Case
aiosendspin -> sendspin-dotnet
Start the server first, then the client. The client discovers or looks up the server and initiates the WebSocket connection, the server sends a metadata state update, disconnects, and the matrix compares a normalized metadata snapshot and checks that the first state carrying a metadata object bore a past or present timestamp.
Server
aiosendspin
Client
sendspin-dotnet
Status
Passed
Metadata snapshot matches
Server activation
Initial server/activate
What the aiosendspin server's own adapter recorded for its first server/activate on this connection, reported as sent. The case fails when none was sent, when its activities are not unique values from playback and pairing, or when it omits active_roles. Nothing else in it is checked against the specification: which activities and roles the matched PSK allows is not judged. A recording that cannot be read as that message is shown whole and not judged either.
Server group state
Every group/update after activation
What the aiosendspin server's own adapter recorded for each group/update it sent after its first server/activate on this connection, in order and reported as sent. The case fails when none followed, or when in any of them playback_state is not playing or stopped, or group_id or group_name is missing or not a string. How soon the first followed is not judged, because the specification says promptly and gives no bound, so one sent at any point in the case counts. Whether a change to a field produced a further message is not judged either. A recording of anything other than that message is shown whole and fails the case as a harness gap.
1 of 1
Inspection
Summaries, logs, and builds
Matrix result
RAW{
"case_dir": "artifacts/results/data/macos__client-initiated-metadata__aiosendspin__to__sendspin-dotnet",
"client_exit_code": 0,
"client_impl": "sendspin-dotnet",
"reason": "Metadata snapshot matches",
"scenario_id": "client-initiated-metadata",
"scenario_revision": 1,
"server_exit_code": 0,
"server_impl": "aiosendspin",
"status": "passed",
"unsupported": false
}Server summary (JSON)
RAW{
"activation": {
"payload": {
"active_roles": [
"metadata@v1"
],
"activities": []
},
"type": "server/activate"
},
"availability_trace": [
{
"available": true,
"type": "client/state"
}
],
"client": {
"active_roles": [
"metadata@v1"
],
"client_id": "9VqfquZEcO7WJ5-VMuCgVV_jLN4JV6bhq3MaWGPEBng",
"name": "sendspin-dotnet-client",
"supported_roles": [
"metadata@v1"
]
},
"discovery_method": "registry_advertised",
"group_updates": [
{
"payload": {
"group_id": "ac364169-a5e2-4947-bcf5-914eba5da23e",
"group_name": "sendspin-dotnet-client",
"playback_state": "stopped"
},
"type": "group/update"
}
],
"implementation": "aiosendspin",
"initiator_role": "client",
"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
},
"title": "Almost Silent",
"track": 1,
"year": 2026
},
"first_state_sent": {
"bound_us": 1171855460,
"timestamp_us": 1171855063
}
},
"peer_hello": {
"payload": {
"device_info": {
"manufacturer": "Sendspin Conformance",
"product_name": "Conformance Dotnet Client",
"software_version": "0.1.0"
},
"name": "sendspin-dotnet-client",
"supported_pair_methods": {
"pairing_psk": {}
},
"supported_roles": [
"metadata@v1"
],
"unpaired_access": {
"enabled": true
}
},
"type": "client/hello"
},
"preferred_codec": "none",
"role": "server",
"scenario_id": "client-initiated-metadata",
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"server_name": "aiosendspin server",
"status": "ok",
"time_exchange": [
{
"payload": {
"client_transmitted": 1792567688833955
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688833955,
"server_received": 1171882799,
"server_transmitted": 1171883167
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688872957
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688872957,
"server_received": 1171919243,
"server_transmitted": 1171919404
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688873665
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688873665,
"server_received": 1171919753,
"server_transmitted": 1171919819
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688873996
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688873996,
"server_received": 1171920074,
"server_transmitted": 1171920132
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688874240
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688874240,
"server_received": 1171920298,
"server_transmitted": 1171920354
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688874459
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688874459,
"server_received": 1171920517,
"server_transmitted": 1171920565
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688874647
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688874647,
"server_received": 1171920708,
"server_transmitted": 1171920765
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688874853
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688874853,
"server_received": 1171920911,
"server_transmitted": 1171920963
},
"type": "server/time"
},
{
"type": "other-sent"
}
]
}Server log
RAWINFO:aiosendspin.server.server:Starting Sendspin server on port 19061
INFO:aiosendspin.server.server:Sendspin server started successfully on 127.0.0.1:19061
WARNING:aiosendspin.server.server:No IP addresses available for mDNS advertising. Clients may not be able to discover this server. Consider specifying addresses manually via advertise_addresses.
