5993f32146
1. Filesystem type detection (architect P2 finding)
_primitives/_rust/keisei/src/fs_type.rs (NEW, 103 LOC)
- statfs(2)-based detection on unix (libc = '0.2' under
[target.'cfg(unix)'.dependencies])
- Recognizes exfat / msdos (FAT32) via f_fstypename on macOS,
via f_type magic numbers on Linux (0x4d44, 0x2011bab0)
- Windows stub returns Unknown (GetVolumeInformationW TBD)
- warn_on_unsafe_fs(root) emits stderr warning on ExFat/Fat32
brain.rs::load calls warn_on_unsafe_fs after canonicalize+symlink
checks. Warning NOT fatal — user can opt into single-client use.
2. Battle-test matrix (architect P3 finding)
tests/battle/Dockerfile.install-test-alpine (NEW)
- alpine:3.19 + apk rust/cargo/pandoc
- Exposes musl-vs-glibc issues in aws-sdk-s3, rusqlite, git2
tests/battle/Dockerfile.install-test-debian (NEW)
- debian:12 + rustup stable + pandoc
- Default server distro, different apt structure from Ubuntu
tests/battle/README.md rewritten — 3-distro matrix with run script
3. USB-BRAIN-GUIDE platform split
docs/USB-BRAIN-GUIDE.md — restructured as TOC + platform-agnostic
preamble + exFAT warning + cross-platform troubleshooting
docs/USB-BRAIN-GUIDE-macos.md (NEW, 97 LOC) — Gatekeeper, diskutil,
/Volumes, xattr -d com.apple.quarantine
docs/USB-BRAIN-GUIDE-linux.md (NEW, 98 LOC) — /media/$USER,
umount, ext4 recommended, systemd-udev auto-mount note
docs/USB-BRAIN-GUIDE-windows.md (NEW, 115 LOC) — PowerShell
Dismount-Volume, NTFS, FS-advisory Unknown caveat
REAL VERIFICATION (paste from agent):
cargo check -p keisei: Finished (clean)
cargo test -p keisei --release: 32 passed 0 failed (30 existing + 2 new)
docker buildx outline: both new Dockerfiles parse
Constructor Pattern:
fs_type.rs 103 LOC, brain.rs 198 LOC (at limit 200, held the line)
All fns <30 LOC. Each USB guide sub-doc 97-115 LOC.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
98 lines
3.5 KiB
Markdown
98 lines
3.5 KiB
Markdown
# USB Exobrain — Linux Walkthrough
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> Platform-specific companion to `USB-BRAIN-GUIDE.md`. Read the top-level guide first for prerequisites, warnings, and invariants.
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On Linux, auto-mounted removable media typically lands at `/media/$USER/<LABEL>` (GNOME, KDE, auto-mounters) or `/run/media/$USER/<LABEL>` (systemd-udisks2). Substitute your actual mount point below.
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## 1. Create the brain directory
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```bash
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BRAIN=/media/$USER/EXOBRAIN/my-brain
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mkdir -p "$BRAIN"/{bin,memory,artifacts,manifests}
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```
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## 2. Download MCP server binaries
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```bash
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BASE=https://github.com/KeiSei84/KeiSeiKit/releases/download/v0.21.0
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cd "$BRAIN/bin"
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for n in darwin-arm64 darwin-x64 linux-x64 linux-arm64 windows-x64.exe; do
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curl -fL -O "$BASE/kei-mcp-server-$n" 2>/dev/null || echo "skipped $n"
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curl -fL -O "$BASE/kei-mcp-server-$n.sha256" 2>/dev/null || true
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done
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for f in kei-mcp-server-*.sha256; do sha256sum -c "$f"; done
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chmod +x kei-mcp-server-linux-* kei-mcp-server-darwin-* 2>/dev/null || true
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```
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No Gatekeeper / `xattr` step on Linux. The `chmod +x` is still required — the executable bit is not restored by `curl`.
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## 3. Write `manifest.toml` (schema v2)
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```bash
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cat > "$BRAIN/manifest.toml" <<'EOF'
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[brain]
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schema_version = 2
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name = "my-brain"
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created = "2026-04-22T00:00:00Z"
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[paths]
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memory = "memory/"
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artifacts = "artifacts/"
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manifests = "manifests/"
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[paths.mcp_server]
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darwin-arm64 = "bin/kei-mcp-server-darwin-arm64"
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darwin-x64 = "bin/kei-mcp-server-darwin-x64"
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linux-x64 = "bin/kei-mcp-server-linux-x64"
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linux-arm64 = "bin/kei-mcp-server-linux-arm64"
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windows-x64 = "bin/kei-mcp-server-windows-x64.exe"
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EOF
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```
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## 4. Verify + attach
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```bash
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keisei list-adapters
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keisei status # "no brain attached"
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keisei attach "$BRAIN" --scope=user
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```
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Marker lands at `~/.keisei/attached.toml`; Claude Code settings at `~/.claude/settings.json`.
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## 5. Verify in Claude Code
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```bash
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jq '.mcpServers["my-brain"]' ~/.claude/settings.json
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```
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## 6. Multi-client mount
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```bash
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keisei mount "$BRAIN"
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```
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Linux adapter paths: `~/.claude/settings.json`, `~/.cursor/mcp.json`, `~/.continue/config.json`, `~/.config/zed/settings.json`.
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## 7. Project-scope
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```bash
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cd ~/path/to/your-repo
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keisei attach "$BRAIN" --scope=project # claude-code + cursor only
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```
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## 8. Detach + unmount
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```bash
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keisei detach
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umount /media/$USER/EXOBRAIN # or: sync && udisksctl unmount -b /dev/sdX1
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```
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If `umount` returns "target is busy", close any shell with its CWD under the mount, then retry. `lsof +f -- /media/$USER/EXOBRAIN` lists open handles.
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## Linux-specific troubleshooting
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- **Filesystem detection** — `keisei` calls `statfs(2)` at load time. exFAT (`EXFAT_SUPER_MAGIC = 0x2011bab0`) and FAT32 (`MSDOS_SUPER_MAGIC = 0x4d44`) trigger the SQLite-WAL-unsafe advisory. Format the USB as ext4 for reliable multi-client use.
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- **Auto-mounted `noexec` partitions** — some distros mount removable media `noexec` by default. If the mcp server refuses to run, remount read-write-executable: `sudo mount -o remount,exec /media/$USER/EXOBRAIN`. Alternatively add a line to `/etc/fstab` keyed by UUID (`blkid /dev/sdX1`).
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- **Permissions drift** — if you copy a brain from macOS via tar / rsync, the executable bit may not survive. Re-apply `chmod +x bin/kei-mcp-server-*`.
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- **Optional — systemd auto-attach** — a `systemd-udev` rule can run `keisei attach <mount>/my-brain --scope=user` whenever a labelled stick shows up, and a matching `udev` remove rule can call `keisei detach`. Out of scope for this guide; see `ArchWiki: Udisks#Auto-mount`.
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