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.
npx agentmods add skills/nirholas/three.ws/sperax-usds-guidenpx skills add nirholas/three.ws --skill sperax-usds-guidegit clone --depth 1 https://github.com/nirholas/three.wsWrote 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/nirholas/three.ws/sperax-usds-guide)<a href="https://agentmods.dev/skills/nirholas/three.ws/sperax-usds-guide"><img src="https://agentmods.dev/badge/skills/nirholas/three.ws/sperax-usds-guide.svg" alt="Measured on agentmods" 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 | $0.00072 | $0.00952 |
| Opus 5 | $0.00036 | $0.00476 |
| Sonnet 5 | $0.00014 | $0.00190 |
| Haiku 4.5 | $0.00007 | $0.00095 |
Grade A, and why
sperax-usds-guide 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 yesterday.
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 — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.
USDs — Auto-Yield Stablecoin Guide
USDs is an auto-yield stablecoin on Arbitrum One built by Sperax. Holding USDs in your wallet automatically earns yield — no staking, no claiming, no gas fees for rewards.
How USDs Works
The Basics
- 1 USDs = 1 USD (soft peg maintained by mint/redeem arbitrage)
- Chain: Arbitrum One
- Collateral: 100% backed by USDC, USDC.e, and USDT
- Yield: Balances grow automatically via rebasing — just hold it
Mint & Redeem
Minting: Deposit 1 USD of collateral (USDC, USDC.e, or USDT) → receive 1 USDs (minus a small mint fee).
Redeeming: Burn USDs → receive your chosen collateral back (minus a small redemption fee).
The mint/redeem mechanism creates a natural arbitrage loop that keeps USDs pegged to $1:
- If USDs > $1 → arbitrageurs mint USDs (sell high)
- If USDs < $1 → arbitrageurs redeem USDs (buy low)
Auto-Yield Mechanics
USDs uses a rebase model. Instead of distributing reward tokens, the protocol increases everyone's USDs balance proportionally.
Yield source: Collateral (USDC, USDT) is deployed to battle-tested DeFi protocols:
- Aave V3
- Compound V3
- Fluid
- Stargate
- Curve
Yield distribution:
- 70% of strategy yield → USDs holders (via rebase)
- 30% of strategy yield → SPA buyback-and-burn
Max APY cap: 25% (excess yield accumulates in reserves)
Safety Mechanisms
- Collateral Ratio (CR): Must remain ≥100%. If CR drops >10%, protocol pauses
- Oracle: Chainlink price feeds via MasterPriceOracle
- Reserves: SPA reserves cover any collateral gaps
- Audited: Smart contracts audited by leading security firms
Common User Questions
"How do I earn yield?"
Just hold USDs in your wallet. Your balance increases automatically. No staking required.
"Where does the yield come from?"
From lending and liquidity protocols. Your collateral is put to work in DeFi (Aave, Compound, etc.) and the earnings flow back to you.
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.
- yesterday First seen · 98 lines · 72 tokens per session scan A 0d826446416b
sperax-usds-guide is a skill published in the GitHub repository nirholas/three.ws (110 stars, last pushed today), licensed Apache-2.0. It adds 72 tokens to every session and 952 once invoked, about $0.0004 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 2026-09-03.
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