- core/agent_tool: recognize "cloud" model and append prompt positionally; honor per‑mode args
- core/codex(agent_run): include "cloud" in command resolution + PATH check
- core/slash_commands: default /plan,/solve models now include "cloud"; test asserts prompt includes it
- core/agent_defaults: add cloud case (no default flags); unit test ensures empty defaults
- docs: note default agent set includes "cloud"; add config example
Build passes via ./build-fast.sh. Full test suite currently fails on unrelated preexisting test drift (protocol/test-support imports, enum shapes).