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ADR 0006 deferred root-path unification because it "needs VFS
bind/alias machinery". Implement the /bin half: paths whose first
component is `bin` are rewritten to the first mounted volume whose
root has a \bin directory, so `ls /bin/cli`, `cat /bin/cli/x.efi` and
a binary's own fs_resolve("/bin/cli/x.efi") work without knowing the
volume UID.
The alias is transparent — it creates no node, so `ls /` keeps its old
listing and /bin simply does not exist when no system volume is
mounted — and allocates nothing for non-matching paths. exec::resolve
keeps its per-file volume scan (stricter for multiple volumes).
Update ADR 0006 to record the decision and what remains deferred
(\etc and friends at the root).
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ADR 0006: PE32+ loader in rsnix, versioned exports-table ABI constructed
per invocation, task-per-binary, single dd-able system image with
/bin/cli and /bin/gui, shell-owned grammar with injected line streams,
per-terminal input discipline as prerequisite phase, frozen built-in
core, 0.6.0 at first exec.
Plan: five phases (image → input discipline → loader/exec → streams +
migration → GUI binaries), each with a QEMU verification gate.
Glossary: Binary, Loader, Exports table, System image; kind = launch
surface.
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