feat(node): connection processes on by default, one per core up to four

At 1 no process starts and every lane of a download lands on the node's
one core. The Node page also sent every setting on each Save, pinning
untouched ones at the day's default; it sends only what changed.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 16 insertions, 4 deletions

diff --git a/packages/meshbay-node/tests/test_connection_processes.py b/packages/meshbay-node/tests/test_connection_processes.py
index ab9dfd3..778da5a 100644
--- a/packages/meshbay-node/tests/test_connection_processes.py
+++ b/packages/meshbay-node/tests/test_connection_processes.py
@@ -13,6 +13,7 @@ not carry.
 """
 
 import asyncio
+import re
 import struct
 from pathlib import Path
 
@@ -231,11 +232,21 @@ async def test_one_process_starts_none():
 
 # ── the setting ─────────────────────────────────────────────────────────────
 
-def test_the_default_is_one_process(tmp_path):
-    assert node_settings_defaults()["connection_processes"] == 1
+@pytest.mark.parametrize("cores, expected", [(1, 1), (2, 2), (4, 4), (28, 4)])
+def test_the_default_is_one_per_core_up_to_four(tmp_path, monkeypatch, cores, expected):
+    """It was 1, which starts none: the path was shipped and reached by no node
+    whose operator had not found the setting."""
+    monkeypatch.setattr("meshbay_node.config.max_processes", lambda: cores)
+    assert node_settings_defaults()["connection_processes"] == expected
     conf = tmp_path / "node.toml"
     conf.write_text('[hub]\nurl = "https://example.invalid"\nusername = "op"\n')
-    assert load_config(conf).node.connection_processes == 1
+    assert load_config(conf).node.connection_processes == expected
+
+
+def test_a_new_node_toml_leaves_it_to_the_default(tmp_path):
+    from meshbay_node.config import EXAMPLE_CONFIG
+    assert not re.search(r"^connection_processes\s*=", EXAMPLE_CONFIG, re.M), (
+        "a value written by `init` is a value no later default reaches")
 
 
 def test_node_toml_cannot_ask_for_more_than_the_cores(tmp_path):
@@ -296,4 +307,5 @@ async def test_a_number_the_machine_cannot_honour_is_refused(state, monkeypatch,
     with pytest.raises(ops.OpError):
         await ops.set_node_settings(state, {"connection_processes": value})
     assert state["webrtc"].asked == []
-    assert (await ops.get_node_settings(state))["connection_processes"] == 1
+    assert ((await ops.get_node_settings(state))["connection_processes"]
+            == state["config"].node.connection_processes)