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didericis caf1da580a feat(firecracker): group-owned TAP pool for multi-user hosts
Add a `group` option to the netpool NixOS module + BOT_BOTTLE_FC_GROUP to
the shell script: when set, the pool's TAP devices are owned by a group
instead of a single user, so any group member can open them (the kernel
lets a TAP's owning-group members attach). This lets an interactive user
and, say, a CI-runner user share one pool. `owner`/`group` are mutually
exclusive (asserted). Single-user `owner` remains the default.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WBMWTEtQdJ4W5UrWuLHCck
2026-07-12 16:17:37 -04:00
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