{
"activation": {
"payload": {
"active_roles": [
"metadata@v1"
],
"activities": []
},
"type": "server/activate"
},
"availability_trace": [
{
"available": true,
"type": "client/state"
}
],
"client": {
"active_roles": [
"metadata@v1"
],
"client_id": "9VqfquZEcO7WJ5-VMuCgVV_jLN4JV6bhq3MaWGPEBng",
"name": "sendspin-dotnet-client",
"supported_roles": [
"metadata@v1"
]
},
"discovery_method": "registry_advertised",
"group_updates": [
{
"payload": {
"group_id": "ac364169-a5e2-4947-bcf5-914eba5da23e",
"group_name": "sendspin-dotnet-client",
"playback_state": "stopped"
},
"type": "group/update"
}
],
"implementation": "aiosendspin",
"initiator_role": "client",
"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
},
"title": "Almost Silent",
"track": 1,
"year": 2026
},
"first_state_sent": {
"bound_us": 1171855460,
"timestamp_us": 1171855063
}
},
"peer_hello": {
"payload": {
"device_info": {
"manufacturer": "Sendspin Conformance",
"product_name": "Conformance Dotnet Client",
"software_version": "0.1.0"
},
"name": "sendspin-dotnet-client",
"supported_pair_methods": {
"pairing_psk": {}
},
"supported_roles": [
"metadata@v1"
],
"unpaired_access": {
"enabled": true
}
},
"type": "client/hello"
},
"preferred_codec": "none",
"role": "server",
"scenario_id": "client-initiated-metadata",
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"server_name": "aiosendspin server",
"status": "ok",
"time_exchange": [
{
"payload": {
"client_transmitted": 1792567688833955
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688833955,
"server_received": 1171882799,
"server_transmitted": 1171883167
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688872957
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688872957,
"server_received": 1171919243,
"server_transmitted": 1171919404
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688873665
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688873665,
"server_received": 1171919753,
"server_transmitted": 1171919819
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688873996
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688873996,
"server_received": 1171920074,
"server_transmitted": 1171920132
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688874240
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688874240,
"server_received": 1171920298,
"server_transmitted": 1171920354
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688874459
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688874459,
"server_received": 1171920517,
"server_transmitted": 1171920565
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688874647
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688874647,
"server_received": 1171920708,
"server_transmitted": 1171920765
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 1792567688874853
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 1792567688874853,
"server_received": 1171920911,
"server_transmitted": 1171920963
},
"type": "server/time"
},
{
"type": "other-sent"
}
]
}
INFO:aiohttp.access:127.0.0.1 [21/Oct/2026:07:28:08 +0000] "GET /sendspin HTTP/1.1" 101 0 "-" "-"
Client summary (JSON)
RAW{
"client_id": "9VqfquZEcO7WJ5-VMuCgVV_jLN4JV6bhq3MaWGPEBng",
"client_name": "sendspin-dotnet-client",
"implementation": "sendspin-dotnet",
"initiator_role": "client",
"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
},
"title": "Almost Silent",
"track": 1,
"year": 2026
},
"update_count": 3
},
"peer_hello": {
"active_roles": [
"metadata@v1"
],
"name": "aiosendspin server",
"server_id": "",
"source@v1_support": {
"supported_codecs": [
"flac",
"pcm",
"opus"
]
},
"version": 1
},
"preferred_codec": "none",
"reason": null,
"role": "client",
"scenario_id": "client-initiated-metadata",
"server": {
"connection_reason": null,
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"server_name": "aiosendspin server"
},
"status": "ok"
}Client log
RAW07:28:08 info: Sendspin.SDK.Client.SendspinClientService[0] Connecting to ws://127.0.0.1:19061/sendspin
07:28:08 info: Sendspin.SDK.Connection.SendspinConnection[0] Connecting to ws://127.0.0.1:19061/sendspin...
