Aion

AI-powered calendar agent for Google Calendar.

Schedule, list, reschedule, and find free time — all from natural language in your terminal.

  aion > schedule gym tomorrow morning
  Finding optimal slot for 'gym'...
  Schedule 'gym' on February 19, 2026 at 07:00 for 60 min? [y/n]: y
  ✔ Created! 'gym' on 2026-02-19 at 07:00

Part of A.U.R.A (Autonomous Unified Reasoning Assistant).

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Features

• Natural language — "schedule dentist friday at 2pm for 45 min", "what's on tomorrow?"
• Smart scheduling — ASP/Clingo constraint solver finds optimal slots avoiding conflicts
• Google Calendar sync — reads and writes real events via Calendar API v3
• Conflict detection — warns on overlaps, offers alternatives
• User preferences — block time slots (lunch, sleep), set default morning/afternoon/evening
• Timezone-aware — auto-detects your timezone from Google Calendar on login
• Ollama NLU (optional) — local LLM fallback for complex commands, auto-installs on first run

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Architecture

User Input
    │
    ▼
┌──────────────┐    ┌──────────────┐
│ Regex NLU    │───▶│ Ollama LLM   │  (optional fallback)
│ (intent.py)  │    │ (ollama.py)  │
└──────┬───────┘    └──────────────┘
       │
       ▼
┌──────────────┐    ┌──────────────┐
│ ASP Solver   │───▶│    Clingo    │  (constraint solving)
│ (solver.py)  │    │              │
└──────┬───────┘    └──────────────┘
       │
       ▼
┌──────────────┐
│ Google Cal   │  (httpx async)
│ (google_cal) │
└──────────────┘

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Quick Start

pip install aion-agent
aion login
aion

That's it. aion login opens your browser for Google sign-in. Your timezone is auto-detected. No API keys or configuration needed.

On first run, Aion offers to install Ollama for smarter natural language understanding — this is optional.

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Installation

From PyPI:

pip install aion-agent

From source:

git clone https://github.com/sheikhmunim/Aion.git
cd Aion
pip install -e .

Requires Python 3.10+.

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Usage

Start the interactive CLI:

aion

Commands

Action	Examples
Schedule	schedule gym tomorrow morning, add meeting at 3pm for 90 min
List	what's on today?, show my calendar this week, what tomorrow?
Delete	cancel gym tomorrow, delete meeting
Update	move gym to 3pm, reschedule meeting to friday
Free slots	when am I free tomorrow?, free slots this week
Best time	best time for a 2h study session
Preferences	preferences — manage blocked times and defaults
Login/Logout	login, logout
Help	help
Quit	quit or exit

Preferences

Block recurring time slots and set defaults:

aion > preferences
  ┌─────────────────────────────────────────────┐
  │ 1. Add a blocked time slot                  │
  │ 2. Remove a blocked slot                    │
  │ 3. Change default time preference           │
  │ 4. Back                                     │
  └─────────────────────────────────────────────┘

Blocked slots (e.g. lunch 12:00-13:00 on weekdays) are respected by the scheduler — it won't suggest times during those windows.

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Configuration

Config lives at ~/.aion/config.json. All options can also be set via environment variables with AION_ prefix.

Key	Env var	Default	Description
google_client_id	AION_GOOGLE_CLIENT_ID	Built-in	OAuth client ID (override with your own if needed)
google_client_secret	AION_GOOGLE_CLIENT_SECRET	Built-in	OAuth client secret
timezone	AION_TIMEZONE	UTC	IANA timezone (auto-detected on login)
default_duration	AION_DEFAULT_DURATION	60	Default event duration in minutes
ollama_url	AION_OLLAMA_URL	http://localhost:11434	Ollama server URL
ollama_model	AION_OLLAMA_MODEL	qwen2.5:0.5b	Ollama model for NLU

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Development

# Install with dev dependencies
pip install -e ".[dev]"

# Run tests
pytest tests/ -v

# Lint
ruff check aion/

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How it works

1. Intent classification — Regex patterns match commands (schedule, list, delete, etc.) with confidence scores. Falls back to Ollama LLM for ambiguous input.

2. Date parsing — Handles "today", "tomorrow", weekday names, "this/next week", specific dates like "March 5th", and common typos.

3. Constraint solving — The ASP/Clingo solver models the day as 30-minute slots (6AM-10PM), marks busy times from existing events and user preferences, then finds optimal placements with time-of-day preferences.

4. Google Calendar API — All reads/writes go through Calendar API v3 via httpx async. Token refresh is automatic.

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Dependencies

Package	Purpose
clingo	ASP constraint solver
httpx	Async HTTP client (Google Calendar + Ollama)
rich	Terminal UI

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Privacy

Aion runs entirely on your machine. No calendar data is sent to external servers. See PRIVACY.md for details.

License

MIT License. See LICENSE.