Cordn group chats: MLS groups delivered through a coordinator (Amethyst 1.17 interop)

src/contextvm.js speaks ContextVM (kind 25910 inside ephemeral gift wraps)
to a coordinator; src/cordn.js is the protocol (KeyPackages with hex-text
identities, the 0xC04D metadata extension, exporter-keyed ChaCha20 sealing,
unsigned nostr-shaped envelopes with the sender as MLS AAD, cordn1 group
refs, a record engine like marmot.js); src/cordn-client.js mirrors
marmot-client.js with the same interface, so the Messages group screens
drive both — New group gains a White Noise / Cordn toggle.

Verified against @cordn/cli (ts-mls) on the public coordinator both ways,
from the engine (tools/cordn-interop-test.js) and from the real app
(tools/cordn-ui-test.js). mls.js: the OpenMLS required_capabilities rule for
GroupContextExtensions now applies only to groups that carry one.

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01YRC6aKhwAud231ot9FPmhi

1 files changed, 6 insertions, 0 deletions

diff --git a/src/i18n.js b/src/i18n.js
index 1ff5baa..b82a2ac 100644
--- a/src/i18n.js
+++ b/src/i18n.js
@@ -514,6 +514,12 @@ const STR = {
     msgGroupAttachment: 'Attachment',
     msgGroupFailed: "Couldn't update the group. Try again",
     msgGroupSetup: 'Your signer is needed once to set up group chats',
+    msgGroupProto: 'Group type',
+    msgGroupProtoWn: 'White Noise',
+    msgGroupProtoCd: 'Cordn',
+    msgGroupProtoCdHint: 'Cordn groups work with Amethyst and the Cordn app; messages travel through a coordinator server that cannot read them.',
+    msgCordnInfo: 'Cordn group · end-to-end encrypted · delivered by a coordinator',
+    msgCordnNoFiles: 'Attachments are not available in Cordn groups yet',
     msgRouteTitle: 'Send messages by',
     msgRouteAuto: 'Automatic',
     msgRouteAutoHint: 'Reply the way they last wrote',