Preventive harvest-wall contract — harvest_wall

Defines the fixed smooth objective contribution that keeps fitted and posterior states away from the biological harvest ceiling before the feasibility continuation is reached. The contribution is exactly strength for one year-season-age cell at ceiling and is summed over raw combined harvest rates. It does not alter catches, survival, or the separate feasibility continuation.

Usage

harvest_wall_contract(
  strength = 0,
  onset = 0.85,
  ceiling = biological_state_contract()$hrate_limit,
  scale = 0.01
)

Arguments

strength: Non-negative objective contribution for one cell at ceiling. Zero disables the wall for backward-compatible package data.
onset: Harvest rate around which the soft wall begins to rise.
ceiling: Biological harvest ceiling where the contribution equals strength.
scale: Positive softplus scale.

Value

A named list containing the versioned wall implementation and fixed scientific settings.