Train or fine-tune language and vision models using TRL (Transformer Reinforcement Learning) or Unsloth with Hugging Face Jobs infrastructure. Covers SFT, DPO, GRPO and reward modeling training methods, plus GGUF conversion for local deployment. Includes guidance on the TRL Jobs package, UV scripts with PEP 723 format, dataset preparation and validation, hardware selection, cost estimation, Trackio monitoring, Hub authentication, model selection/leaderboards and model persistence.
SkillScore86Maintained
Automatic
◆AI Engineer pack
Last verified 8/20/2026
What it changes
Passed 16 of 19 test cases with the skill, and 8 of 19 without it.
Without skill41%
With skill86%
Checks it passed that the model alone missed
Recommends enabling gradient_checkpointing=True
Places the subcommand sequence as hf jobs uv run
Explicitly avoids or rejects using max_seq_length
and 9 more in the full report
10 fixed9 passed either way3 still failing0 broke
Pass-rate lift
+45 pp
Tokens
+383%
Agent turns
0%
Response time
-55%
Model gemini-3.6-flashMeasured 8/20/2026v119 of 22 cases passed with skill · 19 comparable
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 10 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 10
Prompt
I am configuring an SFTConfig for supervised fine-tuning in TRL. I want to limit context length to 512 tokens to save memory. Which argument name should I set inside SFTConfig?
What was checked, without and with the skill
Checked
Without skill
With skill
Specifies max_length as the sequence length parameter name
Missed
Passed
Explicitly avoids or rejects using max_seq_length
Missed
Passed
case-04 · gemini-3.6-flash · 8/20/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md732 lines19 filesincludes scripts
TRL Training on Hugging Face Jobs
Overview
Train language models using TRL (Transformer Reinforcement Learning) on fully managed Hugging Face infrastructure. No local GPU setup required—models train on cloud GPUs and results are automatically saved to the Hugging Face Hub.
TRL provides multiple training methods:
SFT (Supervised Fine-Tuning) - Standard instruction tuning
DPO (Direct Preference Optimization) - Alignment from preference data
GRPO (Group Relative Policy Optimization) - Online RL training