chore: enforce strict security and remove confidential data

docs/vibe-coding/cursor-ide.md

@@ -1,12 +0,0 @@
-# Cursor IDE
-
-Same rules mechanism as [Cursor Composer](cursor-composer.md) — Composer is Cursor's
-agent mode within the same IDE, sharing `.cursor/rules/`.
-
-- Add the `.cursor/rules/agents.mdc` pointer rule described in cursor-composer.md
-  once; it applies to both chat/Tab completions and Composer/Agent mode.
-- Check **Settings → Rules** in the IDE to confirm the rule is active and
-  `alwaysApply: true` (so it's loaded on every request, not just glob-matched files).
-- If migrating an existing project off legacy `.cursorrules`, move its content into
-  `AGENTS.md`/`SKILLS.md` first, then replace `.cursorrules` with the pointer `.mdc`
-  file — don't maintain both.