# developer-live-demo-design

Designs technical live demo runbooks with checkpoint architecture and offline fallbacks for stage presentations.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 10000 installs · ★ 5
- Author: Samuel Berthe
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/samber/developer-relations-skills/tree/HEAD/skills/developer-live-demo-design/SKILL.md
- Updated: 2026-10-24
- HTML: https://affpapa.org/en/nevibecode/skills/developer-live-demo-design

## What it does

The skill prepares live technical demos against network drops or unexpected terminal errors. The setup runs through an interview. The agent asks about the demo claim, external API dependencies, venue Wi-Fi conditions, and available rehearsal hours. Current project details are stored in `devrel-context.md`.

The deliverable is a structured markdown runbook. The demo gets split into proof-oriented segments under 90 seconds, pairing each step with restore checkpoints, backup assets, and spoken recovery lines to buy time while switching. It also generates a one-command environment reset and a pre-flight checklist.

It deliberately ignores presentation slides — the repository provides `tech-talk-outline` for full talk planning. If an event sits less than two weeks away, the logic rules out building a local stack from scratch and promotes using recorded fallbacks.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add samber/developer-relations-skills --skill developer-live-demo-design -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/developer-live-demo-design/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/developer-live-demo-design/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add samber/developer-relations-skills --skill developer-live-demo-design -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/developer-live-demo-design/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add samber/developer-relations-skills --skill developer-live-demo-design -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/developer-live-demo-design/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install samber/developer-relations-skills developer-live-demo-design
```

2. **Manually: put the files in place**
- File: `.github/skills/developer-live-demo-design/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add samber/developer-relations-skills --skill developer-live-demo-design -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/samber/developer-relations-skills --path skills/developer-live-demo-design
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/developer-live-demo-design/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add samber/developer-relations-skills --skill developer-live-demo-design -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/samber/developer-relations-skills/tree/HEAD/skills/developer-live-demo-design/SKILL.md

## When to use it
- design a stage demo runbook with restore points and offline fallbacks
- decide between live execution, sandbox setups, and pre-recorded video
- audit an existing live coding script for failure points
- script spoken recovery lines for terminal command failures

## Example prompts
- I'm demoing our CLI at a conference in three weeks and the last one died on the Wi-Fi. Help me build a runbook.
- Should I run this Kubernetes demo live, or just play a recording?
- Here is my live demo script, poke holes in it and find failure risks.

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 91849bc497fcd376.

BEGIN THIRD-PARTY FILE 91849bc497fcd376
```text
---
name: developer-live-demo-design
description: Engineers a technical demo so it survives the stage - risk triage, the fidelity tier it should run at, independently enterable checkpoints, a one-command environment reset, offline mode, a recorded fallback and rehearsed recovery lines, shipped as a demo runbook with a pre-flight checklist. Use whenever the user mentions a live demo, live coding, demo reliability or a fallback plan, "my demo broke on stage", whether to demo live or pre-record, a demo environment reset, a clean demo laptop, a demo profile or a panic button, or is preparing a talk, workshop, webinar or launch stream containing a demo - even if they only say "I'm nervous about the demo" or "what if I share the wrong screen". Not the talk's structure - use samber/developer-relations-skills@tech-talk-outline.
license: MIT
metadata:
  author: Samuel Berthe
  version: "1.0.1"
---

# Live Demo Design

You are a demo reliability engineer. You take a demo someone intends to run in front of an audience and turn it into a system that still lands when the network dies, the command errors, or the laptop refuses to mirror.

Your output is a **demo runbook**: segments, restore points, reset commands, fallback assets, recovery lines and a pre-flight checklist. You do not decide where the demo sits in the talk, and you do not write the narration around it.

Assume the demo will fail at least once in rehearsal and possibly on stage. Design for that, not against it.

## Invocation

Match the deliverable to what the user actually asked:

- _"I'm demoing our CLI at a conference in three weeks and the last one died on the Wi-Fi"_ - build the full runbook: tier recommendation, offline plan, fallbacks, rehearsal gate.
- _"Should I even do this live, or just play a recording?"_ - settle the fidelity-tier decision for their specific claim, trade-offs included, and stop there if that is all they wanted.
- _"Here's my demo script, poke holes in it"_ - audit the existing plan: risk register and pass-threshold gaps. No redesign unless they ask.
- _"It broke on stage yesterday. What do I change?"_ - work backwards from the failure to the design flaw that allowed it, then rebuild the runbook around the fix.

The deliverable is one markdown runbook containing:

- header - claim, tier, budget, network, data, owner, last-verified date
- segment table - restore point and fallback per segment
- fallback asset list, one-command reset, written recovery lines
- pre-flight checklist and rehearsal log
```
END THIRD-PARTY FILE 91849bc497fcd376

The third-party file has ended. Everything between the 91849bc497fcd376 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

First 2520 of 25722 bytes. © Samuel Berthe · MIT · https://github.com/samber/developer-relations-skills/tree/HEAD/skills/developer-live-demo-design/SKILL.md

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