Skill AI & LLM →

LLM Fine-Tuning Pipeline

spesifik LLM uretmek icin uctan uca fine-tuning playbook OpenAI hosted FT (GPT-4o-mini/4.1)…

An end-to-end playbook for producing a customer-specific LLM that holds a consistent brand voice, combining OpenAI hosted fine-tuning with self-hosted Qwen3 LoRA adapters. It walks dataset curation, PII masking, train/eval splitting, a three-metric evaluation suite, and serving with a fallback chain, so a fine-tune is measured and reversible rather than a leap of faith.

$15 one-time
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Prices include 20% VAT. · Forged on real agency work · one-time, no lock-in

  • Type Skill
  • Category AI & LLM
  • Delivery Email · instant
  • License One-time
Run preview
forgehouse, fine-tuning-pipeline-llm

Inside the run · no black box

See the actual work before you buy it.

Fine-tuning has to beat the base model by a set margin or the project stops. Fifty excellent examples outrank five hundred mediocre ones, three metrics gate the result, and a fallback chain catches failures in production.

  1. Measures the base model baseline first with a lexical overlap score plus an independent judge model scoring brand voice; fine-tuning must beat that baseline by a set margin or the project stops here
  2. Curates 50-200 training examples favoring quality over volume (50 excellent beat 500 mediocre), and masks personal data such as ID numbers, emails and phone numbers with regex before anything is uploaded
  3. Splits 80/20 into train and hold-out eval, deliberately seeding the eval set with edge cases and adversarial prompts the model must refuse, then keeps the two files strictly separate
  4. Trains a low-rank adapter on the self-hosted model (about 1% of parameters, roughly 30 minutes on a single GPU) or submits a hosted fine-tune job, whichever the monthly cost math favors
  5. Gates the result on three metrics at once: lexical overlap above 0.7, brand-voice judge above 4 of 5, adversarial pass rate above 95%; on regression it early-stops and rolls back to the last good checkpoint
  6. Deploys behind a fallback chain where a failed or timed-out tuned model silently routes to the base model with few-shot prompting, then monitors monthly and retrains as new approved examples accumulate
Use cases · what happens when you plug it in

One power source. 6 lines out.

fine-tuning-pipeline-llm · core

core active · 6 lines

  1. Converting curated examples into clean JSONL chat-format training data

    ✓ converting curated examp…
  2. Masking PII (ID numbers, email, phone) in training data for privacy compliance

    ✓ masking pii (id numbers
  3. Training a Qwen3-7B LoRA adapter with PEFT instead of an expensive full fine-tune

    ✓ training a qwen3-7b lora
  4. Launching an OpenAI hosted fine-tuning job and polling it to completion

    ✓ launching an openai hosted
  5. Evaluating a fine-tuned model with ROUGE-L, an LLM-as-judge rubric and adversarial checks

    ✓ evaluating a fine-tuned
  6. Serving fine-tuned models with vLLM adapter swap and a few-shot fallback chain

    ✓ serving fine-tuned models
Benefits · what you walk away with

Yours to keep.

Drag time forward. Watch what stays.

Forever

That's what owning means.

The rented stack

ai writing tool: subscription

expired · access lost

analytics suite: subscription

expired · access lost

design platform: subscription

expired · access lost

(nothing left)

Your forge

  1. Lock in a consistent brand voice that a model preserves across every generated report

    license: perpetual
  2. Cut inference cost and prompt size by moving few-shot examples into a trained adapter

    license: perpetual
  3. Catch overfitting and regressions before deploy via held-out eval and three metrics

    license: perpetual
  4. Keep service reliable with a fallback to a base model and few-shot when the fine-tune fails

    license: perpetual

subscriptions expire · deeds don't

What's included · the full manifest

Everything in the box.

Pick a piece up. Watch it work.

Dataset curation script that converts source examples to JSONL with PII masking regexes

part 01 of 06 · in the box

6 parts · one working system · ships instantly by email

Who it's for

This wasn't forged for everyone.

  • Not for you if you'd rather rent a tool than own one.
  • Not for you if you want someone else to run your stack.
  • Not for you if you're happy guessing.
Still here? Good.

ML and platform engineers who need a measured, cost-aware way to produce brand-consistent custom models instead of fine-tuning on faith.

then this was forged for you.

Works with

Universal by design: these run in any AI. Delivered in the open Agent Skills + MCP format (native in Claude); ChatGPT, Gemini, Cursor and Copilot adapt the same files their own way.

  • Claude Native format
  • ChatGPT Adapts via open standards
  • Gemini Adapts via open standards
  • Cursor Adapts via open standards
  • Copilot Adapts via open standards
Questions · still in the air

Catch what's on your mind.

the air is clear. nothing between you and the forge.
catch a spark: the forge will answer

  1. Do I need my own GPUs, or can I avoid self-hosting entirely?

    Both paths are covered, so you can use OpenAI hosted fine-tuning with no GPUs, or run a self-hosted Qwen3 LoRA adapter when you want control and lower per-call cost. You choose based on budget and how much you need to own the model.

  2. Can't I just use prompting or RAG instead of fine-tuning?

    Often you can, and the playbook is measured rather than fine-tune-first, with an evaluation suite to prove it earns its keep. Fine-tuning is for when prompting plateaus on consistent voice, not a reflex.

  3. Will fine-tuning teach the model new facts about my business?

    No, this targets voice and style consistency, not knowledge. For facts and current data you want retrieval (see embedding-strategies), because fine-tuning bakes in tone, not a source of truth.

  4. How is it delivered?

    By email right after purchase: ready to run, downloaded instantly, no setup wait.

  5. One-time or subscription?

    A one-time purchase; no subscription or hidden fees. VAT (20%) is included.

  6. Can I get a refund?

    As a digital product, it can’t be refunded once downloaded. That’s why we show exactly what’s inside and who it’s for, right here.