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docs: add BigFred implementation plans #1

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0591089
Add slot allocation unification plan.
keskad Jul 10, 2026
32d1ab6
Add remotes virtual loco pairing and momentary functions plans.
keskad Jul 11, 2026
b9aa9da
docs: document allocatePhysicalSlots and slot steal behaviour
keskad Jul 17, 2026
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6 changes: 4 additions & 2 deletions content/en/guides/admin/slots.md
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Original file line number Diff line number Diff line change
Expand Up @@ -40,8 +40,9 @@ state via `SlotObserver`.
| **`train.select`** | Holder per powered member | Acquire per member |

Rejected if **CanDrive** fails, **`max_loconet_slots`** is full
(`bigfred_slot_budget_exceeded`), or **`max_vehicles_per_user`** is exceeded
(`vehicle_cap_exceeded`).
(`bigfred_slot_budget_exceeded`), **`max_vehicles_per_user`** is exceeded
(`vehicle_cap_exceeded`), or — when **`allocate_physical_slots`** is on — the
loco is already IN_USE by another throttle (`slot_in_use`).

### When a slot is released (LocoNet)

Expand Down Expand Up @@ -109,6 +110,7 @@ only leaser caps and idle timeout matter.
| Setting | LocoNet | Z21 |
|---------|---------|-----|
| **`max_loconet_slots`** | Max IN_USE slots through BigFred (default 80) | Hidden / N/A |
| **`allocate_physical_slots`** | Exclusive PE 1.0 allocation like a physical FRED (default **on**). Off = legacy piggyback on a FRED-held slot | Hidden / N/A |
| **`idle_timeout_secs`** | Remote idle release (default 60 s; 0 = off) | Same |
| **`max_vehicles_per_user`** (layout) | Max driven vehicles per user (default 8) | Same |

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