{"slug":"managedcode-grpc","name":"grpc","description":"Build or review gRPC services and clients in .NET. USE FOR: ASP.NET Core gRPC, protobuf contracts, unary or streaming RPC, gRPC client factory, interceptors, deadlines, cancellation, channel reuse, backend service integration. DO NOT USE FOR: broad browser-facing APIs without gRPC-Web tradeoff review, SignalR realtime hubs, plain REST APIs. INVOKES: dotnet build/test and focused service or client smoke checks when code changes.","long_description":"---\nname: grpc\ndescription: \"Build or review gRPC services and clients in .NET. USE FOR: ASP.NET Core gRPC, protobuf contracts, unary or streaming RPC, gRPC client factory, interceptors, deadlines, cancellation, channel reuse, backend service integration. DO NOT USE FOR: broad browser-facing APIs without gRPC-Web tradeoff review, SignalR realtime hubs, plain REST APIs. INVOKES: dotnet build/test and focused service or client smoke checks when code changes.\"\ncompatibility: \"Requires ASP.NET Core gRPC or gRPC client projects.\"\n---\n\n# gRPC for .NET\n\n## Trigger On\n\n- building backend-to-backend RPC services or clients\n- adding protobuf contracts, streaming calls, or interceptors\n- deciding between gRPC, HTTP APIs, and SignalR\n- optimizing gRPC performance, deadlines, cancellation, or connection reuse\n- integrating service-to-service communication in microservices\n\n## Do Not Use For\n\n- public browser-first APIs unless gRPC-Web limitations are explicitly acceptable\n- SignalR hub design, realtime UI fan-out, or websocket-style client collaboration\n- generic ASP.NET Core minimal APIs or REST controllers with no protobuf/RPC requirement\n- non-.NET gRPC work unless the user asks for cross-stack contract guidance\n\n## Load References\n\n- [references/patterns.md](references/patterns.md) for proto design, streaming implementations, interceptors, health checks, load balancing, and client factory setup.\n- [references/anti-patterns.md](references/anti-patterns.md) for common channel, deadline, streaming, message-size, and exception-handling mistakes.\n\n## Workflow\n\n1. Validate the architecture fit before touching code.\n   - prefer gRPC for backend RPC, strong contracts, low-latency calls, or streaming\n   - prefer REST or minimal APIs for broad browser compatibility and loosely coupled public APIs\n   - prefer SignalR for browser/client realtime fan-out and UI collaboration\n2. Treat `.proto` files as the source of truth.\n   - keep package names, `csharp_namespace`, service names, and versioning deliberate\n   - reserve removed field numbers and avoid reusing tags\n   - use wrapper types or explicit messages when optionality matters\n3. Choose the RPC shape from the interaction model.\n   - unary for request/response\n   - server streaming for large or progressive result sets\n   - client streaming for uploads or batches\n   - bidirectional streaming for coordinated two-way flows\n4. Wire server and client behavior together.\n   - register services with `AddGrpc`\n   - use `AddGrpcClient` or long-lived `GrpcChannel` reuse\n   - set deadlines and propagate cancellation\n   - convert domain failures to appropriate `RpcException` status codes\n5. Add observability and resilience where the boundary justifies it.\n   - logging or exception interceptors\n   - OpenTelemetry traces and status-code metrics\n   - retry policy only for safe idempotent calls\n6. Validate with the repo's normal build and tests, plus a focused smoke call when runnable.\n\n## Current Upstream Notes\n\n- `dotnet/aspnetcore` `v10.0.11` is servicing and does not change the gRPC programming model. Keep guidance focused on proto compatibility, streaming shape, deadlines, cancellation, channel reuse, and smoke calls.\n- The August 2026 ASP.NET Core overview still treats gRPC as a contract-first RPC option. After package servicing updates, regenerate protobuf outputs only when inputs or generator packages actually changed; do not churn generated files as a proxy for validation.