feat: implement MACP phase 1 core protocol

bin/mosaic

@@ -15,6 +15,7 @@ set -euo pipefail
 #   mosaic init [args...]         Generate SOUL.md interactively
 #   mosaic doctor [args...]       Health audit
 #   mosaic sync [args...]         Sync skills
+#   mosaic macp [args...]         Manual MACP queue operations
 #   mosaic seq [subcommand]       sequential-thinking MCP management (check/fix/start)
 #   mosaic bootstrap <path>       Bootstrap a repo
 #   mosaic upgrade release         Upgrade installed Mosaic release
@@ -41,6 +42,7 @@ Management:
   init [args...]         Generate SOUL.md (agent identity contract)
   doctor [args...]       Audit runtime state and detect drift
   sync [args...]         Sync skills from canonical source
+  macp [args...]         Manual MACP queue operations
   seq [subcommand]       sequential-thinking MCP management:
                          check [--runtime <r>] [--strict]
                          fix [--runtime <r>]
@@ -487,6 +489,11 @@ run_sync() {
   exec "$MOSAIC_HOME/bin/mosaic-sync-skills" "$@"
 }
 
+run_macp() {
+  check_mosaic_home
+  exec "$MOSAIC_HOME/bin/mosaic-macp" "$@"
+}
+
 run_seq() {
   check_mosaic_home
   local checker="$MOSAIC_HOME/bin/mosaic-ensure-sequential-thinking"
@@ -774,6 +781,7 @@ case "$command" in
   init)       run_init "$@" ;;
   doctor)     run_doctor "$@" ;;
   sync)       run_sync "$@" ;;
+  macp)       run_macp "$@" ;;
   seq)        run_seq "$@" ;;
   bootstrap)  run_bootstrap "$@" ;;
   prdy)       run_prdy "$@" ;;