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.
curl -O https://raw.githubusercontent.com/loqwai/paper-cranes/main/.claude/skills/jam/SKILL.mdgit clone --depth 1 https://github.com/loqwai/paper-cranesWrote 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/loqwai/paper-cranes/jam)<a href="https://agentmods.dev/skills/loqwai/paper-cranes/jam"><img src="https://agentmods.dev/badge/skills/loqwai/paper-cranes/jam/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/loqwai/paper-cranes/jam"><img src="https://agentmods.dev/badge/skills/loqwai/paper-cranes/jam.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 | $0.00044 | $0.01077 |
| Opus 5.5 | $0.00018 | $0.00431 |
| Sonnet 5.5 | $0.00009 | $0.00215 |
| Haiku 4.5 | $0.00004 | $0.00108 |
Grade A, and why
jam scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
!`curl -s -o /dev/null -w "%{http_code}" http://localhost:6969/ 2>/dev/null || echo "not running"` How it starts
The opening of the file, as written. The whole thing — 100 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Jam — Launch a Jam Page Session
Open the jam page (/jam.html) with a shader, optional controller, and music source. The jam page is lighter than the editor — the shader alone on screen + MIDI knobs + spacebar snapshots. No Monaco editor.
Context
Arguments (optional shader path, controller, or music URL):
!echo "$ARGUMENTS"
Dev server status:
!curl -s -o /dev/null -w "%{http_code}" http://localhost:6969/ 2>/dev/null || echo "not running"
Modified shaders in worktree:
!git diff --name-only HEAD | grep '\.frag$' | head -3 2>/dev/null; git status --short | grep '\.frag' | head -3 2>/dev/null
Available controllers:
!ls controllers/*.js 2>/dev/null | sed 's|controllers/||;s|\.js||'
Steps
1. Ensure the dev server is running
Check if localhost:6969 responds. If not:
npm run dev &
Wait for it (poll with curl, max 10 seconds).
2. Determine the shader
Parse $ARGUMENTS for a shader path. Fall back to:
- Most recently modified
.fragin the worktree redaphid/wip/the-coat-fur-coat/the-coat-3(the latest jam shader)
3. Determine the controller
Check if the shader has a matching controller in controllers/. Convention: shader the-coat-3.frag → controller the-coat.js.
If a controller exists, add &controller=<name> to the URL.
4. Determine the music source
Parse $ARGUMENTS for a URL (Spotify, SoundCloud, YouTube). If none provided, default to https://open.spotify.com.
5. Open Chrome and connect
- Ensure Chrome is running (
pgrep -x "Google Chrome"oropen -a "Google Chrome") - Call
tabs_context_mcpwithcreateIfEmpty: true - Create a tab for the music source and navigate there
- Create a tab for the jam page:
http://localhost:6969/jam.html?shader=<path>&audio=tab&controller=<name>
6. Verify the connection
Run on the jam page tab:
JSON.stringify({ cranes: !!window.cranes, shader: !!window.cranes?.shader })
7. Tell the user we're ready
Short and excited:
Jam page up with [shader]. [Music source] is ready. Play a track, share tab audio, and hit spacebar to snapshot. Let's go!
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.
- 5d ago Changed e1a32d756ea0
- 11d ago First seen · 100 lines · 44 tokens per session scan A a29654bc8509
jam is a skill published in the GitHub repository loqwai/paper-cranes (7 stars, last pushed 3d ago), licensed BSD-3-Clause. It adds 44 tokens to every session and 1,077 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-02.
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