07:28:08 info: Sendspin.SDK.Connection.SendspinConnection[0] Connected to ws://127.0.0.1:19061/sendspin
07:28:08 info: Sendspin.SDK.Client.SendspinClientService[0] Server hello received (encrypted): dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I (aiosendspin server)
07:28:08 info: Sendspin.SDK.Client.SendspinClientService[0] Sending client/hello (encrypted): {"type":"client/hello","payload":{"name":"sendspin-dotnet-client","supported_pair_methods":{"pairing_psk":{}},"unpaired_access":{"enabled":true},"supported_roles":["metadata@v1"],"device_info":{"product_name":"Conformance Dotnet Client","manufacturer":"Sendspin Conformance","software_version":"0.1.0"}}}
07:28:08 info: Sendspin.SDK.Client.SendspinClientService[0] Server activate: activities [], roles [metadata@v1]
07:28:08 info: Sendspin.SDK.Client.SendspinClientService[0] Sending initial client/state: {"type":"client/state","payload":{"available":true}}
07:28:08 info: Sendspin.SDK.Client.SendspinClientService[0] Handshake complete with server dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I (aiosendspin server)
07:28:08 info: Sendspin.SDK.Client.SendspinClientService[0] group/update [sendspin-dotnet-client]: Group name changed '(none)' -> 'sendspin-dotnet-client'
07:28:09 info: Sendspin.SDK.Connection.SendspinConnection[0] Server closed connection: NormalClosure -
{
"status": "ok",
"reason": null,
"implementation": "sendspin-dotnet",
"role": "client",
"scenario_id": "client-initiated-metadata",
"initiator_role": "client",
"preferred_codec": "none",
"client_name": "sendspin-dotnet-client",
"client_id": "9VqfquZEcO7WJ5-VMuCgVV_jLN4JV6bhq3MaWGPEBng",
"server": {
"server_id": "dsIlKLOY1OqUfE4ig1m3id0r6yr2D5_3R-FJLQZI30I",
"server_name": "aiosendspin server",
"connection_reason": null
},
"peer_hello": {
"server_id": "",
"name": "aiosendspin server",
"source@v1_support": {
"supported_codecs": [
"flac",
"pcm",
"opus"
]
},
"version": 1,
"active_roles": [
"metadata@v1"
]
},
"metadata": {
"update_count": 3,
"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,
"progress": {
"track_progress": 12000,
"track_duration": 180000,
"playback_speed": 1000
}
}
}
}
Server build log · python-adapters · built · 0.24s
RAW.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/player/audio_transformers.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/player/capabilities.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/player/events.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/player/group.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/player/types.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/player/v1.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/registry.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/scheduled_state.py'... Listing 'src/conformance/_vendor/aiosendspin/server/roles/source'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/source/__init__.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/source/events.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/source/stream.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/source/v1.py'... Listing 'src/conformance/_vendor/aiosendspin/server/roles/visualizer'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer/__init__.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer/features.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer/group.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer/packing.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer/types.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer/v1.py'... Listing 'src/conformance/_vendor/aiosendspin/server/roles/visualizer_draft_r1'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer_draft_r1/__init__.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer_draft_r1/features.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer_draft_r1/packing.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/roles/visualizer_draft_r1/role.py'... Compiling 'src/conformance/_vendor/aiosendspin/server/server.py'... Compiling 'src/conformance/_vendor/aiosendspin/util.py'... Listing 'src/conformance/adapters'... Compiling 'src/conformance/adapters/__init__.py'... Compiling 'src/conformance/adapters/_aiosendspin_pairing.py'... Compiling 'src/conformance/adapters/_aiosendspin_protocol_evidence.