Merge branch 'rc' into sy-4331-move-most-channel-functionality-to-service-layer

# Conflicts:
#	aspen/internal/kv/config.go
#	aspen/internal/kv/version.go
#	core/cmd/start/start.go
#	core/pkg/api/arc/arc_suite_test.go
#	core/pkg/distribution/channel/counter.go
#	core/pkg/distribution/channel/create_test.go
#	core/pkg/distribution/channel/delete_test.go
#	core/pkg/distribution/channel/limit_test.go
#	core/pkg/distribution/channel/pb/services.pb.go
#	core/pkg/distribution/channel/pb/services.proto
#	core/pkg/distribution/channel/pb/services_grpc.pb.go
#	core/pkg/distribution/channel/rename_test.go
#	core/pkg/distribution/channel/service.go
#	core/pkg/distribution/channel/service_test.go
#	core/pkg/distribution/channel/transport.go
#	core/pkg/distribution/framer/codec/codec_test.go
#	core/pkg/distribution/framer/deleter/deleter_test.go
#	core/pkg/distribution/framer/deleter/lease_proxy.go
#	core/pkg/distribution/framer/iterator/iterator_test.go
#	core/pkg/distribution/framer/iterator/service.go
#	core/pkg/distribution/framer/relay/relay_test.go
#	core/pkg/distribution/framer/relay/transport.go
#	core/pkg/distribution/framer/writer/service.go
#	core/pkg/distribution/framer/writer/transport.go
#	core/pkg/distribution/framer/writer/writer_test.go
#	core/pkg/distribution/layer.go
#	core/pkg/distribution/mock/cluster.go
#	core/pkg/distribution/mock/cluster_test.go
#	core/pkg/distribution/mock/node.go
#	core/pkg/distribution/mock/node_test.go
#	core/pkg/distribution/mock/static_host_provider.go
#	core/pkg/distribution/mock/static_host_provider_test.go
#	core/pkg/distribution/proxy/proxy.go
#	core/pkg/distribution/proxy/proxy_test.go
#	core/pkg/distribution/transport/grpc/channel/channel_suite_test.go
#	core/pkg/distribution/transport/grpc/channel/transport.go
#	core/pkg/distribution/transport/grpc/channel/transport_test.go
#	core/pkg/distribution/transport/grpc/framer/framer_suite_test.go
#	core/pkg/distribution/transport/grpc/framer/transport.go
#	core/pkg/distribution/transport/grpc/framer/transport_test.go
#	core/pkg/distribution/transport/grpc/grpc_suite_test.go
#	core/pkg/service/actions/actions_suite_test.go
#	core/pkg/service/actions/signals_test.go
#	core/pkg/service/arc/arc_suite_test.go
#	core/pkg/service/arc/rename_test.go
#	core/pkg/service/arc/runtime/dependencies_test.go
#	core/pkg/service/arc/service_test.go
#	core/pkg/service/arc/task/task_test.go
#	core/pkg/service/channel/calculation/compiler/compile_test.go
#	core/pkg/service/channel/calculation/graph/graph_test.go
#	core/pkg/service/channel/channel_suite_test.go
#	core/pkg/service/channel/channel_test.go
#	core/pkg/service/channel/ontology_test.go
#	core/pkg/service/channel/resolver_test.go
#	core/pkg/service/channel/retrieve_test.go
#	core/pkg/service/channel/signals/signals_suite_test.go
#	core/pkg/service/channel/signals/signals_test.go
#	core/pkg/service/driver/driver_suite_test.go
#	core/pkg/service/framer/calculation/calculator/bench_test.go
#	core/pkg/service/framer/calculation/calculator/calculator_test.go
#	core/pkg/service/framer/calculation/graph/graph_test.go
#	core/pkg/service/framer/calculation/service_test.go
#	core/pkg/service/framer/iterator/bench_test.go
#	core/pkg/service/framer/iterator/iterator_test.go
#	core/pkg/service/framer/streamer/bench_test.go
#	core/pkg/service/framer/streamer/streamer_test.go
#	core/pkg/service/log/service_test.go
#	core/pkg/service/metrics/metrics_suite_test.go
#	core/pkg/service/node/ontology_test.go
#	core/pkg/service/ontology/signals/signals_suite_test.go
#	core/pkg/service/ontology/signals/signals_test.go
#	core/pkg/service/panel/panel_suite_test.go
#	core/pkg/service/panel/signals_test.go
#	core/pkg/service/ranger/alias/alias_test.go
#	core/pkg/service/signals/publisher_test.go
#	core/pkg/service/signals/signals_suite_test.go
#	core/pkg/transport/grpc/framer/framer_suite_test.go
#	core/pkg/transport/grpc/grpc_suite_test.go
#	core/pkg/transport/http/framer/framer_suite_test.go
#	core/pkg/transport/http/http_suite_test.go
#	core/pkg/transport/transport_suite_test.go
#	x/go/kv/counter_test.go
#	x/go/kv/tx_test.go

