azos/dav

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Architecture

Phone (Apple Reminders) ↔ Nextcloud CalDAV ↔ vdirsyncer ↔ local vdir, with todoman (todo) as the CLI. Generic module: azos-core/suites/base/dav (azos.dav.*); lauretta's account in features/dav via home-manager's own accounts.calendar.accounts (same split as mail).
DAV todos are deliberately separate from org-roam project todos ("local vs dav", not "phone"). Moving a project todo to DAV = create on DAV with (project) prefix, delete locally. The todo / workplate skills handle DAV when azos-dav-sync is on PATH — no separate skill.
azos-dav-sync: YubiKey presence gate (exit 75 + last-sync time if absent) → discover → metasync → sync → regenerate a read-only org view (~/.local/share/azos-dav/todos.org, added to org-agenda via ~/.emacs.d/extra/azos-dav.el). Conflicts: server/phone wins.
Live since 2026-10-14 on lauretta: syncs Nextcloud lists aner and zakobar (todoman shows them as Aner / Zakobar); collections still "from a" (everything). Committed azos-core ba95691, azos b5c7d7d.
Calendar (events) sync + workplate reading today's schedule is the next step — tracked in azos/todos.

todoman 4.7: completing a recurring VTODO forks a new UID and drops DTSTART + VALARM (phone stops notifying). plann 1.2 / caldav-lib "safe" mode keeps UID but drifts the next occurrence to completion time and leaves absolute alarm triggers stale. Decision: recurring items are completed on the phone; skill forbids todo done on them. Stretch: inspect how Apple writes a completed recurrence, maybe fix todoman upstream (issues #304, #249).
todoman has no alarm support at all — timed tasks created from the computer won't ring on the phone.
todoman --porcelain gives epoch seconds; all-day vs local midnight is indistinguishable (org view treats midnight as date-only).
HM vdirsyncer names pairs calendar_<account>, a = remote; "remote wins" → "a wins".
vdirsyncer discover prompts per missing collection and aborts on closed stdin. Module pre-creates explicitly listed local collections and answers "n" (never creates lists on the server; typos fail loudly); answers "y" only for "from a". Runs every sync so new lists appear automatically.
ical2orgpy ignores VTODO (events only); no existing VTODO→org tool found, hence the small org-view.jq.
Test bed that worked: local Radicale (nix shell nixpkgs#radicale, auth type = none) + MKCALENDAR via curl.

Emacs command to mark a DAV item done from the org agenda/view (run todo done + azos-dav-sync); the org view is read-only by design until then.
See how Apple writes a completed recurring reminder (inspect real .ics after ticking one on the phone); if feasible, fix todoman's recurring completion upstream (#304, #249) so recurring items can be completed from the computer.
Pin collections in features/dav to the wanted lists instead of "from a" (currently only aner and zakobar exist, so no practical difference yet).
Check whether Reminders flags survive CalDAV (likely iCloud-only); priority (!/!!/!!!) is the known-working importance marker.
Alarms: todoman can't create them, so computer-created timed tasks don't ring — only fixable with custom code or an upstream todoman feature.