paper-cranes: Skill for Claude Code

.claude/skills/show/SKILL.md

show is a skill for Claude Code from loqwai/paper-cranes. It costs 92 tokens per session (2,191 once invoked), scanned B, original, BSD-3-Clause.

A show-day launch checklist for a live browser-based music visualiser. It checks the local application, starts the chosen visual shader and controller, verifies audio and runtime, and can switch to a known-good fork during a failure.

In plain words
What is it for?
Use it to run the show, perform checks without launching, or switch to a working visual fork in an emergency.
Why use it?
It puts the preflight checks and launch steps in one repeatable process, reducing the chance of starting the show with a missing or unhealthy component.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: reads .claude/ paths.

This is loqwai/paper-cranes's own configuration. It tells Claude Code how to work on paper-cranes itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything paper-cranes configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is P=$(./scripts/dev-port); echo "port $P".

Reuse

Borrowing it

Nothing to install: this file belongs to loqwai/paper-cranes. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/loqwai/paper-cranes/main/.claude/skills/show/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/loqwai/paper-cranes

Made for: Claude Code.

Wrote 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.

agentmods badge for show

README.md
[![agentmods](https://agentmods.dev/badge/skills/loqwai/paper-cranes/show/github.svg)](https://agentmods.dev/skills/loqwai/paper-cranes/show)
Your own site
<a href="https://agentmods.dev/skills/loqwai/paper-cranes/show"><img src="https://agentmods.dev/badge/skills/loqwai/paper-cranes/show/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.

agentmods 80×15 button for show

Your own site · 80×15
<a href="https://agentmods.dev/skills/loqwai/paper-cranes/show"><img src="https://agentmods.dev/badge/skills/loqwai/paper-cranes/show.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 92 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,191 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00092 $0.02191
Opus 5.5 $0.00037 $0.00876
Sonnet 5.5 $0.00018 $0.00438
Haiku 4.5 $0.00009 $0.00219

Measured 2d ago against content hash ddf20ea785bc, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

show scanned grade B with 2 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 2d 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

tail -n 0 -F .claude/vj-signals.jsonl | grep -E --line-buffered '"type":"(clip|too-dark|shiver|boot)"|"type":"flicker","flicker":([2-9]|[1-9][0-9])'

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s -o /dev/null -w '%{http_code}\n' "http://localhost:$P/"
.claude/skills/show/SKILL.md · 150 lines

How it starts

The opening of the file, as written. The whole thing — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.

show: show-day launcher

This skill gets the wall up correctly and quickly. The runbook, knob map, story table, fork library and failure fixes live in docs/show-playbook.md. Read it once, and use it for anything this skill doesn't cover. Brief every agent you start with docs/vj-preferences.md.

Arguments

  • No args: the live line, shader=claude/wip/black-sun/sun-1 + controller=black-sun.
  • <shader-path>: for a fork, sun/N pairs with controller=sun-N, and sun/1 pairs with controller=sun. For any other shader, add &controller= only if a matching controllers/*.js exists.
  • audio=<label>: appends &audio_device=<label>. Without it, the page uses the OS default input, which should be BlackHole 2ch. Don't pass audio_device otherwise.
  • check: run step 1 only, then stop.
  • panic <fork>: run the Panic section only.

1. Preflight: run these, then print a ✅/❌ table

P=$(./scripts/dev-port); echo "port $P"
curl -s -o /dev/null -w '%{http_code}\n' "http://localhost:$P/"
lsof -a -p "$(lsof -nP -iTCP:$P -sTCP:LISTEN -t | head -1)" -d cwd -Fn | tail -1   # which checkout serves the wall
git branch --show-current; git fetch -q origin && git status -sb | head -1
grep -n "'\*\*/controllers/\*\*'" vite.config.js && grep -n "chokidar.watch('controllers'" vite-plugins/editor-sync-plugin.js
node scripts/vj/show.js displays
system_profiler SPAudioDataType | grep -i -A2 'BlackHole'
Check ✅ when
Dev server HTTP 200. If not, start npm run dev in a background Bash, then recheck.
Server checkout The cwd is the checkout you'll edit. Edits in any other checkout never reach the wall (2026-10-09: the server ran from the main checkout while edits went to peter-show).
Branch peter-show and not behind. If behind, ask before running git pull --ff-only.
No-reload controller fix (PR #144) Both greps hit: vite.config.js ignores **/controllers/**, and editor-sync-plugin.js runs its own chokidar.watch('controllers')
Projector displays lists more than the built-in panel. launch uses the last display, so confirm with the user if there's only one.
BlackHole present It appears in the audio device list. It's verified as the active input after launch in step 3.

Read the full file on GitHub · 150 lines

Changes

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.

  1. 2d ago Changed · +21 lines ddf20ea785bc
  2. 5d ago First seen · 129 lines · 92 tokens per session scan B 81fd0e8b085f

Subscribe to this mod's changes

show is a skill published in the GitHub repository loqwai/paper-cranes (7 stars, last pushed 3d ago), licensed BSD-3-Clause. It adds 92 tokens to every session and 2,191 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it B with 2 findings (reads agent configuration directories, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-08.

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