Update README with install methods and agent skill setup

Add agent skill installation (npx skills add), curl installer,
Homebrew tap, and go install as the first section so users can
get started quickly.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: barckcode

README.md

@@ -4,38 +4,41 @@ A command-line tool for AWS cloud cost analysis and optimization. Scans your AWS
 
 **Local-first design** — your data stays on your machine. Reports never call cloud APIs.
 
-## Features
+## Install
 
-- **Multi-account support** — auto-detects AWS Organizations, scans all linked accounts
-- **Cost analysis** — monthly spend breakdown by service, region, and account
-- **Resource discovery** — finds EC2, RDS, S3, Lambda, ECS/EKS, ElastiCache, NAT Gateways, CloudFront distributions
-- **Anomaly detection** — statistical z-score analysis to flag cost spikes
-- **Period comparison** — side-by-side cost comparison between any two periods
-- **Commitment tracking** — Savings Plans and Reserved Instances utilization and coverage
-- **Rich reports** — HTML with embedded charts (Chart.js), CSV, JSON, and PDF output
-- **Incremental sync** — only fetches new data on subsequent runs
-- **Zero CGO** — pure Go binary, cross-compiles to Linux, macOS, and Windows
+### Agent Skill
+
+Add the FinOps skill to your AI agent (Claude Code, or any [skills.sh](https://skills.sh)-compatible agent):
+
+```bash
+npx skills add helmcode/finops-cli
+```
 
-## Installation
+This gives your agent the knowledge to use the FinOps CLI effectively — cost analysis, anomaly detection, report generation, and more.
 
-### From GitHub Releases (recommended)
+### CLI
 
-Download the latest binary for your platform from [Releases](https://github.com/helmcode/finops-cli/releases):
+#### Quick install (Linux / macOS)
 
 ```bash
-# macOS (Apple Silicon)
-curl -Lo finops.tar.gz https://github.com/helmcode/finops-cli/releases/latest/download/finops-cli_$(curl -s https://api.github.com/repos/helmcode/finops-cli/releases/latest | grep tag_name | cut -d'"' -f4 | sed 's/v//')_darwin_arm64.tar.gz
-tar xzf finops.tar.gz
-sudo mv finops /usr/local/bin/
+curl -fsSL https://raw.githubusercontent.com/helmcode/finops-cli/main/install.sh | sh
+```
 
-# macOS (Intel)
-# Replace darwin_arm64 with darwin_amd64
+The script auto-detects your OS and architecture, downloads the correct binary, verifies the SHA256 checksum, and installs it.
 
-# Linux (amd64)
-# Replace darwin_arm64 with linux_amd64
+#### Homebrew (macOS / Linux)
+
+```bash
+brew install helmcode/tap/finops-cli
 ```
 
-### From source
+#### Go install
+
+```bash
+go install github.com/helmcode/finops-cli@latest
+```
+
+#### From source
 
 Requires Go 1.25+:
 
@@ -46,6 +49,18 @@ make build
 # Binary at ./bin/finops
 ```
 
+## Features
+
+- **Multi-account support** — auto-detects AWS Organizations, scans all linked accounts
+- **Cost analysis** — monthly spend breakdown by service, region, and account
+- **Resource discovery** — finds EC2, RDS, S3, Lambda, ECS/EKS, ElastiCache, NAT Gateways, CloudFront distributions
+- **Anomaly detection** — statistical z-score analysis to flag cost spikes
+- **Period comparison** — side-by-side cost comparison between any two periods
+- **Commitment tracking** — Savings Plans and Reserved Instances utilization and coverage
+- **Rich reports** — HTML with embedded charts (Chart.js), CSV, JSON, and PDF output
+- **Incremental sync** — only fetches new data on subsequent runs
+- **Zero CGO** — pure Go binary, cross-compiles to Linux, macOS, and Windows
+
 ## Quick Start
 
 ### 1. Configure AWS credentials