witness_seed/fortran/witness_seed_3.0_quickstart.md

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# Witness Seed 3.0 Quickstart
## Prerequisites
- Fortran compiler (e.g., gfortran, mpif90)
- MPI library (e.g., OpenMPI)
- Optional: NetCDF for climate data output
## Setup
1. Clone the repository: `git clone <repo-url>`
2. Navigate to `fortran/witness_seed_3.0`
3. Run `make` to compile: `make`
## Run
Execute the model: `mpirun -np 4 ./witness_seed_3.0`
## Output
Predictions are printed every 1000 steps. Future versions will write to `data/` in NetCDF format.
## Test
Run unit tests: `make test`
See [README.md](README.md) for the full vision.