agentmods.dev

gns3-mcp: Instructions file for Claude Code

CLAUDE.md

gns3-mcp CLAUDE.md is an instructions file for Claude Code from ChistokhinSV/gns3-mcp. It costs 6,740 tokens per session, scanned A, original, MIT.

A repository guide for the GNS3 MCP server, which lets AI agents work with GNS3 network-simulation labs. It covers lab control, device consoles, authentication, an SSH proxy and real-time notifications.

In plain words
What is it for?
Use it when changing GNS3 lab operations, device interaction, API access, notification streams or the SSH proxy.
Why use it?
It explains the project’s moving parts and current behavior so agents can make compatible changes to the server and its supporting services.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is ChistokhinSV/gns3-mcp's own configuration. It tells Claude Code how to work on gns3-mcp 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 gns3-mcp configures →

not rated 15repo +2 4mo ago A scan 6,740 tokens original MIT
View source ↗ ChistokhinSV/gns3-mcp
Reuse

Borrowing it

Nothing to install: this file belongs to ChistokhinSV/gns3-mcp. 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/ChistokhinSV/gns3-mcp/master/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/ChistokhinSV/gns3-mcp

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 gns3-mcp CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/chistokhinsv/gns3-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/chistokhinsv/gns3-mcp/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/chistokhinsv/gns3-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/chistokhinsv/gns3-mcp/claude-md/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 gns3-mcp CLAUDE.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/chistokhinsv/gns3-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/chistokhinsv/gns3-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 6,740 This file is loaded in full into every session.
When invoked 6,740 The same file — it is already loaded in full.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 $0.06740 $0.06740
Opus 5 $0.03370 $0.03370
Sonnet 5 $0.01348 $0.01348
Haiku 4.5 $0.00674 $0.00674

Measured 12d ago against content hash b1dd6b77dac7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

gns3-mcp CLAUDE.md 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 12d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

2. Test with curl:
CLAUDE.md · 758 lines

How it starts

The opening of the file, as written. The whole thing — 758 lines — stays where its author put it; the contents beside it link to each section on GitHub.

GNS3 MCP Server - Project Instructions

Project-specific instructions for working with the GNS3 MCP server codebase.

Project Overview

MCP server providing programmatic access to GNS3 network simulation labs. Includes:

  • Desktop extension (.mcpb) for Claude Desktop
  • Agent skill with GNS3 procedural knowledge
  • Console management for device interaction
  • GNS3 v3 API client with JWT authentication

Current Version: v0.54.0 (MCP Server) / v0.3.0 (SSH Proxy)

Latest Release: v0.54.0 - GNS3 Notification Stream Support SSH Proxy: v0.3.0 - Multi-Service Architecture (TFTP server, HTTP reverse proxy, HTTP client)

Recent Changes (v0.26.0 - v0.54.0)

v0.54.0 - GNS3 notification stream support

  • New notification tool: Subscribe to /v3/notifications real-time event stream
  • Actions: subscribe (controller/project-level), read (diff/all/last + filter), unsubscribe, status
  • Event types: node/link/drawing CRUD, log.error/warning/info, compute., template., ping
  • Background stream reader with auto-reconnect, buffer management (5000 max)
  • Tool count: 13 tools (up from 12)

v0.48.0 - List action integration in CRUD tools

  • Removed: list_projects(), list_nodes(), get_topology() convenience wrappers (3 tools removed)
  • Added: list action to project(), node(), link(), drawing() CRUD tools
  • Consistent Pattern: All CRUD tools now have list action with project_id and format parameters
  • Tool Count: 12 tools (down from 15 in v0.47.0) - 20% reduction
  • search_tools(): Updated TOOL_REGISTRY with new actions

SSH Proxy v0.3.0 - Multi-Service Architecture (TFTP, HTTP reverse proxy, HTTP client)

  • TFTP Server: tftpd-hpa on port 69/udp, read-write access, /opt/gns3-ssh-proxy/tftp root
  • HTTP Reverse Proxy: nginx on port 8023, URL: http://proxy:8023/http-proxy/<ip>:<port>/
  • HTTP Client: RESTful endpoint for making HTTP/HTTPS requests to device APIs
  • MCP Tools: Added tftp and http_client CRUD-style tools (14 tools total now)
  • Supervisor: Runs FastAPI, TFTP, and nginx in single container
  • GitHub Actions: Manual workflow for Docker build/push with automated Docker Hub description updates
  • Documentation: Updated ssh-proxy/README.md with features, architecture, API endpoints, usage examples

Read the full file on GitHub · 758 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. 12d ago First seen · 758 lines · 6,740 tokens per session scan A b1dd6b77dac7

Subscribe to this mod's changes

gns3-mcp CLAUDE.md is an instructions file published in the GitHub repository ChistokhinSV/gns3-mcp (15 stars, last pushed 4mo ago), licensed MIT. It adds 6,740 tokens to every session, about $0.0337 per session on Opus 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 2026-08-30.

gns3gns3-apigns3-appliancemcpmcp-server
Related

Other instructions, from other repositories

spec-kit AGENTS.md

AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.

github/spec-kit · 7,126 tokens

next.js AGENTS.md

AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.

vercel/next.js · 7,296 tokens

codex AGENTS.md

AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

openai/codex · 5,153 tokens

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 6,785 tokens

langchain AGENTS.md

AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.

langchain-ai/langchain · 4,469 tokens

vscode oss-third-party-notices.instructions.md

Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).

microsoft/vscode · 5,001 tokens