fs/spec.go: move GID("agent") to root node, let children inherit

- Removed 19 redundant GID("agent") calls from leaf nodes and subdirectories
- Root DirNode now sets GID once; all descendants inherit via fsedsl resolver

fs/spec.go

@@ -85,70 +85,61 @@ var (
 var treeSpecUID, treeSpecGID string
 
 var treeSpec = DirNode("/",
-	FileNode("backends", 0444,
-		Doc("Available backend names, one per line (ollama, openai, anthropic, etc.)"),
-		Read(readBackends),
 		GID("agent"),
-	),
+
+		FileNode("backends", 0444,
+			Doc("Available backend names, one per line (ollama, openai, anthropic, etc.)"),
+			Read(readBackends),
+		),
 
 	FileNode("help", 0444,
 		Doc("Filesystem reference (this output). Generated from spec."),
 		Read(readHelp),
-		GID("agent"),
 	),
 
 	FileNode("models", 0444,
 		Doc("Available models across all backends. Format: backend<tab>model per line."),
 		Read(readModels),
-		GID("agent"),
 	),
 
 	FileNode("agents", 0444,
 		Doc("Available agent profile names (from agents/*.json), one per line"),
 		Read(readAgents),
-		GID("agent"),
 	),
 
 	FileNode("tools", 0444,
 		Doc("Available tools and their descriptions. Format: name<spaces>description per line."),
 		Read(readTools),
-		GID("agent"),
 	),
 
 	FileNode("ctl", 0666,
 		Doc("Server control. Write: 'invalidate' (refresh caches), 'kill' (shutdown server)"),
 		Write(writeRootCtl),
-		GID("agent"),
 	),
 
 	FileNode("eventwait", 0444,
 		Doc("Blocking read for server events. Returns next event as 'topic payload'."),
 		Read(readEventwait),
 		BlockOnce(blockEventwait),
-		GID("agent"),
 	),
 
 	FileNode("complete", 0666,
 		Doc("Code completion. Write JSON {file,prefix,suffix,context} or plain prefix. Read returns completion."),
 		Request(requestComplete),
-		GID("agent"),
 	),
 
 FileNode("generate", 0666,
 			Doc("One-shot LLM generation. Write JSON {prompt,...} or plain text. Read returns result."),
 			Request(requestGenerate),
-			GID("agent"),
 		),
 
 		FileNode("aliases", 0444,
 			Doc("Alias table for ID-based lookups. Format: id<tab>path per line."),
 		Read(readAliases),
-		GID("agent"),
 	),
 
 	DirNode("elevate",
 		Doc("Elevation broker for sandboxed command approval"),
-		GID("agent"),
 
 		FileNode("policy", 0666,
 			Doc("Global elevation policy. Read: current policy. Write: key=value to update."),
@@ -166,7 +157,6 @@ FileNode("generate", 0666,
 
 	DirNode("session",
 		Doc("Session management. Contains per-session subdirectories."),
-		GID("agent"),
 
 		FileNode("new", 0666,
 			Doc("Create session. Write key=value args (name=, cwd=, agent=, backend=, model=). Read returns session name."),