schema_version: prior-calibration-policy/1
policy_id: jebs-r1-v2-prior-policy-2026-08-23

package:
  name: DPprior
  minimum_version: 2.0.0

quadrature:
  M_fit: 160
  M_verify: 320
  # Distribution summaries use a higher order because full marginal-K PMFs
  # are a stricter numerical contract than the calibration objective itself.
  M_summary: 160
  M_summary_verify: 320

dual:
  metric: wsb_tail
  threshold: 0.5
  trigger_above: 0.40
  soft_target: 0.25
  hard_bound: 0.25
  # Fixed before posterior simulation. Fine resolution is concentrated where
  # the high-risk-band exit normally occurs; lambda=0.7 has no privileged role.
  lambda_grid:
    - 0.01
    - 0.02
    - 0.03
    - 0.04
    - 0.05
    - 0.06
    - 0.07
    - 0.08
    - 0.09
    - 0.10
    - 0.11
    - 0.12
    - 0.13
    - 0.14
    - 0.15
    - 0.16
    - 0.17
    - 0.18
    - 0.19
    - 0.20
    - 0.25
    - 0.30
    - 0.40
    - 0.50
    - 0.60
    - 0.70
    - 0.80
    - 0.90
    - 1.00
  selection_rule:
    name: largest_verified_lambda_exiting_high_risk_band_v1
    description: >-
      If the verified K-only prior has P(W_SB > 0.5) above 0.40, choose the
      largest fixed-grid lambda whose verified fixed-scale soft fit has
      P(W_SB > 0.5) at most 0.40. Among grid points that exit the predeclared
      high-risk band, this places the greatest objective weight on K-target
      fidelity. If no eligible point
      exists, reject the soft calibration without fallback.
    tie_break: largest_lambda
    probability_tolerance: 1.0e-10

boundaries:
  gamma_cv_point_mass_threshold: 0.01
  reject_soft_classes:
    - solver_parameter_boundary
    - scientific_point_mass_limit
    - unclassified_boundary
  allow_hard_sensitivity_classes:
    - interior
    - hard_active_constraint
    - hard_active_constraint_point_mass_limit

verification:
  require_status:
    - converged
    - boundary
  require_usable: true
  require_verified: true
  require_finite_parameters: true
  reject_approximation: true
  tail_absolute_tolerance: 1.0e-8
  ssi_root_tolerance: 1.0e-10

ssi:
  target_1:
    threshold: 0.5
    probability: 0.25
  target_2:
    threshold: 0.9
    probability: 0.05