Case
aiosendspin -> sendspin-js
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-js
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-js",
"client_exit_code": 0,
"client_impl": "sendspin-js",
"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": [
"player@v1",
"controller@v1",
"metadata@v1"
],
"activities": []
},
"type": "server/activate"
},
"availability_trace": [
{
"available": true,
"type": "client/state"
}
],
"client": {
"active_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
],
"client_id": "Ceb_J1X2aMIFf_39D6LgszzEFcTLNItIx1ne8wQYKV0",
"name": "sendspin-js-client",
"supported_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
]
},
"discovery_method": "registry_advertised",
"group_updates": [
{
"payload": {
"group_id": "af9b4b11-db18-4994-b410-20a77afa40f6",
"group_name": "sendspin-js-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": 1174298496,
"timestamp_us": 1174298073
}
},
"peer_hello": {
"payload": {
"device_info": {
"manufacturer": "Unknown",
"software_version": "Node.js/22"
},
"legacy_pair_methods_list_used": true,
"name": "sendspin-js-client",
"player@v1_support": {
"buffer_capacity": 5760000,
"supported_commands": [
"volume",
"mute"
],
"supported_formats": [
{
"bit_depth": 16,
"channels": 2,
"codec": "pcm",
"sample_rate": 48000
},
{
"bit_depth": 16,
"channels": 2,
"codec": "pcm",
"sample_rate": 44100
}
]
},
"supported_pair_methods": {},
"supported_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
],
"trust_level_used": true,
"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": 213263
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 213263,
"server_received": 1174302786,
"server_transmitted": 1174303336
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 218000
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 218000,
"server_received": 1174304795,
"server_transmitted": 1174304925
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 219564
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 219564,
"server_received": 1174306854,
"server_transmitted": 1174307010
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 220985
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 220985,
"server_received": 1174307637,
"server_transmitted": 1174307877
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 221884
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 221884,
"server_received": 1174308644,
"server_transmitted": 1174308804
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 222857
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 222857,
"server_received": 1174309569,
"server_transmitted": 1174309801
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 223895
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 223895,
"server_received": 1174310697,
"server_transmitted": 1174310815
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 224744
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 224744,
"server_received": 1174311306,
"server_transmitted": 1174311400
},
"type": "server/time"
},
{
"type": "other-sent"
}
]
}Server log
RAWINFO:aiosendspin.server.server:Starting Sendspin server on port 19062
INFO:aiosendspin.server.server:Sendspin server started successfully on 127.0.0.1:19062
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.
WARNING:aiosendspin.server.connection.Ceb_J1X2aMIFf_39D6LgszzEFcTLNItIx1ne8wQYKV0:non-compliant client sendspin-js-client (Unknown, software Node.js/22): client/hello declared player supported_commands, superseded by client/state
WARNING:aiosendspin.server.connection.Ceb_J1X2aMIFf_39D6LgszzEFcTLNItIx1ne8wQYKV0:non-compliant client sendspin-js-client (Unknown, software Node.js/22): client/hello sent the removed trust_level key
WARNING:aiosendspin.server.connection.Ceb_J1X2aMIFf_39D6LgszzEFcTLNItIx1ne8wQYKV0:non-compliant client sendspin-js-client (Unknown, software Node.js/22): client/hello sent supported_pair_methods as a list
WARNING:aiosendspin.server.connection.Ceb_J1X2aMIFf_39D6LgszzEFcTLNItIx1ne8wQYKV0:non-compliant client sendspin-js-client (Unknown, software Node.js/22): client/hello did not offer the pairing_psk method
WARNING:aiosendspin.server.client.Ceb_J1X2aMIFf_39D6LgszzEFcTLNItIx1ne8wQYKV0:non-compliant client sendspin-js-client (Unknown, software Node.js/22): client/state used the pre-rename 'static_delay_ms' key
