Case
sendspin-go -> sendspin-dotnet
Start the server first, then the client. The client advertises a listener, the server connects in, sends a metadata state update, disconnects, and the matrix compares a normalized metadata snapshot.
Server
sendspin-go
Client
sendspin-dotnet
Status
Passed
Metadata snapshot matches
Inspection
Summaries, logs, and builds
Matrix result
RAW{
"case_dir": "artifacts/results/data/macos__server-initiated-metadata__sendspin-go__to__sendspin-dotnet",
"client_exit_code": 0,
"client_impl": "sendspin-dotnet",
"reason": "Metadata snapshot matches",
"scenario_id": "server-initiated-metadata",
"server_exit_code": 0,
"server_impl": "sendspin-go",
"status": "passed"
}Server summary (JSON)
RAW{
"client": {
"client_id": "sendspin-dotnet-client-id",
"name": "sendspin-dotnet-client",
"supported_roles": [
"metadata@v1"
]
},
"discovery_method": "registry_advertised",
"implementation": "sendspin-go",
"initiator_role": "server",
"metadata": {
"expected": {
"album": "Protocol Fixtures",
"album_artist": "Sendspin",
"artist": "Sendspin Conformance",
"artwork_url": "https://example.invalid/almost-silent.jpg",
"progress": {
"playback_speed": 1000,
"track_duration": 180000,
"track_progress": 12000
},
"repeat": "all",
"shuffle": false,
"title": "Almost Silent",
"track": 1,
"year": 2026
}
},
"peer_hello": {
"payload": {
"artwork@v1_support": {
"channels": [
{
"format": "jpeg",
"media_height": 256,
"media_width": 256,
"source": "album"
}
]
},
"client_id": "sendspin-dotnet-client-id",
"device_info": {
"manufacturer": "Sendspin Conformance",
"product_name": "Conformance Dotnet Client",
"software_version": "0.1.0"
},
"name": "sendspin-dotnet-client",
"player@v1_support": {
"buffer_capacity": 2000000,
"supported_commands": [
"volume",
"mute"
],
"supported_formats": [
{
"bit_depth": 16,
"channels": 1,
"codec": "flac",
"sample_rate": 8000
},
{
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
},
{
"bit_depth": 16,
"channels": 2,
"codec": "flac",
"sample_rate": 44100
},
{
"bit_depth": 16,
"channels": 2,
"codec": "pcm",
"sample_rate": 44100
}
]
},
"supported_roles": [
"metadata@v1"
],
"version": 1
},
"type": "client/hello"
},
"preferred_codec": "none",
"role": "server",
"scenario_id": "server-initiated-metadata",
"server_id": "sendspin-go-server",
"server_name": "sendspin-go server",
"status": "ok"
}Server log
RAW{
"client": {
"client_id": "sendspin-dotnet-client-id",
"name": "sendspin-dotnet-client",
"supported_roles": [
"metadata@v1"
]
},
"discovery_method": "registry_advertised",
"implementation": "sendspin-go",
"initiator_role": "server",
"metadata": {
"expected": {
"album": "Protocol Fixtures",
"album_artist": "Sendspin",
"artist": "Sendspin Conformance",
"artwork_url": "https://example.invalid/almost-silent.jpg",
"progress": {
"playback_speed": 1000,
"track_duration": 180000,
"track_progress": 12000
},
"repeat": "all",
"shuffle": false,
"title": "Almost Silent",
"track": 1,
"year": 2026
}
},
"peer_hello": {
"payload": {
"artwork@v1_support": {
"channels": [
{
"format": "jpeg",
"media_height": 256,
"media_width": 256,
"source": "album"
}
]
},
"client_id": "sendspin-dotnet-client-id",
"device_info": {
"manufacturer": "Sendspin Conformance",
"product_name": "Conformance Dotnet Client",
"software_version": "0.1.0"
},
"name": "sendspin-dotnet-client",
"player@v1_support": {
"buffer_capacity": 2000000,
"supported_commands": [
"volume",
"mute"
],
"supported_formats": [
{
"bit_depth": 16,
"channels": 1,
"codec": "flac",
"sample_rate": 8000
},
{
"bit_depth": 16,
"channels": 1,
"codec": "pcm",
"sample_rate": 8000
},
{
"bit_depth": 16,
"channels": 2,
"codec": "flac",
"sample_rate": 44100
},
{
"bit_depth": 16,
"channels": 2,
"codec": "pcm",
"sample_rate": 44100
}
]
},
"supported_roles": [
"metadata@v1"
],
"version": 1
},
