fix(group): address senior review feedback

- Add CROSS_REPO_IMPORT to RelationshipType so api.ts cast typechecks.
- Wire actual recursion into findConnections so groupGraph depth > 1
  traverses transitive cross-links instead of silently stopping at 1.
- Drop shadowing dynamic imports in groupStatus; use the module-level
  fsp/path already in scope.
- Switch import-scanner to fs.promises.readFile so file reads no longer
  block the event loop inside the async scanner.
- Extend group_discover MCP schema with repoPaths so the explicit-path
  mode is reachable via MCP (was CLI-only).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

gitnexus-shared/src/graph/types.ts

@@ -115,7 +115,8 @@ export type RelationshipType =
   | 'HANDLES_TOOL'
   | 'ENTRY_POINT_OF'
   | 'WRAPS'
-  | 'QUERIES';
+  | 'QUERIES'
+  | 'CROSS_REPO_IMPORT';
 
 export interface GraphNode {
   id: string;

gitnexus/src/core/group/extractors/import-scanner.ts

@@ -159,7 +159,7 @@ export async function scanRepoForImports(
 
     let content: string;
     try {
-      content = fs.readFileSync(abs, 'utf-8');
+      content = await fs.promises.readFile(abs, 'utf-8');
     } catch {
       continue;
     }

gitnexus/src/core/group/service.ts

@@ -638,6 +638,10 @@ export class GroupService {
           remoteRepo: remoteRepoGroupPath,
           remoteContext,
         });
+
+        // Recurse into the remote repo so depth > 1 actually traverses further.
+        // `visited` (closed over above) prevents cycles.
+        await findConnections(remoteRegistryName, currentDepth + 1);
       }
     };
 

gitnexus/src/mcp/tools.ts

@@ -576,18 +576,23 @@ WHEN TO USE: After group_sync, to explore how a symbol in one repo connects to s
   },
   {
     name: 'group_discover',
-    description: `Auto-discover indexed repos in a directory and create a group with code-level dependency detection.
+    description: `Auto-discover indexed repos in a directory (or from an explicit list) and create a group with code-level dependency detection.
 
-WHEN TO USE: When a user wants to see a combined knowledge graph from a parent directory containing multiple indexed repos. Scans for .gitnexus/ in subdirectories, reads package manifests, builds package mappings, creates a group, and optionally runs sync.`,
+WHEN TO USE: When a user wants to see a combined knowledge graph from multiple indexed repos. Reads package manifests, builds package mappings, creates a group, and optionally runs sync. Provide either \`directory\` (parent-dir scan) or \`repoPaths\` (explicit list).`,
     inputSchema: {
       type: 'object',
       properties: {
-        directory: { type: 'string', description: 'Parent directory containing repos' },
+        directory: { type: 'string', description: 'Parent directory containing repos (alternative to repoPaths)' },
+        repoPaths: {
+          type: 'array',
+          items: { type: 'string' },
+          description: 'Explicit list of repo paths (alternative to directory scan)',
+        },
         name: { type: 'string', description: 'Group name (default: workspace)' },
         force: { type: 'boolean', description: 'Overwrite existing group' },
         skipSync: { type: 'boolean', description: 'Skip running sync after creation' },
       },
-      required: ['directory'],
+      required: [],
     },
   },
 ];