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REACTER is a protocol for modeling chemical reactions in classical molecular dynamics simulations.

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(2023):

Type labels have arrived! Type labels allow you to specify atom types with characters rather than arbitrary numbers. For example, atom type labels can correspond to those of a particular force field. This functionality eliminates the tedious step of making sure atom types, bond types, etc. are chosen consistently when reading in a data file and multiple molecule templates. In other words, input files are more universal.

(2022):
 
1) New keywords:
       - rate_limit: enforce a reaction rate for each reaction
       - rescale_charges: ensure the total charge of reaction site remains constant
 
2) Support for per-bond variables for custom constraint: 
       - For example, allows bond force to determine when reactions occur

(2021):

1) Advanced reaction constraints:
      - Root-mean-square deviation: geometrical constraint
      - Custom constraint: incorporate values from LAMMPS variables

2) Create new atoms bonded to existing atoms
      - New atoms positioned based on best-fit with reaction site

See the LAMMPS manual for details.
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