Author: pjdotson

.github/workflows/test.freighter.yaml

@@ -112,7 +112,7 @@ jobs:
       packages: write
     with:
       module: freighter/integration
-      tag: ghcr.io/synnaxlabs/freighter-go-integration:latest
+      tag: ghcr.io/synnaxlabs/freighter-go-integration:${{ github.sha }}
 
   py:
     name: Test - Python
@@ -123,7 +123,7 @@ jobs:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
     services:
       integration:
-        image: ghcr.io/synnaxlabs/freighter-go-integration:latest
+        image: ghcr.io/synnaxlabs/freighter-go-integration:${{ github.sha }}
         credentials:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
@@ -152,7 +152,7 @@ jobs:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
     services:
       integration:
-        image: ghcr.io/synnaxlabs/freighter-go-integration:latest
+        image: ghcr.io/synnaxlabs/freighter-go-integration:${{ github.sha }}
         credentials:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}

aspen/internal/kv/config.go

@@ -81,7 +81,7 @@ func (cfg Config) Override(other Config) Config {
 
 // Validate implements config.Config.
 func (cfg Config) Validate() error {
-	v := validate.New("aspen.kv")
+	v := validate.New("aspen.kv.db")
 	validate.NotNil(v, "cluster", cfg.Cluster)
 	validate.NotNil(v, "tx_transport_client", cfg.BatchTransportClient)
 	validate.NotNil(v, "tx_transport_server", cfg.BatchTransportServer)

aspen/options.go

@@ -186,7 +186,7 @@ func mergeDefaultOptions(o *options) {
 	// provide their own transport. Otherwise the eagerly-created pool would
 	// leak: nothing would reference it and nothing would close it.
 	if o.transport.Transport == nil {
-		pool := fgrpc.NewPool("", grpc.WithTransportCredentials(insecure.NewCredentials()))
+		pool := fgrpc.OpenPool("", grpc.WithTransportCredentials(insecure.NewCredentials()))
 		o.transport.ownedPool = pool
 		o.transport.Transport = grpct.New(pool)
 	}

client/py/pyproject.toml

@@ -84,6 +84,7 @@ markers = [
     "framer: mark test as a framer test",
     "http: mark test as an http test",
     "group: mark test as a group test",
+    "imex: mark test as an imex test",
     "frame_codec: mark test as a frame codec test",
     "iterator: mark test as a reader test",
     "internal: mark test as an internal test",

client/py/synnax/framer/codec.py

@@ -12,11 +12,11 @@
 import struct
 
 import synnax.channel.payload as channel
-from freighter import JSONCodec
-from freighter.codec import Codec as FreighterCodec
 from synnax.exceptions import ValidationError
 from synnax.framer.frame import Frame, FramePayload
 from synnax.telem import Alignment, DataType, Series, TimeRange
+from x.codec import Codec as XCodec
+from x.codec import JSONCodec
 
 ZERO_ALIGNMENTS_FLAG_POS = 5
 EQUAL_ALIGNMENTS_FLAG_POS = 4
@@ -334,13 +334,12 @@ def decode_series(key: channel.Key) -> bool:
 
