The agent keeps more context by default on long builds

On long builds the agent periodically compacts older conversation history to stay fast. Until now it compacted early enough that big tasks - many files, long sessions - could lose track of files it had just read and re-read them.

• The default Context level is now High (was Medium). On models with large

context windows the agent keeps roughly 2.5x more of the conversation before compacting, so long builds stay coherent instead of looping over the same files.

• No extra confirmation for the default. The one-tap cost acknowledgment

now appears only when you raise Context above High (Extra High or Max).

• Your explicit choice is untouched. If you set Medium (or any level)

yourself, that choice stays exactly as you set it.

You can still change Context per chat in the build-quality dialog, or set your own default in Settings → You → AI defaults.