Borrowing it
Nothing to install: this file belongs to nick-pape/grackle. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/nick-pape/grackle/main/.claude/skills/demo-record/SKILL.mdgit clone --depth 1 https://github.com/nick-pape/grackleWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/nick-pape/grackle/demo-record)<a href="https://agentmods.dev/skills/nick-pape/grackle/demo-record"><img src="https://agentmods.dev/badge/skills/nick-pape/grackle/demo-record/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/nick-pape/grackle/demo-record"><img src="https://agentmods.dev/badge/skills/nick-pape/grackle/demo-record.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00033 | $0.01145 |
| Opus 5 | $0.00016 | $0.00573 |
| Sonnet 5 | $0.00007 | $0.00229 |
| Haiku 4.5 | $0.00003 | $0.00114 |
Grade A, and why
demo-record scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Launch Grackle Demo Recording
This skill sets up and launches the self-recording Grackle demo where a Claude Code agent inside Docker controls a browser with Playwright MCP, narrates with PocketTTS MCP, and records its own screen with ffmpeg.
Prerequisites
- Grackle server must be running (
node packages/server/dist/index.jsorgrackle serve) - Docker Desktop must be running
ANTHROPIC_API_KEYmust be set (or~/.claude/.credentials.jsonmounted)
Steps
1. Build all packages
rush build
2. Build Docker images
# Demo recorder image (Playwright + Xvfb + PulseAudio + ffmpeg + PocketTTS)
# No --secret needed: uses PocketTTS built-in voices (no HF_TOKEN required)
docker build -f docker/Dockerfile.demo-recorder -t grackle-demo-recorder .
# Dev environment image (standard PowerLine)
docker build -f docker/Dockerfile.powerline -t grackle-powerline .
3. Nuke database and restart server
The demo must start with a completely clean database — no leftover projects, tasks, or findings from previous runs. Stale data causes the demo agent to see pre-existing tasks instead of creating them fresh on camera.
# Kill the grackle server (it holds the DB lock)
# Windows (Git Bash): find PID with `wmic process where "name='node.exe'" get processid,commandline | grep server`
# then: taskkill /PID <SERVER_PID> /F
# Linux/Mac: kill $(pgrep -f "node.*server/dist/index.js")
# Delete the database
rm -f ~/.grackle/grackle.db ~/.grackle/grackle.db-wal ~/.grackle/grackle.db-shm
# Restart the server
node packages/server/dist/index.js --port=7434 --web-port=3000 &
Also stop and remove any existing containers:
docker stop grackle-demo-recorder grackle-dev grackle-dev2 2>/dev/null
docker rm grackle-demo-recorder grackle-dev grackle-dev2 2>/dev/null
4. Add and provision environments
Since the DB was nuked, environments must be re-added and provisioned:
# Demo recorder with the full AV stack
grackle env add demo-recorder --docker --image grackle-demo-recorder --runtime claude-code
# Dev environments with repo clone (the demo agent creates tasks on these live)
grackle env add dev --docker --image grackle-powerline --runtime claude-code --repo nick-pape/grackle
grackle env add dev2 --docker --image grackle-powerline --runtime claude-code --repo nick-pape/grackle
# Provision all three
grackle env provision demo-recorder
grackle env provision dev
grackle env provision dev2
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 134 lines · 33 tokens per session scan A 36ce6c40783f
demo-record is a skill published in the GitHub repository nick-pape/grackle (21 stars, last pushed 2mo ago), licensed MIT. It adds 33 tokens to every session and 1,145 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
configure-coddy
Change Coddy's own configuration when the user asks for it: edit settings, providers, models, logging, permissions, or find, install, update, and remove MCP servers and skills. Stages UCI-style commands and commits only after the user confirms saving. Load when the user explicitly asks to change a Coddy setting, or…
generate-rules
Scan the codebase and generate or refresh focused project rules under .coddy/rules/.
coddy_project_demo
Examples-only project-local slash skill (copied under /.coddy/skills by the e2e harnesses).
coddy_slash_demo
Examples-only slash skill (Coddy skillsfixture).
vercel-sandbox
Run chrome-use + Chrome inside Vercel Sandbox microVMs for browser automation from any Vercel-deployed app. Use when the user needs browser automation in a Vercel app (Next.js, SvelteKit, Nuxt, Remix, Astro, etc.), wants to run headless Chrome without binary size limits, needs persistent browser sessions across…
playwright-cli
Automates browser interactions for web testing, form filling, screenshots, and data extraction. Use when the user needs to navigate websites, interact with web pages, fill forms, take screenshots, test web applications, or extract information from web pages.