Add the foundational types for ADR-049 streaming handlers:
- StreamingHandler, ResponseStream type aliases and HandlerKind enum
(Once | Stream) in registration.rs, with make_streaming_handler() helper
- CallError::invalid_operation_type() in wire.rs (sixth protocol code,
retryable: false)
- HandlerRegistration.handler flipped from Handler to HandlerKind;
HandlerRegistration::new() now takes HandlerKind
- OperationRegistryBuilder absorbs wrapping: with_local/with_leaf/
with_leaf_provenance wrap raw Handler in HandlerKind::Once for
Query/Mutation; new with_local_streaming/with_leaf_streaming take a
StreamingHandler and wrap in HandlerKind::Stream for Subscription.
Builder validates kind matches spec.op_type (mismatch = startup error)
- OperationRegistry::register() returns Result<(), String> with a clear
mismatch message; all call sites updated to handle the Result
- invoke() matches on HandlerKind: Once -> existing path; Stream ->
INVALID_OPERATION_TYPE error envelope (guards against silent
truncation; invoke_streaming() added in a downstream task)
- OverlayOperationEnv::invoke_with_policy matches on HandlerKind:
Once -> dispatch; Stream -> INVALID_OPERATION_TYPE (composition is
request/response-only)
- Migrated every HandlerRegistration::new() construction site (~95)
to wrap raw Handler in HandlerKind::Once(handler); the builder sites
are handled by the builder-absorbs-wrapping change
- Updated two websocket subscription tests that relied on Subscription
ops dispatching via invoke() to expect INVALID_OPERATION_TYPE
- Added unit tests for invoke/register validation and
make_streaming_handler
Make Dispatcher::dispatch_requested pub and extract abort-cascade handling
into a pub handle_abort method so the WebSocket handler can feed deserialized
EventEnvelopes directly to the shared Dispatcher without a QUIC Connection.
CallConnection gains a new_overlay_only(identity) constructor (Option A) that
holds the Layer 2 overlay, PendingRequestMap, and resolved bearer Identity
without a QUIC Connection; identity() reads the stored field for the non-QUIC
case. compose_root_env uses the new identity() accessor for both paths.
The existing QUIC path (CallAdapter, CallClient, run_loop, handle_stream) is
unchanged — outgoing client methods guard on connection().is_none().
The #1 gap in alknet-call: the outbound connection opener. Every downstream
consumer (runner, container service, bilateral exchange, NAPI, agent
cross-node dispatch) is blocked on it.
Shared dispatch loop (ADR-017 §1 — the architectural commitment that keeps
CallClient from becoming a parallel protocol implementation):
- Extracts the accept-path dispatch (sweeper, accept_bi loop, handle_stream,
dispatch_requested, build_root_context, compose_root_env, fail_all on
close) out of CallAdapter into a new protocol/dispatch.rs Dispatcher struct.
Both CallAdapter::handle and CallClient::connect produce a CallConnection
and hand it to Dispatcher::run_loop — the loop is genuinely shared
(refactored, not duplicated).
- CallAdapter keeps its public API and test-facing wrappers (pub(crate),
#[cfg(test)]-gated) that delegate to the Dispatcher.
Peer-scoped default-deny (ADR-028 — the one-way-door security dimension):
- RemoteFilter { trusted_peer: bool } on the Dispatcher. In default-deny
mode (CallClient::new), an incoming call to an op with remote_safe: false
returns NOT_FOUND *before* any capability material reaches the handler —
a remote peer's call must not populate OperationContext.capabilities from
the local registration bundle unless the op is explicitly remote-safe
(ADR-028 Context). Trusted-peer mode (CallClient::trusted_peer, explicit
opt-in) bypasses the filter.
- The accept path (CallAdapter) uses RemoteFilter::trusted() by convention: a
direct QUIC client is not a filtered CallClient peer in the ADR-028 sense.
- OperationRegistry::list_operations_peer_scoped(trusted_peer) +
services_list_handler_peer_scoped for the CallClient's services/list
serving path (ADR-028 Assumption 2: a peer should not see ops it cannot
call, so discovery and dispatch filters agree).
CallClient (src/client/call_client.rs):
- CallClient { registry, identity_provider, trusted_peer: bool }.
- new() default-deny; trusted_peer() explicit opt-in (ADR-028 §3).