 LOW_PERF_SPECIAL_CHAR = 254
 HIGH_PERF_SPECIAL_CHAR = 255
-CONTENT_TYPE = "application/vnd.synnax.frame"
 
 
-class WSFramerCodec(FreighterCodec):
+class WSFramerCodec(XCodec):
     def __init__(self, codec: Codec) -> None:
         self.codec = codec
         self.lower_perf_codec = JSONCodec()
 
     def content_type(self) -> str:
-        return CONTENT_TYPE
+        return "application/vnd.synnax.frame"

client/py/synnax/imex/__init__.py

@@ -0,0 +1,14 @@
+#  Copyright 2026 Synnax Labs, Inc.
+#
+#  Use of this software is governed by the Business Source License included in the file
+#  licenses/BSL.txt.
+#
+#  As of the Change Date specified in that file, in accordance with the Business Source
+#  License, use of this software will be governed by the Apache License, Version 2.0,
+#  included in the file licenses/APL.txt.
+
+from synnax.imex.client import Client
+
+__all__ = [
+    "Client",
+]

client/py/synnax/imex/client.py

@@ -0,0 +1,46 @@
+#  Copyright 2026 Synnax Labs, Inc.
+#
+#  Use of this software is governed by the Business Source License included in the file
+#  licenses/BSL.txt.
+#
+#  As of the Change Date specified in that file, in accordance with the Business Source
+#  License, use of this software will be governed by the Apache License, Version 2.0,
+#  included in the file licenses/APL.txt.
+
+
+from freighter import FileTransport
+from synnax import ontology
+from x.fs import FilePath
+
+
+class Client:
+    """Imports and exports resources from and to the Core.
+
+    Each call moves exactly one envelope, streamed to or from disk: ``import_`` streams
+    a file from disk, and ``export`` streams the response straight into a destination
+    file.
+    """
+
+    _file_transport: FileTransport
+
+    def __init__(self, file_transport: FileTransport) -> None:
+        self._file_transport = file_transport
+
+    def import_(self, source: FilePath) -> ontology.ID:
+        """Imports the resource at source and returns its new ontology ID.
+
+        :param source: a file path streamed from disk.
+        :returns: the new resource's ontology ID.
+        """
+        return self._file_transport.upload("/imex/import", source, ontology.ID)
+
+    def export(self, id: ontology.ID, dest: FilePath) -> None:
+        """Exports the resource identified by id, streaming it into dest.
+
+        The response body is streamed straight into dest — the on-disk format is driven
+        by the destination's extension.
+
+        :param id: the ontology ID of the resource to export.
+        :param dest: a file path to stream the response body into.
+        """
+        self._file_transport.download("/imex/export", id, dest)

client/py/synnax/synnax.py

@@ -22,6 +22,7 @@
     device,
     framer,
     group,
+    imex,
     ontology,
     project,
     rack,
@@ -75,6 +76,7 @@ class Synnax(framer.Client):
     arcs: arc.Client
     groups: group.Client
     views: view.Client
+    imex: imex.Client
     projects: project.Client
 
     _transport: Transport
@@ -167,6 +169,7 @@ def __init__(
         self.racks = rack.Client(client=self._transport.unary)
         self.devices = device.Client(client=self._transport.unary)
         self.views = view.Client(client=self._transport.unary)
+        self.imex = imex.Client(file_transport=self._transport.file_transport)
         self.projects = project.Client(client=self._transport.unary)
         self.tasks = task.Client(
             client=self._transport.unary,

client/py/synnax/transport.py

@@ -14,22 +14,24 @@
     URL,
     AsyncMiddleware,
     AsyncWebsocketClient,
+    FileTransport,
     HTTPClient,
-    JSONCodec,
     Middleware,
     UnaryClient,
     WebsocketClient,
     async_instrumentation_middleware,
     instrumentation_middleware,
 )
 from synnax.telem import Size, TimeSpan
+from x.codec import JSONCodec
 
 
 class Transport:
     url: URL
     stream: WebsocketClient
     stream_async: AsyncWebsocketClient
     unary: UnaryClient
+    file_transport: FileTransport
     secure: bool
 
