Case
aiosendspin -> sendspin-rs
Start the server first, then the client. The client connects, advertises two PCM formats (24-bit then 16-bit), and the server starts streaming the higher-priority 24-bit format. The client then sends a client/state whose player format prefers the 16-bit entry. The matrix verifies the server received that preference in client/state and the client observed a new stream/start in the 16-bit format.
Server
aiosendspin
Client
sendspin-rs
Status
Failed
Server adapter reported: Timed out waiting for client 'sendspin-rs-client'; Client adapter reported: Failed to connect to ws://127.0.0.1:19039/sendspin: Protocol error: unknown variant `server/error`, expected one of `client/hello`, `server/hello`, `client/time`, `server/time`, `client/state`, `server/state`, `server/command`, `client/command`, `stream/start`, `stream/end`, `stream/clear`, `stream/request-format`, `group/update`, `client/goodbye` at line 1 column 55
Inspection
Summaries, logs, and builds
Matrix result
RAW{
"case_dir": "artifacts/results/data/macos__client-initiated-state-format-pcm__aiosendspin__to__sendspin-rs",
"client_exit_code": 1,
"client_impl": "sendspin-rs",
"reason": "Server adapter reported: Timed out waiting for client 'sendspin-rs-client'; Client adapter reported: Failed to connect to ws://127.0.0.1:19039/sendspin: Protocol error: unknown variant `server/error`, expected one of `client/hello`, `server/hello`, `client/time`, `server/time`, `client/state`, `server/state`, `server/command`, `client/command`, `stream/start`, `stream/end`, `stream/clear`, `stream/request-format`, `group/update`, `client/goodbye` at line 1 column 55",
"scenario_id": "client-initiated-state-format-pcm",
"scenario_revision": 5,
"server_exit_code": 1,
"server_impl": "aiosendspin",
"status": "failed",
"unsupported": false
}Server summary (JSON)
RAW{
"implementation": "aiosendspin",
"reason": "Timed out waiting for client 'sendspin-rs-client'",
"role": "server",
"scenario_id": "client-initiated-state-format-pcm",
"status": "error"
}Server log
RAWINFO:aiosendspin.server.server:Starting Sendspin server on port 19039 INFO:aiosendspin.server.server:Sendspin server started successfully on 127.0.0.1:19039 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.server:Refused unencrypted legacy connection from 127.0.0.1 (transition mode is off) INFO:aiohttp.access:127.0.0.1 [21/Oct/2026:07:26:26 +0000] "GET /sendspin HTTP/1.1" 101 0 "-" "-"
Client summary (JSON)
RAW{
"audio": {
"audio_chunk_count": 0,
"received_encoded_sha256": null,
"received_pcm_sha256": null,
"received_sample_count": 0
},
"client_id": "sendspin-rs-client-id",
"client_name": "sendspin-rs-client",
"implementation": "sendspin-rs",
"initiator_role": "client",
"peer_hello": null,
"preferred_codec": "pcm",
"reason": "Failed to connect to ws://127.0.0.1:19039/sendspin: Protocol error: unknown variant `server/error`, expected one of `client/hello`, `server/hello`, `client/time`, `server/time`, `client/state`, `server/state`, `server/command`, `client/command`, `stream/start`, `stream/end`, `stream/clear`, `stream/request-format`, `group/update`, `client/goodbye` at line 1 column 55",
"role": "client",
"scenario_id": "client-initiated-state-format-pcm",
"server": null,
"status": "error",
"stream": null
}Client log
RAWFailed to connect to ws://127.0.0.1:19039/sendspin: Protocol error: unknown variant `server/error`, expected one of `client/hello`, `server/hello`, `client/time`, `server/time`, `client/state`, `server/state`, `server/command`, `client/command`, `stream/start`, `stream/end`, `stream/clear`, `stream/request-format`, `group/update`, `client/goodbye` at line 1 column 55
{"audio":{"audio_chunk_count":0,"received_encoded_sha256":null,"received_pcm_sha256":null,"received_sample_count":0},"client_id":"sendspin-rs-client-id","client_name":"sendspin-rs-client","implementation":"sendspin-rs","initiator_role":"client","peer_hello":null,"preferred_codec":"pcm","reason":"Failed to connect to ws://127.0.0.1:19039/sendspin: Protocol error: unknown variant `server/error`, expected one of `client/hello`, `server/hello`, `client/time`, `server/time`, `client/state`, `server/state`, `server/command`, `client/command`, `stream/start`, `stream/end`, `stream/clear`, `stream/request-format`, `group/update`, `client/goodbye` at line 1 column 55","role":"client","scenario_id":"client-initiated-state-format-pcm","server":null,"status":"error","stream":null}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-rs-client · built · 27.81s
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