document render artifact salvage

agent_builder/builder.py

@@ -82,7 +82,9 @@ For render/media agents, subprocesses must be bounded with timeouts and broad
 exception handling, and failures must return structured JSON instead of
 crashing the worker. Use ``render: bool = False`` by default and expose every
 public skill argument with concrete type hints so the live ``input_schema``
-contains the full call surface.
+contains the full call surface. If a render command returns nonzero after
+emitting a usable file, persist or wrap that artifact and include the command
+failure as a warning instead of dropping the result.
 
 For Manim presentation agents specifically, generate a stable PDF fallback
 that does not require Manim rendering. If HTML/video rendering is requested,