🐛 Fix MCP edit tool empty result bug (Issue #21)

FIXES:
- wrap get_function_tree result in MCP content format
- wrap smart_edit result in MCP content format
- Add compression hints to initialization

The edit tool was returning correct data in logs but Claude
saw empty results because the responses weren't wrapped in
the required MCP content format:
```json
{
  "content": [{
    "type": "text",
    "text": "..."
  }]
}
```

Also added smart compression hints:
- Server description now hints at using compress:true
- Suggests quantum mode for massive codebases
- Helps AI assistants save context automatically

Fixes #21

🤖 Generated with Claude Code
Co-Authored-By: Claude <[email protected]>

Author: 8bit-wraith

Cargo.toml

@@ -3,7 +3,7 @@ members = ["expert_prompt_engineer"]
 
 [package]
 name = "st"
-version = "5.0.0"
+version = "5.0.1"
 edition = "2021"
 authors = ["8bit-wraith", "Claude", "Omni", "8b-is Team"]
 description = "Smart Tree - An intelligent, AI-friendly directory visualization tool"

src/mcp/mod.rs

@@ -353,7 +353,7 @@ impl McpServer {
 
 // Handler implementations
 
-async fn handle_initialize(_params: Option<Value>, _ctx: Arc<McpContext>) -> Result<Value> {
+async fn handle_initialize(_params: Option<Value>, ctx: Arc<McpContext>) -> Result<Value> {
     Ok(json!({
         "protocolVersion": "2024-11-05",
         "capabilities": {
@@ -373,15 +373,18 @@ async fn handle_initialize(_params: Option<Value>, _ctx: Arc<McpContext>) -> Res
             "name": "smart-tree",
             "version": env!("CARGO_PKG_VERSION"),
             "vendor": "8b-is",
-            "description": "Smart Tree - AI-optimized directory visualization with quantum compression",
+            "description": "Smart Tree v5 - NOW WITH COMPRESSION HINTS! 🗜️ Use compress:true for 80% smaller outputs. For massive codebases, use mode:'quantum' for 100x compression!",
             "homepage": env!("CARGO_PKG_REPOSITORY"),
             "features": [
                 "quantum-compression",
                 "mcp-optimization",
                 "content-search",
                 "streaming",
-                "caching"
-            ]
+                "caching",
+                "emotional-mode",
+                "auto-compression-hints"
+            ],
+            "compression_hint": "💡 Always add compress:true to analyze tools for optimal context usage!"
         }
     }))
 }

src/mcp/smart_edit.rs

@@ -946,13 +946,21 @@ pub async fn handle_smart_edit(params: Option<Value>) -> Result<Value> {
     // Write back to file
     std::fs::write(file_path, &editor.content)?;
 
-    Ok(json!({
+    let result = json!({
         "file_path": file_path,
         "language": format!("{:?}", language),
         "edits_applied": results,
         "initial_structure": initial_structure,
         "final_structure": final_structure,
         "content_preview": editor.content.lines().take(20).collect::<Vec<_>>().join("\n"),
+    });
+    
+    // Wrap in MCP content format
+    Ok(json!({
+        "content": [{
+            "type": "text",
+            "text": serde_json::to_string_pretty(&result)?
+        }]
     }))
 }
 
@@ -970,7 +978,15 @@ pub async fn handle_get_function_tree(params: Option<Value>) -> Result<Value> {
     let language = SupportedLanguage::from_extension(extension).context("Unsupported language")?;
 
     let editor = SmartEditor::new(content, language)?;
-    editor.get_function_tree()
+    let function_tree = editor.get_function_tree()?;
+    
+    // Wrap in MCP content format
+    Ok(json!({
+        "content": [{
+            "type": "text",
+            "text": serde_json::to_string_pretty(&function_tree)?
+        }]
+    }))
 }
 
 /// Insert a single function using minimal tokens