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SRM default PATH is /usr/bin:/bin:/usr/sbin:/sbin:/usr/syno/bin — /usr/local/bin is NOT included. 'command -v /usr/local/bin/tailscaled' fails on busybox ash even when the file exists and is executable. Replaced with '[ ! -x "$BIN" ]' which is always reliable for absolute paths. Found during x5925 deployment testing. Daemon logged 'binary not found' despite the files being present at /usr/local/bin/tailscale[d]. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>