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go-grpc
gRPC services in Go beyond the basics: proto design, status codes and error details, interceptors, deadlines, streaming, health checks, and graceful shutdown. Use when: "gRPC service", "proto design", "gRPC error handling", "interceptor", "gRPC streaming", "gRPC deadline", "grpc
Ringkasan
gRPC services in Go beyond the basics: proto design, status codes and error details, interceptors, deadlines, streaming, health checks, and graceful shutdown. Use when: "gRPC service", "proto design", "gRPC error handling", "interceptor", "gRPC streaming", "gRPC deadline", "grpc health check", "gRPC status codes". Not for: REST handlers (go-api-design), protobuf-agnostic layering (go-architecture-review), TLS hardening (go-security-audit).
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Dokumentasi sumber, bukan instruksi untuk situs ini. Periksa izin sebelum menjalankan perintah.
Go gRPC Services
gRPC's contract-first model only pays off if the contract is treated as an API: versioned packages, deliberate error codes, deadlines everywhere, and interceptors for everything cross-cutting.
1. Proto Design Rules
syntax = "proto3";
package payment.v1; // version IN the package
option go_package = "github.com/acme/payment-service/gen/payment/v1;paymentv1";
service PaymentService {
rpc CreatePayment(CreatePaymentRequest) returns (CreatePaymentResponse);
}
message CreatePaymentRequest { // one request/response pair
string order_id = 1; // per RPC, always — even if
int64 amount_cents = 2; // empty today
}
message CreatePaymentResponse {
Payment payment = 1;
}
- Version in the package (
payment.v1); breaking change =payment.v2. - Never reuse or renumber field tags;
reserved 3, 7;deleted ones. - Dedicated Request/Response messages per RPC — adding a field later is free; changing a shared message breaks every RPC using it.
- Generate with buf or a pinned protoc in
make generate; commit generated code so builds don't depend on toolchain drift.
2. Errors: Status Codes, Not Strings
Return status.Error, mapping domain errors in ONE place:
func (s *Server) CreatePayment(ctx context.Context, req *pb.CreatePaymentRequest) (*pb.CreatePaymentResponse, error) {
p, err := s.svc.Create(ctx, toDomain(req))
if err != nil {
return nil, toStatus(err)
}
return &pb.CreatePaymentResponse{Payment: fromDomain(p)}, nil
}
func toStatus(err error) error {
switch {
case errors.Is(err, domain.ErrNotFound):
return status.Error(codes.NotFound, "payment not found")
case errors.Is(err, domain.ErrDuplicate):
return status.Error(codes.AlreadyExists, "payment already exists")
case errors.Is(err, context.DeadlineExceeded):
return status.Error(codes.DeadlineExceeded, "timed out")
default:
return status.Error(codes.Internal, "internal error") // no details leak
}
}
Code semantics that matter: InvalidArgument (bad request regardless
of state), FailedPrecondition (bad state), NotFound, AlreadyExists,
Unauthenticated vs PermissionDenied, Unavailable (retryable),
Internal (bug). Clients read codes with status.FromError(err) —
never parse messages.
3. Deadlines Are Mandatory
// Client — every call gets a deadline
ctx, cancel := context.WithTimeout(ctx, 2*time.Second)
defer cancel()
resp, err := client.CreatePayment(ctx, req)
// Server — check before expensive work
if err := ctx.Err(); err != nil {
return nil, status.FromContextError(err).Err()
}
The server inherits the client's deadline through the context. Pass
ctx into every downstream call (DB, other RPCs) so cancellation
propagates end to end.
4. Interceptors for Cross-Cutting Concerns
Handlers stay business-only; recovery, auth, logging, metrics live in interceptors:
srv := grpc.NewServer(
grpc.ChainUnaryInterceptor(
recoveryInterceptor, // outermost: panic → codes.Internal
loggingInterceptor,
authInterceptor,
),
)
func loggingInterceptor(ctx context.Context, req any,
info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (any, error) {
start := time.Now()
resp, err := handler(ctx, req)
slog.InfoContext(ctx, "rpc",
slog.String("method", info.FullMethod),
slog.Duration("duration", time.Since(start)),
slog.String("code", status.Code(err).String()),
)
return resp, err
}
Order matters: recovery first (outermost), then observability, then
auth. Streaming RPCs need the parallel StreamInterceptor versions.
