Struct DecisionWriter 

pub struct DecisionWriter { /* private fields */ }

The deterministic middle ground between MemoryWriter (verbatim final answer — noisy) and MemorySynthesizer (LLM distillation — costs a model call): persist only the lines that start with a capture marker, "DECISION:" by default.

Zero model calls, zero cost, and predictable: a run that states no decision writes nothing at all, so the store accumulates only content an agent explicitly committed to. Pair it with a system prompt that asks for conclusions as DECISION: lines. Measured against an LLM-free co-occurrence extractor on technical run transcripts, marker capture was the only extraction that stayed noise-free.

Marker lines from every assistant turn of the run are collected (not just the final one — an agent may commit to something mid-run), deduped verbatim, and written as one entry tagged decision on TaskCompleted.

Implementations

impl DecisionWriter

pub fn new(memory: Arc<dyn Memory>) -> Self

pub fn with_markers( self, markers: impl IntoIterator<Item = impl Into<String>>, ) -> Self

Replace the line prefixes that trigger capture.

pub fn with_source(self, source: impl Into<String>) -> Self

Tag every persisted entry with the given source name.

pub fn with_tags( self, tags: impl IntoIterator<Item = impl Into<String>>, ) -> Self

Trait Implementations

impl Hook for DecisionWriter

fn name(&self) -> &str

fn matches(&self, ev: &Event<'_>) -> bool

fn fire(&self, ev: &Event<'_>, _w: &mut World) -> HookOutcome