Fantastical Calendar

Community

twhsi

fantastical-calendar

Create Fantastical calendar events and reminders from Codex on macOS. Use when the user asks Codex to add, schedule, parse, preview, or send a meeting, appointment, task, reminder, time block, daily plan item, 行事曆, 日曆, 會議, 待辦, or 提醒 into Fantastical.

Overview

Publisher	twhsi
Repository	`skills`
Skill name	`fantastical-calendar`
Stars	259
Forks	37
Bundled files	3
Links	Skill source Repository Homepage

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
3 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by twhsi on GitHub. Read the source before you install it.

Installation

Install the Fantastical Calendar AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/twhsi/skills/tree/main/skills/fantastical-calendar
Enable the skill in any chat where you want it available.

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/twhsi/skills.git /tmp/skills
mkdir -p .claude/skills
cp -r /tmp/skills/skills/fantastical-calendar .claude/skills/fantastical-calendar

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Fantastical Calendar in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Fantastical Calendar on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Fantastical Calendar is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Fantastical Calendar

Overview

Use this skill to turn a user's natural-language scheduling request into a Fantastical event or reminder through the local macOS Fantastical app.

Prefer the bundled script over ad hoc AppleScript:

bash
python3 scripts/fantastical_parse.py "Project review on 2026-06-19 at 10:00" --notes "Prep deck before the call"

The script defaults to preview mode: it opens Fantastical with the parsed item but does not add it immediately.

Workflow

Clarify only when a calendar detail is genuinely ambiguous: date, time, duration, title, attendee context, calendar, or whether it is an event vs reminder.
Convert relative dates into explicit dates before sending to Fantastical whenever possible. Use the user's current timezone from the thread context or check the system date if needed.
Build one concise Fantastical sentence containing the title, exact date, start time, and duration or end time.
Put extra context, links, preparation notes, or source text in --notes instead of overloading the event title.
Run scripts/fantastical_parse.py from this skill folder.
Tell the user whether Fantastical was opened for review or the item was added immediately.

Add Policy

Use preview mode unless the user explicitly asks to add/create/schedule it now or has confirmed the parsed result.

Preview:

bash
python3 scripts/fantastical_parse.py "Deep work on 2026-06-19 from 09:00 to 11:00"

Add immediately:

bash
python3 scripts/fantastical_parse.py "Deep work on 2026-06-19 from 09:00 to 11:00" --add-immediately

Dry run for validation:

bash
python3 scripts/fantastical_parse.py "Deep work on 2026-06-19 from 09:00 to 11:00" --dry-run

Sentence Patterns

Use explicit, Fantastical-friendly wording:

Team sync on 2026-06-19 from 10:00 to 10:30
Call Alice on 2026-06-20 at 15:00 for 45 minutes
Remind me to submit expenses on 2026-06-21 at 09:00
Focus block on 2026-06-18 from 14:00 to 16:00

For Chinese user requests, keep the user-facing reply in Chinese, but send Fantastical an explicit mixed or English sentence if it reduces parsing risk.

Local Integration Details

Read references/fantastical-macos.md only when debugging the app integration, updating the script, or adapting it to another Fantastical version.

The current script uses AppleScript parse sentence first and can fall back to the Fantastical URL scheme when needed.

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Fantastical Calendar AI skill do?

Why use Fantastical Calendar on TypingMind?

Because you install it once and use it with any model. Fantastical Calendar is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Fantastical Calendar in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/twhsi/skills/tree/main/skills/fantastical-calendar. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Fantastical Calendar?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Fantastical Calendar?

As many as you like. As long as a model supports skills, you can use Fantastical Calendar with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Fantastical Calendar AI skill free?

It is published on GitHub by twhsi. Check the repository for licensing terms. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Fantastical Calendar

Overview

Workflow

Add Policy

Sentence Patterns

Local Integration Details

Bundled files

Frequently asked questions

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