# Tutorial 03: Pastebin With Model Fallback And Telemetry

This tutorial uses the `tutorial-pastebin` template: a small Flask snippet-hosting service designed for deterministic NightShift orchestration tests.

It is intentionally simpler than the imageboard tutorial. There are no uploads, thumbnails, sessions, or moderation queues. The work is ordinary web-app behavior: snippet creation, viewing, listing, filtering, expiration handling, and simple HTML forms.

## What The Template Creates

Run this from a disposable parent directory:

```bash
nightshift init --template tutorial-pastebin --root nightshift-pastebin
cd nightshift-pastebin
```

For an isolated local integration run, use the integration sandbox command from the NightShift repository root:

```bash
python -m nightshift.cli integ-run --template tutorial-pastebin
cd integ_runs/<timestamp>/project
```

Activate the generated virtual environment.

PowerShell:

```powershell
..\.venv\Scripts\Activate.ps1
python -m pip install -e ..\..\..
```

Bash:

```bash
source ../.venv/bin/activate
python -m pip install -e ../../..
```

The template creates:

```text
nightshift.yaml
.nightshift/
  agents/
    planner.md
    implementer.md
    debugger.md
    reviewer.md
  tasks.md
src/
  pastebin_app/
templates/
tests/
pyproject.toml
README.md
```

The template includes a working baseline Flask app and deterministic pytest suite. NightShift tasks then extend or verify app behavior in small increments.

## Prerequisites

Install NightShift from this repository:

```bash
python -m pip install -e .
```

Install target dependencies:

```bash
python -m pip install -e . pytest flask
```

Install and start Ollama, then pull the fallback models you want available:

```bash
ollama pull qwen2.5-coder:14b
ollama pull carstenuhlig/omnicoder-9b
ollama pull deepseek-coder-v2:16b
ollama list
```

NightShift uses Ollama's local HTTP API, normally at `http://localhost:11434`.

## Model Fallback

The template's implementation stage uses this fallback order:

1. `qwen2.5-coder:14b`
2. `carstenuhlig/omnicoder-9b`
3. `deepseek-coder-v2:16b`

NightShift records which agent/model handled each stage in `telemetry-summary.md`.

## Task Plan

The template writes the full task list to `.nightshift/tasks.md`. A copy is included here as [tasks.md](tasks.md).

1. Snippet creation and viewing
2. Snippet listing and filtering
3. Expiration handling
4. HTML forms and templates

Run one task first:

```bash
python -m nightshift.cli validate
python -m nightshift.cli run --task TASK-001
```

Then inspect:

```text
.nightshift/runs/<run-id>/devlog.md
.nightshift/runs/<run-id>/telemetry-summary.md
.nightshift/runs/<run-id>/tasks/TASK-001/semantic-context.md
.nightshift/runs/<run-id>/tasks/TASK-001/telemetry-summary.md
.nightshift/runs/<run-id>/tasks/TASK-001/artifact-index.md
.nightshift/runs/<run-id>/tasks/TASK-001/test-output.txt
```

## Pipeline Reference

A copy of the template pipeline is included here as [nightshift.yaml](nightshift.yaml). The canonical runnable template lives under `nightshift/project_templates/tutorial-pastebin/`.