v0.2.3: bump sigil-caldav to 0.10.1 for DST-aware recurrence

Message

Recurring CalDAV events tagged with TZID=Europe/Athens (or any tz) that were originally serialized when Athens was on standard time (EET=UTC+2) rendered with the wrong wall-clock during DST viewing (EEST=UTC+3). The renderer's underlying recurrence walker in sigil-caldav <= 0.10.0 advanced occurrences by 86400-second multiples in UTC, preserving the UTC instant across DST transitions and drifting the wall-clock by the DST shift.

Per RFC 5545, a TZID-tagged DTSTART anchors the wall-clock in that tz; each occurrence's UTC instant must be re-resolved per its actual fire date so the OS zoneinfo can apply the correct offset. sigil-caldav v0.10.1 implements this via add-days-in-tz / add-months-in-tz built on list->time-in-tz. Bureau picks up the fix transitively — no bureau-side renderer changes required.

Adds a regression test that mirrors the live CodeSignal Simulation event: weekly TZID=Europe/Athens master at 17:00 EET in winter, expanded to Apr 28 2026 (EEST), must produce 14:00 UTC (= 17:00 EEST wall-clock). Test passes under sigil >= 0.14.4 binaries; under the v0.14.3 test runner it fails because of unrelated time.c regressions (Bug 1/2 from sigil-lang v0.14.4's notes — fixed in the deployed bureau binary which statically links sigil-stdlib v0.14.7 through the refreshed lockfile).

sigil.lock: sigil-caldav 0.10.0 -> 0.10.1, sigil-stdlib v0.14.3 -> v0.14.7 (transitive auto-derive bump).

Changed

 package.sgl          |  4 ++--
 sigil.lock           | 23 +++++++++++------------
 test/test-bureau.sgl | 27 +++++++++++++++++++++++++++
 3 files changed, 40 insertions(+), 14 deletions(-)

Diff

package.sglmodified

@@ -5,7 +5,7 @@

(package

name: "bureau"

−8

version: "0.2.2"

version: "0.2.3"

sigil: "^0.14"

description: "MCP server for Fastmail email and calendar"

url: "https://codeberg.org/sigil/bureau"

@@ -42,7 +42,7 @@

(from-git url: "codeberg:sigil/sigil-log" version: "^0.14.0")

(from-git url: "codeberg:sigil/sigil-mcp" version: "^0.14.0")

(from-git url: "codeberg:sigil/sigil-jmap" version: "^0.9.1")

−45

(from-git url: "codeberg:sigil/sigil-caldav" version: "^0.9.1"))

+45

(from-git url: "codeberg:sigil/sigil-caldav" version: "^0.10.1"))

tasks: (list

(task

sigil.lockmodified

@@ -3,9 +3,9 @@

(package name: "sigil-stdlib"

url: "codeberg:sigil/sigil-lang"

ref: "^0.14"

−6

sha: "9f34f58f175fef93c1322ab3522e85eee2809450"

sha: "7739f35a54d2eb03e3e79ce1eb1eb366326a23db"

package-selector: "sigil-stdlib"

−8

version: "0.14.3")

version: "0.14.7")

(package name: "sigil-json"

url: "codeberg:sigil/sigil-json"

ref: "^0.14.0"

@@ -28,22 +28,21 @@

version: "0.9.1")

(package name: "sigil-caldav"

url: "codeberg:sigil/sigil-caldav"

−31

ref: "^0.9.1"

−32

sha: "24bd34009ba324f201dea3e9e7e221cceddae9fa"

−33

version: "0.9.1")

+31

ref: "^0.10.1"

+32

sha: "878f163835e1e4f3fcb38973861cb30eeafbb262"

+33

version: "0.10.1")

(package name: "sigil-http"

url: "codeberg:sigil/sigil"

ref: "^0.9.0"

sha: "0123d3fc7d2dd37e5c27e9fade7d11b817deb21a"

package-selector: "sigil-http")

(package name: "sigil-crypto"

−40

url: "codeberg:sigil/sigil"

−41

ref: "^0.9.0"

−42

sha: "0123d3fc7d2dd37e5c27e9fade7d11b817deb21a"

−43

package-selector: "sigil-crypto")

+40

url: "codeberg:sigil/sigil-crypto"

+41

ref: "^0.14.0"

+42

sha: "0123d3fc7d2dd37e5c27e9fade7d11b817deb21a")

(package name: "sigil-sxml"

url: "codeberg:sigil/sigil-sxml"

−46

ref: "^0.9.0"

−47

sha: "081b6337c28d2ae55cd7658002cd6bc5e79ea07b"

−48

version: "0.9.1")

+45

ref: "^0.14.0"

+46

sha: "a33eb522bfd485dcc490c8db5ea599d7215027ff"

+47

version: "0.14.0")

)

test/test-bureau.sglmodified

@@ -250,6 +250,33 @@

250

(assert-true (string-contains? result "Team standup"))

251

(assert-true (string-contains? result "Room 42")))))

252

+253

(test "TZID-tagged recurring event keeps wall-clock across DST"

+254

;; Regression for the CodeSignal Simulation/Team-coffee miscount.

+255

;; A weekly meeting with TZID=Europe/Athens and a winter master

+256

;; (17:00 EET = 15:00 UTC on Jan 13 2026) must render Apr 28's

+257

;; occurrence at 17:00 EEST (14:00 UTC), not 18:00 (the UTC-naive

+258

;; walker's drift) and not 16:00 (the EET-offset rendering of the

+259

;; correct UTC observed on the broken sigil-stdlib v0.14.3).

+260

(let* ((ics (string-append

+261

"BEGIN:VCALENDAR\r\nVERSION:2.0\r\nBEGIN:VEVENT\r\n"

+262

"UID:[email protected]\r\n"

+263

"DTSTART;TZID=Europe/Athens:20260113T170000\r\n"

+264

"DTEND;TZID=Europe/Athens:20260113T180000\r\n"

+265

"SUMMARY:Simulation - Estimation/Planning\r\n"

+266

"RRULE:FREQ=WEEKLY;BYDAY=TU\r\n"

+267

"END:VEVENT\r\nEND:VCALENDAR"))

+268

(master (car (ical-parse ics)))

+269

(range-start (parse-ical-datetime "20260428T000000Z"))

+270

(range-end (parse-ical-datetime "20260429T000000Z"))

+271

(occurrences (ical-expand-recurrence master

+272

start: range-start

+273

end: range-end)))

+274

(assert-equal 1 (length occurrences))

+275

;; 14:00 UTC is the wall-clock anchor 17:00 in EEST (UTC+3).

+276

(assert-equal "20260428T140000Z"

+277

(format-ical-datetime

+278

(ical-event-dtstart (car occurrences))))))

+279

280

(test "event without location"

281

(let* ((ts-start (parse-iso8601 "2026-03-14T14:00:00Z"))

282

(event (ical-event summary: "Focus time"