u/complete: strip markdown fences, insert at cursor, info to stderr

Also set tools:false on copilot agent and update core submodule
with the new tools config field.

agents/copilot.json

@@ -1,6 +1,6 @@
 {
   "prompt": [],
-  "trustedTools": [],
+  "tools": false,
   "hooks": {
     "turnError": [
       "$OLLIE/x/freeloader $OLLIE_SESSION_ID"

core

@@ -1 +1 @@
-Subproject commit 1b04d6a75b522ce01ad65aa73e4d21f36874bb26
+Subproject commit c069deccca6553e5df0a9680b35c947e42a45d26

scripts/u/complete

@@ -106,7 +106,7 @@ suffix="${suffix:0:$SUFFIX_MAX}"
 sid=$(find_or_create_session "$PWD")
 B="$MOUNT/s/$sid"
 
-printf '%s\n' "Complete the code at the cursor in ${filename}. Output ONLY the text to insert — no explanation, no markdown, no preamble.
+printf '%s\n' "Complete the code at the cursor in ${filename}. Output ONLY the raw text to insert at the cursor position. Do NOT wrap the output in markdown code fences or backticks. No explanation, no preamble.
 
 <prefix>
 ${prefix}
@@ -124,10 +124,13 @@ done
 # Read result from offset, then clear context for next completion
 offset=$(cat "$B/offset" 2>/dev/null || echo 0)
 result=$(tail -c +$((offset + 1)) "$B/chat" 2>/dev/null)
+# Strip markdown code fences if the model wrapped the output.
+result=$(printf '%s' "$result" | sed '/^```[a-zA-Z]*$/d; /^```$/d')
+# Print info lines (:: prefix) to stderr; keep only code.
+printf '%s\n' "$result" | grep '^:: ' >&2 || true
+result=$(printf '%s' "$result" | grep -v '^:: ')
 echo "clear" > "$B/ctl"
 
-# Write completion to a new acme window
-newid=$(9p read acme/new/ctl | awk 'NR==1{print $1}')
-printf 'name ollie/complete\n' | 9p write acme/$newid/ctl
-printf '%s' "$result" | 9p write acme/$newid/body
-printf 'clean\n' | 9p write acme/$newid/ctl
+# Insert completion at the cursor position (dot)
+echo "addr=dot" | 9p write acme/$winid/ctl
+printf '%s' "$result" | 9p write acme/$winid/data