Enum SeedOutcome 

pub enum SeedOutcome {
    Installed,
    NoSlot,
    Incompatible,
}

Outcome of OuterObjective::seed_inner_state.

Distinguishes two non-error outcomes that callers handle differently:

• SeedOutcome::Installed — the objective owns an inner-β slot and the provided β has been stored there. The next eval* will warm-start from this β.
• SeedOutcome::NoSlot — the objective has no inner-β slot at all. The provided β is silently discarded. This is the contract reply for objectives whose inner iterate is conceptually empty (e.g. line-search bridges, screening proxies, fixed-spec objectives).

Genuine seeding failures (wrong dimension when a slot exists, internal allocation faults, …) are reported via Err(EstimationError).

The two non-error variants exist because the two real callers want opposite behavior on the no-slot path:

• The outer cache warm-start path (OuterProblem::run) reads a (ρ, β) pair from disk; if the objective has no β slot it must log loudly (“β-bearing checkpoint silently degraded to ρ-only resume”) so cache provenance is auditable.
• The continuation walk (prime_outer_seed) forwards inner_beta_hint from the previous step; if the objective has no β slot the walk simply proceeds cold — no log, no error.

Encoding the distinction in the return type lets each caller branch on the variant without inspecting error message strings (the previous brittle approach, see git history for is_no_hook in continuation.rs).

Variants

Installed

The objective installed the provided β into its inner-β slot.

NoSlot

The objective has no inner-β slot; the β was discarded.

Incompatible

The objective owns an inner-β slot, but the provided β is structurally incompatible with this fit’s inner block layout (its length does not match the per-block coefficient widths). The β was discarded and the fit resumes ρ-only.

This is the load-time reply for a row-relaxed cross-fit seed (the cache_seed_key prefix channel): two folds of the same model share an ρ-dim, so the cached ρ transfers, but the realized basis rank — hence the inner β length — is row-population dependent and legitimately differs across folds (the LOSO p=37-vs-p=85 case). A length-mismatched seed β is therefore NOT an error: cross-length β transfer is delegated to the gauge-projected FitArtifact channel, which least-squares re-expresses the parent’s raw β into this fold’s reduced subspace. Reporting Incompatible here keeps the (correct) ρ seed and avoids a spurious full cold-start.

Trait Implementations

impl Clone for SeedOutcome

fn clone(&self) -> SeedOutcome

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SeedOutcome

impl Debug for SeedOutcome

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

Formats the value using the given formatter.

impl Eq for SeedOutcome

impl PartialEq for SeedOutcome

fn eq(&self, other: &SeedOutcome) -> 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 StructuralPartialEq for SeedOutcome