diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6746e40..a37dcbb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,14 @@ Versions before 0.8.0 are in the [git tags](https://github.com/WireCatLabs/cli-b
 Every entry says what changed as a caller sees it, why, and what to watch for — the rules are
 [`docs/dev/CONVENTIONS.md`](docs/dev/CONVENTIONS.md#the-changelog).
 
+## Unreleased
+
+### Added
+
+- **The flag vocabulary has `--conference <service>`** (role `value`, string): the video meeting service that gives a
+  calendar event a new meeting link, such as `google-meet`. cli-core's shared `events create|update` take it where the
+  calendar writer can make links; without the word, a CLI that mounts them fails its `option-role` lint.
+
 ## 0.101.0 — 14.11.2026
 
 ### Added
diff --git a/src/standards/flags-calendar.ts b/src/standards/flags-calendar.ts
index 932acd8..36f7fa8 100644
--- a/src/standards/flags-calendar.ts
+++ b/src/standards/flags-calendar.ts
@@ -31,6 +31,13 @@ export const CALENDAR_FLAGS: VocabularyFlag[] = [
     type: "string",
     meaning: "one of the service's own settings, such as a meeting's waiting room; repeat it for more",
   },
+  {
+    name: "--conference",
+    value: "<service>",
+    role: "value",
+    type: "string",
+    meaning: "the video meeting service that gives the event a new meeting link, such as google-meet",
+  },
   {
     name: "--id",
     value: "<id>",
diff --git a/src/standards/standards.test.ts b/src/standards/standards.test.ts
index 611505f..2404237 100644
--- a/src/standards/standards.test.ts
+++ b/src/standards/standards.test.ts
@@ -153,6 +153,14 @@ describe("vocabulary registry", () => {
     expect(flag("--source")?.replaces).toEqual(["--target-accounts"])
   })
 
+  it("gives an event a new meeting link with --conference <service> that a write sets", () => {
+    expect(VOCABULARY.flags.find((entry) => entry.name === "--conference")).toMatchObject({
+      value: "<service>",
+      role: "value",
+      type: "string",
+    })
+  })
+
   it("takes a service's own setting as a repeatable --setting <name=value> that a write sets", () => {
     expect(VOCABULARY.flags.find((entry) => entry.name === "--setting")).toMatchObject({
       value: "<name=value>",