events: end-to-end delivery pipeline (derivation -> notify flow) + 8 tests

ev/deliver-messages bridges SX notification messages to the Scheme notify
flow: each (id recipient body) is serialized to s-expr text, spliced as quoted
data into the digest-flow program, delivered over an injected transport, and
results unboxed. Integration suite drives all three derivations (reminders /
booking-notify / reschedule) through delivery end to end; empty batch guarded
(empty digest completes without suspending). 303/303 green.

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

lib/events/conformance.conf

@@ -57,4 +57,5 @@ SUITES=(
   "notify:lib/events/tests/notify.sx:(ev-notify-tests-run!)"
   "reminders:lib/events/tests/reminders.sx:(ev-reminders-tests-run!)"
   "federation:lib/events/tests/federation.sx:(ev-federation-tests-run!)"
+  "integration:lib/events/tests/integration.sx:(ev-integration-tests-run!)"
 )

lib/events/notify.sx

@@ -36,3 +36,62 @@
 (define
   ev/notify-run
   (fn (prog) (flow-run (str ev-notify-flows-src "\n" prog))))
+
+;; ---- end-to-end delivery: SX messages -> the notify flow ----
+;; Bridges the SX notification-derivation modules (reminders / booking-notify /
+;; reschedule) to the durable delivery flow. An SX message (id recipient body)
+;; is serialized to s-expression text and spliced into the Scheme program as
+;; quoted data, then the digest flow delivers the batch over an injected
+;; transport. Strings round-trip through the guest Scheme as {:scm-string ...}
+;; boxes; results are unboxed back to plain SX.
+
+;; A default transport (Scheme source): always reports delivered.
+(define ev-notify-ok-transport "(lambda (k p) (list (quote ok) (quote sent)))")
+
+(define
+  ev-notify-join
+  (fn
+    (parts sep)
+    (if
+      (empty? parts)
+      ""
+      (reduce (fn (acc p) (str acc sep p)) (first parts) (rest parts)))))
+
+(define ev-msg->quoted (fn (m) (str "(quote " (serialize m) ")")))
+
+(define
+  ev-msgs->scheme
+  (fn
+    (msgs)
+    (str "(list " (ev-notify-join (map ev-msg->quoted msgs) " ") ")")))
+
+(define
+  ev-unbox-str
+  (fn
+    (x)
+    (if (and (dict? x) (has-key? x :scm-string)) (get x :scm-string) x)))
+
+(define
+  ev-unbox-result
+  (fn (r) (map (fn (item) (map ev-unbox-str item)) r)))
+
+;; Deliver a list of SX messages through the digest flow over `transport-src`
+;; (a Scheme (kind payload) -> (ok ..)|(retry reason) lambda source). `maxn`
+;; bounds retries per message, `maxticks` bounds host service ticks. Returns the
+;; per-message outcomes unboxed: (("delivered"|"failed" <id> <n-or-reason>) ...)
+(define
+  ev/deliver-messages
+  (fn
+    (msgs transport-src maxn maxticks)
+    (ev-unbox-result
+      (ev/notify-run
+        (str
+          "(define msgs "
+          (ev-msgs->scheme msgs)
+          ") (if (null? msgs) (list) (let ((s (flow/start (ev-deliver-digest "
+          maxn
+          ") msgs))) (begin (flow-run-host "
+          transport-src
+          " "
+          maxticks
+          ") (flow/result (car (cdr s))))))")))))

lib/events/scoreboard.json

@@ -1,8 +1,8 @@
 {
   "lang": "events",
-  "total_passed": 295,
+  "total_passed": 303,
   "total_failed": 0,
-  "total": 295,
+  "total": 303,
   "suites": [
     {"name":"calendar","passed":51,"failed":0,"total":51},
     {"name":"timezone","passed":17,"failed":0,"total":17},
@@ -13,7 +13,8 @@
     {"name":"ticket","passed":31,"failed":0,"total":31},
     {"name":"notify","passed":7,"failed":0,"total":7},
     {"name":"reminders","passed":21,"failed":0,"total":21},
-    {"name":"federation","passed":29,"failed":0,"total":29}
+    {"name":"federation","passed":29,"failed":0,"total":29},
+    {"name":"integration","passed":8,"failed":0,"total":8}
   ],
-  "generated": "2026-06-07T09:30:28+00:00"
+  "generated": "2026-06-07T11:51:43+00:00"
 }

lib/events/scoreboard.md

@@ -1,6 +1,6 @@
 # events scoreboard
 
-**295 / 295 passing** (0 failure(s)).
+**303 / 303 passing** (0 failure(s)).
 
