You'll notice
Oversized hook context is now saved to a file instead of being cut off
What
Hooks can return extra context text (additionalContext) that gets added to what the model sees. When a single hook's context text is too large for its allotted space, Claude Code now writes the full text to disk and passes along a reference to that file plus a truncated preview, instead of simply cutting the text short and discarding the rest.
Why
Previously oversized context was hard-truncated and the rest lost. Saving it to disk means the full content isn't discarded, even though only a preview is shown inline.
Names in the bundleadditionalContext