feat(agent): opt-in tool-result context pruning

src/agents/pi-extensions/context-pruning.ts

@@ -0,0 +1,19 @@
+/**
+ * Opt-in context pruning (“microcompact”-style) for Pi sessions.
+ *
+ * This only affects the in-memory context for the current request; it does not rewrite session
+ * history persisted on disk.
+ */
+
+export { default } from "./context-pruning/extension.js";
+
+export { pruneContextMessages } from "./context-pruning/pruner.js";
+export type {
+  ContextPruningConfig,
+  ContextPruningToolMatch,
+  EffectiveContextPruningSettings,
+} from "./context-pruning/settings.js";
+export {
+  computeEffectiveSettings,
+  DEFAULT_CONTEXT_PRUNING_SETTINGS,
+} from "./context-pruning/settings.js";