oz-math

oz-math is a command for coding agents from contract-hero/sui-pilot. It costs 17 tokens per session (268 once invoked), scanned A, original, MIT.

A checker for arithmetic in Move packages that looks for patterns that may be improved with OpenZeppelin math contracts, which are reusable smart-contract libraries.

In plain words
What is it for?
Use it on DeFi code such as pools, oracles, automated market makers, and vaults, then apply its suggested OpenZeppelin functions and fixes.
Why use it?
It helps identify arithmetic risks such as overflow-prone calculations, unchecked shifts, and manual scaling in code handling values or rates.

Command

Part of the sui-pilot plugin — 6 skills, 6 commands, 1 agent shipped together

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 commands/contract-hero/sui-pilot/oz-math
Clone the repo
git clone --depth 1 https://github.com/contract-hero/sui-pilot

Or install sui-pilot, the plugin that ships this one along with the rest of its 6 skills, 6 commands, 1 agent.

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 oz-math

README.md
[![agentmods](https://agentmods.dev/badge/commands/contract-hero/sui-pilot/oz-math.svg)](https://agentmods.dev/commands/contract-hero/sui-pilot/oz-math)
Your own site
<a href="https://agentmods.dev/commands/contract-hero/sui-pilot/oz-math"><img src="https://agentmods.dev/badge/commands/contract-hero/sui-pilot/oz-math.svg" alt="Measured on agentmods" height="20"></a>
Per session 17 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 268 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00017 $0.00268
Opus 5 $0.00009 $0.00134
Sonnet 5 $0.00003 $0.00054
Haiku 4.5 $0.00002 $0.00027

Measured 4d ago against content hash f1332bd58741, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

oz-math 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 4d 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.

commands/oz-math.md · 27 lines

What it actually says

Invoke the oz-math skill to analyze the Move package in the current directory for arithmetic patterns that could be improved using OpenZeppelin math contracts.

What This Command Does

  • Scans Move source files for arithmetic anti-patterns (overflow-prone multiply-divide, unchecked shifts, manual scaling)
  • Uses Move LSP to verify operand types and match to correct OZ module (u64, u128, u256)
  • Recommends specific OpenZeppelin functions with complete code fixes
  • Produces severity-scored findings with file:line references

When to Use

  • Before deploying DeFi code that handles token amounts, prices, or rates
  • When you see /move-code-review SEC-AR-* findings and want concrete fixes
  • After adding arithmetic logic to pools, oracles, AMMs, or vaults
  • When manually implementing math that might have library support
  • /move-code-review — Flags SEC-AR-* arithmetic security issues (this skill provides the fixes)
  • /move-code-quality — Style and idiom analysis (run before oz-math)
  • /specify — Author formal specs after applying oz-math recommendations
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. 4d ago First seen · 27 lines · 17 tokens per session scan A f1332bd58741

Subscribe to this mod's changes

oz-math is a command published in the GitHub repository contract-hero/sui-pilot (10 stars, last pushed 3d ago), licensed MIT. It adds 17 tokens to every session and 268 once invoked, about $0.0001 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 2026-08-31.