5. Streaming
- Server streaming for large result sets:
stream.Sendin a loop, return non-nil error to abort with a status. - Client/bidi streaming only when the protocol truly needs it — each open stream holds a goroutine and flow-control state.
- Always terminate on
ctx.Done():
func (s *Server) WatchPayments(req *pb.WatchRequest, stream pb.PaymentService_WatchPaymentsServer) error {
for {
select {
case <-stream.Context().Done():
return status.FromContextError(stream.Context().Err()).Err()
case ev := <-s.events:
if err := stream.Send(toProto(ev)); err != nil {
return err
}
}
}
}
6. Production Server Setup
lis, err := net.Listen("tcp", cfg.Addr)
if err != nil {
return fmt.Errorf("listen: %w", err)
}
srv := grpc.NewServer(grpc.ChainUnaryInterceptor(...))
pb.RegisterPaymentServiceServer(srv, server)
healthSrv := health.NewServer() // grpc.health.v1 — load balancers need it
healthpb.RegisterHealthServer(srv, healthSrv)
reflection.Register(srv) // grpcurl/debugging; gate on non-prod if policy requires
go func() {
<-ctx.Done()
stopped := make(chan struct{})
go func() { srv.GracefulStop(); close(stopped) }()
select {
case <-stopped: // in-flight RPCs finished
case <-time.After(10 * time.Second):
srv.Stop() // force after grace period
}
}()
return srv.Serve(lis)
Verification Checklist
- Proto packages versioned (
*.v1); no tag reuse;reservedfor removals - Dedicated Request/Response message per RPC
- Generated code produced by a pinned tool (buf/protoc) and committed
- All handler errors are
status.Errorwith semantically correct codes codes.Internalresponses never leak internal error text- Every client call has a deadline; ctx propagated through all layers
- Recovery, logging, auth implemented as chained interceptors (unary + stream)
- Streams select on
stream.Context().Done() - Health service registered; graceful stop with forced fallback
grpcurlsmoke test (or generated client test) passes against the running server
Metadata berkas
name: go-grpc description: > gRPC services in Go beyond the basics: proto design, status codes and error details, interceptors, deadlines, streaming, health checks, and graceful shutdown. Use when: "gRPC service", "proto design", "gRPC error handling", "interceptor", "gRPC streaming", "gRPC deadline", "grpc health check", "gRPC status codes". Not for: REST handlers (go-api-design), protobuf-agnostic layering (go-architecture-review), TLS hardening (go-security-audit). user-invocable: true license: MIT compatibility: Designed for Claude Code or similar AI coding agents working on Go projects. Requires the Go toolchain. Requires protoc or buf for code generation. allowed-tools: Read Edit Write Glob Grep Bash(go:*) Bash(gofmt:*) Bash(protoc:*) Bash(buf:*) metadata: author: eduardo-sl version: "1.1.1"
Lihat teks asli
---
name: go-grpc
description: >
gRPC services in Go beyond the basics: proto design, status codes and
error details, interceptors, deadlines, streaming, health checks, and
graceful shutdown. Use when: "gRPC service", "proto design", "gRPC error
handling", "interceptor", "gRPC streaming", "gRPC deadline", "grpc health
check", "gRPC status codes".
Not for: REST handlers (go-api-design), protobuf-agnostic layering
(go-architecture-review), TLS hardening (go-security-audit).
user-invocable: true
license: MIT
compatibility: Designed for Claude Code or similar AI coding agents working on Go projects. Requires the Go toolchain. Requires protoc or buf for code generation.
allowed-tools: Read Edit Write Glob Grep Bash(go:*) Bash(gofmt:*) Bash(protoc:*) Bash(buf:*)
metadata:
author: eduardo-sl
version: "1.1.1"
---
# Go gRPC Services
gRPC's contract-first model only pays off if the contract is treated as
an API: versioned packages, deliberate error codes, deadlines
everywhere, and interceptors for everything cross-cutting.
