codex: installer can update AGENTS.md (markers; --no-agents)#411

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kundeng wants to merge 3 commits intoobra:mainfrom

kundeng:pr/codex-agents

Commits on Feb 4, 2026

Add Node installer core + wire into Codex/KiloCode/OpenCode CLIs; update INSTALL docs to use flags
kundeng
committed
Codex installer: idempotently update ~/.codex/AGENTS.md (markers), add --no-agents flag; update docs
kundeng
committed
Codex installer: remove legacy duplicate Superpowers System block from AGENTS.md
kundeng
committed