# `Jido.Evolve.Mutation.AdaptiveText`
[🔗](https://github.com/agentjido/jido_evolve/blob/v1.0.0/lib/jido_evolve/mutation/adaptive_text.ex#L1)

Adaptive text mutation strategy that adjusts mutation rate based on fitness.

Uses high mutation rate early for exploration, then lowers it as fitness
improves for fine-tuning convergence.

# `mutate`

Apply adaptive mutation to a string entity.

## Options

- `:rate` - Base mutation rate (adjusted based on fitness context)
- `:strength` - Mutation strength (0.0 to 1.0), default: 0.5
- `:operations` - List of allowed operations (default: [:replace])
- `:high_rate` - High mutation rate for early exploration (default: 0.4)
- `:low_rate` - Low mutation rate for convergence (default: 0.08)
- `:fitness_threshold` - Switch to low rate when best fitness exceeds this (default: 0.8)
- `:best_fitness` - Current best fitness (from context, required for adaptation)

# `mutation_strength`

Calculate mutation strength based on generation number.

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*Consult [api-reference.md](api-reference.md) for complete listing*