feat(planner): add execution context to prompts

tests/test_ai_planner_task_runner.py

@@ -46,9 +46,11 @@ class NarrowSignaturePlanner(Planner):
 class ScreenshotRecordingPlanner(Planner):
     def __init__(self) -> None:
         self.screenshots: list[bytes | None] = []
+        self.device_platforms: list[str | None] = []
 
     def plan(self, *, goal, scene, context, screenshot=None):
         self.screenshots.append(screenshot)
+        self.device_platforms.append(context.device_platform)
         if context.step_results:
             return []
         return [PlannedStep(action="tap", description="tap")]
@@ -69,7 +71,9 @@ def _scene() -> Scene:
     )
 
 
-def _runner(*, planner=None, planner_config=None, observer=None) -> TaskRunner:
+def _runner(
+    *, planner=None, planner_config=None, observer=None, device_platform_provider=None
+) -> TaskRunner:
     return TaskRunner(
         planner=planner,
         planner_config=planner_config,
@@ -80,6 +84,7 @@ def _runner(*, planner=None, planner_config=None, observer=None) -> TaskRunner:
         config=TaskRunnerConfig(max_steps=5),
         observer=observer or (lambda device_id: _scene()),
         screenshot_provider=lambda device_id: PNG_10X20,
+        device_platform_provider=device_platform_provider,
     )
 
 
@@ -126,6 +131,19 @@ def test_task_runner_passes_screenshot_to_planner_that_declares_it() -> None:
     assert planner.screenshots == [PNG_10X20, PNG_10X20]
 
 
+def test_task_runner_passes_configured_device_platform_to_planner_context() -> None:
+    planner = ScreenshotRecordingPlanner()
+    runner = _runner(
+        planner=planner,
+        device_platform_provider=lambda device_id: "ios",
+    )
+
+    result = runner.run(Task(goal="inspect", device_id="phone"))
+
+    assert result.status == "completed"
+    assert planner.device_platforms == ["ios", "ios"]
+
+
 def test_task_runner_default_planner_is_stub_when_ai_planner_disabled() -> None:
     runner = _runner(planner=None, planner_config=PlannerConfig(enabled=False))