\n\n```mermaid\nflowchart LR\n  A[\"RPC requirement\"] --> B[\"proto contract\"]\n  B --> C[\"server implementation\"]\n  B --> D[\"client factory or channel\"]\n  C --> E[\"deadlines / cancellation / status codes\"]\n  D --> E\n  E --> F[\"build, tests, smoke call\"]\n```\n\n## Examples\n\nUse client factory for normal app integration:\n\n```csharp\nbuilder.Services.AddGrpcClient<Greeter.GreeterClient>(options =>\n{\n    options.Address = new Uri(\"https://localhost:5001\");\n});\n```\n\nAlways set a deadline and pass cancellation:\n\n```csharp\nvar response = await client.SayHelloAsync(\n    new HelloRequest { Name = name },\n    deadline: DateTime.UtcNow.AddSeconds(5),\n    cancellationToken: cancellationToken);\n```\n\nFor streaming, check cancellation inside the read/write loop and keep message sizes bounded. Load [references/patterns.md](references/patterns.md) before writing detailed streaming code.\n\n## Anti-Patterns\n\n- creating a new `GrpcChannel` per call\n- omitting deadlines and relying only on client-side cancellation\n- ignoring `ServerCallContext.CancellationToken` in streaming handlers\n- sending large single messages instead of chunking or streaming\n- using gRPC as the default public browser API\n- swallowing exceptions inside interceptors\n- retrying non-idempotent calls without explicit policy\n\n## Deliver\n\n- stable protobuf contracts and generated-code ownership\n- service and client code that match the RPC shape\n- explicit deadline, cancellation, retry, and status-code behavior\n- tests or smoke checks for serialization and call behavior\n- documentation of browser, transport, or deployment constraints when relevant\n\n## Validate\n\n- `dotnet build` succeeds after contract or generated-code changes\n- tests or smoke checks exercise at least one server/client call\n- streaming methods respect cancellation and bounded message sizes\n- channels are reused through client factory or a long-lived channel\n- status-code handling is intentional and observable\n- browser constraints are documented if gRPC-Web is involved\n","tagline":"Build or review gRPC services and clients in .NET. 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Report success only after the skill is installed and a minimal verification passes."}],"handoff_url":"https://www.openagentskill.com/api/skills/managedcode-grpc/install","manifest_url":"https://www.openagentskill.com/api/registry/manifest/managedcode-grpc"},"trust":{"score":79,"label":"Strong shortlist","version":"trust-score-v4","install_policy":"human_review_before_install","evidence":{"stars":"477 GitHub stars","repoActivity":"477 stars, 33 forks","lastPushed":"2d since push","license":"MIT","repository":"https://github.com/managedcode/dotnet-skills/tree/main/catalog/Frameworks/gRPC/skills/grpc","install":"npx skills add managedcode/dotnet-skills --skill grpc","installSafety":"standard package or runtime install path","permissionSurface":"filesystem or document access, network or browser access","documentation":"Strong README/SKILL.md context","agentOutcomes":"No agent outcome data yet"},"outcome_evidence":{"total":0,"successes":0,"failures":0,"not_relevant":0,"success_rate":null,"recent_success_rate":null,"recent_failure_rate":null,"install_attempts":0,"install_success_rate":null,"risk_blocked":0,"setup_required":0,"avg_output_quality":null,"production_outcomes":0,"last_outcome_at":null,"label":"No agent outcome data yet"},"auto_install":{"allowed":false,"sandbox_required":true,"reason":"Human review or sandbox validation is required before automatic installation."},"best_for":["design-creative","agent-skill"],"known_risks":["Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Stars/forks activity: 477 stars, 33 forks; issue activity unavailable in current metadata"]},"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":83,"risk_level":"needs_review","risk_label":"Needs review","warnings":["Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Stars/forks activity: 477 stars, 33 forks; issue activity unavailable in current metadata"]},"safety_gate":{"tier":"reviewed","label":"Reviewed with permission notes","auto_install_policy":"review","auto_install_allowed":false,"human_review_required":true,"blocked":false,"recommended_action":"Require human approval before installing into a real workspace."