feat(mcp-augment): add enum value and constant

- Add MCPHostType.AUGMENT = "augment" enum member
- Add "augment" to EnvironmentPackageEntry.validate_host_names supported set
- Add AUGMENT_FIELDS = CLAUDE_FIELDS (command/args/env/url/headers/type)
- Add "augment" to TYPE_SUPPORTING_HOSTS (type discriminator is used)

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

Author: LittleCoinCoin

hatch/mcp_host_config/fields.py

@@ -34,6 +34,7 @@
         "claude-code",
         "vscode",
         "cursor",
+        "augment",
     }
 )
 
@@ -116,6 +117,10 @@
 )
 
 
+# Fields supported by Augment Code (auggie CLI + extensions); same as Claude fields
+# Config: ~/.augment/settings.json, key: mcpServers
+AUGMENT_FIELDS: FrozenSet[str] = CLAUDE_FIELDS
+
 # Fields supported by OpenCode (no type field; uses local/remote type derivation,
 # command array merge, environment rename, and oauth nesting)
 OPENCODE_FIELDS: FrozenSet[str] = UNIVERSAL_FIELDS | frozenset(

hatch/mcp_host_config/models.py

@@ -31,6 +31,7 @@ class MCPHostType(str, Enum):
     KIRO = "kiro"
     CODEX = "codex"
     OPENCODE = "opencode"
+    AUGMENT = "augment"
 
 
 class MCPServerConfig(BaseModel):
@@ -366,6 +367,7 @@ def validate_host_names(cls, v):
             "gemini",
             "kiro",
             "opencode",
+            "augment",
         }
         for host_name in v.keys():
             if host_name not in supported_hosts: