basic runner setup changed

BEdit/AGENTS.md

@@ -25,7 +25,7 @@ src/bedit/
 │   ├── port_types.py       # Port type definitions and compatibility
 │   ├── serializer.py       # JSON persistence
 │   ├── libraries.py        # Library file discovery and parsing
-│   └── simulation/         # Qt-free simulation service and compiler/runtime code
+│   └── simulation/         # Qt-free composition and OpenModelica interface code
 └── gui/                    # All Qt-dependent code
     ├── app.py              # QApplication startup and palette
     ├── main_window.py      # Top-level UI orchestration
@@ -105,16 +105,19 @@ Keep the root of `src/bedit` minimal. New UI modules should go into the relevant
 - File → Reload Simulation Code (`Ctrl+F5`) reloads modules under
   `bedit.core.simulation`, replaces the shared application/controller service,
   and preserves the previous instance attributes where possible.
-- Simulation compilation lives in `core/simulation/compiler.py`; the simulation
-  service only owns application state and delegates compilation. Ports with
+- Modelica composition lives in `core/simulation/composer.py`; the simulation
+  service only owns application state and delegates composition. Ports with
   `multipleConnections` are emitted as Modelica arrays. Their size is inferred
   per component instance from graph connections and exposed while compiling as
   `$portname_N$`; array connection endpoints receive stable one-based indices in
   graph connection order.
-- Blocking simulator integration belongs in `core/simulation/runner.py` and runs
-  on its daemon worker thread. Never perform OMPython startup or simulation work
-  directly on the Qt GUI thread; background failures must go to the application
-  log.
+- OpenModelica integration belongs in `core/simulation/openmodelica.py`. Its
+  persistent worker and OMC session start lazily on the first queued request.
+  Never perform OMPython work directly on the Qt GUI thread. Result and error
+  callbacks run on the worker thread and must use a Qt signal before touching UI.
+  One lazy temporary working directory is shared by all requests in the session.
+  Explicit application shutdown closes OMC and removes that directory plus the
+  current session's OMPython log and port files; `__del__` is only a fallback.
 - The optional OpenModelica executable is persisted as
   `simulation/openModelicaPath`. The GUI passes it into `Simulation`; core must
   not read `QSettings`. An empty path uses OMPython/PATH discovery, while an