noaa-marine-mcp-server: Instructions file for Claude Code

AGENTS.md

noaa-marine-mcp-server AGENTS.md is an instructions file for Claude Code, Codex, OpenCode from cyanheads/noaa-marine-mcp-server. It costs 6,049 tokens per session, scanned A, a copy of obsidian-mcp-server AGENTS.md, Apache-2.0.

A project-specific instruction file for the NOAA marine MCP server, an application that lets AI tools use marine data services. It describes the server’s development rules, patterns, and available next steps.

In plain words
What is it for?
Use it when maintaining the server, planning the next task, or adding tools, data resources, prompts, services, and tests.
Why use it?
It gives a coding agent the project context and conventions it needs before making changes. This reduces guesswork and helps keep new work consistent with the existing server.

Instructions file for Claude CodeCodexOpenCode

Written for Claude Code and Codex and OpenCode: Claude Code plugin machinery, but also the file is AGENTS.md. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions subagents.

This is cyanheads/noaa-marine-mcp-server's own configuration. It tells Claude Code, Codex and OpenCode how to work on noaa-marine-mcp-server 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 noaa-marine-mcp-server configures →

Reuse

Borrowing it

Nothing to install: this file belongs to cyanheads/noaa-marine-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/cyanheads/noaa-marine-mcp-server/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/cyanheads/noaa-marine-mcp-server

Made for: Claude Code, Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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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.

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Your own site · 80×15
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Per session 6,049 This file is loaded in full into every session.
When invoked 6,049 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 83% 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 $0.06049 $0.06049
Opus 5 $0.03024 $0.03024
Sonnet 5 $0.01210 $0.01210
Haiku 4.5 $0.00605 $0.00605

Measured 9d ago against content hash 3f44f6c8091d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

noaa-marine-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 9d 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

83% identical to obsidian-mcp-server AGENTS.md — 315 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 · 396 lines

How it starts

The opening of the file, as written. The whole thing — 396 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Developer Protocol

Server: noaa-marine-mcp-server Version: 0.3.1 Framework: @cyanheads/mcp-ts-core 0.12.3 Engines: Bun ≥1.3.0, Node ≥24.0.0 MCP SDK: @modelcontextprotocol/server ^2.0.0 (protocol revisions 2026-07-28 and 2025-*) Zod: ^4.4.3

Read the framework docs first: node_modules/@cyanheads/mcp-ts-core/CLAUDE.md contains the full API reference — builders, Context, error codes, exports, patterns. This file covers server-specific conventions only.


What's Next?

When the user asks what's next or needs direction, suggest options based on the current project state. Common next steps:

  1. Re-run the setup skill — ensures CLAUDE.md, skills, structure, and metadata are populated and up to date with the current codebase
  2. Run the design-mcp-server skill — if the tool/resource surface hasn't been mapped yet, work through domain design
  3. Add tools/resources/prompts — scaffold new definitions using the add-tool, add-app-tool, add-resource, add-prompt skills
  4. Add services — scaffold domain service integrations using the add-service skill
  5. Add tests — scaffold tests for existing definitions using the add-test skill
  6. Field-test definitions — exercise tools/resources/prompts with real inputs using the field-test skill, get a report of issues and pain points
  7. Run devcheck — lint, format, typecheck, and security audit
  8. Run the security-pass skill — audit handlers for MCP-specific security gaps: output injection, scope blast radius, input sinks, tenant isolation
  9. Run the polish-docs-meta skill — finalize README, CHANGELOG, metadata, and agent protocol for shipping
  10. Run the maintenance skill — investigate changelogs, adopt upstream changes, and sync skills after bun update --latest

Tailor suggestions to what's actually missing or stale — don't recite the full list every time.


Core Rules

Read the full file on GitHub · 396 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. 9d ago First seen · 396 lines · 6,049 tokens per session scan A 3f44f6c8091d

Subscribe to this mod's changes

noaa-marine-mcp-server AGENTS.md is an instructions file published in the GitHub repository cyanheads/noaa-marine-mcp-server (1 stars, last pushed 16d ago), licensed Apache-2.0. It adds 6,049 tokens to every session, about $0.0302 per session on Opus 5. A static security scan graded it A with 0 findings. It is 83% identical to obsidian-mcp-server AGENTS.md, differing in 315 lines, and is treated as a copy.

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