## 1. Proto Design Rules
```protobuf
syntax = "proto3";
package payment.v1; // version IN the package
option go_package = "github.com/acme/payment-service/gen/payment/v1;paymentv1";
service PaymentService {
rpc CreatePayment(CreatePaymentRequest) returns (CreatePaymentResponse);
}
message CreatePaymentRequest { // one request/response pair
string order_id = 1; // per RPC, always — even if
int64 amount_cents = 2; // empty today
}
message CreatePaymentResponse {
Payment payment = 1;
}
```
- Version in the package (`payment.v1`); breaking change = `payment.v2`.
- Never reuse or renumber field tags; `reserved 3, 7;` deleted ones.
- Dedicated Request/Response messages per RPC — adding a field later is
free; changing a shared message breaks every RPC using it.
- Generate with buf or a pinned protoc in `make generate`; commit
generated code so builds don't depend on toolchain drift.
## 2. Errors: Status Codes, Not Strings
Return `status.Error`, mapping domain errors in ONE place:
```go
func (s *Server) CreatePayment(ctx context.Context, req *pb.CreatePaymentRequest) (*pb.CreatePaymentResponse, error) {
p, err := s.svc.Create(ctx, toDomain(req))
if err != nil {
return nil, toStatus(err)
}
return &pb.CreatePaymentResponse{Payment: fromDomain(p)}, nil
}
func toStatus(err error) error {
switch {
case errors.Is(err, domain.ErrNotFound):
return status.Error(codes.NotFound, "payment not found")
case errors.Is(err, domain.ErrDuplicate):
return status.Error(codes.AlreadyExists, "payment already exists")
case errors.Is(err, context.DeadlineExceeded):
return status.Error(codes.DeadlineExceeded, "timed out")
default:
return status.Error(codes.Internal, "internal error") // no details leak
}
}
```
Code semantics that matter: `InvalidArgument` (bad request regardless
of state), `FailedPrecondition` (bad state), `NotFound`, `AlreadyExists`,
`Unauthenticated` vs `PermissionDenied`, `Unavailable` (retryable),
`Internal` (bug). Clients read codes with `status.FromError(err)` —
never parse messages.
## 3. Deadlines Are Mandatory
```go
// Client — every call gets a deadline
ctx, cancel := context.WithTimeout(ctx, 2*time.Second)
defer cancel()
resp, err := client.CreatePayment(ctx, req)
// Server — check before expensive work
if err := ctx.Err(); err != nil {
return nil, status.FromContextError(err).Err()
}
```
The server inherits the client's deadline through the context. Pass
`ctx` into every downstream call (DB, other RPCs) so cancellation
propagates end to end.
## 4. Interceptors for Cross-Cutting Concerns
Handlers stay business-only; recovery, auth, logging, metrics live in
interceptors:
```go
srv := grpc.NewServer(
grpc.ChainUnaryInterceptor(
recoveryInterceptor, // outermost: panic → codes.Internal
loggingInterceptor,
authInterceptor,
),
)
func loggingInterceptor(ctx context.Context, req any,
info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (any, error) {
start := time.Now()
resp, err := handler(ctx, req)
slog.InfoContext(ctx, "rpc",
slog.String("method", info.FullMethod),
slog.Duration("duration", time.Since(start)),
slog.String("code", status.Code(err).String()),
)
return resp, err
}
```
Order matters: recovery first (outermost), then observability, then
auth. Streaming RPCs need the parallel `StreamInterceptor` versions.
## 5. Streaming
- **Server streaming** for large result sets: `stream.Send` in a loop,
return non-nil error to abort with a status.
- **Client/bidi streaming** only when the protocol truly needs it —
each open stream holds a goroutine and flow-control state.
