Case
sendspin-go -> aiosendspin
Start the server first, then the client. The client advertises a listener, the server connects in, streams album artwork, disconnects, and the matrix compares the received bytes against the server's encoded artwork.
Server
sendspin-go
Client
aiosendspin
Status
Passed
Artwork bytes match
Inspection
Summaries, logs, and builds
Matrix result
RAW{
"case_dir": "artifacts/results/data/macos__server-initiated-artwork__sendspin-go__to__aiosendspin",
"client_exit_code": 0,
"client_impl": "aiosendspin",
"reason": "Artwork bytes match",
"scenario_id": "server-initiated-artwork",
"server_exit_code": 0,
"server_impl": "sendspin-go",
"status": "passed"
}Server summary (JSON)
RAW{
"artwork": {
"byte_count": 2842,
"channel": 0,
"encoded_sha256": "d517c0df3f74d7ee0b250307a4edeb261f8648ce0a6db3a708789f64e280e3a9",
"format": "jpeg",
"height": 256,
"source": "album",
"width": 256
},
"client": {
"client_id": "aiosendspin-client-id",
"name": "aiosendspin-client",
"supported_roles": [
"artwork@v1"
]
},
"discovery_method": "registry_advertised",
"implementation": "sendspin-go",
"initiator_role": "server",
"peer_hello": {
"payload": {
"artwork@v1_support": {
"channels": [
{
"format": "jpeg",
"media_height": 256,
"media_width": 256,
"source": "album"
}
]
},
"client_id": "aiosendspin-client-id",
"name": "aiosendspin-client",
"supported_roles": [
"artwork@v1"
],
"version": 1
},
"type": "client/hello"
},
"preferred_codec": "none",
"role": "server",
"scenario_id": "server-initiated-artwork",
"server_id": "sendspin-go-server",
"server_name": "sendspin-go server",
"status": "ok"
}Server log
RAW{
"artwork": {
"byte_count": 2842,
"channel": 0,
"encoded_sha256": "d517c0df3f74d7ee0b250307a4edeb261f8648ce0a6db3a708789f64e280e3a9",
"format": "jpeg",
"height": 256,
"source": "album",
"width": 256
},
"client": {
"client_id": "aiosendspin-client-id",
"name": "aiosendspin-client",
"supported_roles": [
"artwork@v1"
]
},
"discovery_method": "registry_advertised",
"implementation": "sendspin-go",
"initiator_role": "server",
"peer_hello": {
"payload": {
"artwork@v1_support": {
"channels": [
{
"format": "jpeg",
"media_height": 256,
"media_width": 256,
"source": "album"
}
]
},
"client_id": "aiosendspin-client-id",
"name": "aiosendspin-client",
"supported_roles": [
"artwork@v1"
],
"version": 1
},
"type": "client/hello"
},
"preferred_codec": "none",
"role": "server",
"scenario_id": "server-initiated-artwork",
"server_id": "sendspin-go-server",
"server_name": "sendspin-go server",
"status": "ok"
}
Client summary (JSON)
RAW{
"artwork": {
"byte_count": 2842,
"channel": 0,
"received_count": 1,
"received_sha256": "d517c0df3f74d7ee0b250307a4edeb261f8648ce0a6db3a708789f64e280e3a9"
},
"client_id": "aiosendspin-client-id",
"client_name": "aiosendspin-client",
"implementation": "aiosendspin",
"initiator_role": "server",
"peer_hello": {
"payload": {
"active_roles": [
"artwork@v1"
],
"connection_reason": "playback",
"name": "sendspin-go server",
"server_id": "sendspin-go-server",
"version": 1
},
"type": "server/hello"
},
"preferred_codec": "none",
"role": "client",
"scenario_id": "server-initiated-artwork",
"server": null,
"status": "ok",
"stream": {
"channels": [
{
"format": "jpeg",
"height": 256,
"source": "album",
"width": 256
}
]
}
}Client log
RAWINFO:aiosendspin.client.listener:ClientListener started on port 19976, path /sendspin
INFO:aiosendspin.client.client:Connected to server 'sendspin-go server' (sendspin-go-server) version 1
INFO:aiosendspin.client.client:Handshake with server complete
INFO:aiohttp.access:127.0.0.1 [29/Mar/2026:04:41:41 +0000] "GET /sendspin HTTP/1.1" 101 0 "-" "Go-http-client/1.1"
INFO:aiosendspin.client.listener:ClientListener stopped
{
"artwork": {
"byte_count": 2842,
"channel": 0,
"received_count": 1,
"received_sha256": "d517c0df3f74d7ee0b250307a4edeb261f8648ce0a6db3a708789f64e280e3a9"
},
"client_id": "aiosendspin-client-id",
"client_name": "aiosendspin-client",
"implementation": "aiosendspin",
"initiator_role": "server",
"peer_hello": {
"payload": {
"active_roles": [
"artwork@v1"
],
"connection_reason": "playback",
"name": "sendspin-go server",
"server_id": "sendspin-go-server",
"version": 1
},
"type": "server/hello"
},
"preferred_codec": "none",
"role": "client",
"scenario_id": "server-initiated-artwork",
"server": null,
"status": "ok",
"stream": {
"channels": [
{
"format": "jpeg",
"height": 256,
"source": "album",
"width": 256
}
]
}
}
Server build log · sendspin-go-server · built · 0.55s
RAWNo build detail was recorded.
Client build log · python-adapters · built · 0.04s
RAWListing 'src'... Listing 'src/conformance'... Listing 'src/conformance/adapters'... Compiling 'src/conformance/adapters/__init__.py'... Compiling 'src/conformance/adapters/aiosendspin_client.py'... Compiling 'src/conformance/adapters/aiosendspin_server.py'... Compiling 'src/conformance/adapters/placeholder.py'... Compiling 'src/conformance/cli.py'... Compiling 'src/conformance/merge.py'... Compiling 'src/conformance/registry.py'... Listing 'src/sendspin_conformance.egg-info'... Listing 'scripts'... Compiling 'scripts/merge_results.py'... Compiling 'scripts/run_all.py'... Compiling 'scripts/setup_repositories.py'... Compiling 'scripts/setup_workspace.py'...