Module overflow 

Compact overflow detection.

Determines when the conversation context is approaching or exceeding the model’s context window, triggering compaction before or after a provider turn.

Ported from OpenCode V1: packages/opencode/src/session/overflow.ts.

Constants

COMPACTION_BUFFER

Token headroom reserved between context limit and compaction trigger.

Functions

is_overflow

Returns true when the conversation history exceeds the usable context window.

usable_tokens

Computes the number of tokens available for conversation history.