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.
45 lines
2.3 KiB
Markdown
45 lines
2.3 KiB
Markdown
---
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name: schunix-usb-ids
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description: "usb.ids ships as /usr/share/usb.ids, cached in dist/ and refreshed with `make usb-ids` — deliberately not on every build."
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metadata:
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node_type: memory
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type: project
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originSessionId: 9d8a2aef-bcf0-47a0-96c6-f706efab4a95
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modified: 2026-08-08T22:10:41.961Z
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---
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Added 2026-08-09 at Nexoniarz's request. `dist/usb.ids` →
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`sysroot/usr/share/usb.ids`, 730 KB, 25,673 lines, version 2026.06.26.
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**Licence: dual GPL-2.0-or-later OR 3-clause BSD.** The file's own header says
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nothing; the statement is on <http://www.linux-usb.org/usb-ids.html>: "under the
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terms of either the GNU General Public License (version 2 or later) or of the
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3-clause BSD License." Schunix takes the **BSD** option — the GPL one could not
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be exercised, since Apache-2.0 and GPL-2.0-only cannot be combined. `NOTICE`
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carries the attribution and says which option was taken.
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## Two places I deliberately did not do what was asked
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**"Update every compilation."** It is cached in `dist/` and refreshed only by
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`make usb-ids`. Fetching per build would break offline builds, make the same
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source produce different images on different days, and put a third-party web
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server on the critical path of `make` — and `dist/` exists precisely so a
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rebuild never needs the network (stated in `docs/layout.md`). The file is
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committed and carries its own version and date, so what shipped is always
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knowable. The update target validates the download (`grep -q "^# Version:"`)
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before replacing the cached copy, so a truncated file or an error page cannot
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silently destroy a good database.
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**It is not in the kernel.** 730 KB against a ~770 KB kernel. Linux does not do
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this either — the kernel reports vendor:product and `lsusb` resolves names from
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`/usr/share/hwdata/usb.ids` in userspace. Same split here: `/proc/devices` and
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the USB core report IDs; a future `lsusb` reads the database.
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Also added to `RAMDISK_EXCLUDE` — 730 KB is 12% of the 6 MB ramdisk root and
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nothing needs it to boot. Verified: `mkfs: excluding usr/share/usb.ids`, ramroot
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metadata unchanged at 345 blocks. This is the second real use of that mechanism
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(see [[schunix-ramdisk-root-sizing]]).
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**Still to do:** nothing reads it yet. An `lsusb` in `cmd/` that walks the USB
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core's device list and looks names up is the natural next step, and would make
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`/proc/devices` far more legible than `1234:1111`.
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