- Always terminate on `ctx.Done()`:
```go
func (s *Server) WatchPayments(req *pb.WatchRequest, stream pb.PaymentService_WatchPaymentsServer) error {
for {
select {
case <-stream.Context().Done():
return status.FromContextError(stream.Context().Err()).Err()
case ev := <-s.events:
if err := stream.Send(toProto(ev)); err != nil {
return err
}
}
}
}
```
## 6. Production Server Setup
```go
lis, err := net.Listen("tcp", cfg.Addr)
if err != nil {
return fmt.Errorf("listen: %w", err)
}
srv := grpc.NewServer(grpc.ChainUnaryInterceptor(...))
pb.RegisterPaymentServiceServer(srv, server)
healthSrv := health.NewServer() // grpc.health.v1 — load balancers need it
healthpb.RegisterHealthServer(srv, healthSrv)
reflection.Register(srv) // grpcurl/debugging; gate on non-prod if policy requires
go func() {
<-ctx.Done()
stopped := make(chan struct{})
go func() { srv.GracefulStop(); close(stopped) }()
select {
case <-stopped: // in-flight RPCs finished
case <-time.After(10 * time.Second):
srv.Stop() // force after grace period
}
}()
return srv.Serve(lis)
```
## Verification Checklist
1. Proto packages versioned (`*.v1`); no tag reuse; `reserved` for removals
2. Dedicated Request/Response message per RPC
3. Generated code produced by a pinned tool (buf/protoc) and committed
4. All handler errors are `status.Error` with semantically correct codes
5. `codes.Internal` responses never leak internal error text
6. Every client call has a deadline; ctx propagated through all layers
7. Recovery, logging, auth implemented as chained interceptors (unary + stream)
8. Streams select on `stream.Context().Done()`
9. Health service registered; graceful stop with forced fallback
10. `grpcurl` smoke test (or generated client test) passes against the running server
Tinjau sumber
Harga dan biaya penggunaan
- Dapatkan skill
- Harga belum dikonfirmasi
- Jalankan
- Persyaratan belum dikonfirmasi. Periksa biaya agen, API, dan layanan di sumbernya.
- Lisensi
- MIT
- Harga belum dikonfirmasi
- Harga belum dikonfirmasi. Tautan sumber dan instalasi yang ada tetap tersedia.
Gratis diperoleh bukan berarti gratis dijalankan. Harga bukan penilaian keamanan. Kirim informasi harga →
Sumber skill tercatat
Jalur instruksi telah dicatat. Ini bukan uji eksekusi, jaminan keamanan, atau sertifikasi kompatibilitas.
Tinjau sebelum memasang: Hindari pemasangan otomatis
Lisensi: MIT
- Dependency or permission surface needs review
- Permission surface may require sandboxing
- Financial research output is not financial advice; require human review before any live investment decision
- Persetujuan tinjauan AI belum ada
- Financial research output is not financial advice; require human review before any live investment decision.
- Quality score needs review
- Permission surface needs review: secrets or environment access, shell or command execution
- GitHub adoption: 71 GitHub stars
- Stars/forks activity: 71 stars, 9 forks; issue activity unavailable in current metadata
- Dependency/runtime risk: command execution surface, credential or environment access
- Permission surface: secrets or environment access, shell or command execution
- Review status: AI review approval is missing
Daftar alat adalah petunjuk metadata, bukan kompatibilitas teruji. Prompt adalah saran.
Mulai dengan tugas kecil
- 1Baca sumber dan pastikan masukan, keluaran, dependensi, serta izin.
- 2Minta rencana dari agent. Setujui pengaturan dan biaya sebelum uji terisolasi.
- 3Periksa hasil dan berkas yang berubah. Laporkan hanya yang dijalankan dan simpan revisi sumber.
Periksa dependensi, kunci API, dan biaya layanan pihak ketiga pada sumber. Repositori publik tidak berarti semua layanan gratis.
Sumber dan catatan penggunaan
Metadata dan tinjauan bersifat saran. Popularitas, penemuan sumber, dan keberhasilan eksekusi adalah fakta berbeda.
- Repositori sumber
- eduardo-sl/go-agent-skills
- Lisensi
- MIT
- Versi
- 1.0.0
- Push GitHub terakhir
- 18 Agu 2026
- Direktori diperbarui
- 8 Sep 2026
- Jalur instruksi
- skills/(architecture)/go-grpc/SKILL.md @ 50133c33a386
Versi dilaporkan dalam metadata direktori; periksa rilis sumber.
Kualitas
57/100
Menjanjikan
Kepercayaan
59/100
Do not auto-install
Audit
70/100
Perlu ditinjau
- Dependency or permission surface needs review
- Permission surface may require sandboxing
- Financial research output is not financial advice; require human review before any live investment decision
- Persetujuan tinjauan AI belum ada
- Financial research output is not financial advice; require human review before any live investment decision.
