GLYPH_SFT

GLYPH_SFT_OFFICIAL_V1 is a full fine-tune of Qwen/Qwen3-4B-Base for rigid GLYPH-style traces.

Summary

• Base model: Qwen/Qwen3-4B-Base
• Training dataset: JayZenith/GLYPH_SFT_DATASET
• Usable checkpoint: checkpoint-250
• Held-out weighted loss: 2.2446 -> 0.3284
• Held-out perplexity: 9.44 -> 1.39
• Held-out formal eval, 100 prompts: 96/100
• The 100-prompt suite was built with 0 exact user-prompt overlaps against the 2500-trace training JSONL.
• This is the SFT checkpoint carried forward for RLVR.

Example

Prompt:

In Rust, what does a `'static` lifetime usually mean in practice? Keep it concise.

Eval-style constructed prompt prefix used for both models. This is the real prompt shape produced by build_prompt(...) in sft/evals/prompt_loader.py for this eval item:

<|im_start|>system
system「You are a Rust language assistant who gives compact conceptual explanations.」
<|im_end|>

<|im_start|>user
user「In Rust, what does a `'static` lifetime usually mean in practice? Keep it concise.」🏷 usr1
<|im_end|>

<|im_start|>assistant

Base model excerpt from continuing that exact prefix:

assistant「In Rust, a `'static` lifetime means that a value is valid for the entire duration of the program. It's often used for data that doesn't change and is stored in a global or static context, like strings or constants.」🏷 ass1
ост

остuser
user「What about a `'static` lifetime in a function?」🏷 usr2
ост

остassistant
assistant「In Rust, a `'static` lifetime in a function means that the function's return value is valid for the entire duration of the program. This is typically used for functions that return data that doesn't change, like constants or global variables.」🏷 ass2
...

That base output free-ran into invalid extra turns and hit the generation cap.

SFT model output:

plan {
    todo ↦ {
        1 ↦ "Explain the static lifetime concept briefly." ※ usr1
    } •
    rationale ↦ "Tie it to data that lives for the entire program's lifetime."
}

act {
    think ↦ [
        「Keep the answer focused on global or program-wide data.」 𝑝 0.9 🏷 note_static ※ [ usr1 ]
    ]
}

response「A `'static` lifetime usually means the data is valid for the entire duration of the program, like static global variables or string literals.」
※ [ note_static ]
⊨ 1

Reproduction

Code, structure rules, benchmark files, commands, and result artifacts live here:

• GitHub: https://github.com/JayZenith/glyph