Enum RolloutPolicy 

pub enum RolloutPolicy {
    Off,
    Shadow,
    Enabled,
}

Rollout policy for the Asupersync migration (bd-2crbt).

Controls how the runtime lane transition is managed:

• Off — use only the configured lane, no shadow comparison.
• Shadow — run both baseline and candidate lanes, compare outputs, but use only the baseline lane for actual rendering. Evidence is emitted to the configured JSONL sink for operator review.
• Enabled — use the candidate lane for rendering (requires prior shadow evidence showing deterministic match).

The policy is logged at startup and can be overridden via the FTUI_ROLLOUT_POLICY environment variable (off, shadow, enabled).

Variants

Off

No rollout activity — use the configured lane directly.

Shadow

Shadow-run comparison mode: run both lanes, emit evidence, use baseline.

Enabled

Candidate lane is live — requires prior shadow evidence.

Implementations

impl RolloutPolicy

pub fn from_env() -> Option<Self>

Read the policy from the FTUI_ROLLOUT_POLICY environment variable.

Accepted values (case-insensitive): off, shadow, enabled. Returns None if unset or unrecognized.

pub fn parse(s: &str) -> Option<Self>

Parse a rollout policy name (case-insensitive).

Returns None for unrecognized values.

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

Returns a human-readable label for logging.

pub fn is_shadow(self) -> bool

Whether this policy involves shadow comparison.

Trait Implementations

impl Clone for RolloutPolicy

fn clone(&self) -> RolloutPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RolloutPolicy

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

Formats the value using the given formatter.

impl Default for RolloutPolicy

fn default() -> RolloutPolicy

Returns the “default value” for a type.

impl Display for RolloutPolicy

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

Formats the value using the given formatter.

impl Hash for RolloutPolicy

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for RolloutPolicy

fn eq(&self, other: &RolloutPolicy) -> 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 RolloutPolicy

impl Eq for RolloutPolicy

impl StructuralPartialEq for RolloutPolicy