fix(honcho): plugin drift overhaul -- observation config, chunking, setup wizard, docs, dead code cleanup

Salvaged from PR #5045 by erosika.

- Replace memoryMode/peer_memory_modes with granular per-peer observation config
- Add message chunking for Honcho API limits (25k chars default)
- Add dialectic input guard (10k chars default)
- Add dialecticDynamic toggle for reasoning level auto-bump
- Rewrite setup wizard with cloud/local deployment picker
- Switch peer card/profile/search from session.context() to direct peer APIs
- Add server-side observation sync via get_peer_configuration()
- Fix base_url/baseUrl config mismatch for self-hosted setups
- Fix local auth leak (cloud API keys no longer sent to local instances)
- Remove dead code: memoryMode, peer_memory_modes, linkedHosts, suppress flags, SOUL.md aiPeer sync
- Add post_setup hook to memory_setup.py for provider-specific setup wizards
- Comprehensive README rewrite with full config reference
- New optional skill: autonomous-ai-agents/honcho
- Expanded memory-providers.md with multi-profile docs
- 9 new tests (chunking, dialectic guard, peer lookups), 14 dead tests removed
- Fix 2 pre-existing TestResolveConfigPath filesystem isolation failures

tests/honcho_plugin/test_client.py

@@ -30,7 +30,6 @@ class TestHonchoClientConfigDefaults:
         assert config.session_strategy == "per-directory"
         assert config.recall_mode == "hybrid"
         assert config.session_peer_prefix is False
-        assert config.linked_hosts == []
         assert config.sessions == {}
 
 
@@ -106,7 +105,6 @@ class TestFromGlobalConfig:
                 "hermes": {
                     "workspace": "override-ws",
                     "aiPeer": "override-ai",
-                    "linkedHosts": ["cursor"],
                 }
             }
         }))
@@ -116,7 +114,6 @@ class TestFromGlobalConfig:
         # Host block workspace overrides root workspace
         assert config.workspace_id == "override-ws"
         assert config.ai_peer == "override-ai"
-        assert config.linked_hosts == ["cursor"]
         assert config.environment == "staging"
         assert config.peer_name == "alice"
         assert config.enabled is True
@@ -297,41 +294,6 @@ class TestResolveSessionName:
         assert result == "custom-session"
 
 
-class TestGetLinkedWorkspaces:
-    def test_resolves_linked_hosts(self):
-        config = HonchoClientConfig(
-            workspace_id="hermes-ws",
-            linked_hosts=["cursor", "windsurf"],
-            raw={
-                "hosts": {
-                    "cursor": {"workspace": "cursor-ws"},
-                    "windsurf": {"workspace": "windsurf-ws"},
-                }
-            },
-        )
-        workspaces = config.get_linked_workspaces()
-        assert "cursor-ws" in workspaces
-        assert "windsurf-ws" in workspaces
-
-    def test_excludes_own_workspace(self):
-        config = HonchoClientConfig(
-            workspace_id="hermes-ws",
-            linked_hosts=["other"],
-            raw={"hosts": {"other": {"workspace": "hermes-ws"}}},
-        )
-        workspaces = config.get_linked_workspaces()
-        assert workspaces == []
-
-    def test_uses_host_key_as_fallback(self):
-        config = HonchoClientConfig(
-            workspace_id="hermes-ws",
-            linked_hosts=["cursor"],
-            raw={"hosts": {"cursor": {}}},  # no workspace field
-        )
-        workspaces = config.get_linked_workspaces()
-        assert "cursor" in workspaces
-
-
 class TestResolveConfigPath:
     def test_prefers_hermes_home_when_exists(self, tmp_path):
         hermes_home = tmp_path / "hermes"
@@ -346,14 +308,22 @@ class TestResolveConfigPath:
     def test_falls_back_to_global_when_no_local(self, tmp_path):
         hermes_home = tmp_path / "hermes"
         hermes_home.mkdir()
-        # No honcho.json in HERMES_HOME
+        # No honcho.json in HERMES_HOME — also isolate ~/.hermes so
+        # the default-profile fallback doesn't hit the real filesystem.
+        fake_home = tmp_path / "fakehome"
+        fake_home.mkdir()
 
-        with patch.dict(os.environ, {"HERMES_HOME": str(hermes_home)}):
+        with patch.dict(os.environ, {"HERMES_HOME": str(hermes_home)}), \
+             patch.object(Path, "home", return_value=fake_home):
             result = resolve_config_path()
         assert result == GLOBAL_CONFIG_PATH
 
-    def test_falls_back_to_global_without_hermes_home_env(self):
-        with patch.dict(os.environ, {}, clear=False):
+    def test_falls_back_to_global_without_hermes_home_env(self, tmp_path):
+        fake_home = tmp_path / "fakehome"
+        fake_home.mkdir()
+
+        with patch.dict(os.environ, {}, clear=False), \
+             patch.object(Path, "home", return_value=fake_home):
             os.environ.pop("HERMES_HOME", None)
             result = resolve_config_path()
         assert result == GLOBAL_CONFIG_PATH