Meta-Harness v1b: Policy x Harness Co-Evolution
Collection
Co-evolution GRPO (verl, Qwen3.5): shared policy = grader/solver + harness-editor. IMO/paper-review/math. bf16 checkpoints + evolved scaffolds. • 20 items • Updated
How to use hyunseoki/mh-v1b-sa-9b-closed-think with Transformers:
# Use a pipeline as a high-level helper
from transformers import pipeline
pipe = pipeline("text-generation", model="hyunseoki/mh-v1b-sa-9b-closed-think")
messages = [
{"role": "user", "content": "Who are you?"},
]
pipe(messages) # Load model directly
from transformers import AutoTokenizer, AutoModelForCausalLM
tokenizer = AutoTokenizer.from_pretrained("hyunseoki/mh-v1b-sa-9b-closed-think")
model = AutoModelForCausalLM.from_pretrained("hyunseoki/mh-v1b-sa-9b-closed-think", device_map="auto")
messages = [
{"role": "user", "content": "Who are you?"},
]
inputs = tokenizer.apply_chat_template(
messages,
add_generation_prompt=True,
tokenize=True,
return_dict=True,
return_tensors="pt",
).to(model.device)
outputs = model.generate(**inputs, max_new_tokens=40)
print(tokenizer.decode(outputs[0][inputs["input_ids"].shape[-1]:]))How to use hyunseoki/mh-v1b-sa-9b-closed-think with vLLM:
# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "hyunseoki/mh-v1b-sa-9b-closed-think"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/chat/completions" \
-H "Content-Type: application/json" \
--data '{
"model": "hyunseoki/mh-v1b-sa-9b-closed-think",
"messages": [
{
"role": "user",
"content": "What is the capital of France?"
}
]
}'docker model run hf.co/hyunseoki/mh-v1b-sa-9b-closed-think
How to use hyunseoki/mh-v1b-sa-9b-closed-think with SGLang:
# Install SGLang from pip:
pip install sglang
# Start the SGLang server:
python3 -m sglang.launch_server \
--model-path "hyunseoki/mh-v1b-sa-9b-closed-think" \
--host 0.0.0.0 \
--port 30000
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:30000/v1/chat/completions" \
-H "Content-Type: application/json" \
--data '{
"model": "hyunseoki/mh-v1b-sa-9b-closed-think",
"messages": [
{
"role": "user",
"content": "What is the capital of France?"
}
]
}'docker run --gpus all \
--shm-size 32g \
-p 30000:30000 \
-v ~/.cache/huggingface:/root/.cache/huggingface \
--env "HF_TOKEN=<secret>" \
--ipc=host \
lmsysorg/sglang:latest \
python3 -m sglang.launch_server \
--model-path "hyunseoki/mh-v1b-sa-9b-closed-think" \
--host 0.0.0.0 \
--port 30000
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:30000/v1/chat/completions" \
-H "Content-Type: application/json" \
--data '{
"model": "hyunseoki/mh-v1b-sa-9b-closed-think",
"messages": [
{
"role": "user",
"content": "What is the capital of France?"
}
]
}'How to use hyunseoki/mh-v1b-sa-9b-closed-think with Docker Model Runner:
docker model run hf.co/hyunseoki/mh-v1b-sa-9b-closed-think
Part of the Meta-Harness v1b study — co-evolution GRPO (verl) where a shared-weight policy plays two roles: TA (grader / solver, single-turn) and Proposer (harness/scaffold editor via multi-turn SEARCH/REPLACE). Question: does co-evolving the policy and its evaluation harness help, and through which lever (policy vs scaffold)?
| Domain | Sentiment (sa) |
| Architecture | Qwen3_5ForCausalLM — 32 layers, hidden 4096 |
| Precision | bf16 (merged from FSDP via verl.model_merger) |
| Notes | Closed-loop co-evolution, thinking ON. |
from transformers import AutoModelForCausalLM, AutoTokenizer
tok = AutoTokenizer.from_pretrained("hyunseoki/mh-v1b-sa-9b-closed-think")
model = AutoModelForCausalLM.from_pretrained("hyunseoki/mh-v1b-sa-9b-closed-think", torch_dtype="bfloat16")