nexoniarz/SchOS
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Carry project memory in the repo, with tools/memory-sync.sh

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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.
This commit is contained in:
Nexoniarz 2026-08-09 14:27:22 +02:00
commit 3182da3965
47 changed files with 2810 additions and 0 deletions
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.claude/memory/schunix-linux-abi-decision.md Normal file
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---
name: schunix-linux-abi-decision
description: Decided 2026-08-01 — Schunix drops its native syscall ABI and keeps only the Linux one
metadata:
node_type: memory
type: project
originSessionId: d1a1ea76-f919-411c-b0ef-0e1bc5064563
modified: 2026-08-01T17:16:39.021Z
---
Decided 2026-08-01: **Schunix will use the Linux syscall ABI as its only ABI.**
The native Schunix numbering gets deleted. Not yet implemented as of that date.
**Why:** the kernel currently carries two ABIs — 185 native entries in
`kernel/sys/table.inc` and 157 Linux numbers mapped in `kernel/sys/linux_abi.c`
— with a `proc->syscall_map` indirection on every syscall to pick between them.
100% of the shipping userland (musl, mksh, toybox) is Linux-ABI. Exactly one
program used the native ABI (`cmd/init/main.c`), and `exec.c` chose the ABI by
*guessing from the ELF entry address* (`>= 0x100000`).
**How to apply:** rebuild init against musl like every other program, then
delete `lib/usys.S`, `sys_enable_linux_abi`, the `syscall_map` indirection, the
entry-address heuristic in `exec.c`, and the duplicate native `struct stat`
path (`stati_linux` vs native). Roughly −500 lines.
The user was uneasy that this makes Schunix "not a real UNIX" — it does not.
FreeBSD (linuxulator), illumos (lx zones), and WSL1 all implement the Linux
ABI. The ABI is a calling convention, not the OS.
See [[schunix-rewrite-priorities]], [[schunix-build-environment]].