feat(helper): start gRPC server when API.EnableGRPC is true by kevinelliott · Pull Request #21 · kevinelliott/agentmanager

kevinelliott · 2026-04-21T09:00:31Z

Summary

The systray helper previously only started the REST API when API.EnableREST was set; the matching API.EnableGRPC config flag was silently ignored. This PR wires the gRPC server (already hardened in v1.1.0 with keepalive, message-size limits, and panic-recovery interceptors) into the helper startup/shutdown path, mirroring the REST pattern.

Default remains OFF — no behavior change for existing users.
Port defaults to 50051 (per pkg/config/config.go).
Both REST and gRPC can run concurrently — independent if-blocks in Run() on distinct ports.

Changes

internal/systray/systray.go:
- New grpcServer *grpcapi.Server field (internal grpc pkg aliased as grpcapi to avoid shadowing google.golang.org/grpc).
- New startGRPCServer() mirroring startRESTServer(), using WithVersion(a.version) and WithStartTime(a.startTime).
- Run() starts the gRPC server when a.config.API.EnableGRPC is true.
- Shutdown path runs GracefulStop bounded by a 2s timeout, falling back to a hard ForceStop so a wedged streaming RPC cannot block helper exit.
pkg/api/grpc/server.go:
- Add ForceStop() for the hard-stop fallback used by the systray shutdown path.
internal/systray/systray_test.go:
- New TestStartGRPCServerPopulatesField verifies startGRPCServer() populates App.grpcServer and the listener binds (ephemeral :0 port for test isolation).
CHANGELOG.md — [Unreleased] > Added entry.

Test plan

go build ./... clean on darwin
go test ./internal/systray/... ./pkg/api/grpc/... ./pkg/api/rest/... -race -count=1 green
/tmp/gcil-install/golangci-lint run --timeout=5m clean
Manual smoke: set api.enable_grpc: true in config, launch helper, run grpcurl -plaintext localhost:50051 list (reflection is registered by the server)
Manual smoke: leave default config, launch helper, confirm nothing binds to 50051 (default OFF preserved)

Diff stat: 4 files changed, 109 insertions(+).

Co-Authored-By: Claude Opus 4.7 (1M context) noreply@anthropic.com

+		s.grpcServer.Stop()
+	}
+	if s.listener != nil {
+		s.listener.Close()


Copilot

Pull request overview

This PR wires the existing gRPC API server into the systray helper lifecycle so API.EnableGRPC behaves as expected (start on run, stop on exit), mirroring the existing REST pattern.

Changes:

Start the gRPC server from the systray helper when API.EnableGRPC is enabled, and shut it down on helper exit with a graceful-then-force fallback.
Add ForceStop() to the gRPC server implementation to support hard-stop shutdown semantics.
Add a systray-focused unit test for startGRPCServer() and document the behavior in the changelog.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
`internal/systray/systray.go`	Starts gRPC server when enabled; adds bounded graceful shutdown with hard-stop fallback.
`pkg/api/grpc/server.go`	Adds `ForceStop()` to allow immediate stop/cleanup of gRPC server resources.
`internal/systray/systray_test.go`	Adds a unit test validating `startGRPCServer()` populates the app field and binds a listener.
`CHANGELOG.md`	Notes the new systray behavior under `[Unreleased]`.

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Copilot · 2026-04-21T09:06:13Z

+// ForceStop immediately stops the gRPC server without waiting for in-flight
+// RPCs to complete. Intended as a fallback when a bounded GracefulStop does
+// not return in time (e.g. a wedged streaming handler during helper exit).
+func (s *Server) ForceStop() {
+	if s.grpcServer != nil {
+		s.grpcServer.Stop()
+	}


Now that ForceStop() exists, consider updating Stop(ctx) to actually honor the provided context (e.g., run GracefulStop in a goroutine and invoke ForceStop when ctx.Done() fires). As-is, Stop(ctx) ignores ctx and can block indefinitely, which forces callers (like systray shutdown) to implement their own timeout + fallback logic and makes the API contract misleading compared to REST Stop(ctx).

