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/stellar/stellar-dev-skill/cross-chainnpx skills add stellar/stellar-dev-skill --skill cross-chaingit clone --depth 1 https://github.com/stellar/stellar-dev-skillWhat 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 | $0.00160 | $0.01791 |
| Opus 5 | $0.00080 | $0.00896 |
| Sonnet 5 | $0.00032 | $0.00358 |
| Haiku 4.5 | $0.00016 | $0.00179 |
Grade A, and why
cross-chain 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.
How it starts
The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cross-Chain on Stellar
Stellar connects to other blockchains over several production rails, each built for a different job. Picking the wrong rail wastes engineering effort; picking the right one is a routing decision, not a research project. This file routes; the deep dives live alongside it — read the file that matches the task:
| You want to | Use | Where |
|---|---|---|
| Move native USDC between Stellar and an EVM chain or Solana (no wrapped assets, no liquidity pools) | Circle CCTP V2 | cctp.md |
| Have a Stellar contract call a contract on another chain, or receive calls from one (arbitrary payloads) | Axelar GMP | axelar.md |
| Make a token — new or an existing Stellar asset — exist on multiple chains | Axelar ITS | axelar.md |
| Swap any asset cross-chain (BTC, ETH, SOL, … → XLM or Stellar USDC) without integrating a bridge yourself | NEAR Intents | below |
Rules of thumb: if the asset is USDC and both ends are CCTP chains, CCTP is the cheapest and most direct (it burns and mints Circle-native USDC — nothing wrapped, nothing pooled). If you need logic, not just value, on the far chain, that is message passing — Axelar GMP is the rail for it. If you control a token and want it multichain, that is ITS. If the user just wants "turn my X on chain A into Y on Stellar" and you don't want bridge plumbing at all, quote it through NEAR Intents.
When to use this skill
- Bridging USDC between Stellar and Ethereum, Base, Arbitrum, Solana, or another CCTP-supported chain
- Receiving bridged USDC into a Stellar account or contract (and not bricking the funds — see the forwarder warning below)
- Writing a Stellar smart contract that sends messages to or receives messages from contracts on other chains
- Deploying an interchain token, or connecting an existing Stellar asset to other ecosystems
- Adding a "deposit from any chain" or cross-chain swap flow to a wallet or dapp
What ships with it
2 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.
- 2d ago First seen · 62 lines · 160 tokens per session scan A 5d437e0e14cc
cross-chain is a skill published in the GitHub repository stellar/stellar-dev-skill (51 stars, last pushed 4d ago), licensed Apache-2.0. It adds 160 tokens to every session and 1,791 once invoked, about $0.0008 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.
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