Individual skill

event-design

Event-first contract design for efficient onchain data indexing. Use when designing contracts for The Graph, Dune, or any offchain indexing system. Covers indexed parameters, naming conventions, event costs, and designing contracts event-first.

skills/event-design/SKILL.md

Read pinned source

Source commit a53141f10a1bbf9c634e44af6bc5a29dd1660697

What was checked

Matches the observed repository HEAD: Yes
Scanner rules are current: No
Repository scan complete: No
Skill scan complete: Yes
Observed behavior: Not checked yet
Last checked: Nov 7, 2026

These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.

Install this skill

Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.

An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.

Repository context

Repository stars (not skill ratings): 132
Repository last updated: Oct 23, 2026
License: MIT

Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.

design Derived category
legal Derived category
data Derived category

Files and excerpt

File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.

Browse files

SKILL.mdcore · 6,255 bytes

Read excerpt


# Event Design

## Design Contracts Event-First

Events are the primary interface between onchain state and offchain systems. Design events **before** writing contract logic. Every state-changing function should emit at least one event.

```solidity
// Define events FIRST, then build the contract around them
interface IVaultEvents {
    event Deposited(address indexed user, address indexed token, uint256 amount, uint256 shares);
    event Withdrawn(address indexed user, address indexed token, uint256 amount, uint256 shares);
    event FeeCollected(address indexed collector, uint256 amount);
    event StrategyUpdated(address indexed oldStrategy, address indexed newStrategy);
    event EmergencyShutdown(address indexed triggeredBy, uint256 timestamp);