> For the complete documentation index, see [llms.txt](https://docs.layerlens.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.layerlens.ai/2.-get-started/all-tutorials.md).

# All tutorials

Every Stratix tutorial — guided, end-to-end walkthroughs organized by workflow stage.

Tutorials are the guided learning path. Each one is end-to-end, sequenced, and produces something working. If you want the fastest possible first-touch instead, see [Run your first evaluation in 5 minutes](https://github.com/LayerLens/gitbook-full/blob/main/02-get-started/first-eval-5-minutes.md).

Tutorials are organized along the five stages of [the Stratix workflow](/1.-introduction/the-stratix-workflow.md): **Select**, **Build**, **Observe**, **Evaluate**, **Improve**.

## Select

Pick what you're evaluating — models, benchmarks, datasets. No standalone tutorial in this stage today; for guided model-selection flows, see the cookbook:

* [Pick a model for a task](https://github.com/LayerLens/gitbook-full/blob/main/05-select/cookbook/pick-a-model.md)
* [Compare prompts on a small test set](https://github.com/LayerLens/gitbook-full/blob/main/05-select/cookbook/compare-prompts.md)

## Build

Get Stratix wired into your code or CI.

| # | Tutorial                                                         | Time   | What you'll have at the end                                |
| - | ---------------------------------------------------------------- | ------ | ---------------------------------------------------------- |
| 3 | [CI/CD quality gates](/6.-build-wire-your-code/03-cicd-gates.md) | 30 min | A GitHub Actions workflow that blocks merges on regression |

## Observe

Capture and route traces so they can be scored.

No standalone tutorial in this stage today. For trace ingestion, start with:

* [Set up trace ingestion](https://github.com/LayerLens/gitbook-full/blob/main/06-build/guides/setup-trace-ingestion.md) (guide)
* [Backfill from existing logs](/7.-observe-see-whats-happening/backfill-from-logs.md) (recipe)
* [Schedule continuous trace evaluation](https://github.com/LayerLens/gitbook-full/blob/main/07-observe/guides/schedule-continuous.md) (guide)

## Evaluate

Score model runs and traces with judges and code graders.

| # | Tutorial                                                                                | Time   | What you'll have at the end                           |
| - | --------------------------------------------------------------------------------------- | ------ | ----------------------------------------------------- |
| 1 | [First evaluation in 10 minutes](/8.-evaluate-score-the-outputs/01-first-evaluation.md) | 10 min | A scored model vs. benchmark, in UI and SDK           |
| 2 | [First judge](/8.-evaluate-score-the-outputs/02-first-judge.md)                         | 20 min | An LLM judge scoring a subjective dimension           |
| 4 | [Score live traces](/8.-evaluate-score-the-outputs/04-score-traces.md)                  | 30 min | Continuous evaluation running over production traffic |

## Improve

Tune judges, cut costs, harden regression protection.

| # | Tutorial                                                                 | Time   | What you'll have at the end                         |
| - | ------------------------------------------------------------------------ | ------ | --------------------------------------------------- |
| 5 | [GEPA-optimize a judge](/9.-improve-tune-the-system/05-gepa-optimize.md) | 45 min | An LLM judge with measurably higher human agreement |

## Reading order

If you're new, take them in numeric order — each builds on what came before.

1. [First evaluation](/8.-evaluate-score-the-outputs/01-first-evaluation.md) — Evaluate
2. [First judge](/8.-evaluate-score-the-outputs/02-first-judge.md) — Evaluate
3. [CI/CD quality gates](/6.-build-wire-your-code/03-cicd-gates.md) — Build
4. [Score live traces](/8.-evaluate-score-the-outputs/04-score-traces.md) — Evaluate / Observe
5. [GEPA-optimize](/9.-improve-tune-the-system/05-gepa-optimize.md) — Improve

Total time investment for all five: \~2.5 hours.

## Where to next

* [Top 5 starter recipes](https://github.com/LayerLens/gitbook-full/blob/main/02-get-started/top-5-starter-recipes.md) — same week-one outcomes, recipe-shaped instead of tutorial-shaped
* [All cookbook recipes](/2.-get-started/all-cookbook-recipes.md) — 59 recipes by problem, framework, industry, integration
* [All guides](/2.-get-started/all-guides.md) — task-oriented walkthroughs
* [The Stratix workflow](/1.-introduction/the-stratix-workflow.md) — the spine these tutorials map to