Dario Gabriel LipicarandClaude Opus 5
b218f4c8e5
capability_module is the last legacy Qt Q_INVOKABLE provider, and it cannot
become an ordinary `interface: universal` module while the two things it does
have no C entry point: reading the token store, and pushing a token to an
ARBITRARY target. This adds both, plus the grant that gates them. Purely
additive — no existing symbol changes behaviour.
lp_token_keys() the module names THIS image's TokenManager
holds. NULL means REFUSED, never "empty" — a
granted call with no tokens answers "[]", and a
known-caller gate needs to tell those apart.
lp_inform_module_token_to() routes to LogosAPIClient::informModuleToken_module,
the 5-arg form. Note the existing
lp_inform_module_token is the WRONG DIRECTION
for this: it reaches a consumer path that
hardcodes requestObject("capability_module"),
i.e. core -> capability, not capability ->
target. That 5-arg method had no C entry point.
lp_grant_host_services() sets the in-image grant over the closed set
{token_registry, token_delivery}. Replaces
rather than merges; NULL/""/"[]" clears. An
unknown name is rejected wholesale and leaves
the existing grant untouched, so a typo can
never silently drop a service.
Why the gate is per-IMAGE, which looks like an odd choice until it doesn't:
the host binary and a module's cdylib each link their own copy of this library,
so they have separate process-global state. A gate "simplified" into the host
would be checked against state the calling image can never set, and would read
as ungranted forever. The grant therefore crosses the module-impl C ABI the
same way the auth token already does — hence the logos_module_grant_host_services
declaration added to logos_module_impl.h, whose generated body and host-side
call land in logos-cpp-sdk and logos-module-loader-qt respectively.
MINOR 2 -> 3; MAJOR unchanged, so the equal-MAJOR compatibility rule is
unaffected. 387/387 tests pass, including 6 new ones covering both gates
closed, both opened, clearing re-closing them, and the unknown-name rejection.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
logos-protocol
The Logos protocol layer: transports, token exchange, and the
language-neutral lp_* C ABI (cpp/logos_protocol.h) that every Logos
SDK builds on.
Extracted from logos-cpp-sdk so that non-C++ SDKs (Rust, …) consume the
same transports, capability/token flow and wire behavior through one stable,
versioned boundary instead of re-wrapping the C++/Qt SDK.
What lives here
- Public C ABI —
cpp/logos_protocol.h: consumer surface (lp_client_*,lp_invoke[_async],lp_subscribe, tokens,lp_get_methods), provider groundwork (lp_provider_*), the trust-root surface (lp_grant_host_servicesand the two functions it gates), and the protocol version (LOGOS_PROTOCOL_VERSION_*,lp_protocol_version(),lp_protocol_abi_major()). JSON-in-strings data model; bytes cross the boundary as{"_bytes":"<base64url>"}(lossless, NUL-safe). - Transports — plain TCP / TCP+TLS (Boost.Asio + OpenSSL + nlohmann,
Qt-free),
qt_local, in-memory mock, and Qt Remote Objects (qt_remote— the only Qt-bearing transport). - Consumer core —
LogosAPIClient/LogosAPIConsumerincluding the automaticcapability_module.requestModuletoken-fetch flow (behind the protocol boundary: every language gets it for free). - Provider-side plumbing —
ModuleProxy(auth gate the transports publish) and the abstractLogosProviderObjectinterface (logos_provider_interface.h). - Token manager, transport/registry factories, mode config (remote/local/mock), and the canonical QVariant↔JSON conversion used at the QRO boundary.
logos-cpp-sdk layers the typed C++ developer API (LogosAPI, module
context, code generator, provider base classes) on top of this repo.
Versioning
This repo carries the logos-protocol semver — the single number that governs Logos load/call compatibility. Two participants (modules, hosts, SDKs in any language) interoperate iff they share the same MAJOR. MINOR is additive/back-compatible; PATCH never affects compatibility. SDKs must re-expose the version of the protocol they linked (never mint their own).
Building
# Via workspace
ws build logos-protocol
# Standalone
nix build
# Tests
nix build .#tests
Layering invariant
logos-protocol depends only on Qt / Boost / OpenSSL / nlohmann_json — it
must NEVER depend on logos-cpp-sdk, logos-qt-sdk, logos-rust-sdk, liblogos
or logos-lidl. Everything points inward.