TLS 1.3 Handshake

Every HTTPS connection you have ever debugged starts here. Change the version, key exchange, certificate chain depth and the 0-RTT / OCSP-stapling / client-certificate toggles and watch the server-computed round trips before your first byte, whether this key exchange survives the server's private key leaking, whether a verify depth that counts intermediates still reaches a trust anchor, what an unstapled revocation check costs on the critical path, and the replay window 0-RTT opens — validated against BoringSSL eada60b7 (SSL_do_handshake, tls13_advance_key_schedule, tls_seal_record) and OpenSSL 3.5.7 (X509_verify_cert).

• ✓All current + future modules
• ✓Full kata library
• ✓Progress dashboard + weak area analysis

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