What is claude-plugin-external CLAUDE.md?

Repository instructions for an Intercom integration used with Claude Code. The integration consists of Markdown skills and a remote service that connects Claude Code to Intercom workspaces.

Use it when editing the Intercom plugin, its skills, manifest, settings, or remote-service routing, including messenger installation, customer analysis, and customer-360 workflows.

It explains the project structure and runtime flow so developers can work on the integration without looking for a build system or compiled application that is not there.

How intercom/claude-plugin-external configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to intercom/claude-plugin-external. 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/intercom/claude-plugin-external/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/intercom/claude-plugin-external

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/intercom/claude-plugin-external/claude-md/github.svg)](https://agentmods.dev/instructions/intercom/claude-plugin-external/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/intercom/claude-plugin-external/claude-md"><img src="https://agentmods.dev/badge/instructions/intercom/claude-plugin-external/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/intercom/claude-plugin-external/claude-md"><img src="https://agentmods.dev/badge/instructions/intercom/claude-plugin-external/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 812 This file is loaded in full into every session.

When invoked 812 The same file — it is already loaded in full.

Security scan A 0 findings. 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.

Model	Per session	Once invoked
Fable 5.1	$0.00812	$0.00812
Opus 5.5	$0.00325	$0.00325
Sonnet 5.5	$0.00162	$0.00162
Haiku 4.5	$0.00081	$0.00081

Measured 21d ago against content hash 5173fdfe8938, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

claude-plugin-external CLAUDE.md 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 21d 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.

CLAUDE.md · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

What This Is

Intercom plugin for Claude Code and Google Antigravity — a skill-based integration (not compiled code). Skills are pure Markdown files the agent reads at runtime to interact with Intercom workspaces via a remote MCP server. Both platforms load the same skills/ directory.

Architecture

User → Claude Code CLI → Skill (SKILL.md) → MCP Server (https://mcp.intercom.com/mcp) → Intercom API

No build step, no dependencies, no tests. The plugin is entirely declarative.
.claude-plugin/plugin.json declares the intercom MCP server inline. Don't add a .mcp.json: Antigravity never loads it, and agy plugin validate --strict fails on it.
.claude-plugin/plugin.json is the plugin manifest for Claude Code's plugin registry.
.antigravity-plugin/plugin.json is the Antigravity Plugin Marketplace manifest. Antigravity reads MCP servers from mcp_config.json and the card logo from assets/logo.svg, both at the repo root.
Keep version in both manifests in step, and bump it on every published change so installed clients pick up the update.
The company is Fin and Intercom is its helpdesk product: use Fin for the publisher (author) and Intercom for the product and its features.
.claude/settings.local.json manages local permissions (currently allows WebFetch from raw.githubusercontent.com).

Skills

Three skills live under skills/, each in its own directory:

Skill	Trigger	Key Files
`install-messenger`	Explicit: `/intercom:install-messenger [framework]`	`SKILL.md`, `references/framework-guides.md`
`intercom-analysis`	Auto-triggered by keywords	`SKILL.md`, `references/mcp-tools.md`
`customer-360`	Explicit: `/intercom:customer-360 [email or company name]`	`SKILL.md`

Read the full file on GitHub · 58 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.

21d ago Changed · +3 lines · +145 tokens per session 5173fdfe8938
2mo ago First seen · 55 lines · 667 tokens per session scan A 971eb0d68ebd

Subscribe to this mod's changes

claude-plugin-external CLAUDE.md is an instructions file published in the GitHub repository intercom/claude-plugin-external (3 stars, last pushed 17d ago), licensed MIT. It adds 812 tokens to every session, about $0.0032 per session on Opus 5.5. 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 2026-08-30.

claude-plugin-external CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
claude-plugin-external CLAUDE.mdintercom/claude-plugin-external	Instructions file	3	17d ago	MIT	A	812	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,685	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,086	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	281k	today	MIT	A	4,335	Codex, OpenCode

claude-plugin-external: Instructions file for Claude Code