Feature request: support recurrence/repeat when creating todos

[benjibradley]

The add_todo tool currently supports when, deadline, tags, checklist_items, etc. — but there's no way to set a repeating schedule (e.g. "every Tuesday and Friday").

Things 3 supports recurrence via its URL scheme (repeat-method parameter in things:///add) and AppleScript (repetition rule). Adding a repeat parameter to add_todo (and optionally update_todo) would close this gap.

Suggested parameter: repeat — string, e.g. "daily", "weekly", "every 2 weeks", "monthly", matching Things 3's internal repeat options.

Use case: Creating recurring tasks programmatically (e.g. a twice-weekly "triage open browser tabs" habit task) currently requires manual setup in the Things 3 app after the MCP creates the todo.

[fwahl711]

I dug into this while working through the open issues and want to flag what I found, in case it helps anyone evaluating.

The URL scheme has no recurrence support. I checked Cultured Code's official URL scheme documentation — there's no repeat-method, repetition, or any recurrence-related parameter on add, add-project, update, or update-project. The newer json command's schema also doesn't expose any repetition fields on to-do / project / heading / checklist-item types. The docs do mention recurrence in passing ("this field cannot be updated on repeating to-dos"), but only to limit what other parameters do — never to create or configure a repeating rule.

AppleScript doesn't help either. Things' AppleScript dictionary exposes repetition rule on tasks, but it's read-only in current versions — you can inspect whether a task repeats, but not set the rule.

So as of today, programmatic creation of a repeating to-do isn't possible through any of Things' public APIs; the only path is the in-app UI. That means this can't be implemented at the MCP layer without an upstream change from Cultured Code.

(Just leaving evidence here so the issue isn't accidentally treated as a missing-feature in the MCP rather than an upstream limitation.)