chore: enforce strict security and remove confidential data

docs/vibe-coding/vs-code.md

@@ -1,13 +0,0 @@
-# VS Code (Copilot Chat / Agent Mode)
-
-VS Code's built-in Copilot Chat and Agent Mode use the same
-`.github/copilot-instructions.md` mechanism described in
-[copilot-workspace.md](copilot-workspace.md) — set that up once and both the
-Workspace and the editor's inline chat/agent mode pick it up.
-
-- Enable `github.copilot.chat.codeGeneration.useInstructionFiles` in VS Code settings
-  if instructions aren't being applied automatically.
-- Path-scoped instructions: `.github/instructions/<name>.instructions.md` with an
-  `applyTo:` glob, same as Copilot Workspace.
-- These files should stay thin pointers to `AGENTS.md`/`SKILLS.md` — see
-  copilot-workspace.md for the exact pointer snippet.