 | Suite | Passed | Total | Status |
 |-------|--------|-------|--------|
@@ -14,3 +14,4 @@
 | notify | 7 | 7 | ok |
 | reminders | 21 | 21 | ok |
 | federation | 29 | 29 | ok |
+| integration | 8 | 8 | ok |

lib/events/tests/integration.sx

@@ -0,0 +1,144 @@
+;; lib/events/tests/integration.sx — end-to-end pipeline: derive notification
+;; messages (SX) -> deliver them through the durable notify flow (Scheme).
+
+(define ev-it-pass 0)
+(define ev-it-fail 0)
+(define ev-it-failures (list))
+
+(define
+  ev-it-check!
+  (fn
+    (name got expected)
+    (if
+      (= got expected)
+      (set! ev-it-pass (+ ev-it-pass 1))
+      (do
+        (set! ev-it-fail (+ ev-it-fail 1))
+        (append!
+          ev-it-failures
+          (str name "\n    expected: " expected "\n    got:      " got))))))
+
+(define ev-it-status (fn (outcome) (first outcome)))
+(define ev-it-id (fn (outcome) (first (rest outcome))))
+
+;; A store with a weekly class; nia + ola booked into the first occurrence.
+(define
+  ev-it-setup
+  (fn
+    (b)
+    (let
+      ((store (ev/schedule (ev/empty) (quote yoga) (ev-dt 2026 6 1 18 0) 60 {:freq :weekly :count 4 :byday (list 0 2)} 20)))
+      (let
+        ((occ1 (ev-occ (quote yoga) (ev-dt 2026 6 1 18 0) 60)))
+        (do
+          (ev/book-occ! b store (quote nia) occ1)
+          (ev/book-occ! b store (quote ola) occ1)
+          store)))))
+
+(define
+  ev-it-run-all!
+  (fn
+    ()
+    (do
+      (let
+        ((b (persist/open)))
+        (let
+          ((store (ev-it-setup b)))
+          (let
+            ((reminders (ev/agenda-reminders b store (ev-date 2026 6 1) (ev-date 2026 7 1) 60)))
+            (let
+              ((msgs (map ev/reminder->msg reminders))
+                (outcomes
+                  (ev/deliver-messages
+                    (map ev/reminder->msg reminders)
+                    ev-notify-ok-transport
+                    3
+                    20)))
+              (do
+                (ev-it-check!
+                  "every booked attendee's reminder is delivered"
+                  (map ev-it-status outcomes)
+                  (list "delivered" "delivered"))
+                (ev-it-check!
+                  "one delivery per derived reminder"
+                  (len outcomes)
+                  (len msgs))
+                (ev-it-check!
+                  "delivered ids match the reminder idempotency keys"
+                  (map ev-it-id outcomes)
+                  (map (fn (r) (get r :id)) reminders)))))))
+      (let
+        ((b (persist/open)))
+        (let
+          ((store (ev-it-setup b)))
+          (let
+            ((msgs (map ev/reminder->msg (ev/agenda-reminders b store (ev-date 2026 6 1) (ev-date 2026 7 1) 60))))
+            (ev-it-check!
+              "a permanently-failing transport reports failed deliveries"
+              (map
+                ev-it-status
+                (ev/deliver-messages
+                  msgs
+                  "(lambda (k p) (list (quote retry) (quote down)))"
+                  2
+                  20))
+              (list "failed" "failed")))))
+      (let
+        ((b (persist/open)))
+        (do
+          (ev/book! b "occ" 1 (quote nia))
+          (ev/waitlist! b "occ" 1 (quote ola))
+          (ev/cancel-promote! b "occ" 1 (quote nia))
+          (let
+            ((promoted (ev/notify-of-kind (ev/booking-notifications b "occ" (quote yoga)) :promoted)))
+            (let
+              ((outcomes (ev/deliver-messages (map ev/booking-notify->msg promoted) ev-notify-ok-transport 3 12)))
+              (do
+                (ev-it-check!
+                  "the waitlist-promotion notification is delivered"
+                  (map ev-it-status outcomes)
+                  (list "delivered"))
+                (ev-it-check!
+                  "exactly one promotion was delivered"
+                  (len outcomes)
+                  1))))))
+      (let
+        ((b (persist/open)))
+        (let
+          ((ev (ev-event (quote yoga) (ev-dt 2026 6 1 18 0) 60 {:freq :daily :count 3} 20)))
+          (do
+            (ev/book-occ!
+              b
+              (ev/add-event (ev/empty) ev)
+              (quote nia)
+              (ev-occ
+                (quote yoga)
+                (ev-dt 2026 6 2 18 0)
+                60))
+            (let
+              ((moved (ev-with-override ev (ev-dt 2026 6 2 18 0) (ev-dt 2026 6 2 20 0) 60)))
+              (let
+                ((outcomes (ev/deliver-messages (map ev/reschedule-notify->msg (ev/reschedule-notifications b moved)) ev-notify-ok-transport 3 12)))
+                (ev-it-check!
+                  "the reschedule notice is delivered to the booked attendee"
+                  (map ev-it-status outcomes)
+                  (list "delivered")))))))
+      (ev-it-check!
+        "delivering no messages yields no outcomes"
+        (ev/deliver-messages
+          (list)
+          ev-notify-ok-transport
+          3
+          12)
+        (list)))))
+
+(define
+  ev-integration-tests-run!
+  (fn
+    ()
+    (do
+      (set! ev-it-pass 0)
+      (set! ev-it-fail 0)
+      (set! ev-it-failures (list))
+      (ev-it-run-all!)
+      {:failures ev-it-failures :total (+ ev-it-pass ev-it-fail) :passed ev-it-pass :failed ev-it-fail})))

