What is Harbor CLAUDE.md?

Repository instructions for Harbor, a desktop application and command-line tool that manages MCP servers across several coding-agent applications. MCP servers provide tools and data to AI agents.

Use them to build and test the desktop app or CLI, manage MCP servers, connect or disconnect integrations, synchronize configurations, and understand the project layout.

They explain how the Rust, Tauri, React, and TypeScript parts fit together and set rules for safely updating host configurations.

How JoshuaShunk/Harbor configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to JoshuaShunk/Harbor. 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/JoshuaShunk/Harbor/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/JoshuaShunk/Harbor

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/joshuashunk/harbor/claude-md/github.svg)](https://agentmods.dev/instructions/joshuashunk/harbor/claude-md)

Your own site

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

Per session 624 This file is loaded in full into every session.

When invoked 624 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	$0.00624	$0.00624
Opus 5.5	$0.00250	$0.00250
Sonnet 5.5	$0.00125	$0.00125
Haiku 4.5	$0.00062	$0.00062

Measured 2mo ago against content hash 02942572628f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Harbor 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 2mo 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.

Harbor

Universal MCP Hub — desktop app + CLI that manages MCP servers across Claude Code, Codex, VS Code, and Cursor.

Tech Stack

Rust + Tauri v2 + React 19 + TypeScript + Tailwind CSS + Axum

Project Structure

crates/harbor-core — Core library (config, connectors, gateway, vault, marketplace, fleet)
crates/harbor-cli — CLI binary (clap)
crates/harbor-desktop — Tauri v2 desktop app
ui/ — React frontend (Vite + Tailwind)

Build & Test

# Frontend
cd ui && npm ci && npm run build

# CLI
cargo build -p harbor-cli

# Desktop (requires Tauri prerequisites)
cd crates/harbor-desktop && cargo tauri dev

# Tests
cargo test --workspace

# Linting
cargo fmt --all -- --check
cargo clippy --workspace -- -D warnings

Key Conventions

Nautical naming theme for CLI commands (dock, undock, fleet, launch, anchor, port, sync, lighthouse, scout, chest, cargo, crew)
Config stored at ~/.harbor/config.toml
Connectors do safe merges into host configs (never overwrite)
Syncing routes through the lighthouse gateway for tool filtering, vault resolution, and hot reload
Host configs are auto-synced on dock/undock/toggle/connect
Desktop app auto-starts the lighthouse on launch
Users opt in to each host individually via harbor port link <host> or the Link button in the UI
vault: prefix in env vars references OS keychain secrets (resolved at runtime by the gateway)
Gateway starts HTTP server before initializing MCP servers (non-blocking)

Fleet Sync (harbor crew)

Fleet repo lives at ~/.harbor/fleet/ — a git repo containing harbor-fleet.toml
Fleet state (pull hashes) persisted at ~/.harbor/fleet-state.json
harbor_core::fleet module: config, git, merge, provision, state
FleetServerDef is the shareable subset of ServerConfig — omits enabled, auto_start, hosts, tool_hosts
Servers with source = "fleet" in local config are fleet-managed
Hash-based drift detection: SHA-256 of FleetServerDef stored after each pull; mismatches produce LocallyModified on the next pull (user changes are never silently overwritten)
Fleet git operations shell out to the git binary (no libgit2) — leverages user's existing SSH keys and credential helpers
Desktop: fleet_status and fleet_pull Tauri commands; server cards show fleet / modified badges; Settings has a Crew section with Pull button

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.

2mo ago First seen · 58 lines · 624 tokens per session scan A 02942572628f

Subscribe to this mod's changes

Harbor CLAUDE.md is an instructions file published in the GitHub repository JoshuaShunk/Harbor (2 stars, last pushed 5mo ago), licensed MIT. It adds 624 tokens to every session, about $0.0025 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 2026-08-31.

claude cli cursor desktop-app developer-tools mcp

Harbor CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
Harbor CLAUDE.mdJoshuaShunk/Harbor	Instructions file	2	5mo ago	MIT	A	624	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

Harbor: Instructions file for Claude Code