mcp-garmin: Instructions file for Codex

AGENTS.md

mcp-garmin AGENTS.md is an instructions file for Codex, OpenCode from obrien-matthew/mcp-garmin. It costs 294 tokens per session, scanned A, a copy of mcp-steam AGENTS.md, MIT.

Repository instructions for an MCP server that connects AI assistants to Garmin Connect data. They define how tools should return structured lists and objects, report errors, and represent empty results.

In plain words
What is it for?
Implementing or reviewing Garmin search, list, detail, pagination, deletion confirmations, scans, and restart-related tools.
Why use it?
They prevent data from being returned as hard-to-use text and keep failures visible to the calling assistant.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions AGENTS.md.

This is obrien-matthew/mcp-garmin's own configuration. It tells Codex and OpenCode how to work on mcp-garmin itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-garmin configures →

Reuse

Borrowing it

Nothing to install: this file belongs to obrien-matthew/mcp-garmin. 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/obrien-matthew/mcp-garmin/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/obrien-matthew/mcp-garmin

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.

agentmods badge for mcp-garmin AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/obrien-matthew/mcp-garmin/agents-md.svg)](https://agentmods.dev/instructions/obrien-matthew/mcp-garmin/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/obrien-matthew/mcp-garmin/agents-md"><img src="https://agentmods.dev/badge/instructions/obrien-matthew/mcp-garmin/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 294 This file is loaded in full into every session.
When invoked 294 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 84% copy Near-identical to another mod 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 5.1 $0.00294 $0.00294
Opus 5 $0.00147 $0.00147
Sonnet 5 $0.00059 $0.00059
Haiku 4.5 $0.00029 $0.00029

Measured 3d ago against content hash 850082524c4a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

mcp-garmin 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.

Origin

This is a copy

84% identical to mcp-steam AGENTS.md — 14 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

AGENTS.md · 27 lines

What it actually says

mcp-garmin

MCP server for Garmin Connect.

Conventions

Follows the shared conventions from mcp-template (see its AGENTS.md for full rationale): data tools return real dict/list[dict] directly (never json.dumps); action/status tools may return a human-readable -> str, as may tools whose result is genuinely a single string (IDs, versions); errors are raised, never caught and returned as strings; empty results are empty containers ({}, []), not sentinel messages.

Layout

  • src/garmin_mcp/server.py -- MCP tool definitions
  • src/garmin_mcp/client.py -- HTTP/API client wrapper
  • src/garmin_mcp/transforms.py -- response transforms that produce LLM-friendly dicts (no json.dumps)
  • src/garmin_mcp/validation.py -- input validators
  • src/garmin_mcp/auth.py -- credential loading

Workflow

uv sync                       # install deps
uv run pytest -q              # run tests
uv run ruff check .           # lint
uv run ruff format .          # format
uv run pyright src/           # typecheck
lefthook install              # set up git hooks (one-time)
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 Changed · -22 lines · -225 tokens per session 850082524c4a
  2. 7d ago First seen · 49 lines · 519 tokens per session scan A 1ec7573647c7

Subscribe to this mod's changes

mcp-garmin AGENTS.md is an instructions file published in the GitHub repository obrien-matthew/mcp-garmin (0 stars, last pushed 6d ago), licensed MIT. It adds 294 tokens to every session, about $0.0015 per session on Opus 5. A static security scan graded it A with 0 findings. It is 84% identical to mcp-steam AGENTS.md, differing in 14 lines, and is treated as a copy.

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