},"quality":{"score":74,"label":"Strong"},"supply":{"track":"Coding and developer agents","scenario":"Testing and QA","maintenance":"2d 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 OpenAgentSkill engagement data yet","Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Stars/forks activity: 477 stars, 33 forks; issue activity unavailable in current metadata","Production credentials, payments, or irreversible account changes without explicit human review"],"agent_contract":{"task_input":"Use grpc in an agent workflow","recommended_action":"Require human approval before installing into a real workspace.","install_policy":"review","minimum_review_before_use":["Trust: 79/100 Strong shortlist","Audit: 83/100 Needs review","Safety: 63/100 Review before install","Review repository, license, install command, and permission surface before production use."],"expected_agent_output":{"selected_skill":"managedcode-grpc (grpc)","install_command":"npx skills add managedcode/dotnet-skills --skill grpc","risk_summary":"Needs review; Reviewed with permission notes; 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":"managedcode-grpc","task":"Use 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/managedcode-grpc","api":"https://www.openagentskill.com/api/agent/skills/managedcode-grpc","audit":"https://www.openagentskill.com/skills/managedcode-grpc/audit","eval":"https://www.openagentskill.com/api/agent/evals?slug=managedcode-grpc&task=Use%20grpc%20in%20an%20agent%20workflow&max_risk=medium","resolve":"https://www.openagentskill.com/api/agent/resolve?task=Use%20grpc%20in%20an%20agent%20workflow&agent=codex&max_risk=medium","receipt":"https://www.openagentskill.com/api/agent/receipt?task=Use%20grpc%20in%20an%20agent%20workflow&agent=codex&max_risk=medium&format=text","install":"https://www.openagentskill.com/api/skills/managedcode-grpc/install","manifest":"https://www.openagentskill.com/api/registry/manifest/managedcode-grpc"}},"supply_profile":{"track":{"slug":"coding","label":"Coding and developer agents","shortLabel":"Coding","description":"Code review, repo analysis, testing, CI, GitHub, DevOps, and developer workflow skills."},"scenario":{"label":"Testing and QA","description":"I need my agent to test a web app, reproduce bugs, and verify fixes.","useCases":[{"slug":"browser-automation","title":"Browser automation"},{"slug":"local-desktop","title":"Local desktop"},{"slug":"workflow-automation","title":"Workflow automation"}]},"applicableAgents":["Claude Code","Browser agents","CLI","Codex","Cursor"],"install":{"ready":true,"command":"npx skills add managedcode/dotnet-skills --skill grpc","primaryTarget":"CLI","targetCount":4},"githubQuality":{"stars":477,"starsLabel":"477","forks":33,"license":"MIT","qualityScore":74,"trustScore":79,"auditScore":83},"maintenance":{"status":"fresh","label":"2d since push","daysSincePush":2,"lastPushedAt":"2026-09-05T07:56:40+00:00"},"risk":{"level":"needs_review","label":"Needs review","requiresReview":true,"notes":["Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Stars/forks activity: 477 stars, 33 forks; issue activity unavailable in current metadata","Needs review"]},"coverageTags":["Coding","Testing and QA","design-creative","agent-skill"]},"audit":{"audit_score":83,"risk_level":"needs_review","risk_label":"Needs review","quality_score":74,"trust_score":79,"maintenance_score":100,"security_score":85,"install_score":92,"warnings":["Financial research output is not financial advice; require human review before any live investment decision","Financial research output is not financial advice; require human review before any live investment decision.","Quality score needs review","Stars/forks activity: 477 stars, 33 forks; issue activity unavailable in current metadata"]},"quality_signals":{"model":"v2","star_score":18.76,"usage_score":0,"review_score":5.4,"metadata_score":3,"freshness_score":15},"platforms":["Claude Code","Browser agents"],"use_cases":[{"slug":"browser-automation","title":"Browser automation","url":"https://www.openagentskill.com/use-cases/browser-automation"},{"slug":"local-desktop","title":"Local desktop","url":"https://www.openagentskill.com/use-cases/local-desktop"},{"slug":"workflow-automation","title":"Workflow automation","url":"https://www.openagentskill.com/use-cases/workflow-automation"},{"slug":"testing-qa","title":"Testing and QA","url":"https://www.openagentskill.com/use-cases/testing-qa"}],"stacks":[{"slug":"browser-qa-agent","title":"Browser QA agent","url":"https://www.openagentskill.com/collections/browser-qa-agent"},{"slug":"frontend-product-ui","title":"Frontend and UI","url":"https://www.openagentskill.com/collections/frontend-product-ui"},{"slug":"content-growth-agent","title":"Content growth