WARNING:aiosendspin.server.client.Ceb_J1X2aMIFf_39D6LgszzEFcTLNItIx1ne8wQYKV0:non-compliant client sendspin-js-client (Unknown, software Node.js/22): client/state declared the pre-rename 'set_static_delay' command
{
"activation": {
"payload": {
"active_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
],
"activities": []
},
"type": "server/activate"
},
"availability_trace": [
{
"available": true,
"type": "client/state"
}
],
"client": {
"active_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
],
"client_id": "Ceb_J1X2aMIFf_39D6LgszzEFcTLNItIx1ne8wQYKV0",
"name": "sendspin-js-client",
"supported_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
]
},
"discovery_method": "registry_advertised",
"group_updates": [
{
"payload": {
"group_id": "af9b4b11-db18-4994-b410-20a77afa40f6",
"group_name": "sendspin-js-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": 1174298496,
"timestamp_us": 1174298073
}
},
"peer_hello": {
"payload": {
"device_info": {
"manufacturer": "Unknown",
"software_version": "Node.js/22"
},
"legacy_pair_methods_list_used": true,
"name": "sendspin-js-client",
"player@v1_support": {
"buffer_capacity": 5760000,
"supported_commands": [
"volume",
"mute"
],
"supported_formats": [
{
"bit_depth": 16,
"channels": 2,
"codec": "pcm",
"sample_rate": 48000
},
{
"bit_depth": 16,
"channels": 2,
"codec": "pcm",
"sample_rate": 44100
}
]
},
"supported_pair_methods": {},
"supported_roles": [
"player@v1",
"controller@v1",
"metadata@v1"
],
"trust_level_used": true,
"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": 213263
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 213263,
"server_received": 1174302786,
"server_transmitted": 1174303336
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 218000
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 218000,
"server_received": 1174304795,
"server_transmitted": 1174304925
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 219564
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 219564,
"server_received": 1174306854,
"server_transmitted": 1174307010
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 220985
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 220985,
"server_received": 1174307637,
"server_transmitted": 1174307877
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 221884
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 221884,
"server_received": 1174308644,
"server_transmitted": 1174308804
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 222857
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 222857,
"server_received": 1174309569,
"server_transmitted": 1174309801
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 223895
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 223895,
"server_received": 1174310697,
"server_transmitted": 1174310815
},
"type": "server/time"
},
{
"payload": {
"client_transmitted": 224744
},
"type": "client/time"
},
{
"payload": {
"client_transmitted": 224744,
"server_received": 1174311306,
"server_transmitted": 1174311400
},
"type": "server/time"
},
{
"type": "other-sent"
}
]
}
INFO:aiohttp.access:127.0.0.1 [21/Oct/2026:07:28:11 +0000] "GET /sendspin HTTP/1.1" 101 0 "-" "-"
Client summary (JSON)
RAW{
"client_id": "sendspin-js-client-id",
"client_name": "sendspin-js-client",
"implementation": "sendspin-js",
"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": 2
},
"peer_hello": null,
"preferred_codec": "none",
"role": "client",
"scenario_id": "client-initiated-metadata",
"server": null,
"status": "ok"
}Client log
RAW[Opus] Native decoder not available, falling back to FLAC/PCM
Sendspin: no storage provided, using an ephemeral identity (client_id changes each session, pairing unavailable)
Sendspin: Adopted WebSocket connected
Sendspin: Connected to server
[Opus] Native decoder not available, falling back to FLAC/PCM
Sendspin: WebSocket disconnected
Sendspin: Connection closed
{
"status": "ok",
"implementation": "sendspin-js",
"role": "client",
"scenario_id": "client-initiated-metadata",
"initiator_role": "client",
"preferred_codec": "none",
"client_id": "sendspin-js-client-id",
"client_name": "sendspin-js-client",
"peer_hello": null,
"server": null,
"metadata": {
"update_count": 2,
"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-js-adapters · built · 97.70s
RAWNo build detail was recorded.