feat(mcp): enhance MCP server registration with error handling and improve transport process management

refactor: update various tools for better error handling and path resolution
fix: improve markdown rendering and input display in TUI

apps/infrastructure/src/workflow/hive_mind/cycle.rs

@@ -56,25 +56,34 @@ pub async fn execute_cycle(
 
     let cycle_index = cycle.index;
 
+    use crate::workflow::hive_mind::types::NodeDirective;
+
     // Run all directives in this cycle concurrently.
     let handles: Vec<_> = cycle
         .directives
         .iter()
         .enumerate()
-        .map(|(i, directive)| {
-            let dir = directive.clone();
+        .map(|(i, node_dir): (usize, &NodeDirective)| {
+            let dir = node_dir.directive.clone();
+            let access_tier = node_dir.access_tier.clone();
             let ctx = SubagentContext::new(
                 dir.clone(),
                 tool_ctx.clone(),
-                "full".to_string(),
+                access_tier.clone(),
                 base_url.clone(),
                 api_key.clone(),
                 model.clone(),
             );
             let tc = tool_ctx.clone();
 
+            let access = match access_tier.as_str() {
+                "write" => AccessTier::Write,
+                "full" => AccessTier::Full,
+                _ => AccessTier::Read,
+            };
+
             async move {
-                let result = run_agent(ctx, &dir, AccessTier::Full, tc).await?;
+                let result = run_agent(ctx, &dir, access, tc).await?;
                 Ok::<NodeOutput, anyhow::Error>(NodeOutput {
                     id: format!("Node-{}-{}", cycle_index, i),
                     directive: dir,