juice

A guide to Juice accounting, a measure of computation and data-transfer cost on the CVM. It covers transaction execution costs, Juice failures, and pricing new CVM operations.

In plain words
What is it for?
It is for reasoning about transaction costs, investigating a :JUICE failure, and pricing new operations in the CVM.
Why use it?
It helps explain or diagnose resource-cost errors and estimate the cost of adding an operation to the CVM.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/convex-dev/convex/juice
Any agent
npx skills add Convex-Dev/convex --skill juice
Clone the repo
git clone --depth 1 https://github.com/Convex-Dev/convex

Made for: Claude Code, Codex.

Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 135 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00040 $0.00135
Opus 5 $0.00020 $0.00068
Sonnet 5 $0.00008 $0.00027
Haiku 4.5 $0.00004 $0.00014

Measured 2d ago against content hash 321d54f7a2ac, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

juice 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 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.

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.

.agents/skills/juice/SKILL.md · 14 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 First seen · 14 lines · 40 tokens per session scan A 321d54f7a2ac

Subscribe to this mod's changes

juice is a skill published in the GitHub repository Convex-Dev/convex (117 stars, last pushed 2d ago), with no licence file. It adds 40 tokens to every session and 135 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.

Related

Other skills, from other repositories

rtc-balance

Check RustChain wallet balance, epoch info, and network status via the public RPC.

Scottcjn/Rustchain · 20 tokens

batch-token-price-lookup

Fetch current prices for multiple tokens on any blockchain network. Activates when users ask about token prices, price comparisons, or batch price lookups across 36 chains.

coinpaprika/claude-marketplace · 39 tokens

crypto-market-search

Search and analyze cryptocurrency market data using CoinPaprika. Activates when users search for coins, ask about prices, request market overviews, or look up tokens by contract address.

coinpaprika/claude-marketplace · 40 tokens

binance-tokenized-securities-info

Query Ondo tokenized US stock data on Binance Web3. Covers: supported stock token list, RWA metadata (company info, attestation reports), market and per-asset trading status (with corporate action codes for earnings, dividends, splits), real-time on-chain data (token price, holders, circulating supply, market cap), US…

ccxt/ccxt · 216 tokens

payment-assistant

Binance Pay Assistant - Send and Receive crypto payments. Send: QR code payment from Funding Wallet (C2C + PIX). Use when user wants to buy/purchase/pay/transfer/send, confirm/cancel payment, or query order status. Requires QR code data. PIX QR codes (pix, br.gov.bcb.pix) are auto-detected. Receive: Generate QR codes…

ccxt/ccxt · 119 tokens

ccxt-cli

CCXT command-line interface (ccxt-cli) for interacting with 100+ cryptocurrency exchanges directly from the terminal — no code required. Covers installing the CLI, calling any unified CCXT method (fetchTicker, fetchOHLCV, createOrder, fetchBalance), passing arguments and exchange-specific params, authenticating with…

ccxt/ccxt · 131 tokens