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apply_update's binary swap called `sudo install -m 0755 src /usr/local/bin/archipelago`. install opens the destination for write with O_TRUNC; the kernel returns ETXTBSY (exit 1) when the path is a currently-running executable, which it always is during apply because apply_update is called by the archipelago RPC handler — running as archipelago itself. Every previous "Failed to apply update" was this one root cause; the manual sideload path only worked because we stopped the service first. rename() doesn't modify the file it replaces — it repoints the path at a new inode while the old inode stays alive for any process that has it mapped. `mv` uses rename(). Switched to `sudo mv` (with prior chmod+chown on the staging file) so the swap is atomic and tolerant of the running binary. Frontend tarball byte-identical to v1.7.7-alpha; only the binary version string changes. Artefacts: archipelago 2753daec…48094d 40377648 archipelago-frontend-1.7.8-alpha.tar.gz 4fb79664…0172e9 76984615 (reused) Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>