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Cougr: Skill for Claude Code

.claude/skills/data/SKILL.md

data is a skill for Claude Code from salazarsebas/Cougr. It costs 77 tokens per session (3,537 once invoked), scanned A, a copy of data, MIT.

A reference for reading data from the Stellar blockchain through its RPC and Horizon APIs. It covers current chain state, transactions, events, streaming, pagination, and older historical data sources.

In plain words
What is it for?
Use it to read accounts, balances, ledgers, transactions, operations, contract events, and deeper historical records from Stellar.
Why use it?
It helps developers choose the appropriate Stellar data service instead of guessing which API or history source to use.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

This is salazarsebas/Cougr's own configuration. It tells Claude Code how to work on Cougr itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything Cougr configures →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is For a React/Next.js-specific setup, see [frontend-stellar-sdk.md](../dapp/SKILL.md)..

not rated 53repo 17d ago A scan 77 tokens copy · 86% MIT
View source ↗ salazarsebas/Cougr crates.io
Reuse

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.

Copy the file
curl -O https://raw.githubusercontent.com/salazarsebas/Cougr/main/.claude/skills/data/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/salazarsebas/Cougr

Made for: Claude Code.

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 data

README.md
[![agentmods](https://agentmods.dev/badge/skills/salazarsebas/cougr/data/github.svg)](https://agentmods.dev/skills/salazarsebas/cougr/data)
Your own site
<a href="https://agentmods.dev/skills/salazarsebas/cougr/data"><img src="https://agentmods.dev/badge/skills/salazarsebas/cougr/data/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.

agentmods 80×15 button for data

Your own site · 80×15
<a href="https://agentmods.dev/skills/salazarsebas/cougr/data"><img src="https://agentmods.dev/badge/skills/salazarsebas/cougr/data.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,537 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 86% copy Near-identical to another mod 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 5.1 $0.00077 $0.03537
Opus 5.5 $0.00031 $0.01415
Sonnet 5.5 $0.00015 $0.00707
Haiku 4.5 $0.00008 $0.00354

Measured today against content hash 199d62ad950e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

data 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 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.

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.

Origin

This is a copy

86% identical to data — 280 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/skills/data/SKILL.md · 547 lines

How it starts

The opening of the file, as written. The whole thing — 547 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Stellar Data: RPC + Horizon

API access for reading chain state. Stellar RPC is the preferred entry point for new projects; Horizon remains for legacy and historical-query workflows. For deeper history beyond RPC's 7-day window, use Hubble/Galexie.

When to use this skill

  • Calling Stellar RPC methods (getLatestLedger, getLedgerEntries, getEvents, simulateTransaction, sendTransaction)
  • Querying Horizon endpoints (accounts, transactions, operations, effects, ledgers)
  • Streaming live events or operations
  • Pulling historical data beyond RPC's 7-day window (Hubble, Galexie)
  • Choosing between RPC and Horizon for a given workflow
  • Building transactions to send → ../dapp/SKILL.md
  • Soroban contract simulation and event emission → ../soroban/SKILL.md
  • Asset balance and trustline lookups → ../assets/SKILL.md
  • Standards (SEP-7 deeplinks, SEP-10 auth) → ../standards/SKILL.md

Overview

Stellar provides two API paradigms:

API Status Use Case
Stellar RPC Preferred Soroban, real-time state, new projects
Horizon Legacy-focused Historical data, legacy applications

Recommendation: Use Stellar RPC for all new projects. Use Horizon mainly for historical queries and legacy compatibility paths.

Quick Navigation

Stellar RPC

Endpoints

Note: SDF directly provides Futurenet public RPC. For Mainnet RPC, select a provider from the RPC providers directory.

Network RPC URL
Mainnet Provider-specific endpoint (see RPC providers directory)
Testnet https://soroban-testnet.stellar.org
Futurenet https://rpc-futurenet.stellar.org
Local http://localhost:8000/soroban/rpc

Read the full file on GitHub · 547 lines

Files

What ships with it

30 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.

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. today First seen · 547 lines · 77 tokens per session scan A 199d62ad950e

Subscribe to this mod's changes

data is a skill published in the GitHub repository salazarsebas/Cougr (53 stars, last pushed 17d ago), licensed MIT. It adds 77 tokens to every session and 3,537 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 86% identical to data, differing in 280 lines, and is treated as a copy.

Web3 and blockchainblockchain-gamingecsgame-engineon-chain-gamessoroban
Related

data compared with skills from other repositories

data next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
datasalazarsebas/CougrSkill5317d agoMITA77Claude Code
frontend-designrylsherdamz-rgb/stellar-forgeSkill175d agoMITA51Claude Code
stellar-forgerylsherdamz-rgb/stellar-forgeSkill175d agoMITA82Claude Code
smart-contractsrylsherdamz-rgb/stellar-forgeSkill175d agoMITA44Claude Code
dapprylsherdamz-rgb/stellar-forgeSkill175d agoMITA48Claude Code
stellar-mcprylsherdamz-rgb/stellar-forgeSkill175d agoMITA61Claude Code
datarylsherdamz-rgb/stellar-forgeSkill175d agoMITA41Claude Code