Borrowing it
Nothing to install: this file belongs to mercato-supply-chain/mercato-dapp. 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/mercato-supply-chain/mercato-dapp/develop/.agents/skills/stellar-dev/SKILL.mdgit clone --depth 1 https://github.com/mercato-supply-chain/mercato-dappWrote 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/mercato-supply-chain/mercato-dapp/stellar-dev)<a href="https://agentmods.dev/skills/mercato-supply-chain/mercato-dapp/stellar-dev"><img src="https://agentmods.dev/badge/skills/mercato-supply-chain/mercato-dapp/stellar-dev/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/mercato-supply-chain/mercato-dapp/stellar-dev"><img src="https://agentmods.dev/badge/skills/mercato-supply-chain/mercato-dapp/stellar-dev.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 | $0.00150 | $0.01656 |
| Opus 5 | $0.00075 | $0.00828 |
| Sonnet 5 | $0.00030 | $0.00331 |
| Haiku 4.5 | $0.00015 | $0.00166 |
Grade A, and why
stellar-dev 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 140 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Stellar Development Skill (Soroban-first)
What this Skill is for
Use this Skill when the user asks for:
- Soroban smart contract development (Rust)
- Stellar dApp frontend work (React / Next.js / Node.js)
- Wallet connection + signing flows (Freighter, etc.)
- Transaction building / sending / confirmation
- Stellar Asset issuance and management
- Client SDK usage (JavaScript, Python, Go, Rust)
- Zero-knowledge proof verification (where supported by target network/protocol)
- Privacy-preserving applications (privacy pools, confidential tokens)
- Local testing and deployment
- Security hardening and audit-style reviews
What this Skill is NOT for
- Bitcoin, Ethereum, Solana, or other non-Stellar blockchain development
- Stellar node/validator operation (see validators docs)
- General Rust programming unrelated to Soroban
- Stellar protocol governance or CAP authoring
Default stack decisions (opinionated)
1. Smart Contracts: Soroban (Rust)
- Use Soroban SDK (
soroban-sdkcrate) for all smart contract development - Contracts compile to WebAssembly (WASM)
- Use
#![no_std]- standard library not available - 64KB contract size limit - use release optimizations
- Prefer Stellar Assets over custom token contracts when possible
2. Client SDK: stellar-sdk (JavaScript) first
- Use
@stellar/stellar-sdkfor browser and Node.js applications - Supports both Stellar RPC and legacy Horizon API
- Full transaction building, signing, and submission
- Soroban contract deployment and invocation
3. API Access: Stellar RPC first (Horizon legacy-focused)
- Prefer Stellar RPC for new projects (JSON-RPC, real-time state)
- Horizon API remains available for legacy compatibility and historical-query workflows
- RPC: 7-day history for most methods;
getLedgersqueries back to genesis (Infinite Scroll) - Use Hubble/Galexie for comprehensive historical data beyond RPC
4. Token Strategy: Stellar Assets first
- Prefer Stellar Assets (classic issuance + trustlines) for fungible tokens
- Built-in ecosystem support (wallets, exchanges, anchors)
- Stellar Asset Contracts (SAC) provide Soroban interoperability
- Use custom Soroban tokens only for complex logic requirements
What ships with it
12 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 140 lines · 150 tokens per session scan A 6d348ef0a37a
stellar-dev is a skill published in the GitHub repository mercato-supply-chain/mercato-dapp (3 stars, last pushed 4d ago), licensed Apache-2.0. It adds 150 tokens to every session and 1,656 once invoked, about $0.0007 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.
Other skills, from other repositories
signature-replay
Signature replay attacks — missing nonces, missing chain ID, ecrecover zero address, signature malleability, cross-chain replay.
official-sui-skills
Pointer to the official Mysten Labs skills for building on Sui — language fundamentals, object model, PTBs, SDKs, publishing, upgrades, frontend integration, accessing on-chain data. Maintained upstream at github.com/MystenLabs/skills; pinned to the same ref the audit catalog derives from (see…
crypto-market-rank
Crypto market rankings and leaderboards. Query trending tokens, top searched tokens, Binance Alpha tokens, tokenized stocks, social hype sentiment ranks, smart money inflow token rankings, top meme token rankings from Pulse launchpad, and top trader PnL leaderboards. Use this skill when users ask about token rankings…
trading-signal
Subscribe and retrieve on-chain Smart Money signals. Monitor trading activities of smart money addresses, including buy/sell signals, trigger price, current price, max gain, and exit rate. Use this skill when users are looking for investment opportunities — smart money signals can serve as valuable references for…
bridge
Cross-chain token transfers using Wormhole and CCTP.
onchainkit
Build onchain apps with Coinbase's OnchainKit React components - wallets, swaps, NFTs, payments.