agent","url":"https://www.openagentskill.com/collections/content-growth-agent"}],"install":"npx skills add managedcode/dotnet-skills --skill grpc","install_targets":[{"id":"openagentskill-cli","label":"CLI","title":"OpenAgentSkill CLI","kind":"command","value":"npx --yes https://github.com/Leon-Drq/openagentskill/releases/download/cli-v0.3.0/openagentskill-0.3.0.tgz add managedcode-grpc","description":"Resolve policy, run the source installer safely, and report a verified install receipt.","copyLabel":"Copy command"},{"id":"codex","label":"Codex","title":"Codex install prompt","kind":"agent-prompt","value":"Install the \"grpc\" agent skill from https://github.com/managedcode/dotnet-skills/tree/main/catalog/Frameworks/gRPC/skills/grpc. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Build or review gRPC services and clients in .NET. USE FOR: ASP.NET Core gRPC, protobuf contracts, unary or streaming RPC, gRPC client factory, interceptors, deadlines, cancellation, channel reuse, backend service integration. DO NOT USE FOR: broad browser-facing APIs without gRPC-Web tradeoff review, SignalR realtime hubs, plain REST APIs. INVOKES: dotnet build/test and focused service or client smoke checks when code changes. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"managedcode-grpc\",\"task\":\"Install grpc\",\"agent\":\"codex\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Give Codex a repo-aware install prompt when the skill is not available through a local CLI.","copyLabel":"Copy prompt"},{"id":"claude-code","label":"Claude Code","title":"Claude Code skill prompt","kind":"agent-prompt","value":"Add \"grpc\" as a Claude Code skill from https://github.com/managedcode/dotnet-skills/tree/main/catalog/Frameworks/gRPC/skills/grpc. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Build or review gRPC services and clients in .NET. USE FOR: ASP.NET Core gRPC, protobuf contracts, unary or streaming RPC, gRPC client factory, interceptors, deadlines, cancellation, channel reuse, backend service integration. DO NOT USE FOR: broad browser-facing APIs without gRPC-Web tradeoff review, SignalR realtime hubs, plain REST APIs. INVOKES: dotnet build/test and focused service or client smoke checks when code changes. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"managedcode-grpc\",\"task\":\"Install grpc\",\"agent\":\"claude-code\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this prompt to ask Claude Code to add the skill and explain the local activation steps.","copyLabel":"Copy prompt"},{"id":"cursor","label":"Cursor","title":"Cursor rule prompt","kind":"agent-prompt","value":"Turn \"grpc\" from https://github.com/managedcode/dotnet-skills/tree/main/catalog/Frameworks/gRPC/skills/grpc into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Build or review gRPC services and clients in .NET. USE FOR: ASP.NET Core gRPC, protobuf contracts, unary or streaming RPC, gRPC client factory, interceptors, deadlines, cancellation, channel reuse, backend service integration. DO NOT USE FOR: broad browser-facing APIs without gRPC-Web tradeoff review, SignalR realtime hubs, plain REST APIs. INVOKES: dotnet build/test and focused service or client smoke checks when code changes. After the install attempt, report the result to https://www.openagentskill.com/api/agent/outcome with POST JSON {\"event_id\":\"install_<unique-id>\",\"skill_slug\":\"managedcode-grpc\",\"task\":\"Install grpc\",\"agent\":\"cursor\",\"outcome\":\"success\",\"install_used\":true}. Replace event_id with a unique value and outcome with success or failed. Report success only after the skill is installed and a minimal verification passes.","description":"Use this when installing as Cursor project rules or reusable agent instructions.","copyLabel":"Copy prompt"}],"repository":"https://github.com/managedcode/dotnet-skills/tree/main/catalog/Frameworks/gRPC/skills/grpc","github_repo":"managedcode/dotnet-skills","version":"1.0.0","license":"MIT","urls":{"web":"https://www.openagentskill.com/skills/managedcode-grpc","repository":"https://github.com/managedcode/dotnet-skills/tree/main/catalog/Frameworks/gRPC/skills/grpc","api":"/api/agent/skills/managedcode-grpc","install_api":"/api/skills/managedcode-grpc/install"},"meta":{"created_at":"2026-09-05T15:12:51.331919+00:00","updated_at":"2026-09-05T15:12:51.536811+00:00","agent_friendly":true}}