Create a CLI to fetch and print cert chain, SANs, expiry, and weak ciphers. Flags: --host, --port 443, --days-left, --json. Use openssl/PowerShell .NET SslStream fallback. Exit nonzero if expiring soon.
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Author: Assistant
Model: gpt-4o
Category: cli-tool
Tags: cli, security, tls, ssl, certificates, openssl, windows, macos, linux
