From 9c0d22960b7bf3b51e8198545a8ff817f14f306a Mon Sep 17 00:00:00 2001
From: Levi Neely <141506390+lneely@users.noreply.github.com>
Date: Sun, 17 May 2026 10:26:57 +0200
Subject: [PATCH] subagent_spawn: inject parent plan as context header

---
 tools/subagent_spawn | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/tools/subagent_spawn b/tools/subagent_spawn
index 090d64e..b0291e7 100755
--- a/tools/subagent_spawn
+++ b/tools/subagent_spawn
@@ -31,9 +31,18 @@ name=${name:-$(/bin/date +%s%N)-$$}
 [ -n "$OLLIE_SESSION_ID" ] && name="${OLLIE_SESSION_ID}__${name}"
 cwd=${cwd:-$(pwd)}
 
-# Prepend parent identity so the child always knows who spawned it.
+# Prepend parent identity and plan so the child always knows who spawned it.
+parent_plan=""
+if [ -n "$OLLIE_SESSION_ID" ]; then
+    plan_file="$OLLIE/s/$OLLIE_SESSION_ID/plan"
+    [ -s "$plan_file" ] && parent_plan=$(cat "$plan_file")
+fi
+
 prompt="[parent_session_id=${OLLIE_SESSION_ID}]
-[session_id=${name}]
+[session_id=${name}]${parent_plan:+
+[parent_plan_start]
+${parent_plan}
+[parent_plan_end]}
 $*"
 
 kv="name=${name}