In addition to prompt tuning, we now apply a pre-flight structural guard for 'tap first post' / 'tap first grid item' intents.
If the intent targets a grid item, we pre-filter the candidates to only include those matching 'row X, column Y', 'photos by', or 'reel by'.
This drastically narrows the Set-of-Mark candidates down to ONLY valid grid items, making it literally impossible for the VLM to hallucinate and click navigation elements like 'Search' or 'Home' when asked to tap a post.
Also updated E2E test to enforce strict post-click assertion, preventing lying tests.
Marc Mintel
44fae37cc7