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feat(daemon): Subscribe command stream + CompleteCommand — the vendor loop closes

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The HCACK-4 contract, implemented end to end. For every YAML-declared
command the service registers a forwarding handler (new HostCommandRegistry
names()/spec() accessors): with a subscribed tool client the command is
queued onto the Subscribe stream (id + name + params via from_item) and the
host is answered S2F42 HCACK=4 immediately — never blocking the io thread or
the T3 window; with NO subscriber the command takes its declarative YAML ack
(the honest pre-daemon behaviour). Settled + documented in the proto: v1 is
a firehose with no buffering/replay. CompleteCommand correlates the pending
id (audit; unknown id => PARAMETER_INVALID). Side effects stay suppressed on
HCACK-4 (router applies them only on Accept), so the completion event the
TOOL fires is the host's real signal — exactly E30's intent.

Tests (daemon suite 101 -> 124 assertions): a real S2F41 dispatched through
the full default-handler router ON the io thread under run_async — HCACK 4
with subscriber + params on the stream, declarative Accept without,
CompleteCommand known/unknown, fallback restored after unsubscribe.

Interop (now 20 checks, all green): the complete conformant loop against
the secsgem-py reference host — S2F41 START -> S2F42 HCACK=4 -> tool
receives Command(name=START, id=1) -> CompleteCommand -> FireEvent -> host
receives S6F11.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Raphael Maenle
2026-06-10 20:27:18 +02:00
parent 1da56f973f
commit e6ee927900
6 changed files with 288 additions and 13 deletions
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include/secsgem/gem/store/host_commands.hpp
+15
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@@ -71,6 +71,21 @@ class HostCommandRegistry {
}
bool has(const std::string& rcmd) const { return by_rcmd_.count(rcmd) > 0; }
bool has_handler(const std::string& rcmd) const { return handlers_.count(rcmd) > 0; }
// Enumeration + spec lookup, so a front-end (e.g. the gRPC daemon) can
// attach behaviour to every declared command and fall back to the
// declarative ack when its tool client isn't connected.
std::vector<std::string> names() const {
std::vector<std::string> out;
out.reserve(by_rcmd_.size());
for (const auto& [rcmd, _] : by_rcmd_) out.push_back(rcmd);
return out;
}
std::optional<Spec> spec(const std::string& rcmd) const {
auto it = by_rcmd_.find(rcmd);
if (it == by_rcmd_.end()) return std::nullopt;
return it->second;
}
Result dispatch(const std::string& rcmd,
const std::vector<CommandParameter>& params) const {
auto it = by_rcmd_.find(rcmd);