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

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.

.claude/memory/schunix-syscall-single-table.md

@@ -0,0 +1,36 @@
+---
+name: schunix-syscall-single-table
+description: Syscalls are declared once in kernel/sys/table.inc — never hand-edit linux_abi.c
+metadata: 
+  node_type: memory
+  type: project
+  originSessionId: d1a1ea76-f919-411c-b0ef-0e1bc5064563
+  modified: 2026-08-01T19:34:55.691Z
+---
+
+Since 2026-08-01 a Schunix syscall is declared in exactly **one** place:
+
+```
+SYSCALL(nr, linux_nr, name)          // kernel/sys/table.inc
+SYSCALL_ALIAS(linux_nr, name)        // extra Linux number -> existing handler
+```
+
+and implemented as `SYSCALL_DEFINE(name) { ... }` in a `kernel/sys/sys_*.c`.
+
+Generated from that one line: the `SYS_*` enum (`include/syscall.h`), the
+dispatch table (`kernel/sys/syscall.c`), and the Linux ABI translation map
+(`kernel/sys/linux_abi.c`).
+
+**Why:** it used to take three edits in two files — a `table.inc` line, a
+`#define LINUX_foo N`, and a map entry. Forgetting the second file left the
+syscall unreachable from every musl-linked program while looking correctly
+registered. `linux_abi.c` went from 361 hand-written lines to 34 generated ones.
+
+**How to apply:** never add anything to `linux_abi.c` — there is nothing to
+edit there. `NO_LINUX` marks a syscall with no Linux equivalent; all such
+entries collide on scratch index 511, which is never dispatched.
+
+184 syscalls, 150 with Linux numbers, 7 aliases (vfork→fork, preadv→readv, …).
+
+See [[schunix-linux-abi-decision]] — dropping the native ABI entirely is still
+the plan; this refactor is the prerequisite, not a replacement for it.