p2p-dos-and-eclipse

p2p-dos-and-eclipse is a skill for Claude Code, Codex from PlamenTSV/plamen. It costs 45 tokens per session (3,974 once invoked), scanned A, original, MIT.

A code-audit skill for peer-to-peer blockchain networking. It examines how nodes discover, connect to, exchange data with, and defend against other nodes.

In plain words
What is it for?
It is for reviewing peer limits, message handling, resource costs, discovery, Kademlia or devp2p tables, and resistance to denial-of-service and eclipse attacks.
Why use it?
It helps find attacks that exhaust resources, amplify traffic, isolate a node from honest peers, or poison the peer-discovery table. An eclipse attack is one that surrounds a node with attacker-controlled peers.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It is for reviewing peer limits, message handling, resource costs, discovery, Kademlia or devp2p tables, and resistance to denial-of-service and eclipse attacks.

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Install with agentmods
npx agentmods add skills/plamentsv/plamen/p2p-dos-and-eclipse
Install

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.

Any agent
npx skills add PlamenTSV/plamen --skill p2p-dos-and-eclipse
Clone the repo
git clone --depth 1 https://github.com/PlamenTSV/plamen

Made for: Claude Code, Codex.

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 p2p-dos-and-eclipse

README.md
[![agentmods](https://agentmods.dev/badge/skills/plamentsv/plamen/p2p-dos-and-eclipse/github.svg)](https://agentmods.dev/skills/plamentsv/plamen/p2p-dos-and-eclipse)
Your own site
<a href="https://agentmods.dev/skills/plamentsv/plamen/p2p-dos-and-eclipse"><img src="https://agentmods.dev/badge/skills/plamentsv/plamen/p2p-dos-and-eclipse/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 p2p-dos-and-eclipse

Your own site · 80×15
<a href="https://agentmods.dev/skills/plamentsv/plamen/p2p-dos-and-eclipse"><img src="https://agentmods.dev/badge/skills/plamentsv/plamen/p2p-dos-and-eclipse.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,974 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Excessive Agency · line 62
    Skill allows unbounded resource consumption (API calls, storage, compute). Without rate limits or quotas, a compromised or misbehaving agent can cause denial-of-service or cost overruns.
    Fix: Set explicit rate limits, timeouts, and resource quotas for API calls, file operations, and compute. Implement circuit breakers for runaway loops.
How audits are shown
Origin original No closer match found 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 $0.00045 $0.03974
Opus 5 $0.00023 $0.01987
Sonnet 5 $0.00009 $0.00795
Haiku 4.5 $0.00005 $0.00397

Measured 6d ago against content hash 4dec2269313f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

p2p-dos-and-eclipse 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 6d 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.

agents/skills/injectable/l1/p2p-dos-and-eclipse/SKILL.md · 240 lines

How it starts

The opening of the file, as written. The whole thing — 240 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Injectable Skill: P2P DoS and Eclipse Attacks

L1 trigger: L1_PATTERN=true AND (p2p/ OR network/ OR discovery/ OR libp2p OR devp2p OR enr OR discv5 detected in recon subsystem map) Inject Into: depth-network-surface Language: Go and Rust Finding prefix: [P2P-N] Status: v0.1 draft, Round 4 exemplars pending

Orchestrator Decomposition Guide

  • Sections 1, 2: depth-network-surface (attack surface + DoS)
  • Section 3: depth-state-trace (peer table state)
  • Section 4: depth-edge-case (boundary/adversarial peer states)

When This Skill Activates

Recon identifies a P2P subsystem. Most attacks in this class are out-of-scope for typical bounty programs but are in scope for Plamen audits — firms like Sigma Prime and OpenZeppelin explicitly cover them. Severity downgrades to Low/Info when the exploit only eclipses a single node (see severity-matrix.md); upgrades when reachable by arbitrary peers and amplifies across the network.

1. Attack Surface Enumeration (Entry Points)

Every P2P subsystem has a finite set of entry points for remote adversary bytes. Enumerate them using LSP workspace/symbol and ast-grep:

Entry point type How to find Example functions
Message handlers Trait/interface impl names ending in Handler, Service, Listener handleGetBlockHeaders, on_new_pooled_transaction_hashes
Decoders Functions taking &[u8] or Reader and returning protocol types decode_enr, rlp_decode
Connection accepters TCP/QUIC listener accept loops acceptLoop, handle_connection
Discovery responders UDP packet handlers for discovery protocol handleDiscv5Packet, process_find_node
Gossip handlers Pubsub topic subscribers process_gossip_message

Write the enumeration into scratchpad/p2p_surface.md before proceeding.

2. DoS Classes to Check per Entry Point

2a. Asymmetric processing cost

Attacker sends N bytes, node does O(N²) or O(N*log(N)) work. Classic example: decompression bombs, hash-map insertion of attacker-chosen keys (hash DoS), large RLP lists.

Read the full file on GitHub · 240 lines

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. 6d ago First seen · 240 lines · 45 tokens per session scan A 4dec2269313f

Subscribe to this mod's changes

p2p-dos-and-eclipse is a skill published in the GitHub repository PlamenTSV/plamen (295 stars, last pushed 2d ago), licensed MIT. It adds 45 tokens to every session and 3,974 once invoked, about $0.0002 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 2026-09-03.

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