test(mcp-augment): register test fixtures and update tests

- canonical_configs.json: add augment entry (stdio config with type field)
- host_registry.py: AUGMENT_FIELDS in FIELD_SETS, AugmentAdapter in get_adapter(),
  AUGMENT_FIELDS added to all_possible_fields union for filter test generation
- test_adapter_registry.py: add "augment" to expected default hosts set

Auto-generates 19+ new test cases: 1 host-config roundtrip, 19 cross-host
sync pairs (10x10 - 9x9), 1 transport mutual exclusion, ~28 field filtering.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: LittleCoinCoin

tests/test_data/mcp_adapters/canonical_configs.json

@@ -75,6 +75,14 @@
     "enabled_tools": ["tool1", "tool2"],
     "disabled_tools": ["tool3"]
   },
+  "augment": {
+    "command": "python",
+    "args": ["-m", "mcp_server"],
+    "env": {"API_KEY": "test_key"},
+    "url": null,
+    "headers": null,
+    "type": "stdio"
+  },
   "opencode": {
     "command": "npx",
     "args": ["-y", "@modelcontextprotocol/server-filesystem", "/tmp"],

tests/test_data/mcp_adapters/host_registry.py

@@ -19,6 +19,7 @@
 from pathlib import Path
 from typing import Any, Dict, FrozenSet, List, Optional, Set, Tuple
 
+from hatch.mcp_host_config.adapters.augment import AugmentAdapter
 from hatch.mcp_host_config.adapters.base import BaseAdapter
 from hatch.mcp_host_config.adapters.claude import ClaudeAdapter
 from hatch.mcp_host_config.adapters.codex import CodexAdapter
@@ -29,6 +30,7 @@
 from hatch.mcp_host_config.adapters.opencode import OpenCodeAdapter
 from hatch.mcp_host_config.adapters.vscode import VSCodeAdapter
 from hatch.mcp_host_config.fields import (
+    AUGMENT_FIELDS,
     CLAUDE_FIELDS,
     CODEX_FIELD_MAPPINGS,
     CODEX_FIELDS,
@@ -58,6 +60,7 @@
     "kiro": KIRO_FIELDS,
     "codex": CODEX_FIELDS,
     "opencode": OPENCODE_FIELDS,
+    "augment": AUGMENT_FIELDS,
 }
 
 # Reverse mappings for Codex (host-native name → universal name)
@@ -97,6 +100,7 @@ def get_adapter(self) -> BaseAdapter:
             "kiro": KiroAdapter,
             "codex": CodexAdapter,
             "opencode": OpenCodeAdapter,
+            "augment": AugmentAdapter,
         }
         factory = adapter_map[self.host_name]
         return factory()
@@ -355,6 +359,7 @@ def generate_unsupported_field_test_cases(
         | KIRO_FIELDS
         | CODEX_FIELDS
         | OPENCODE_FIELDS
+        | AUGMENT_FIELDS
     )
 
     cases: List[FilterTestCase] = []

tests/unit/mcp/test_adapter_registry.py

@@ -31,6 +31,7 @@ def setUp(self):
     def test_AR01_registry_has_all_default_hosts(self):
         """AR-01: Registry initializes with all default host adapters."""
         expected_hosts = {
+            "augment",
             "claude-desktop",
             "claude-code",
             "codex",