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---
base_model: Qwen/Qwen3-4B-Instruct-2507
library_name: mlx
tags:
- lora
- mlx
- trip-optimizer
- travel
- mutation
license: apache-2.0
---
# trip-optimizer-mutator
MLX LoRA adapter for **Qwen3-4B-Instruct-2507** that generates targeted, structured
itinerary mutations for [trip-optimizer](https://github.com/michaelpersonal/trip-optimizer).
## Task
Given a trip profile, current plan, optimization goal, and constraints, the model
outputs a scoped RFC 6902 JSON Patch proposal — one change at a time.
trip-optimizer applies the patch deterministically and validates the result.
Input task field: `mutate_plan`
Supported mutation types: `swap_activity`, `upgrade_meal`, `reorder_day`,
`simplify_day`, `time_adjust`, `clarify`
## Usage with mlx-lm
```bash
pip install mlx-lm
```
```python
from mlx_lm import load, generate
model, tokenizer = load(
"Qwen/Qwen3-4B-Instruct-2507",
adapter_path="esc511/trip-optimizer-mutator",
)
```
## Usage with trip-optimizer
```bash
# After installing trip-optimizer
trip-optimizer setup # pulls via Ollama
```
## Training details
- **Base model:** Qwen/Qwen3-4B-Instruct-2507
- **Method:** MLX LoRA (r=8, alpha=20, dropout=0)
- **Layers:** 32
- **Training iters:** 600
- **Max sequence length:** 8192
- **Hardware:** Apple M5 Max 128 GB
- **Checkpoint:** v2 (trip-mutator-4b-v0-mlx-r8-v2)
## Input / Output schema
Full schemas at:
- Input: [trip_mutator_input.schema.json](https://github.com/michaelpersonal/trip-optimizer/blob/main/finetuning/mutation/schemas/trip_mutator_input.schema.json)
- Output: [trip_mutator_output.schema.json](https://github.com/michaelpersonal/trip-optimizer/blob/main/finetuning/mutation/schemas/trip_mutator_output.schema.json)