Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/kouroshez/coding-os/grpc-microservicesnpx skills add kouroshez/coding-os --skill grpc-microservicesgit clone --depth 1 https://github.com/kouroshez/coding-osWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/kouroshez/coding-os/grpc-microservices)<a href="https://agentmods.dev/skills/kouroshez/coding-os/grpc-microservices"><img src="https://agentmods.dev/badge/skills/kouroshez/coding-os/grpc-microservices.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00208 | $0.02842 |
| Opus 5 | $0.00104 | $0.01421 |
| Sonnet 5 | $0.00042 | $0.00568 |
| Haiku 4.5 | $0.00021 | $0.00284 |
Grade A, and why
grpc-microservices scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 175 lines — stays where its author put it; the contents beside it link to each section on GitHub.
gRPC + Microservices — Protobuf, RPC, Mesh
A practical guide to gRPC for east-west (service-to-service) traffic. Stack-agnostic; concrete patterns reference grpc-go, grpcio (Python), and @grpc/grpc-js (Node), with Envoy / a service mesh as the proxy layer.
When to Use This Skill
- Defining or evolving a
.protoservice contract. - Choosing gRPC vs REST/GraphQL for traffic between services you control on both ends.
- Debugging
DEADLINE_EXCEEDED,UNAVAILABLE, or a backward-incompatible Protobuf change. - Designing streaming RPCs (server-stream, client-stream, bidi).
- Wiring interceptors for auth, tracing, metrics, retries.
- Standing up mTLS, client-side load balancing, or a gRPC mesh.
- Exposing a gRPC service to external REST clients via gRPC-Gateway.
Skip when: the consumer is a browser/mobile/3rd-party over public HTTP (that is api-design's REST/GraphQL territory), or the need is a long-lived bidirectional browser socket (that is realtime-websockets).
Boundary — gRPC vs api-design vs realtime-websockets
| Concern | Owner |
|---|---|
| Public, external, heterogeneous HTTP API (REST/GraphQL), RFC 9457 envelopes, URL/header versioning, idempotency keys | api-design |
| Binary east-west gRPC between controlled services: Protobuf evolution, the four RPC kinds, gRPC status codes, deadlines, interceptors, mesh | grpc-microservices (this skill) |
| Long-lived bidirectional sockets to browsers (WebSocket/SSE), heartbeats, reconnect, fan-out | realtime-websockets |
The split is who controls both ends and over what network. api-design serves consumers that cannot be coordinated and speak HTTP/JSON; this skill serves internal services that share a generated stub and speak HTTP/2 + Protobuf. When a gRPC service must face external REST clients, gRPC-Gateway translates at the edge — and that REST surface is then governed by api-design.
Protobuf — Schema Evolution Is the Whole Game
The .proto is the contract; the wire format is field-number-based, which makes additive evolution safe and renames cheap — if the rules are followed.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 175 lines · 208 tokens per session scan A 86bc9d28feff
grpc-microservices is a skill published in the GitHub repository kouroshez/coding-os (6 stars, last pushed 3d ago), licensed Apache-2.0. It adds 208 tokens to every session and 2,842 once invoked, about $0.0010 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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