What is skylight-mcp CLAUDE.md?

Repository instructions for skylight-mcp, an MCP server that connects AI assistants to the Skylight family calendar service. It covers calendars, chores, lists, tasks, rewards, meals, and photos.

Use them when developing, testing, linting, type-checking, or generating API types for the Skylight MCP server.

They explain the project's commands, authentication, subscription-dependent tools, and two-layer code structure so contributors can change it safely.

How rjhalvorson/skylight-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to rjhalvorson/skylight-mcp. 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/rjhalvorson/skylight-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/rjhalvorson/skylight-mcp

Made for: Claude Code.

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/rjhalvorson/skylight-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/rjhalvorson/skylight-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/rjhalvorson/skylight-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/rjhalvorson/skylight-mcp/claude-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/rjhalvorson/skylight-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/rjhalvorson/skylight-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,333 This file is loaded in full into every session.

When invoked 1,333 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	$0.01333	$0.01333
Opus 5.5	$0.00533	$0.00533
Sonnet 5.5	$0.00267	$0.00267
Haiku 4.5	$0.00133	$0.00133

Measured 2mo ago against content hash 05f6d5550f4e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skylight-mcp CLAUDE.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.

CLAUDE.md · 111 lines

How it starts

The opening of the file, as written. The whole thing — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Overview

MCP server enabling AI assistants to interact with the Skylight family calendar API (calendar, chores, lists, tasks, rewards, meals, photos).

Base API URL: https://app.ourskylight.com

Commands

npm install
npm run build          # Compile TypeScript
npm run dev            # Development with hot reload (tsx watch)
npm test               # Run vitest tests
npm test -- dates      # Run single test file (matches filename)
npm run test:coverage  # Tests with coverage
npm run lint           # ESLint
npm run typecheck      # tsc --noEmit
npm run generate:types # Generate TypeScript types from OpenAPI spec

Architecture

Two-tier tool system:

api/endpoints/*.ts (11 modules) - Low-level HTTP wrappers for each API resource
tools/*.ts (9 modules) - MCP tool definitions with Zod parameter validation

Tool Registration: Each domain exports registerXxxTools(server) called from server.ts. Plus-only tools are conditionally registered based on subscription status.

Key files:

config.ts - Zod-validated env config supporting two auth methods
api/client.ts - HTTP client with Bearer/Basic auth, auto-login, subscription status tracking
api/auth.ts - Browser-style OAuth login flow for email/password authentication
api/constants.ts - Shared API URLs and version header
api/generated-types.ts - Auto-generated types from OpenAPI spec
utils/dates.ts - Parses "today", "tomorrow", day names, YYYY-MM-DD
manifest.json - MCPB bundle manifest for Claude Desktop one-click install (version synced from tag at release time)

Authentication

Two methods supported (validated via Zod refinement in config.ts):

Email/Password (recommended): Set SKYLIGHT_EMAIL and SKYLIGHT_PASSWORD. Server reproduces the Skylight web OAuth flow (/oauth/authorize -> login form -> /auth/session -> /oauth/token) and then uses the returned bearer token for API requests.
Manual Token: Set SKYLIGHT_TOKEN and optionally SKYLIGHT_AUTH_TYPE (bearer/basic).

Read the full file on GitHub · 111 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 · 111 lines · 1,333 tokens per session scan A 05f6d5550f4e

Subscribe to this mod's changes

skylight-mcp CLAUDE.md is an instructions file published in the GitHub repository rjhalvorson/skylight-mcp (14 stars, last pushed 6mo ago), licensed MIT. It adds 1,333 tokens to every session, about $0.0053 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.

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skylight-mcp: Instructions file for Claude Code