- connect(addr, CallCredentials) dials QUIC on ALPN alknet/call (quinn
feature), spawns Dispatcher::run_loop, returns a live CallConnection.
- spawn_dispatch(connection) shared path for connect + tests.
- CallCredentials { tls_identity, auth_token, remote_identity } — all from
Capabilities (ADR-014), never env vars (no-env-vars invariant). v1
connects without client-auth TLS identity (server uses
AcceptAnyCertVerifier); RawKey client-auth is a two-way-door remainder.
- RemoteIdentity { fingerprint } — concrete shape is a two-way door (OQ-25
remainder); the one-way constraint is it comes from Capabilities.
- ClientError { Transport, TlsSetup, ConnectionClosed }.
- CallConnection is now Clone (shares the inner Arcs) so connect can hand
the caller a live clone while the dispatcher task keeps its clone.
Tests (199 lib + 1 integration):
- Unit: default-deny NOT_FOUND for non-remote-safe; remote_safe dispatches;
trusted-peer dispatches all External; default-deny does NOT populate
capabilities (the load-bearing security assertion — verified by a handler
that inspects context.capabilities and the fact that the handler is never
reached for non-remote-safe ops); remote_safe op populates capabilities;
services/list peer-scoped hide/trusted variants; CallClient constructors;
CallCredentials builder; Send+Sync.
- Integration (tests/two_node_call.rs): real QUIC loopback — CallAdapter
server (self-signed cert via rcgen) accepts, CallClient connects,
client.call() round-trips to server/echo. Proves the connect path +
shared dispatch loop work end-to-end.
clippy + fmt + test all green.
Refs: tasks/call/client/call-client.md
Refs: docs/architecture/decisions/017-call-protocol-client-and-adapter-contract.md §1, §2, §7
Refs: docs/architecture/decisions/028-callclient-peer-scoped-registry-filtering.md
Refs: docs/architecture/crates/call/client-and-adapters.md
W1 (call/protocol/abort-cascade-wiring): wire AbortCascade into
CallAdapter handle_stream for EVENT_ABORTED. Cascades with
AbortPolicy::AbortDependents, aborts root, no descendant frames on
wire (ADR-016 Decision 2). Two integration tests added.
W2 (core/endpoint-client-fingerprint): extract TLS client cert
fingerprint in dispatch_quinn (SHA256:<hex> of leaf cert DER via
peer_identity) and dispatch_iroh (ed25519:<hex> of peer NodeId).
Fingerprint format documented in auth.md. Server config change
(with_no_client_auth → request-but-don't-require) deferred to new
follow-up task core/endpoint-request-client-cert.
W3 (vault/mnemonic-debug-redaction): replace Mnemonic derive(Debug)
with manual redacting impl (phrase: "[REDACTED]"). Seed confirmed
no Debug impl. Redaction test added.
W4 (core/auth-apikey-resources): Option B — drop entry.resources from
spec. External identities (token/fingerprint) grant scopes only;
resource-scoped ACLs are composition-internal (ADR-015/022). auth.md
corrected + limitation documented. Two tests confirm empty resources.
review-post-impl-fixes: all 4 verified, workspace green (326 tests,
0 failures, 0 clippy warnings). Review #004 status → resolved.
Graph: 34 tasks, 12 gens.
- PendingEntry stores parent_request_id (Call and Subscribe) and started flag
for abort-cascade tree indexing
- register_call/register_subscribe accept optional parent_request_id
- AbortCascade::cascade_abort walks the call tree by parent_request_id and
aborts descendants per AbortPolicy (AbortDependents: all; ContinueRunning:
unstarted only). Returns sorted list of aborted request IDs
- call.aborted for unknown request_id silently discarded (empty result)
- Composed child request_ids stay internal (not sent as call.requested)
- mark_started() tracks dispatch state for ContinueRunning decisions
- 20 unit tests covering AbortDependents/ContinueRunning, depth-3 tree,
unknown root, mixed Call/Subscribe, determinism
Create crates/alknet-call with Cargo.toml, lib.rs, and module skeletons
for the registry (spec, context, registration, env, discovery) and
protocol (wire, pending, connection, adapter, abort) subsystems. Add the
crate to the workspace members list. Depends on alknet-core (workspace
path), irpc (workspace dep), tokio, serde, serde_json, async-trait,
tracing, thiserror, uuid, and futures. Implements ProtocolHandler on
ALPN alknet/call per docs/architecture/crates/call.
