The session handler is now a thin shell: three entry points in
kernel_turn.rs (run_kernel_turn / recover_turn / resolve_pending_call)
and the ChatSessionHandler. Everything that shaped a Value — projection,
recovery, compaction mechanics, the LLM loop, message building — lives
in agent-loop or behind a loop_adapters trait.
agent-loop:
- projection/ (mod + media): stored history -> wire messages, the one
place provider divergence lives; well-formedness contract, DTL
injections (append-only), media parts. LinearAssembler is now a
Projection + ProjectionHooks config, not its own implementation
- recovery.rs: reap interrupted batches -> resolve the deepest frame's
non-terminal calls (Running by policy + RestartHint, AwaitingHuman
re-asked) -> un-wedge finished children -> cascade up, every frame on
its own agent (B3)
- compaction.rs: split point (never assistant+tool group), transcript,
SUMMARY_PREFIX/preamble/template, the no-tools model call, summary row
- manager: resolve_pending (gate skipped, real ToolContext, then
continue incl. sub-agent); start_loop used by recovery; LiveInput
- delegate: AsyncExecutor + StoreSink for mode:async (durable cron row,
result delivered back into the parent conversation)
- kernel/context/store: support the above (TurnScope via Extensions,
frame lookups, aligned result-text semantics)
skald-core:
- loop_adapters: UserLoopRuntime (D12 - one LoopManager per user),
TurnScope (per-turn state in the Extensions type-map; no scope is
denied), projection_cfg/media_source/tool_digest (Skald's projection
knobs without owning projection code), async_task (CronExecutor +
DurableSink)
- session/handler: stripped to mod.rs + kernel_turn.rs + config.rs +
interface_tools.rs + media.rs; deleted agent_dispatch, approval,
dispatch, emitter, gate, llm_call, llm_loop, message_builder,
messages, outcome, resume
- compactor.rs: policy only (threshold, model pick, CompactionEvent);
mechanics are the crate's
CLAUDE.md updated (recovery, compaction, sub-agents, approval gate,
projection sections now describe the crate-owned flow).
Remove the scope system end-to-end (llm_models.scope column, agent meta
scope field, scope-based tier in model selection, UI checkboxes/pills):
it was only a soft ranking hint, had drifted (6 UI scopes vs 3 used by
agents, 'general' not even selectable) and duplicated what strength
already decides. Strength stays the single AUTO-selection axis.
Compaction: the summary model is now pickable from the Settings page
via a new PropertyType::LlmModel config property (registry key
compaction_model), instance-wide and live (no restart). Fallback chain:
explicit pick -> compaction.strength from config.yml -> priority order;
a deleted configured model degrades to AUTO. ContextCompactor reads the
key at compact time through GlobalConfigManager.
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