account-rotation — switch coding-agent accounts on a rate limit

The moment: you hit a usage limit on a Claude Max / Codex Pro / Gemini subscription and want to keep working on a fresh account, or you're spreading swarm lanes across accounts for parallel quota. The tool depends on the host — because the credential layer differs by OS+agent. This skill routes; the tools do the swap.

Quick Start — route first

macOS + Claude            → claude-acct  (Keychain layer)
macOS + Codex/Gemini      → caam         (file layer)
Linux / WSL  + anything   → caam         (file layer)

Why the route exists (the load-bearing fact)