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tiny-go-mcp-server AGENTS.md

tiny-go-mcp-server AGENTS.md is an instructions file for Codex, OpenCode from kioie/tiny-go-mcp-server. It costs 1,088 tokens per session, scanned A, original, MIT.

Repository instructions for AI coding agents working on a small Go server that exposes tools through the Model Context Protocol (MCP).

In plain words
What is it for?
Use them to run tests, lint the code and tool descriptions, check coverage, build the server, and run its example programs.
Why use it?
They provide the commands, folder map, API notes, and conventions needed to change the code without guessing how the project works.

Instructions file for CodexOpenCode

not rated 1 1mo ago A scan 1,088 tokens original MIT
View the source file kioie/tiny-go-mcp-server
Install

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.

agentmods
npx agentmods add instructions/kioie/tiny-go-mcp-server/agents-md
Clone the repo
git clone --depth 1 https://github.com/kioie/tiny-go-mcp-server

Made for: Codex, OpenCode.

Wrote 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.

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README.md
[![agentmods](https://agentmods.dev/badge/instructions/kioie/tiny-go-mcp-server/agents-md.svg)](https://agentmods.dev/instructions/kioie/tiny-go-mcp-server/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/kioie/tiny-go-mcp-server/agents-md"><img src="https://agentmods.dev/badge/instructions/kioie/tiny-go-mcp-server/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,088 This file is loaded in full into every session.
When invoked 1,088 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.01088 $0.01088
Opus 5 $0.00544 $0.00544
Sonnet 5 $0.00218 $0.00218
Haiku 4.5 $0.00109 $0.00109

Measured 3d ago against content hash 4aba9551469d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tiny-go-mcp-server AGENTS.md 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.

AGENTS.md · 64 lines

How it starts

The opening of the file, as written. The whole thing — 64 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent instructions (Tiny Go MCP Server)

Guidance for AI coding agents working in this repository. For a compact, token-efficient API cheat sheet (including when generating code outside this repo), see SYSTEM_PROMPT.md.

Commands

  • Test all: make test or go test -race ./...
  • Test package: go test -race -v ./tinymcp
  • Test single: go test -run TestName ./path/to/pkg -v
  • Lint: make lint (requires golangci-lint)
  • Lint tool descriptions: make lint-tools (AGENTS.md when/when-not/siblings pattern)
  • Coverage: make coverage (all packages) or make coverage-check (70% gate on tinymcp + cmd)
  • Build example server: make build → ./tiny-go-mcp
  • Minimal example: go run ./examples/minimal
  • HTTP example: go run ./examples/http (listens on :8080, override with TINY_GO_MCP_ADDR)
  • HTTP deploy / Smithery URL: go run ./examples/http-deploy — see docs/SMITHERY.md
  • Resources/prompts example: go run ./examples/resources

Layout

  • tinymcp/ — importable library (github.com/kioie/tiny-go-mcp-server/tinymcp)
  • cmd/tiny-go-mcp/ — reference MCP server (add, subtract, greet tools)
  • examples/minimal/ — smallest possible server for copy-paste

API notes

  • Tool registration: tinymcp.RegisterTool(server, name, desc, handler) or RegisterToolDef for full mcp.Tool metadata — returns errors for nil server and invalid tool definitions (no panics). Use MustRegisterTool / MustRegisterPrompt at startup to panic on misconfiguration.
  • Registration errors: errors.Is(err, tinymcp.ErrNilServer), ErrNilTool, ErrNilHandler, ErrRegistrationFailed — do not string-match.
  • Resource/prompt registration: nil handlers return errors at registration time; nil server is reported before nil handler.
  • Server options: NewServer(name, ver, tinymcp.WithInstructions(...)) or NewServerWithOptions(name, ver, &mcp.ServerOptions{...}); full control via RawServer().
  • Handlers need both tinymcp and github.com/modelcontextprotocol/go-sdk/mcp imports.
  • HTTP middleware: tinymcp.WithCrossOriginProtection, tinymcp.BearerTokenAuth, tinymcp.DisableLocalhostProtectionFromEnv, HTTPOptions.WithMiddleware — see examples/http-deploy.
  • HTTP lifecycle: ListenAndServeHTTP drains on SIGINT/SIGTERM; ListenAndServeHTTPContext / StartHTTPContext for custom shutdown — see docs/HTTP.md.
  • Optional server logs: set env TINY_GO_MCP_VERBOSE=1 (stderr only; stdio is reserved for MCP).
  • HTTP/SSE: StartHTTP, StartSSE, StreamableHTTPHandler, SSEHandler — see docs/HTTP.md.
  • Resources: RegisterResource, RegisterResourceTemplate, RegisterTextResource, TextResource
  • Prompts: RegisterPrompt, PromptResult, UserPromptMessage, AssistantPromptMessage

Read the full file on GitHub · 64 lines

Changes

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.

  1. 3d ago First seen · 64 lines · 1,088 tokens per session scan A 4aba9551469d

Subscribe to this mod's changes

tiny-go-mcp-server AGENTS.md is an instructions file published in the GitHub repository kioie/tiny-go-mcp-server (1 stars, last pushed 1mo ago), licensed MIT. It adds 1,088 tokens to every session, about $0.0054 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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