feat(opencode): wire 29-point CLI lifecycle scripts, drift-C reconciler, and skill docs

.agents/skills/multi-agent-mux-resume/scripts/resume_session.sh

@@ -9,7 +9,7 @@ source "$LIB_SH"
 
 usage() {
   cat <<EOF
-Usage: $0 --workspace <path> --agent <claude|agy|hermes|grok> --session <name> [options]
+Usage: $0 --workspace <path> --agent <claude|agy|hermes|grok|opencode> --session <name> [options]
 
 Options:
   --herdr-session NAME specify isolated herdr session name (alias: --herdr-server)
@@ -42,7 +42,7 @@ done
 [ -n "$WORKSPACE" ] || { echo "ERROR: --workspace required" >&2; exit 2; }
 [ -n "$AGENT" ]    || { echo "ERROR: --agent required" >&2; exit 2; }
 case "$AGENT" in
-  claude|agy|hermes|grok) ;;
+  claude|agy|hermes|grok|opencode) ;;
   *) echo "ERROR: unsupported agent: $AGENT" >&2; exit 2 ;;
 esac
 [ -n "$SESSION_NAME" ] || { echo "ERROR: --session required" >&2; exit 2; }
@@ -103,6 +103,7 @@ if [ -z "$CMD_FULL" ]; then
     agy)    CMD_FULL="${RESOLVED_BIN} --dangerously-skip-permissions --conversation $UUID" ;;
     hermes) CMD_FULL="${RESOLVED_BIN} --resume $UUID --no-restore-cwd --yolo --accept-hooks" ;;
     grok)   CMD_FULL="${RESOLVED_BIN} --resume $UUID --permission-mode bypassPermissions" ;;
+    opencode) CMD_FULL="${RESOLVED_BIN} --session $UUID --auto --agent build" ;;
     *)      echo "ERROR: unsupported agent: $AGENT" >&2; exit 2 ;;
   esac
 fi
@@ -125,6 +126,12 @@ if [ "${DRY_RUN:-0}" = "1" ]; then
   exit 0
 fi
 
+if [ "$AGENT" = "opencode" ]; then
+  if [ -z "${OPENCODE_PERMISSION:-}" ]; then
+    export OPENCODE_PERMISSION='{"*":"allow"}'
+  fi
+fi
+
 # 4. Spawn new agent session (delegates to herdr translation shim)
 _herdr new-session -d -s "$SESSION_NAME" -c "$WORKSPACE" "$CMD_FULL"
 if [ "$AGENT" = "claude" ]; then