Borrowing it
Nothing to install: this file belongs to salazarsebas/Cougr. 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/salazarsebas/Cougr/main/.claude/skills/soroban/SKILL.mdgit clone --depth 1 https://github.com/salazarsebas/CougrWrote 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/salazarsebas/cougr/soroban)<a href="https://agentmods.dev/skills/salazarsebas/cougr/soroban"><img src="https://agentmods.dev/badge/skills/salazarsebas/cougr/soroban/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/salazarsebas/cougr/soroban"><img src="https://agentmods.dev/badge/skills/salazarsebas/cougr/soroban.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 | $0.00091 | $0.17113 |
| Opus 5.5 | $0.00036 | $0.06845 |
| Sonnet 5.5 | $0.00018 | $0.03423 |
| Haiku 4.5 | $0.00009 | $0.01711 |
Grade A, and why
soroban scanned grade A with 1 finding 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 today.
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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl "http://localhost:8000/friendbot?addr=G..." How it starts
The opening of the file, as written. The whole thing — 2,581 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Soroban Smart Contracts
End-to-end guide for building Soroban contracts: writing them, testing them, securing them, and shipping advanced architectures. This skill bundles five concerns that live and die together - the contract code, the tests, the security posture, the design patterns, and the gotchas.
When to use this skill
- Writing a Soroban contract in Rust
- Setting up unit, integration, fuzz, or property tests
- Reviewing a contract for security issues (authorization, reentrancy-adjacent bugs, storage hygiene, TTL, overflow)
- Architecting upgradeable contracts, factories, governance, or DeFi primitives
- Debugging a Soroban-specific error (auth, storage, archival, resource limits)
Related skills
- Assets, trustlines, and SAC bridge →
../assets/SKILL.md - Frontend/wallets that call your contract →
../dapp/SKILL.md - Chain data queries (RPC/Horizon) →
../data/SKILL.md - ZK cryptography (BLS12-381, BN254, Poseidon) →
../zk-proofs/SKILL.md - SEP/CAP standards and ecosystem links →
../standards/SKILL.md
Part 1: Contract Development
When to use Soroban
Use Soroban when you need:
- Custom on-chain logic beyond Stellar's built-in operations
- Programmable escrow, lending, or DeFi primitives
- Complex authorization rules
- State management beyond account balances
- Interoperability with Stellar Assets via SAC
Quick Navigation
- Initialization and constructors: Project Setup, Contract Constructors (Protocol 22+)
- Core implementation patterns: Core Contract Structure, Storage Types, Authorization
- Advanced interactions: Cross-Contract Calls, Events, Error Handling
- Delivery workflow: Building and Deploying, Unit Testing, Best Practices
- ZK status guidance: Zero-Knowledge Cryptography (Status-Sensitive)
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.
- today First seen · 2,581 lines · 91 tokens per session scan A c3daeb8097f6
soroban is a skill published in the GitHub repository salazarsebas/Cougr (53 stars, last pushed 17d ago), licensed MIT. It adds 91 tokens to every session and 17,113 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-11-07.
soroban compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| sorobansalazarsebas/Cougr | Skill | 53 | 17d ago | MIT | A | 91 | Claude Code |
| smart-contractsrylsherdamz-rgb/stellar-forge | Skill | 17 | 5d ago | MIT | A | 44 | Claude Code |
| jolta16z/jolt | Skill | 1.1k | today | Apache-2.0 | A | 15 | Claude Code |
| solana-toolkit-guidenirholas/three.ws | Skill | 269 | yesterday | Apache-2.0 | A | 50 | Claude Code, Codex |
| solanaquicknode/solana-finance-claude-plugin | Skill | 101 | yesterday | MIT | A | 76 | Claude Code |
| smart-contractsstellar/stellar-dev-skill | Skill | 57 | today | Apache-2.0 | A | 151 | Claude Code |
| solana-developmenttenequm/skills | Skill | 39 | 2d ago | MIT | A | 53 | Claude Code, Codex |