Add 5 pi extensions: pi-subagents, pi-crew, rpiv-pi, pi-interactive-shell, pi-intercom

extensions/pi-crew/skills/safe-bash/SKILL.md

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+---
+name: safe-bash
+description: Safe shell-command workflow. Use whenever a task may execute shell commands, especially to prefer read-only commands and avoid destructive actions without confirmation.
+---
+
+# safe-bash
+
+Use this skill whenever a task may execute shell commands.
+
+## Rules
+
+- Prefer read-only commands first: `pwd`, `ls`, `find`, `rg`, `git status`, package-manager dry runs.
+- Before mutating commands, explain the target path and expected effect.
+- Never run destructive cleanup (`rm -rf`, `git clean`, force delete, prune, reset hard) without explicit confirmation.
+- Avoid shell-specific assumptions when a cross-platform Node/Pi API exists.
+- On Windows, prefer argv-based process execution and avoid `cmd /c start` or `/bin/bash` unless explicitly required.
+- Capture verification output and summarize exit status.
+
+## Reporting
+
+Mention commands run and whether they were read-only or mutating.