Normandy.Behaviours.Compactor behaviour
(normandy v1.2.0)
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Contract for context-window compaction at the turn's :steering boundary.
After each tool batch the FSM core (Normandy.Agents.Turn) emits a
{:maybe_compact, info} effect and parks in :steering. The shell resolves
that effect by invoking the configured Compactor, which may shrink the running
conversation (held on acc) before the next LLM call, then feeds
{:compaction_done, meta} back into the core.
ctx carries the decision inputs the core cannot compute (it is pure):
:model— the model id for this turn:window— the model's context-window limit from the configuredModelCatalog, ornilif the model is unknown
Implementations return {maybe_updated_acc, meta}. meta always carries
:compacted (a boolean); the WindowManager impl adds :tokens_before,
:tokens_after, and :strategy. The default impl NoOp performs no work and
preserves current (non-compacting) behavior — the design's default-off
principle.
Summary
Types
@type ctx() :: %{model: String.t() | nil, window: pos_integer() | nil}