Case
sendspin-go -> SendspinKit
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
SendspinKit
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__SendspinKit",
"client_exit_code": 0,
"client_impl": "SendspinKit",
"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": "SendspinKit-client-id",
"name": "SendspinKit-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": {
"client_id": "SendspinKit-client-id",
"device_info": {
"manufacturer": "Apple",
"productName": "Mac",
"softwareVersion": "Version 15.7.4 (Build 24G517)"
},
"name": "SendspinKit-client",
"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": "SendspinKit-client-id",
"name": "SendspinKit-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": {
"client_id": "SendspinKit-client-id",
"device_info": {
"manufacturer": "Apple",
"productName": "Mac",
"softwareVersion": "Version 15.7.4 (Build 24G517)"
},
"name": "SendspinKit-client",
"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": "SendspinKit-client-id",
"client_name": "SendspinKit-client",
"implementation": "SendspinKit",
"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": {
"payload": {
"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-metadata",
"server": {
"connection_reason": "playback",
"name": "sendspin-go server",
"server_id": "sendspin-go-server",
"version": 1
},
"status": "ok"
}Client log
RAW[ADAPTER] Listening for server connection on ws://127.0.0.1:19974/sendspin
[ADAPTER] Connected to server: sendspin-go server
[ADAPTER] Metadata: Almost Silent
{
"client_id" : "SendspinKit-client-id",
"client_name" : "SendspinKit-client",
"implementation" : "SendspinKit",
"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" : {
"payload" : {
"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-metadata",
"server" : {
"connection_reason" : "playback",
"name" : "sendspin-go server",
"server_id" : "sendspin-go-server",
"version" : 1
},
"status" : "ok"
}
[ADAPTER] Summary written to artifacts/results/data/macos__server-initiated-metadata__sendspin-go__to__SendspinKit/client-summary.json
Server build log · sendspin-go-server · built · 1.01s
RAWNo build detail was recorded.
Client build log · SendspinKit-client · built · 44.65s
RAWmpiling SendspinKit MonotonicClock.swift
[207/215] Compiling SendspinKit SendspinTimeFilter.swift
[208/215] Compiling SendspinKit TimeFilterSnapshot.swift
[209/215] Compiling SendspinKit NWWebSocketTransport.swift
[210/215] Compiling SendspinKit SendspinEncoding.swift
[211/215] Compiling SendspinKit SendspinTransport.swift
[212/215] Compiling SendspinKit WebSocketTransport.swift
[213/217] Compiling ConformanceSendspinKitClient main.swift
/Users/runner/work/conformance/conformance/adapters/SendspinKit/client/Sources/ConformanceSendspinKitClient/main.swift:176:13: warning: variable 'copy' was never mutated; consider changing to 'let' constant
174 |
175 | func hexdigest() -> String {
176 | var copy = hasher
| `- warning: variable 'copy' was never mutated; consider changing to 'let' constant
177 | return copy.finalize().map { String(format: "%02x", $0) }.joined()
178 | }
/Users/runner/work/conformance/conformance/adapters/SendspinKit/client/Sources/ConformanceSendspinKitClient/main.swift:236:13: warning: variable 'copy' was never mutated; consider changing to 'let' constant
234 |
235 | func hexdigest() -> String {
236 | var copy = hasher
| `- warning: variable 'copy' was never mutated; consider changing to 'let' constant
237 | return copy.finalize().map { String(format: "%02x", $0) }.joined()
238 | }
[214/217] Emitting module ConformanceSendspinKitClient
[214/217] Write Objects.LinkFileList
[215/217] Linking ConformanceSendspinKitClient
[216/217] Applying ConformanceSendspinKitClient
Build complete! (39.10s)
Fetching https://github.com/sbooth/flac-binary-xcframework.git
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Creating working copy for https://github.com/daltoniam/Starscream.git
Working copy of https://github.com/daltoniam/Starscream.git resolved at 4.0.8
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Working copy of https://github.com/sbooth/ogg-binary-xcframework.git resolved at 0.1.3
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Working copy of https://github.com/sbooth/flac-binary-xcframework.git resolved at 0.2.0
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Working copy of https://github.com/alta/swift-opus.git resolved at 0.0.2
Downloading binary artifact https://github.com/sbooth/ogg-binary-xcframework/releases/download/0.1.3/ogg.xcframework.zip
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warning: 'starscream': found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target
/Users/runner/work/conformance/conformance/adapters/SendspinKit/client/.build/checkouts/Starscream/Sources/Info.plist