Struct ContextBackoff 

pub struct ContextBackoff { /* private fields */ }

Per-fingerprint exponential backoff for context mutations whose post-apply measurement falsified them (kernel review S5, applied to Context).

The unattended cadence re-diagnoses from live signals every tick. A falsified mutation restores the knob it moved, so the next tick sees the same signals, mints the same fingerprint, matches the same standing approval, and applies-measures-reverts again — forever, each round paying for a full compaction pass under the engine lock. This is that loop’s brake. It is deliberately keyed on the fingerprint (the change), not the component: a different proposal for the same pillar is not the thing that failed.

Only the unattended path uses it. evolution.run on a session is a person asking for the check to run now, and there is no reason to answer that with “in backoff” (see run_context_evolution’s backoff argument).

Implementations

impl ContextBackoff

pub fn is_due(&self, fingerprint: &str, tick: u64) -> bool

True when fingerprint has never been falsified, or its backoff window has elapsed.

pub fn note_falsified(&mut self, fingerprint: &str, tick: u64)

Record a falsified apply at tick: the next attempt is allowed 2^attempts ticks later, exponent capped at [BACKOFF_MAX_EXPONENT].

pub fn clear(&mut self, fingerprint: &str)

Drop backoff state for a mutation that has now measurably paid — a later relapse starts fresh rather than inheriting an old window.

Trait Implementations

impl Debug for ContextBackoff

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

Formats the value using the given formatter.

impl Default for ContextBackoff

fn default() -> Self

Returns the “default value” for a type.