Updates platform-codes.yaml against verified primary docs for all 24 supported
platforms. 14 platforms (auggie, codex, crush, cursor, gemini, github-copilot,
kilo, kimi-code, opencode, pi, roo, rovo-dev, windsurf) move their project
target_dir to the cross-tool .agents/skills/ standard. Junie moves from the
broken .agents/skills/ to its own .junie/skills/ per JetBrains docs.
Adds global_target_dir to every platform: 11 share ~/.agents/skills/, Crush
uses XDG ~/.config/agents/skills/, Codex global stays ~/.codex/skills/, the
rest are tool-specific. Ona and Trae omit global (no documented home path).
Note: installer logic does not yet dedupe writes for platforms sharing a
target_dir — users installing multiple .agents/skills/ tools together will
overwrite the same files (harmless on install, but uninstalling one clears
the dir for the others). Coordination logic is the next step.
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