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` → **295/295** (Phases 1-4 + 8 ext: fed f/b, waitlist, EXDATE/RDATE, overrides, booking/reschedule-notify, fed transport, timezones+DST)
+`bash lib/events/conformance.sh` → **303/303** (Phases 1-4 + 9 ext: fed f/b, waitlist, EXDATE/RDATE, overrides, booking/reschedule-notify, fed transport, timezones+DST, e2e delivery pipeline)
 
 ## Ground rules
 
@@ -74,6 +74,8 @@ lib/events/api.sx ── (events/schedule) (events/book) (events/agenda) ──
 - [x] retry/backoff on transport failure (flow suspend/resume)
 - [x] tests: delivery success, retry path, idempotent re-send
 - [x] wire reminders to occurrences (`reminders.sx` — derive from agenda + roster)
+- [x] end-to-end pipeline: derive (reminders/booking/reschedule) → deliver via
+  the notify flow (`ev/deliver-messages`, SX→Scheme bridge)
 - [ ] 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.**
@@ -86,6 +88,16 @@ lib/events/api.sx ── (events/schedule) (events/book) (events/agenda) ──
 
 ## Progress log
 
+- 2026-06-07 — End-to-end delivery pipeline (closes the derivation↔delivery
+  gap). `ev/deliver-messages` bridges SX notification messages to the Scheme
+  notify flow: each (id recipient body) is `serialize`d to s-expression text,
+  spliced as quoted data into the digest-flow program, delivered over an
+  injected transport-src, and results unboxed ({:scm-string}→str). New
+  integration suite drives all three derivations through delivery: reminders →
+  delivered (ids = idempotency keys), transient-fail transport → failed,
+  waitlist-promotion notification → delivered, reschedule notice → delivered,
+  empty batch → empty (guarded: an empty digest completes without suspending).
+  +8 tests, 303/303 green.
 - 2026-06-07 — Timezone + DST support (user request). `timezone.sx`: a tz maps
   wall-clock LOCAL ↔ absolute UTC (offset = local-utc). :fixed (constant) and
   :dst (std/dst offsets + two UTC transition rules, e.g. EU last-Sun-Mar/Oct