- Quality score needs review
- Permission surface needs review: secrets or environment access, shell or command execution
- GitHub adoption: 71 GitHub stars
- Stars/forks activity: 71 stars, 9 forks; issue activity unavailable in current metadata
- Dependency/runtime risk: command execution surface, credential or environment access
- Permission surface: secrets or environment access, shell or command execution
- Review status: AI review approval is missing
- Verified installs
- —
- Hasil
- —
Menyalin bukan memasang. Jumlah instalasi memerlukan laporan berhasil dan bukan jaminan kualitas menyeluruh.
Akses agent
API Registry menyediakan sinyal keputusan, kepercayaan, audit, use case, dan pemasangan tanpa mengikis UI.
Detail lainnya
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"label": "No agent outcome data yet"
},
"auto_install": {
"allowed": false,
"sandbox_required": true,
"reason": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
},
"best_for": [
"security",
"agent-skill"
],
"known_risks": [
"AI review approval is missing",
"Financial research output is not financial advice; require human review before any live investment decision.",
"Quality score needs review",
"Permission surface needs review: secrets or environment access, shell or command execution",
"GitHub adoption: 71 GitHub stars",
"Stars/forks activity: 71 stars, 9 forks; issue activity unavailable in current metadata",
"Dependency/runtime risk: command execution surface, credential or environment access",
"Permission surface: secrets or environment access, shell or command execution"
]
},
"agent_proven": {
"version": "agent-proven-v1",
"score": 0,
"tier": "unproven",
"label": "Needs first agent run",
"summary": "No agent outcome reports yet. Use Resolve, run one narrow sandbox task, then report the result.",
"metrics": {
"totalOutcomes": 0,
"successfulOutcomes": 0,
"failedOutcomes": 0,
"installAttempts": 0,
"installSuccessRate": null,
"successRate": null,
"recentSuccessRate": null,
"recentFailureRate": null,
"riskBlocked": 0,
"setupRequired": 0,
"notRelevant": 0,
"avgOutputQuality": null,
"avgTimeToUsefulMs": null,
"productionOutcomes": 0,
"humanReviewRequired": 0,
"uniqueAgents": 0,
"lastOutcomeAt": null
},
"signals": [],
"penalties": [
"No real agent outcome evidence yet"
]
},
"audit": {
"score": 70,
"risk_level": "needs_review",
"risk_label": "Needs review",
"warnings": [
"Dependency or permission surface needs review",
"Permission surface may require sandboxing",
"Financial research output is not financial advice; require human review before any live investment decision",
"AI review approval is missing",
"Financial research output is not financial advice; require human review before any live investment decision.",
"Quality score needs review",
"Permission surface needs review: secrets or environment access, shell or command execution",
"GitHub adoption: 71 GitHub stars"
]
},
"safety_gate": {
"tier": "blocked",
"label": "Blocked for auto-install",
"auto_install_policy": "block",
"auto_install_allowed": false,
"human_review_required": true,
"blocked": true,
"recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first."
},
"quality": {
"score": 57,
"label": "Promising"
},
"supply": {
"track": "Coding and developer agents",
"scenario": "Coding agents",
"maintenance": "2mo since push",
"risk": "Needs review"
},
"alternative_skills": [],
"do_not_use_when": [
"teams that need a vendor-supported SLA",
"high-compliance environments without internal security review",
"No major risk signals from current metadata",
"High-risk permission hints: Shell or command execution, Secrets or environment access",
"Dependency or permission surface needs review",
"Permission surface may require sandboxing",
"Financial research output is not financial advice; require human review before any live investment decision",
"AI review approval is missing"
],
"agent_contract": {
"task_input": "Use go-grpc in an agent workflow",
"recommended_action": "Do not auto-install. Inspect the source, dependencies, and permission surface first.",
"install_policy": "block",
"minimum_review_before_use": [
"Trust: 67/100 Manual review",
"Audit: 70/100 Needs review",
"Safety: 34/100 Avoid automatic install",
"Review repository, license, install command, and permission surface before production use."
