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