Preflight

Name: Preflight
Author: LLM Mart

No install snippet on purpose. A working MCP config is a command, its arguments and an environment block — the last two are where API keys live, so this catalogue never stores them and cannot publish them. Follow the link above for the authors' own instructions.

Docs • What's New • Examples • Community • Contributing

Why Your AI Tool Needs Observability

Your AI coding assistant makes hundreds of decisions every session — what to read, what to edit, when to run commands. But you can't see any of it. You know it was fast, but was it efficient? You got a PR merged, but how much did it cost? You fixed a bug, but did it get stuck in a loop first?

Preflight is observability for agentic coding — the actions, cost, and efficiency of your AI coding assistant as it works. See exactly what's happening, how much it costs, and where your AI is wasting time.

Local-first by design. Preflight runs entirely on your machine and sends your data nowhere by default. A live dashboard at localhost:7777 shows your sessions in real time, fully offline. Connect a New Relic account only when you want more — team rollups, alerting, and cross-session history. You choose: local-only, New Relic, or both.

Demo

Preflight dashboard animation

See cost breakdown, efficiency scoring, anti-patterns, and live session tracking in action.

What You Get

Visibility

Every action captured — file reads, edits, commands, searches
Live session dashboard — see what's happening right now
Historical trends — analyze patterns over weeks and months

Cost Control

USD spend tracking — per session, day, and week
Per-model and cache breakdown — know which models cost most and how efficiently context is reused
Budget alerts — get notified before you overspend
Forecasting — project monthly burn rate

Efficiency Insights

Efficiency score — 0–100 score per task, based on how directly the AI worked
Anti-pattern detection — catches re-reads, blind edits, stuck loops
Personalized recommendations — optimize your AI workflow
Weekly coaching reports — narrative analysis vs. your historical baseline

Dashboards

Local dashboard — live session view at localhost:7777, no account required
8 pre-built New Relic dashboards — deploy in seconds (New Relic mode):
- Overview — session stats, cost summary, top tools
- Personal — 30-day self-reflection scoped to you
- Session Detail — deep-dive into a single session's tool calls
- Team View — aggregated cost and efficiency across developers
- Manager View — high-level team metrics, no tool-call content
- Adoption & Cost — adoption momentum, spend, MCP usage, and per-developer outcomes for engineering managers
- Platform Comparison — Claude Code vs. Cursor vs. Windsurf, etc.
- Security Audit — audit trail of sensitive file access

Quick Start

1. Install

npm install -g @newrelic/preflight

Using Smithery? Installing Preflight from the Smithery MCP registry wires up the MCP server for you, but Smithery has no mechanism to write Claude Code hooks. After install, ask Claude Code to call the nr_observe_install_hooks MCP tool (it will offer to do this automatically once nr_observe_health reports setup_required: true), then restart Claude Code to activate monitoring.

2. Run setup

preflight setup

The wizard defaults to local mode — press Enter through the prompts and you're set. It wires Preflight into your AI tool (hooks + MCP server) and writes config to ~/.newrelic-preflight/. Takes under a minute, no account required.