Enum PolicyStrategy 

pub enum PolicyStrategy {
    Summarize,
    SummarizeThenPrune,
    HeadAndTail,
    Window,
    ObservationMask,
    Custom,
}

User-facing strategy names. These map to engine CompactStrategys through [CompactionPolicyDeclaration::engine_strategy] so the policy surface can stay stable while the underlying engine evolves.

Variants

Summarize

LLM summarization of archived messages.

SummarizeThenPrune

LLM summarization, with a deterministic truncate fallback on error.

HeadAndTail

Keep the head and tail verbatim; compact only the middle. Maps to the engine truncate strategy with both keep_first and keep_last set.

Window

Rolling window: drop everything older than keep_last. Maps to the engine truncate strategy with keep_first = 0.

ObservationMask

Deterministic observation masking — keeps short results verbatim, masks long tool outputs. Cheapest, no LLM round-trip.

Custom

Caller-supplied closure decides the summary.

Implementations

impl PolicyStrategy

pub fn as_str(self) -> &'static str

pub fn parse(value: &str) -> Result<Self, String>

Translate a policy-level strategy name into the engine strategy that backs it. Accepts both the policy-level aliases (summarize, summarize-then-prune, …) and the raw engine names (llm, truncate, observation_mask, custom) so callers can mix vocabularies during the policy migration.

pub fn engine_strategy(self) -> CompactStrategy

The engine strategy used for the primary compaction run.

pub fn engine_fallback(self) -> Option<CompactStrategy>

Engine fallback used when the primary strategy fails. Currently only summarize-then-prune declares one — everything else returns None, deferring to the engine’s per-call decision.

Trait Implementations

impl Clone for PolicyStrategy

fn clone(&self) -> PolicyStrategy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PolicyStrategy

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for PolicyStrategy

fn eq(&self, other: &PolicyStrategy) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for PolicyStrategy

impl Eq for PolicyStrategy

impl StructuralPartialEq for PolicyStrategy