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docs: record hostname + design decisions and rejections

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Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Mortdecai
2026-09-15 18:55:36 -04:00
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DECISIONS.md
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@@ -5,8 +5,21 @@ Project-specific decisions. For global/cross-cutting decisions, see `~/bin/DECIS
Format: `YYYY-MM-DD: <decision> — <why>`
## Architecture
- 2026-09-15: Hostname `mac` — matches the short-lowercase machine naming (`bebop`, `yoga`); `ssh mac` alias already points at 192.168.0.94.
- 2026-09-15: Managed as `Brewfile` + idempotent `scripts/setup.sh` run over SSH from steel141 — seth is the console user so `defaults write` + `killall Dock` apply from SSH; GUI-only Tahoe toggles go in `docs/manual-checklist.md`.
- 2026-09-15: Backup = nightly launchd rsync (`-a --delete`) of `~/Music/Ableton` + `~/Documents` -> `pve173:/tank/backups/mac/`, with a ZFS snapshot cron on pve173 for history — rsync is transparent and Linux-familiar; the snapshot covers the `--delete`-mirrors-a-mistake weakness.
## Implementation
- 2026-09-15: Login shell = Homebrew bash 5 (`/opt/homebrew/bin/bash`) — Seth's steel141 shell is bash; Apple ships bash 3.2. zsh stays installed.
- 2026-09-15: GNU coreutils/findutils/sed/grep/tar on PATH via gnubin (unprefixed) — Linux muscle memory beats BSD-compat; if a Homebrew script trips on GNU sed, fix PATH order in `~/.bash_profile`, don't prefix.
- 2026-09-15: Window snapping = Rectangle — zero config; AeroSpace is the upgrade if tiling turns out to matter.
- 2026-09-15: Spotlight indexing stays on, Siri/web suggestions off — Finder search is useful; Live's browser has its own index.
- 2026-09-15: iCloud account stays, iCloud Drive Desktop&Documents sync OFF — cloud sync mid-save is a DAW project killer.
## Deferred / Rejected
<!-- Decisions NOT to do something are just as valuable -- prevents re-proposing rejected ideas -->
- 2026-09-15: Cmd<->Ctrl global swap REJECTED — Live 12 and every Mac tutorial are Cmd-native; kitty already handles Ctrl+Shift+C/V. Karabiner per-app remaps are the fallback, not a global swap.
- 2026-09-15: yabai REJECTED — useful features need partial SIP disable. SIP/Gatekeeper/FileVault all stay on.
- 2026-09-15: Time Machine REJECTED — over SMB it's fragile and whole-disk; rsync + tank-side ZFS snapshot covers the actual need.
- 2026-09-15: Removing `/System/Applications` apps REJECTED — sealed system volume; hide from Dock instead.
- 2026-09-15: Samples/projects on the SMB share REJECTED — local disk only; SMB is a copy source. External SSD is the capacity upgrade path.