native macOS codings agent orchestrator prowl.onev.cat

docs: document outgoing changes base ladder, switcher, and shortcut master

Update the diff-view manual with the resolution ladder, labeled base provenance, the in-window mode switcher, and the new entry points; register cmd-opt-shift-Y in the shortcut reference. Record the hardening plan, grilled decisions, and implementation notes as docs-ai/003-diff-window/006. Claude-Session: https://claude.ai/code/session_01Wke4shTaWo7wv6pGbTagVL


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