From 48e1e69fde3342da5306af47c69efe76cae55765 Mon Sep 17 00:00:00 2001
From: Ian Gulliver <git@flamingcow.io>
Date: Wed, 4 Feb 2026 11:42:07 -0800
Subject: [PATCH] Add IsSelf flag to identify tendrils server node

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 mcp.go      | 22 ++++++++++++++++++++--
 tendrils.go |  3 +++
 types.go    |  1 +
 3 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/mcp.go b/mcp.go
index 7d13f7e..7351538 100644
--- a/mcp.go
+++ b/mcp.go
@@ -76,7 +76,11 @@ func (t *Tendrils) mcpListNodes(ctx context.Context, req mcp.CallToolRequest) (*
 			nodeType = "unknown"
 		}
 
-		sb.WriteString(fmt.Sprintf("• %s [%s]\n", name, nodeType))
+		if node.IsSelf {
+			sb.WriteString(fmt.Sprintf("• %s [%s] ← THIS SERVER\n", name, nodeType))
+		} else {
+			sb.WriteString(fmt.Sprintf("• %s [%s]\n", name, nodeType))
+		}
 
 		for _, iface := range node.Interfaces {
 			sb.WriteString(fmt.Sprintf("  - %s", iface.MAC))
@@ -150,6 +154,9 @@ func formatNodeDetails(node *Node, links []*Link) string {
 	if node.Type != "" {
 		sb.WriteString(fmt.Sprintf("Type: %s\n", node.Type))
 	}
+	if node.IsSelf {
+		sb.WriteString("This Server: YES (tendrils is running here)\n")
+	}
 	if node.Unreachable {
 		sb.WriteString("Status: UNREACHABLE\n")
 	}
@@ -297,7 +304,11 @@ func (t *Tendrils) mcpSearchNodes(ctx context.Context, req mcp.CallToolRequest)
 			nodeType = "unknown"
 		}
 
-		sb.WriteString(fmt.Sprintf("• %s [%s]\n", name, nodeType))
+		if node.IsSelf {
+			sb.WriteString(fmt.Sprintf("• %s [%s] ← THIS SERVER\n", name, nodeType))
+		} else {
+			sb.WriteString(fmt.Sprintf("• %s [%s]\n", name, nodeType))
+		}
 		for _, iface := range node.Interfaces {
 			sb.WriteString(fmt.Sprintf("  - %s", iface.MAC))
 			if len(iface.IPs) > 0 {
@@ -339,6 +350,7 @@ func (t *Tendrils) mcpGetTopology(ctx context.Context, req mcp.CallToolRequest)
 
 	typeCounts := map[string]int{}
 	var unreachable int
+	var selfNode *Node
 	for _, node := range nodes {
 		nodeType := string(node.Type)
 		if nodeType == "" {
@@ -348,11 +360,17 @@ func (t *Tendrils) mcpGetTopology(ctx context.Context, req mcp.CallToolRequest)
 		if node.Unreachable {
 			unreachable++
 		}
+		if node.IsSelf {
+			selfNode = node
+		}
 	}
 
 	var sb strings.Builder
 	sb.WriteString("Network Topology Summary\n")
 	sb.WriteString("========================\n\n")
+	if selfNode != nil {
+		sb.WriteString(fmt.Sprintf("This server: %s\n", selfNode.DisplayName()))
+	}
 	sb.WriteString(fmt.Sprintf("Total nodes: %d\n", len(nodes)))
 	sb.WriteString(fmt.Sprintf("Total links: %d\n", len(links)))
 	sb.WriteString(fmt.Sprintf("Active errors: %d\n", len(errors)))
diff --git a/tendrils.go b/tendrils.go
index c396cb2..d30bef6 100644
--- a/tendrils.go
+++ b/tendrils.go
@@ -200,6 +200,9 @@ func (t *Tendrils) populateLocalAddresses() {
 		t.nodes.Update(target, netIface.HardwareAddr, ips, netIface.Name, hostname, "local")
 		if target == nil {
 			target = t.nodes.GetByMAC(netIface.HardwareAddr)
+			if target != nil {
+				target.IsSelf = true
+			}
 		}
 	}
 }
diff --git a/types.go b/types.go
index ab9e48a..6a81c55 100644
--- a/types.go
+++ b/types.go
@@ -494,6 +494,7 @@ type Node struct {
 	Unreachable           bool                   `json:"unreachable,omitempty"`
 	Avoid                 bool                   `json:"avoid,omitempty"`
 	InConfig              bool                   `json:"in_config,omitempty"`
+	IsSelf                bool                   `json:"is_self,omitempty"`
 	errors                *ErrorTracker
 	pollTrigger           chan struct{}
 	cancelFunc            context.CancelFunc