From b1cbb9ca7cfbc6f01c42afab69a52b68c4930f4b Mon Sep 17 00:00:00 2001
From: Ollie Agent <ollie@example.com>
Date: Sat, 1 Aug 2026 20:35:02 +0200
Subject: [PATCH] session/fs: handle empty sessions during persistence

persistSession: check sess.Core.Agent() != nil before saving.
silently skip sessions with no agent instead of logging
'no active session' error on shutdown.

SaveSession: return nil (no-op) when there are no agents,
rather than returning an error that gets logged.
---
 fs/session/persist.go | 3 ++-
 session/session.go    | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/session/persist.go b/fs/session/persist.go
index 5c022e0..3c2d7ca 100644
--- a/fs/session/persist.go
+++ b/fs/session/persist.go
@@ -134,7 +134,8 @@ func persistSession(rs *rootState, id string) {
 	if !ok {
 		return
 	}
-	if sess.Core == nil {
+	if sess.Core == nil || sess.Core.Agent() == nil {
+		// Empty session — no agent to persist. Silently skip.
 		return
 	}
 	dir := activeSessionsDir(rs)
diff --git a/session/session.go b/session/session.go
index 72c239b..0a6a300 100644
--- a/session/session.go
+++ b/session/session.go
@@ -346,9 +346,10 @@ func (a *Session) flushSave() {
 }
 
 // SaveSession writes the current session state to the given path.
+// Returns nil if there is no agent (empty session).
 func (a *Session) SaveSession(path string) error {
 	if ag := a.Agent(); ag != nil {
 		return ag.SaveFull(path, a.id, a.CWD(), a.remote)
 	}
-	return fmt.Errorf("no agent in session")
+	return nil
 }