taskseed

Recurring CalDAV tasks that actually work.

taskseed injects recurring tasks into your CalDAV task list, so every client sees upcoming tasks (VTODOs).

   

✨ Why taskseed?

Recurring VTODO tasks are handled inconsistently across CalDAV clients. Some ignore recurrence rules entirely.

taskseed avoids this by expanding recurring tasks on the server side. Instead of relying on clients to interpret recurrence metadata, it materializes upcoming tasks as concrete VTODO entries.

🧠 How it works

• You declare your recurring tasks once in a simple configuration file
• taskseed runs on the server and regularly generates upcoming task instances (VTODO items)
• Each occurrence is written as a normal, single task into your CalDAV task list
• Your apps simply show upcoming tasks; no special support or setup for recurrence required

🚀 Installation

Install directly via Go

go install github.com/eikendev/taskseed/cmd/taskseed@latest

Download pre-built release

Grab the latest release binary for your platform from the GitHub Releases page.

📄 Usage

⚙ Configuration

Find below an example YAML file. By default, we read config.yaml from the current working directory; override with --config or TASKSEED_CONFIG.

For credentials, set the environment variables TASKSEED_CALDAV_USERNAME and TASKSEED_CALDAV_PASSWORD.

Important

Rule IDs must be stable over time. taskseed uses the rule ID to derive a deterministic instance ID (X-TASKSEED-ID) for each occurrence. If you change a rule ID, taskseed treats it as a brand-new rule and will create a new series of tasks, leaving the old series behind.

server:
  # Base CalDAV endpoint (required)
  url: https://cal.example.com/remote.php/dav

target:
  # Full URL to the target task list (required)
  url: https://cal.example.com/dav/calendars/user/tasks/

sync:
  # How far into the future to materialize tasks (required; > 0)
  horizonDays: 365
  # How far into the past to scan for existing tasks (required; > 0)
  lookbackDays: 7

defaults:
  # IANA timezone for task generation (optional; default: UTC)
  timezone: UTC
  due:
    # Due time for created tasks (optional; 24h HH:MM)
    time: "09:00"
    # If true, write due dates as date-only values (optional; default: false)
    dateOnly: false

rules:
  # Each rule defines one recurring task (required)
  - id: water_plants
    # Stable identifier used for deduplication (required; unique)
    title: Water the houseplants
    # Task description (optional)
    notes: "Check top inch of soil; skip if still moist."
    schedule:
      kind: weekly
      # Runs on specific weekdays each week.
      # List of weekdays to include (required for weekly)
      weekdays: [monday, thursday]

  - id: take_vitamins
    title: Take vitamins
    schedule:
      # Runs every N days from the first occurrence.
      # Integer interval in days (required)
      kind: every_n_days
      everyNDays: 2

  - id: change_sheets
    title: Change bedsheets
    schedule:
      # Runs on specific days of the month.
      # List of month days (required; 1–31)
      kind: monthly_day
      monthDays: [1]

  - id: call_parents
    title: Call parents
    schedule:
      # Runs on the Nth weekday of each month.
      # Occurrence number in the month (required)
      # Weekday name (required)
      kind: monthly_nth_weekday
      nth: 1
      nthWeekday: sunday

  - id: renew_subscription
    title: Renew subscriptions
    schedule:
      # Runs on a specific month/day each year.
      # Month number (required; 1–12)
      # Day of month (required; 1–31)
      kind: yearly_date
      month: 12
      day: 1

  - id: dental_checkup
    title: Schedule dental checkup
    schedule:
      # Runs on the Nth weekday of a specific month.
      # Month number (required; 1–12)
      # Occurrence number in the month (required)
      # Weekday name (required)
      kind: yearly_nth_weekday
      month: 6
      nth: 2
      yearlyNthWeekday: monday

Run

taskseed sync

Run in dry-run mode to see what would happen without making changes:

taskseed sync --dry-run

Increase logging verbosity:

taskseed sync --verbose

Use a different configuration file:

taskseed sync --config /path/to/config.yaml

Validate configuration and connectivity:

taskseed doctor