The marketplace step (step 5) emitted `git config --global
http.<host>/.sslVerify false` on AGNES_DEBUG_AUTH=1 instances when no
ca_pem was readable from AGNES_TLS_FULLCHAIN_PATH. Two problems:
1. Claude Code auto-mode classifiers ("do not disable TLS verification"
rule) block the line, breaking hands-free setup.
2. It silently masked operator misconfiguration — a debug-auth instance
without a fullchain on disk fell through to a TLS-disabled clone
instead of surfacing the missing cert.
After the cross-platform trust block (#137), self-signed and private-CA
servers are fully covered by step 0 reading the fullchain via
_read_agnes_ca_pem; publicly-trusted certs need no bootstrap at all.
The legacy fallback no longer covers a real scenario — verified by
running step 5 without sslVerify=false against a self-signed instance.
BREAKING: drops `self_signed_tls` parameter from
app.web.setup_instructions.resolve_lines and render_setup_instructions
(only consumed by the deleted block). The AGNES_DEBUG_AUTH env var
itself is unchanged — still gates /api/me_debug and the dropdown link.
Co-authored-by: Minas Arustamyan <arustamyan.minas@gmail.com>