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 skills add Demerzels-lab/elsamultiskillagent --skill megaethgit clone --depth 1 https://github.com/Demerzels-lab/elsamultiskillagentWrote 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/demerzels-lab/elsamultiskillagent/megaeth)<a href="https://agentmods.dev/skills/demerzels-lab/elsamultiskillagent/megaeth"><img src="https://agentmods.dev/badge/skills/demerzels-lab/elsamultiskillagent/megaeth/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/demerzels-lab/elsamultiskillagent/megaeth"><img src="https://agentmods.dev/badge/skills/demerzels-lab/elsamultiskillagent/megaeth.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 | $0.00109 | $0.01122 |
| Opus 5.5 | $0.00044 | $0.00449 |
| Sonnet 5.5 | $0.00022 | $0.00224 |
| Haiku 4.5 | $0.00011 | $0.00112 |
Grade A, and why
megaeth-developer 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 1mo 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.
This is a copy
100% identical to megaeth-developer — 0 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.
How it starts
The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MegaETH Development Skill
What this Skill is for
Use this Skill when the user asks for:
- Wallet setup and management on MegaETH
- Sending transactions, checking balances, token operations
- Token swaps via Kyber Network aggregator
- MegaETH dApp frontend (React / Next.js with real-time updates)
- RPC configuration and transaction flow optimization
- Smart contract development with MegaEVM considerations
- Storage optimization (avoiding expensive SSTORE costs)
- Gas estimation and fee configuration
- Testing and debugging MegaETH transactions
- WebSocket subscriptions and mini-block streaming
- Bridging ETH from Ethereum to MegaETH
Chain Configuration
| Network | Chain ID | RPC | Explorer |
|---|---|---|---|
| Mainnet | 4326 | https://mainnet.megaeth.com/rpc |
https://mega.etherscan.io |
| Testnet | 6343 | https://carrot.megaeth.com/rpc |
https://megaeth-testnet-v2.blockscout.com |
Default stack decisions (opinionated)
1. Transaction submission: eth_sendRawTransactionSync first
- Use
eth_sendRawTransactionSync(EIP-7966) — returns receipt in <10ms - Eliminates polling for
eth_getTransactionReceipt - Docs: https://docs.megaeth.com/realtime-api
2. RPC: Multicall for eth_call batching (v2.0.14+)
- Prefer Multicall (
aggregate3) for batching multipleeth_callrequests - As of v2.0.14,
eth_callis 2-10x faster; Multicall amortizes per-RPC overhead - Still avoid mixing slow methods (
eth_getLogs) with fast ones in same request
Note: Earlier guidance recommended JSON-RPC batching over Multicall for caching benefits. With v2.0.14's performance improvements, Multicall is now preferred.
3. WebSocket: keepalive required
- Send
eth_chainIdevery 30 seconds - 50 connections per VIP endpoint, 10 subscriptions per connection
- Use
miniBlockssubscription for real-time data
4. Storage: slot reuse patterns
- SSTORE 0→non-zero costs 2M gas × multiplier (expensive)
- Use Solady's RedBlackTreeLib instead of Solidity mappings
- Design for slot reuse, not constant allocation
What ships with it
11 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.
- 1mo ago First seen · 103 lines · 109 tokens per session scan A c2d74aadf44b
megaeth-developer is a skill published in the GitHub repository Demerzels-lab/elsamultiskillagent (10 stars, last pushed 5mo ago), licensed MIT. It adds 109 tokens to every session and 1,122 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to megaeth-developer, differing in 0 lines, and is treated as a copy.
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