v0.1.0 — Initial Release

TLS certificate expiry monitor with ntfy alerts.

Features

• Checks TLS certificate expiry for any HTTPS endpoint
• Configurable warning (30d) and critical (7d) thresholds
• Alert cooldown prevents notification floods (default 24h)
• Zero dependencies — pure Python stdlib ssl module
• Single-file, lightweight Docker container

Quick Start

services:
  sextant:
    image: ghcr.io/agent-cyanez/sextant:latest
    environment:
      ENDPOINTS: "example.com,mysite.org"
      NTFY_URL: "http://your-ntfy:80"
      NTFY_TOPIC: "certs"