Fills a gap the blueprint names: the admin had to hand-author every
`mcp_catalog` entry. A remote feed of vetted connectors now proposes them
and the admin installs — the feed is *consultative*, so §14's risk axis is
untouched and the trust anchor stays on the box.
Marketplace client (`src/frontend/api/marketplace.rs`):
- Fetches the feed server-side (it sends no CORS headers) and caches it;
icons are proxied for the same reason.
- Verifies every declared SHA-256 before writing, fail-closed and
all-or-nothing. Feed-supplied paths are refused if they escape
`./scripts/<id>/`. Importing an `mcp_local` entry still demands the
admin-only `mcp.register_local_script`.
- Translates the feed's vocabulary into Skald's: `user`→`per_user`,
`mcp_local`→`local_script`. Scope is read, never inferred from transport
(a remote connector can be per-user — that is what `mcp.register_remote`
is for), and an unreadable `type` fails closed to the answer needing more
authority. The feed's `llm_short_description` maps to `description`, the
column `render_mcp_list` puts in front of the LLM for `activate_tools()`.
- Feed URL is config (`marketplace.url`), not a constant: an on-premise
product must not hard-require reaching one vendor's host.
Two silent failures found while wiring it:
- `transport_of` maps anything unknown to Stdio, so the feed's
`streamable-http` would have tried to spawn a command. Normalised on import.
- Some servers want their key as a query param, not a bearer header, and say
so with a `{key}` placeholder. Substituted at connect time in
`global_row_spec`/`user_row_spec` — never at rest, so the key stays in its
own column and the stored URL stays a template.
Pages, split by the question each answers:
- Connectors — what runs (`UserMcpView` = global ∪ per-user) and what I can
add. Same page for everyone; the admin just has more verbs. One Available
list with the verb per row: `per_user`→Activate, `global`→Enable globally.
Enabling a global is the admin's counterpart to activating a per-user one,
so the catalog picker dropdown is gone — the entry comes from the row.
- Connector Catalog (admin) — what this box offers. One `Add connector`
with two sources: marketplace first (vetted, hashed), manual second
(unvetted by nature) — the order mirrors the trust model.
- Marketplace (admin) — reached from the catalog, not the sidebar: it is a
destination of an action, not a place.
`available()` no longer returns `McpGlobalServerRow`: that row carries
`api_key` and this view now reaches every logged-in user. A slim `GlobalView`
crosses instead, and an admin sees every global (with `can_use` marking their
own) so one enabled for someone else stays manageable.
Also fixes `connectors-page` having no CSS rule at all — every sibling page
has one, so it never got `flex: 1` and left an empty column beside it.
Two changes developed together in one session; they share the same module
structure (db/mod.rs, the core lib root) and only compile together, so they
land as one commit.
## UserManager + per-user encryption (§9/§11)
New `users::UserManager`: owns the system.db pool plus a map
`userid -> SqlitePool` of unlocked databases. The pool *is* the unlock token —
its connect options carry the DEK as SQLCipher's raw key, so an open pool means
the key is in RAM until restart and dropping it re-locks (§9). Knows nothing
about cookies.
New `crypto` module: envelope encryption. A random 256-bit DEK encrypts
`{userid}.db`; `users.database_password` holds it sealed with AES-256-GCM under
`Argon2id(password, salt)`. The AEAD tag is the password verifier — one
derivation both authenticates and yields the key, so encrypted users store no
second hash. Cleartext users store the Argon2id output directly, compared in
constant time. Argon2 runs in spawn_blocking behind a 2-permit semaphore
(256 MiB per derivation).
- SQLCipher via `libsqlite3-sys` `bundled-sqlcipher-vendored-openssl`, pinned
<0.38 so it unifies with the one sqlx-sqlite links (a newer copy would apply
the feature to a SQLite sqlx never uses). OpenSSL is vendored and static, so
the binary stays self-contained.
- Schema split into `create_registry_tables` (instance-wide, no user key) and
`create_owner_tables` (one owner's content, identical in every file). No FK in
the owner bucket may reach the registry — enforced by a standalone test.
Dropped `chat_history.model_db_id` (write-only, and the only registry-crossing
key); moved `projects`/`project_tickets` into the owner bucket.
- Provisioning invariant: the file is written before the row, deleted after it,
so a crash leaves an orphan file, never a user without a database. `open_db`
never creates: a missing file is an error, not a silent empty database.
Not consumed yet: no login, call sites still use the shared system.db pool.
## Extract crates/skald-core
The headless core moves out of `src/` into its own crate; `skald` (server) and
the coming `skald-setup` are shells around it. Two dependencies on the shell
were inverted rather than dragged along, so the core names neither Tauri nor any
concrete plugin:
- `Plugin::tools(self: Arc<Self>)` — plugins contribute tools through this hook
(sibling of `http_router`), so the core no longer downcasts to
`MobileConnectorPlugin`.
- `tools::restart::set_restart_handler` — the desktop shell installs its
teardown-and-respawn; the core defaults to the supervisor exit code. The core
loses its `desktop` feature.
- `boot`'s stdout formatter moves to the binary (`src/boot_format.rs`); the core
only emits tracing events.
All 79 core tests pass; the binary boots and serves in a clean directory, and
the mobile-connector tools still register through the new hook.
dguiducci