What is icloud-reminders-mcp CLAUDE.md?

A set of project instructions for an iCloud Reminders integration, including coding rules, architecture notes, testing guidance, and secret-handling rules.

It is for maintaining the icloud-reminders-mcp codebase, tracking work in GitHub issues, preserving calendar data, and running the project with secrets supplied securely.

It gives an agent the project’s conventions in one place, so it knows where changes belong and avoids unsafe practices such as committing credentials.

How Lingnik/icloud-reminders-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Lingnik/icloud-reminders-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/Lingnik/icloud-reminders-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/Lingnik/icloud-reminders-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/lingnik/icloud-reminders-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/lingnik/icloud-reminders-mcp/claude-md)

Your own site

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

Per session 544 This file is loaded in full into every session.

When invoked 544 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	$0.00544	$0.00544
Opus 5	$0.00272	$0.00272
Sonnet 5	$0.00109	$0.00109
Haiku 4.5	$0.00054	$0.00054

Measured 9d ago against content hash 8834bee801d2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

icloud-reminders-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 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.

CLAUDE.md · 46 lines

How it starts

The opening of the file, as written. The whole thing — 46 lines — stays where its author put it; the contents beside it link to each section on GitHub.

icloud-reminders-mcp — project conventions

Backlog: GitHub issues, always

All backlog items live as GitHub issues on Lingnik/icloud-reminders-mcp — never TODO comments, never doc lists. When work items, ideas, deferred fixes, or follow-ups surface, file an issue immediately with gh issue create. Reference issues in commits (Closes #N / Refs #N). Check gh issue list first.

Secrets

Never hardcode credentials or write a real .env. Only .env.example is tracked. This repo is public — no real values, list names, or captured account fixtures ever get committed.
Runtime secrets come from 1Password: op run --env-file ~/.secrets -- …. The refs are ICLOUD_USERNAME / ICLOUD_APP_PASSWORD → op://kalipi-claude/icloud-reminders-mcp/{username,password}.

Architecture

config.py — env parsing, allowlist, flags. No network.
vtodo.py — pure VTODO⇄dict mapping + construction. No network. Updates mutate the parsed component in place; never rebuild a VTODO from JSON, so unknown properties (RRULE/VALARM/RELATED-TO/X-APPLE-*) are preserved.
caldav_client.py — all network: discovery, CRUD, ETag concurrency, backoff.
server.py — FastMCP tool registration (stdio).
errors.py — typed error hierarchy.

Testing

Everything under tests/ is network-free (pure logic + a fake CalDAV layer). Fixtures are synthetic — never from a real account.
scripts/doctor.py is the only thing that hits the real account. Never run it in CI.
Before pushing: uv run ruff check . and uv run pytest must pass.

iCloud gotchas (hard-won; keep in mind)

Discover from the root; never hardcode the pNN-caldav.icloud.com shard.
Only non-"upgraded" (pre-CloudKit) reminder lists sync via CalDAV; some accounts have none.
iCloud may normalize/drop properties on write and hides completed todos from the default query (include_completed=True to see them).
Keep create_list (MKCALENDAR) out until round-trip fidelity is proven — CalDAV-created lists may not surface in the iOS app.

Read the full file on GitHub · 46 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.

9d ago First seen · 46 lines · 544 tokens per session scan A 8834bee801d2

Subscribe to this mod's changes

icloud-reminders-mcp CLAUDE.md is an instructions file published in the GitHub repository Lingnik/icloud-reminders-mcp (3 stars, last pushed 2mo ago), licensed MIT. It adds 544 tokens to every session, about $0.0027 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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icloud-reminders-mcp: Instructions file for Claude Code