{
  "pack_id": "arm_velo_offseason_v1",
  "pack_version": 1,
  "track": "arm_velo",
  "phase_type": "off_season",

  "structure": {
    "days_per_week": 3,
    "total_weeks": 12
  },

  "content_coverage": {
    "weeks_included_in_this_file": [1, 2],
    "note": "Weeks 3-12 are not yet included in pack_v1.json. Add them before enabling paid Off-Season unlock blocks beyond Week 2."
  },

  "body_prep": {
    "weeks": [1, 2],
    "mandatory_if": { "last_completed_phase_not_in": ["in_season"] },
    "optional_if": { "last_completed_phase_in": ["in_season"] },
    "opt_out_warning": "You’re entering the Off-Season from active competition. Most athletes benefit from a short body preparation phase to restore range, tissue capacity, and movement quality before increasing load."
  },

  "unlock_model": {
    "trial": {
      "weeks": [1, 2],
      "label": "2-week Body/Arm Prep"
    },
    "installments": [
      { "block_id": "wk1_4", "weeks": [1, 2, 3, 4], "entitlement": "evv.armvelo.offseason.wk1_4" },
      { "block_id": "wk5_8", "weeks": [5, 6, 7, 8], "entitlement": "evv.armvelo.offseason.wk5_8" },
      { "block_id": "wk9_12", "weeks": [9, 10, 11, 12], "entitlement": "evv.armvelo.offseason.wk9_12" }
    ],
    "pay_in_full_entitlement": "evv.armvelo.offseason.full"
  },

  "completion_prompts": {
    "body_prep_complete": "Your body is prepared. Now it’s time to build strength and speed.",
    "phase_complete": "You’ve built capacity and velocity. Now it’s time to prepare to compete."
  },

  "next_phase": {
    "recommended": {
      "phase_type": "pre_season",
      "block_length_weeks": 4
    }
  }
}