Type Alias: WindowRefusalReason

WindowRefusalReason = "system-envelope" | "unresolved-tool-call" | "paused-tool" | "pending-check-in" | "inside-keep-window" | "only-existing-summary" | "summarizer-failed" | "replacement-not-smaller"

Defined in: src/core/agent/window/types.ts:43

Why a turn refused to leave the window. Every one of these is NAMED in the commit — a removal that took less than it could have has to say why, or the next person debugging an oversized window has to guess.

The set is closed and shared: the same reason means the same thing under every strategy, because every strategy resolves it through the same function (refusalFor, bound into WindowStrategyInput.planRemoval).