     def __init__(
@@ -53,18 +55,20 @@ def __init__(
             "close_timeout": read_timeout.seconds,
         }
         self.stream = WebsocketClient(**ws_args)
-        # We need to update these here because the websocket client doesn't support
-        # the same arguments as the async websocket client.
+        # We need to update these here because the WebSocket client doesn't support the
+        # same arguments as the async WebSocket client.
         ws_args["ping_interval"] = keep_alive.seconds
         ws_args["ping_timeout"] = 180
         self.stream_async = AsyncWebsocketClient(**ws_args)
-        self.unary = HTTPClient(
+        http = HTTPClient(
             url=self.url,
             codec=codec,
             secure=secure,
             timeout=Timeout(connect=open_timeout.seconds, read=read_timeout.seconds),
             retries=Retry(total=max_retries),
         )
+        self.unary = http
+        self.file_transport = http
         self.use(instrumentation_middleware(instrumentation))
         self.use_async(async_instrumentation_middleware(instrumentation))
 

client/py/tests/test_imex.py

@@ -0,0 +1,85 @@
+#  Copyright 2026 Synnax Labs, Inc.
+#
+#  Use of this software is governed by the Business Source License included in the file
+#  licenses/BSL.txt.
+#
+#  As of the Change Date specified in that file, in accordance with the Business Source
+#  License, use of this software will be governed by the Apache License, Version 2.0,
+#  included in the file licenses/APL.txt.
+
+
+import json
+import uuid
+from pathlib import Path
+
+import pytest
+
+import synnax as sy
+
+
+def _log_envelope_json(name: str) -> str:
+    """A minimal valid v1 log envelope, matching core's testdata/import_v1.json."""
+    return json.dumps(
+        {
+            "version": 1,
+            "type": "log",
+            "name": name,
+            "channels": [
+                {
+                    "channel": 1,
+                    "color": "red",
+                    "notation": "scientific",
+                    "precision": 2,
+                    "alias": "temp",
+                }
+            ],
+            "remote_created": False,
+            "timestamp_precision": 1,
+            "show_channel_names": True,
+            "show_receipt_timestamp": False,
+        }
+    )
+
+
+@pytest.mark.imex
+class TestImex:
+    """Round-trip imex against a live Synnax Core.
+
+    Uses the ``log`` resource type.
+    """
+
+    def test_import_valid(self, client: sy.Synnax, tmp_path: Path) -> None:
+        """Path source → streamed upload."""
+        name = f"imex-path-{uuid.uuid4()}"
+        path = tmp_path / "in.json"
+        path.write_text(_log_envelope_json(name))
+        id = client.imex.import_(path)
+        assert id.type == "log"
+        assert uuid.UUID(id.key)
+
+    def test_import_invalid(self, client: sy.Synnax, tmp_path: Path) -> None:
+        """An envelope with an unrecognized type is rejected."""
+        path = tmp_path / "in.json"
+        path.write_text(
+            json.dumps({"version": 1, "type": "not_a_real_type", "name": "bad"})
+        )
+        with pytest.raises(sy.ValidationError):
+            client.imex.import_(path)
+
+    def test_export(self, client: sy.Synnax, tmp_path: Path) -> None:
+        """Path dest → streamed download; on-disk content parses back."""
+        name = f"imex-export-path-{uuid.uuid4()}"
+        src = tmp_path / "in.json"
+        src.write_text(_log_envelope_json(name))
+        id = client.imex.import_(src)
+        out = tmp_path / "log.json"
+        client.imex.export(id, out)
+        parsed = json.loads(out.read_bytes())
+        assert parsed["name"] == name and parsed["type"] == "log"
+
+    def test_export_nonexistent(self, client: sy.Synnax, tmp_path: Path) -> None:
+        """Exporting a resource that does not exist raises NotFoundError."""
+        id = sy.ontology.ID(type="log", key=str(uuid.uuid4()))
+        out = tmp_path / "log.json"
+        with pytest.raises(sy.NotFoundError):
+            client.imex.export(id, out)