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Skald-Circle/crates/skald-core
dguiducci 080ea736e4
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feat: signpost the virtual memory roots inside the container, instead of leaving them absent
`user-memory/` and `shared-memory/` live in SQLite, so nothing of them existed on
disk — and that nothing was worse than it looks. `cat user-memory/x.md` returned a
bare ENOENT, which a model reads as "the note is missing" rather than "wrong door";
and `mkdir -p user-memory && echo … > user-memory/x.md` *succeeded*, writing a real
file into the home that no reader ever visits (every reader goes to `memory_docs`)
and that the next `ls` then confirms as if it had worked.

Each root now gets a read-only bind mount holding a README that names the tools to
use instead. Read-only as a mount rather than as a mode: the container user has
passwordless sudo, so a chmod would be a suggestion, while `:ro` holds — remounting
needs CAP_SYS_ADMIN. Verified in a scratch container: write, sudo write, sudo chmod,
sudo mount -o remount,rw and sudo rm all fail. And a README rather than an empty
directory, because "Permission denied" is an error, not an instruction — models
answer it by reaching for sudo; the README puts the correction in the same directory
the failing command just named.

The mounts are deliberately not part of `UserFs`: they back no agent path and the
host-side fs-tools must never resolve into them. They reach existing containers as a
fourth self-heal axis in `reusable()`, not as an IMAGE_TAG bump — the image is
unchanged, and a bump would make every installation rebuild it to fix a mount.

The matching half is in `classify_memory`, which now strips the home spellings
(`./`, `~/`, `/root/`) before matching the root. Without it `~/user-memory/x.md`
missed the match and fell through to the disk router — becoming exactly the
invisible physical file the signpost exists to prevent.

`agents/common/memory.md` says the rule outright: the stores are reachable only
through the file tools and `memory_search`, never through `execute_cmd`.
2026-08-02 22:34:24 +01:00
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