"type": "client/hello"
},
"preferred_codec": "none",
"role": "server",
"scenario_id": "server-initiated-metadata",
"server_id": "sendspin-go-server",
"server_name": "sendspin-go server",
"status": "ok"
}
Client summary (JSON)
RAW{
"client_id": "sendspin-dotnet-client-id",
"client_name": "sendspin-dotnet-client",
"implementation": "sendspin-dotnet",
"initiator_role": "server",
"metadata": {
"received": {
"album": "Protocol Fixtures",
"album_artist": "Sendspin",
"artist": "Sendspin Conformance",
"artwork_url": "https://example.invalid/almost-silent.jpg",
"progress": {
"playback_speed": 1000,
"track_duration": 180000,
"track_progress": 12000
},
"repeat": "all",
"shuffle": false,
"title": "Almost Silent",
"track": 1,
"year": 2026
},
"update_count": 1
},
"peer_hello": null,
"preferred_codec": "none",
"reason": null,
"role": "client",
"scenario_id": "server-initiated-metadata",
"server": {
"connection_reason": "playback",
"server_id": "sendspin-go-server",
"server_name": "sendspin-go server"
},
"status": "ok"
}Client log
RAW04:41:38 info: Sendspin.SDK.Client.SendspinHostService[0] Starting Sendspin host service
04:41:38 info: Sendspin.SDK.Connection.SendspinListener[0] WebSocket server listening on port 19964
04:41:38 info: Sendspin.SDK.Connection.SendspinListener[0] Sendspin listener started on ws://0.0.0.0:19964 (path: /sendspin)
04:41:38 info: Sendspin.SDK.Discovery.MdnsServiceAdvertiser[0] Local IP addresses for mDNS: 192.168.64.3
04:41:38 info: Sendspin.SDK.Discovery.MdnsServiceAdvertiser[0] mDNS Service Profile: FullName=sendspin-dotnet-client-id._sendspin._tcp.local, ServiceName=_sendspin._tcp, HostName=sendspin-dotnet-client-id.sendspin.local, Port=19964
04:41:38 info: Sendspin.SDK.Discovery.MdnsServiceAdvertiser[0] Advertising Sendspin client: sendspin-dotnet-client-id on port 19964 (path=/sendspin)
04:41:38 info: Sendspin.SDK.Client.SendspinHostService[0] Sendspin host service started - waiting for server connections
04:41:38 info: Sendspin.SDK.Connection.SendspinListener[0] WebSocket connection opened from 127.0.0.1
04:41:38 info: Sendspin.SDK.Client.SendspinHostService[0] New server connection: 4c2a8f24
04:41:38 info: Sendspin.SDK.Client.SendspinHostService[0] Sending client/hello: {"type":"client/hello","payload":{"client_id":"sendspin-dotnet-client-id","name":"sendspin-dotnet-client","version":1,"supported_roles":["metadata@v1"],"player@v1_support":{"supported_formats":[{"codec":"flac","channels":1,"sample_rate":8000,"bit_depth":16},{"codec":"pcm","channels":1,"sample_rate":8000,"bit_depth":16},{"codec":"flac","channels":2,"sample_rate":44100,"bit_depth":16},{"codec":"pcm","channels":2,"sample_rate":44100,"bit_depth":16}],"buffer_capacity":2000000,"supported_commands":["volume","mute"]},"artwork@v1_support":{"channels":[{"source":"album","format":"jpeg","media_width":256,"media_height":256}]},"device_info":{"product_name":"Conformance Dotnet Client","manufacturer":"Sendspin Conformance","software_version":"0.1.0"}}}
04:41:38 info: Sendspin.SDK.Client.SendspinClientService[0] Server hello received: sendspin-go-server (sendspin-go server), reason: playback, roles: metadata@v1
04:41:38 info: Sendspin.SDK.Client.SendspinHostService[0] Arbitration: Accepting sendspin-go-server (no existing connection)
04:41:38 info: Sendspin.SDK.Client.SendspinHostService[0] Server connected: sendspin-go-server (sendspin-go server)
04:41:38 info: Sendspin.SDK.Client.SendspinClientService[0] Sending initial client/state: {"type":"client/state","payload":{"state":"synchronized","player":{"volume":100,"muted":false}}}
04:41:39 info: Sendspin.SDK.Connection.IncomingConnection[0] Server closed connection
04:41:39 info: Sendspin.SDK.Client.SendspinHostService[0] Server disconnected: sendspin-go-server
