3182da3965
Claude Code keeps per-project memory at <home>/.claude/projects/<key>/,
where <key> is the project's absolute path with every separator and the
drive colon turned into a dash. That makes it both rename-fragile and
machine-specific, and this project has hit each of those once:
- D:\DEV\Schunix -> D:\DEV\SchOS changed the key, and 43 memories were
invisible until moved across by hand.
- Development happens from Windows and from Linux, and each looks in a
different place for the same checkout.
Committing .claude/memory/ fixes both -- git carries it across renames
and between hosts -- and `import` puts it wherever the local machine
expects. .claude/settings.local.json stays ignored: those are per-machine
permissions.
The colon maps to a dash rather than being dropped. Deleting it gives
D-DEV-SchOS, which matches nothing and silently finds zero memories; that
was the first attempt. On Git Bash the key comes from `cygpath -w`,
because Claude Code is a Windows program and sees D:\DEV\SchOS, not
/d/DEV/SchOS.
1.9 KiB
| name | description | metadata | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| schfs-v2-and-ramdisk | The agreed SchFS direction and the ramdisk-root work completed 2026-08-01 |
|
Agreed plan for Schunix's filesystem and installer, and step 1 is done.
Order agreed 2026-08-01: ramdisk root → struct proc/exit codes/pgrp →
SchFS → mkfs into cmd/ → installer + framebuffer GUI.
SchFS keeps the name and is designed in docs/architecture/schfs-v2.md:
copy-on-write + checksum-in-parent-pointer + uberblock array (ZFS), one CoW
B-tree reused for every key type + extents with refcounts (btrfs), attribute
indexes for the "SQL-like" query feel (BeFS). Explicitly NOT doing: storage
pools/RAID-Z, online format conversion, dedup, or an actual query language —
the useful part of "database filesystem" is the index, not SQL. WinFS is the
cautionary tale; BeFS is the scale model.
Done — ramdisk root. make ramroot links a full SCHFS image into the
kernel and boots to a shell with no data disk attached (verified). Plain make
is unchanged. kernel/dev/ramdisk.c + a bdevrw() dispatcher in bio.c.
Also done — tools/mkfs content dedup, which is what made the ramdisk
practical: identical files now share one inode with real hard links
(nlink > 1). The 57 toybox applet copies collapsed from ~44 MB to one copy —
inodes 73 → 19, used blocks ~47,000 → ~3,400. mkfs also gained --size <blocks> so one tool builds both the big root image and the small ramdisk one.
Why it is opt-in: stage2 loads the kernel by PIO one sector at a time, so a
6 MB ramroot kernel is visibly slower to boot than the 350 KB default. Use
make ramroot, never make RAMROOT=1 — the flag changes CFLAGS, which make
cannot see, so stale objects would silently keep the wrong ROOTDEV.