What is tiny-go-mcp-server AGENTS.md?

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

Use them to run tests, lint the code and tool descriptions, check coverage, build the server, and run its example programs.

They provide the commands, folder map, API notes, and conventions needed to change the code without guessing how the project works.

How kioie/tiny-go-mcp-server configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to kioie/tiny-go-mcp-server. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/kioie/tiny-go-mcp-server/main/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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/kioie/tiny-go-mcp-server/agents-md/github.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/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<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="Reviewed on agentmods" width="80" 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. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.01088	$0.01088
Opus 5.5	$0.00435	$0.00435
Sonnet 5.5	$0.00218	$0.00218
Haiku 4.5	$0.00109	$0.00109

Measured 2mo ago against content hash 4aba9551469d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 2mo 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.

2mo 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 $0.0044 per session on Opus 5.5. 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.

Go LLM ai-agents cursor go mcp

tiny-go-mcp-server AGENTS.md next to 6 instructions from other repositories
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tiny-go-mcp-server: Instructions file for Codex