From d12188b75f6baa2f7a7c031429d2a4343f9bb4c5 Mon Sep 17 00:00:00 2001
From: Jon Scalet <jon@telnyx.com>
Date: Fri, 24 Apr 2026 19:23:11 -0700
Subject: [PATCH] fix: guard slice access in agent log streaming

createAgent panics with 'index out of range [0] with length 0' when
the CreateAgent response returns an empty ServerRegions and the user
accepts the post-deploy 'view logs?' prompt. Fall back to the region
already resolved earlier in the function.

agentLogs has the same class of bug on AgentDeployments: Agents is
length-checked but AgentDeployments is not. Return a clean error
instead of panicking when an agent has no deployments.
---
 cmd/lk/agent.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/cmd/lk/agent.go b/cmd/lk/agent.go
index fe373a56..25ff3c12 100644
--- a/cmd/lk/agent.go
+++ b/cmd/lk/agent.go
@@ -665,7 +665,11 @@ func createAgent(ctx context.Context, cmd *cli.Command) error {
 			return err
 		} else if viewLogs {
 			fmt.Println("Tailing runtime logs...safe to exit at any time")
-			return agentsClient.StreamLogs(ctx, "deploy", lkConfig.Agent.ID, os.Stdout, resp.ServerRegions[0])
+			logRegion := region
+			if len(resp.ServerRegions) > 0 {
+				logRegion = resp.ServerRegions[0]
+			}
+			return agentsClient.StreamLogs(ctx, "deploy", lkConfig.Agent.ID, os.Stdout, logRegion)
 		}
 	}
 	return nil
@@ -1014,6 +1018,9 @@ func getLogs(ctx context.Context, cmd *cli.Command) error {
 	if len(response.Agents) == 0 {
 		return fmt.Errorf("no agent deployments found")
 	}
+	if len(response.Agents[0].AgentDeployments) == 0 {
+		return fmt.Errorf("agent has no deployments to stream logs from")
+	}
 
 	return agentsClient.StreamLogs(ctx, cmd.String("log-type"), agentID, os.Stdout, response.Agents[0].AgentDeployments[0].ServerRegion)
 }