Adds scripts/try-pr.sh — a helper to switch the global 'ao' command to
any session's worktree for manual testing, then restore back to main.
Usage:
bash scripts/try-pr.sh <session-id> # CLI/core/plugins only
bash scripts/try-pr.sh <session-id> --with-web # also builds + starts dashboard
bash scripts/try-pr.sh --restore # switch back to main
Also fixes isPortAvailable() to use a connect-based probe instead of
bind-based. The old approach had false positives on macOS when Next.js
listens on :: (IPv6 wildcard) — binding 127.0.0.1 succeeded even though
the port was taken. A TCP connect correctly detects any listener
regardless of which address it's bound to.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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