Copilot · 2026-04-21T09:06:14Z

+	// Give the goroutine inside Start() a moment to register the listener,
+	// then verify it has a bound address (proves Serve is actually running).
+	time.Sleep(20 * time.Millisecond)
+	if addr := a.grpcServer.Address(); addr == "" {
+		t.Error("grpc server Address() should be non-empty after Start()")


This test uses a fixed sleep to wait for the server goroutine to start, which can be flaky under load/slow CI. Prefer polling Address() with a short deadline (or exposing a readiness signal from Start) so the test deterministically waits until the listener is bound.

Suggested change

// Give the goroutine inside Start() a moment to register the listener,

// then verify it has a bound address (proves Serve is actually running).

time.Sleep(20 * time.Millisecond)

if addr := a.grpcServer.Address(); addr == "" {

t.Error("grpc server Address() should be non-empty after Start()")

// Poll until the listener is bound instead of relying on a fixed sleep,

// which can be flaky under load or in slow CI environments.

deadline := time.Now().Add(500 * time.Millisecond)

for {

if addr := a.grpcServer.Address(); addr != "" {

break

}

if time.Now().After(deadline) {

t.Error("grpc server Address() should be non-empty after Start()")

break

}

time.Sleep(10 * time.Millisecond)

Copilot · 2026-04-21T09:06:14Z

+// TestStartGRPCServerPopulatesField verifies that startGRPCServer wires up
+// the gRPC server on App when invoked (which is what Run() does when
+// API.EnableGRPC is true). Uses port :0 to avoid binding to a fixed port.
+// Also confirms that the server is nil if startGRPCServer is never called,
+// matching the EnableGRPC=false default path.


The doc comment says this also confirms the EnableGRPC=false default path, but the test config explicitly sets EnableGRPC=true and doesn't exercise Run()'s branching. Consider rewording to just describe what the test actually asserts (grpcServer is nil before calling startGRPCServer, and non-nil afterward).

Suggested change

// TestStartGRPCServerPopulatesField verifies that startGRPCServer wires up

// the gRPC server on App when invoked (which is what Run() does when

// API.EnableGRPC is true). Uses port :0 to avoid binding to a fixed port.

// Also confirms that the server is nil if startGRPCServer is never called,

// matching the EnableGRPC=false default path.

// TestStartGRPCServerPopulatesField verifies that grpcServer is nil before

// startGRPCServer is called and populated afterward. Uses port :0 to avoid

// binding to a fixed port.

The systray helper previously only started the REST API (when API.EnableREST was set); the matching API.EnableGRPC config flag was silently ignored. Mirror the REST startup pattern so operators who enable gRPC actually get a listener. Default remains OFF (no behavior change for existing users). Port defaults to 50051. REST and gRPC can run concurrently. - internal/systray: new grpcServer field, startGRPCServer(), Run() branch, and bounded-GracefulStop-with-ForceStop-fallback on exit. - pkg/api/grpc: add ForceStop() for the hard-stop fallback path used during helper shutdown when a streaming RPC wedges. - test: assert startGRPCServer populates App.grpcServer and binds. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Promote the Unreleased section to 1.2.0 and capture the UX / operability work landed since v1.1.0: - #20 install/update progress streaming with -v - #21 gRPC server wire-up in helper - #22, #26 test coverage (cli/output 0→82%, systray 0.2→3.2%) - #24 RefreshOnStart field removal - #27 bubbles v0.21 -> v1.0 - #28 go:embed baseline catalog (fresh `go install` works offline) - #29 pkg/logging slog wrapper wired into main and grpc recovery Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Copilot AI review requested due to automatic review settings April 21, 2026 09:00

Copilot started reviewing on behalf of kevinelliott April 21, 2026 09:01 View session

github-advanced-security AI found potential problems Apr 21, 2026

View reviewed changes

Comment thread pkg/api/grpc/server.go

s.grpcServer.Stop()

}

if s.listener != nil {

s.listener.Close()

Copilot AI reviewed Apr 21, 2026

View reviewed changes

kevinelliott force-pushed the feat/helper-enable-grpc branch from c5c6642 to 74222a4 Compare April 21, 2026 09:17

kevinelliott merged commit 42350ad into main Apr 21, 2026
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feat(helper): start gRPC server when API.EnableGRPC is true#21

feat(helper): start gRPC server when API.EnableGRPC is true#21
kevinelliott merged 1 commit intomainfrom
feat/helper-enable-grpc

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kevinelliott commented Apr 21, 2026

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