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Model: h4bbo/FuseLLM-112M-Completion Source: Original Platform
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---
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library_name: transformers
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license: other # TODO: set the license you want to release this model under
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language:
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- code
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tags:
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- qwen3
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- causal-lm
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- code-completion
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- habbo
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- from-scratch
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---
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# FuseLLM-112M
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A small **112M-parameter decoder-only language model trained from scratch** (no base
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checkpoint, no LoRA) on a corpus of Habbo emulator / game-server source code. The
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goal is a tiny, fast model for **code completion** in that Java codebase, not a
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general-purpose or instruction-following model.
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## Model details
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|---|---|
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| Architecture | Qwen3 (decoder-only causal LM) |
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| Parameters | ~112M (tied input/output embeddings) |
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| Hidden size | 512 |
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| Layers | 8 (all full attention) |
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| Attention heads | 8 (8 KV heads) |
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| Vocab size | 151,936 |
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| Max context | 2048 |
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| Precision | float32 (safetensors) |
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| Training | From scratch, 4 epochs, 16,188 steps |
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| Final train loss | ~0.58 |
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`tie_word_embeddings: true` — the output `lm_head` shares the input embedding
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matrix, so checkpoints store only one copy. This is expected, not a missing weight.
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## Intended use
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- **Code completion** for Habbo-style Java server code (raw prompt → continuation).
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- Local experimentation / distillation base.
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## What it is NOT
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- **Not instruction-tuned / not a chat model.** It was trained only on raw source
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code, never on chat/instruction data.
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- The Qwen3 ChatML chat template is included (it ships with the tokenizer) for
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tokenizer/tool compatibility, but the model has **not** learned to follow chat
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turns. Passing chat-formatted prompts will produce poor, often repetitive output.
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Use it in **completion mode**, not conversation mode.
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## Usage
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### transformers (recommended for completion)
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```python
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from transformers import AutoModelForCausalLM, AutoTokenizer
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m = AutoModelForCausalLM.from_pretrained("h4bbo/FuseLLM-112M")
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tok = AutoTokenizer.from_pretrained("h4bbo/FuseLLM-112M")
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prompt = "public class Room {\n public void onEnter(Player p) {\n "
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ids = tok(prompt, return_tensors="pt").input_ids
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out = m.generate(ids, max_new_tokens=64, do_sample=False,
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repetition_penalty=1.1, pad_token_id=tok.eos_token_id)
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print(tok.decode(out[0][ids.shape[1]:], skip_special_tokens=True))
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```
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### llama.cpp (completion mode)
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No GGUF is shipped in this repo. The HF model is **verified** to convert and run in
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`llama.cpp`; generate the GGUF locally:
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```bash
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# 1) convert HF -> lossless fp16 GGUF
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python convert_hf_to_gguf.py h4bbo/FuseLLM-112M --outtype f16 \
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--model-name FuseLLM-112M --outfile FuseLLM-112M.fp16.gguf
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# (optional) 4-bit quantize
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llama-quantize FuseLLM-112M.fp16.gguf FuseLLM-112M.Q4_K_M.gguf Q4_K_M
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# 2) completion mode — pass the raw code seed, do NOT use chat/conversation mode.
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llama-cli -m FuseLLM-112M.Q4_K_M.gguf -cnv -st --no-jinja \
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-f seed.txt -n 64 --temp 0.0 --repeat-penalty 1.1 --no-display-prompt < /dev/null
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```
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`--no-jinja` keeps the prompt raw (the embedded chat template exists but the model
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isn't chat-tuned, so conversation mode is not meaningful for this model).
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## Files
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- `model.safetensors`, `config.json`, `generation_config.json` — HF model
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- `tokenizer.json`, `tokenizer_config.json`, `chat_template.jinja` — tokenizer + ChatML template
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## Notes
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- Small model + limited-domain corpus: expect repetition on long generations; use
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a repetition penalty and keep continuations short.
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- Trained from scratch, so this is fully independent of any upstream Qwen weights.
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The Qwen3 architecture/tokenizer are reused for compatibility.
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