],
"expected_agent_output": {
"selected_skill": "eduardo-sl-go-grpc (go-grpc)",
"install_command": "npx skills add eduardo-sl/go-agent-skills --skill go-grpc",
"risk_summary": "Needs review; Blocked for auto-install; Review before production",
"verification_result": "Report the smallest successful task, files touched, warnings, and any missing setup."
}
},
"outcome_feedback": {
"endpoint": "https://www.openagentskill.com/api/agent/outcome",
"method": "POST",
"requires_resolve_event_id": true,
"event_id_source": "Use install_receipt.outcome_feedback.event_id or feedback.event_id returned by /api/agent/resolve for the current task.",
"expected_outcomes": [
"success",
"failed",
"not_relevant",
"blocked_by_risk",
"setup_required"
],
"payload_template": {
"event_id": "<install_receipt.outcome_feedback.event_id or feedback.event_id from /api/agent/resolve>",
"skill_slug": "eduardo-sl-go-grpc",
"task": "Use go-grpc in an agent workflow",
"agent": "codex",
"outcome": "success",
"install_used": true,
"risk_blocked": false,
"setup_required": false,
"task_success": true,
"output_quality": 4,
"error_type": null,
"human_review_required": false,
"workspace": "sandbox",
"time_to_useful_ms": 120000,
"notes": "Report the smallest successful task, setup friction, files touched, and risk notes."
}
},
"endpoints": {
"web": "https://www.openagentskill.com/skills/eduardo-sl-go-grpc",
"api": "https://www.openagentskill.com/api/agent/skills/eduardo-sl-go-grpc",
"audit": "https://www.openagentskill.com/skills/eduardo-sl-go-grpc/audit",
"eval": "https://www.openagentskill.com/api/agent/evals?slug=eduardo-sl-go-grpc&task=Use%20go-grpc%20in%20an%20agent%20workflow&max_risk=medium",
"resolve": "https://www.openagentskill.com/api/agent/resolve?task=Use%20go-grpc%20in%20an%20agent%20workflow&agent=codex&max_risk=medium",
"receipt": "https://www.openagentskill.com/api/agent/receipt?task=Use%20go-grpc%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text",
"install": "https://www.openagentskill.com/api/skills/eduardo-sl-go-grpc/install",
"manifest": "https://www.openagentskill.com/api/registry/manifest/eduardo-sl-go-grpc"
}
}Untuk kreator
Sumber listing
Diindeks Registry
Listing ini diindeks dari sumber publik dan belum ditandai resmi hingga klaim pemelihara disetujui.
- Kreator
- eduardo-sl
- Diindeks oleh
- Indeks komunitas OpenAgentSkill
Atribusi menautkan ke repositori publik atau profil kreator. Kreator dapat mengklaim listing untuk memperbarui sinyal kepemilikan.
Klaim skill iniKlaim pemilik
Klaim listing skill ini
Listing Diindeks Registry ini dikaitkan dengan eduardo-sl, tetapi belum ditandai resmi. Klaim untuk menambahkan sinyal pemilik terverifikasi dan membuat pembaruan peluncuran, pemasangan, serta audit berikutnya lebih tepercaya.
Kit berbagi
Kit backlink kreator
Tambahkan badge bukti ke README Anda
Tampilkan listing kanonis, sinyal kepercayaan dan audit saat ini, serta bukti Agent-Proven nyata di tempat pengembang mengevaluasi repositori.
[](https://www.openagentskill.com/skills/eduardo-sl-go-grpc?ref=github&utm_source=github&utm_medium=referral&utm_campaign=creator_badge)
[](https://www.openagentskill.com/skills/eduardo-sl-go-grpc?ref=github&utm_source=github&utm_medium=referral&utm_campaign=creator_badge)
[](https://www.openagentskill.com/skills/eduardo-sl-go-grpc/audit)
[](https://www.openagentskill.com/skills/eduardo-sl-go-grpc?ref=github&utm_source=github&utm_medium=referral&utm_campaign=creator_badge)Sinyal komunitas
Bagikan apakah skill ini bermanfaat untuk alur kerja Agent Anda. Masukan gabungan meningkatkan peringkat dari waktu ke waktu.