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/flac.py'... Compiling 'src/conformance/merge.py'... Compiling 'src/conformance/pcm.py'... Compiling 'src/conformance/registry.py'... Listing 'src/conformance/validator'... Compiling 'src/conformance/validator/__init__.py'... Compiling 'src/conformance/validator/checks.py'... Compiling 'src/conformance/validator/cli.py'... Compiling 'src/conformance/validator/code_pairing.py'... Compiling 'src/conformance/validator/code_pairing_checks.py'... Compiling 'src/conformance/validator/discovery.py'... Compiling 'src/conformance/validator/findings.py'... Compiling 'src/conformance/validator/noncompliance_refs.py'... Compiling 'src/conformance/validator/prompter.py'... Compiling 'src/conformance/validator/recorder.py'... Compiling 'src/conformance/validator/report.py'... Compiling 'src/conformance/validator/session.py'... Compiling 'src/conformance/validator/storage.py'... Compiling 'src/conformance/validator/suite_checks.py'... Compiling 'src/conformance/validator/suites.py'... Listing 'src/sendspin_conformance.egg-info'... Listing 'scripts'... Compiling 'scripts/detect_regressions.py'... Compiling 'scripts/merge_results.py'... Compiling 'scripts/run_all.py'... Compiling 'scripts/setup_repositories.py'... Compiling 'scripts/setup_workspace.py'... Compiling 'scripts/vendor_aiosendspin.py'...
Client build log · sendspin-dotnet-client · built · 17.06s
RAWSDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.LayoutRules.SA1500BracesForMultiLineStatementsMustNotShareLine' threw an exception of type 'System.NullReferenceException' with message 'Object reference not set to an instance of an object.'. [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.LayoutRules.SA1502ElementMustNotBeOnASingleLine' threw an exception of type 'System.NullReferenceException' with message 'Object reference not set to an instance of an object.'. [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.LayoutRules.SA1508ClosingBracesMustNotBePrecededByBlankLine' threw an exception of type 'System.NullReferenceException' with message 'Object reference not set to an instance of an object.'. [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.LayoutRules.SA1500BracesForMultiLineStatementsMustNotShareLine' threw an exception of type 'System.NullReferenceException' with message 'Object reference not set to an instance of an object.'. [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.LayoutRules.SA1502ElementMustNotBeOnASingleLine' threw an exception of type 'System.NullReferenceException' with message 'Object reference not set to an instance of an object.'. [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.LayoutRules.SA1508ClosingBracesMustNotBePrecededByBlankLine' threw an exception of type 'System.NullReferenceException' with message 'Object reference not set to an instance of an object.'. [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.LayoutRules.SA1500BracesForMultiLineStatementsMustNotShareLine' threw an exception of type 'System.NullReferenceException' with message 'Object reference not set to an instance of an object.'. [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.LayoutRules.SA1502ElementMustNotBeOnASingleLine' threw an exception of type 'System.NullReferenceException' with message 'Object reference not set to an instance of an object.'. [/Users/runner/work/conformance/conformance/repos/sendspin-dotnet/src/Sendspin.SDK/Sendspin.SDK.csproj::TargetFramework=net10.0]
CSC : warning AD0001: Analyzer 'StyleCop.Analyzers.LayoutRules.SA1508ClosingBracesMustNotBePrecededByBlankLine' threw an exception of type 'System.NullReferenceException' with message 'Object reference not set to an instance of an object.'. [/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(607,52): warning CS0067: The event 'HashingAudioPipeline.ErrorOccurred' is never used [/Users/runner/work/conformance/conformance/adapters/sendspin-dotnet/client/Conformance.SendspinDotnet.Client.csproj]
/Users/runner/work/conformance/conformance/adapters/sendspin-dotnet/client/Program.cs(608,37): warning CS0067: The event 'HashingAudioPipeline.OutputLatencyChanged' is never used [/Users/runner/work/conformance/conformance/adapters/sendspin-dotnet/client/Conformance.SendspinDotnet.Client.csproj]
1228 Warning(s)
0 Error(s)
Time Elapsed 00:00:16.04