events: reminders + digests from the agenda + 14 tests

reminders.sx bridges calendar + durable rosters to notify: ev/occurrence-
reminders (one per booked attendee, fires lead before start, idempotency key
occ-key/recipient/lead), ev/agenda-reminders (sorted by fire-at),
ev/due-reminders (fire-at <= now), ev/reminder->msg (notify wire shape),
ev/agenda-digest + ev/agenda-for-p. 196/196 green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

plans/events-on-sx.md

@@ -18,7 +18,7 @@ capacity rules, transactional booking, and a flow-driven notification dispatcher
 
 ## Status (rolling)
 
-`bash lib/events/conformance.sh` → **182/182** (Phases 1-2 + Phase 3 notification delivery flows)
+`bash lib/events/conformance.sh` → **196/196** (Phases 1-2 + Phase 3: notification flows + reminders)
 
 ## Ground rules
 
@@ -73,7 +73,7 @@ lib/events/api.sx ── (events/schedule) (events/book) (events/agenda) ──
 - [x] `notify.sx` — reminder/digest flows over injected transport
 - [x] retry/backoff on transport failure (flow suspend/resume)
 - [x] tests: delivery success, retry path, idempotent re-send
-- [ ] wire reminders to occurrences (schedule "starts in 1h" from agenda)
+- [x] wire reminders to occurrences (`reminders.sx` — derive from agenda + roster)
 - [ ] NOTE: shared with `feed/notify` — candidate for later extraction to a
   `delivery-on-sx` once a second consumer is real. **Delivery core
   (request→dispatch→resume, idempotent, bounded retry) is the extraction seam.**
@@ -84,6 +84,14 @@ lib/events/api.sx ── (events/schedule) (events/book) (events/agenda) ──
 
 ## Progress log
 
+- 2026-06-07 — Reminders + digests from the agenda. `reminders.sx` bridges
+  calendar + durable rosters to notify: `ev/occurrence-reminders` (one per
+  booked attendee, fires `lead` before start, idempotency key
+  occ-key/recipient/lead), `ev/agenda-reminders` (window-wide, sorted by
+  fire-at), `ev/due-reminders` (fire-at ≤ now — the scheduler query),
+  `ev/reminder->msg` (projects to notify's (id recipient body) shape),
+  `ev/agenda-digest` + `ev/agenda-for-p` (an actor's upcoming booked
+  occurrences). +14 tests, 196/196 green.
 - 2026-06-07 — **Phase 3 start: notification delivery flows.** `notify.sx`:
   reminders + digests as durable `flow`s over an INJECTED transport (the host
   `dispatch`). A flow `request`s delivery (suspend), the host sends and resumes