran by hand at rung(6) (and the kind of committed .sh harness BL-025 forbids) with a SINGLE self-contained sovereign organ: it stands up OUR persistent multi-stream ALPN-h2 server AND drives an EXTERNAL curl --http2 against it AND emits a machine-checkable verdict -- all in one process tree, no shell, no committed script. Run it and it tells you GREEN/RED; nothing to orchestrate by hand. TOPOLOGY (design B -- self-contained, chosen because the runtime has no sys_unlink/sys_nanosleep so composing the prebuilt daemon ELF would race on a STALE cert.pem; here the PARENT mints a FRESH cert each run and binds BEFORE forking, so there is no stale-key risk and no readiness race): parent: mint fresh Ed25519 SAN=localhost leaf (shared nx_h2_test_leaf) + export PEM /tmp/nx_h2_gate_cert.pem + bind 127.0.0.1:9445 + listen. pipe2 -> fork: child : dup3 pipe-write over stdout, execve /usr/bin/curl --http2 with 4 same-origin URLs (the multiplex/reuse test) + -w num_connects. parent: accept ONE connection -> h2_serve_connection_multi (cap=16) -> served count; drain curl's captured stdout; wait4 curl -> exit. VERDICT GREEN iff: served == 4 (4 streams answered on the ONE accepted conn) AND curl_exit == 0 (every transfer succeeded) AND http200_count == 4 AND newconn_count == 1 (curl opened exactly ONE TCP connection for all 4 transfers = real reuse/multiplex, the discriminating measurement). curl is the LAST-MILE interop ORACLE (nghttp2/OpenSSL) -- unfakeable; OUR side is 100% sovereign. HONEST scope: ONE connection / 4 sequential-or-multiplexed streams (curl decides reuse vs multiplex; both prove persistence). This organ is the REPRODUCIBLE gate; the rung(6) capability itself is R4-H2-008 (already DONE). COMPOSES (each imported once): nx_h2_serve_multi (the persistent driver + transitive framing/tls transport stones), nx_h2_test_leaf (shared cert/PEM), nx_x25519_ephemeral + nx_csprng (per-connection handshake entropy), nx_syscalls (sockets/fork/execve/pipe/wait4/dup3). license_tier: INDEPENDENT_REDERIVE genealogy_id: international-research-sources/ietf/rfc_9113 + rfc_7301 + rfc_8446 lineage_id: nishi_h2_multistream_interop_gate_b1r6