postToolUse hook's additional_context not injected into agent model context

[Colin]

Hey @qazxxc!

Have a look over at this thread, which appaers to be the same issue.

Native postToolUse hooks accept and log additional_context successfully, but the injected context is not surfaced to the model

Where does the bug appear (feature/product)? Cursor IDE Describe the Bug A native postToolUse hook configured in .cursor/hooks.json runs successfully, returns valid JSON with an additional_context field, and Cursor’s Hooks log shows that output correctly. However, the model does not behave as if it received the injected context. I verified this with a minimal smoke-test hook that removes normal hook logic as a variable. The hook only fires for one dedicated test file path and returns a single …