> ## Documentation Index
> Fetch the complete documentation index at: https://www.agentworldprotocol.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Sim profile

> Requirements added for simulation and evaluation worlds.

Adds to Core:

* Lockstep time model with the `on_tick` policy, staging, initial observations, multi-tick advances, and declared tick authority — AWP-TIM-002..004, AWP-TIM-009..012
* Seeding, snapshot/restore, deterministic replay — AWP-REP-001..003
* Sim-time timestamps (`ts_sim_ns`, `tick`) in the frame extension block — AWP-CLK-003, AWP-DAT-007
* `world.reset`: the manifest MUST list at least one entry in `initial_states`, and `world.reset { initial_state }` MUST return the world to that named state (with `seed` when `capabilities.seed` is advertised) with the cross-session effects of AWP-PRM-006. `[AWP-SIM-001]`

Intended for: RL/eval harnesses, game-logic testbeds, digital twins in analysis mode. The planned [gymnasium-bridge](/adapters/gymnasium-bridge) targets this profile for environments that support snapshot/restore (picklable state); other environments can claim Core only.