04:41:39 info: Sendspin.SDK.Client.SendspinHostService[0] Stopping Sendspin host service
04:41:39 info: Sendspin.SDK.Discovery.MdnsServiceAdvertiser[0] Stopping mDNS advertisement for sendspin-dotnet-client-id
04:41:39 info: Sendspin.SDK.Connection.SendspinListener[0] Stopping Sendspin listener
04:41:39 info: Sendspin.SDK.Connection.SendspinListener[0] Stopping WebSocket server
04:41:39 info: Sendspin.SDK.Client.SendspinHostService[0] Sendspin host service stopped
04:41:39 info: Sendspin.SDK.Client.SendspinHostService[0] Stopping Sendspin host service
04:41:39 info: Sendspin.SDK.Client.SendspinHostService[0] Sendspin host service stopped
{
"status": "ok",
"reason": null,
"implementation": "sendspin-dotnet",
"role": "client",
"scenario_id": "server-initiated-metadata",
"initiator_role": "server",
"preferred_codec": "none",
"client_name": "sendspin-dotnet-client",
"client_id": "sendspin-dotnet-client-id",
"server": {
"server_id": "sendspin-go-server",
"server_name": "sendspin-go server",
"connection_reason": "playback"
},
"peer_hello": null,
"metadata": {
"update_count": 1,
"received": {
"title": "Almost Silent",
"artist": "Sendspin Conformance",
"album_artist": "Sendspin",
"album": "Protocol Fixtures",
"artwork_url": "https://example.invalid/almost-silent.jpg",
"year": 2026,
"track": 1,
"repeat": "all",
"shuffle": false,
"progress": {
"track_progress": 12000,
"track_duration": 180000,
"playback_speed": 1000
}
}
}
}
Server build log · sendspin-go-server · built · 0.55s
RAWNo build detail was recorded.
Client build log · sendspin-dotnet-client · built · 11.24s
RAWork=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(63,34): warning SA1618: The documentation for type parameter 'T' is missing (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1618.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(63,50): warning SA1127: Generic type constraints should be on their own line (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1127.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(37,48): warning SA1611: The documentation for parameter 'json' is missing (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1611.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(37,19): warning SA1615: Element return value should be documented (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1615.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(71,49): warning SA1611: The documentation for parameter 'json' is missing (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1611.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(71,19): warning SA1615: Element return value should be documented (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1615.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(91,61): warning SA1611: The documentation for parameter 'utf8Json' is missing (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1611.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Protocol/MessageSerializer.cs(91,19): warning SA1615: Element return value should be documented (https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/master/documentation/SA1615.md) [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.OrderingRules.SA1201ElementsMustAppearInTheCorrectOrder' threw an exception of type 'System.Collections.Generic.KeyNotFoundException' with message 'The given key 'RecordStructDeclaration' was not present in the dictionary.'. [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
/Users/runner/work/conformance/conformance/adapters/sendspin-dotnet/client/Program.cs(589,52): warning CS0067: The event 'HashingAudioPipeline.ErrorOccurred' is never used [/Users/runner/work/conformance/conformance/adapters/sendspin-dotnet/client/Conformance.SendspinDotnet.Client.csproj]
581 Warning(s)
0 Error(s)
Time Elapsed 00:00:09.84