feat(coordinator): profile discovery — publish yours, add theirs in one tap

Carrier is the existing kind-0 'cordn' field (app convention, NIP.md) — no new
kind. It now holds a coordinator *pointer* rather than only a URL.

- EditProfileForm: accepts nprofile / cordn.net link / npub / hex / http URL,
  validates via parseCoordinatorInput, normalises a bare pointer to Cordn's
  canonical add-link on save, and adds 'Use my coordinator'. Label -> Coordinator.
- NIP19Page: when the profile's cordn value parses as a pointer, render a
  Coordinator row with a one-tap Add (sets the viewer's coordinator, with toast)
  and an 'Open in Cordn' link; otherwise keep the old plain-link row.
- NIP.md: document the broadened cordn field (pointer formats + one-tap add).
- smoke test: now boots a real profile route too.

AGENTS.md

@@ -596,6 +596,14 @@ session with **no other memory of this project**. So:
   phone-hosting story belongs to Cordn's own app. ⚠️ `CORDN_APP_URL` currently
   points at `cordn.net`; the exact Android-app deep link is unconfirmed — fill
   it in when known.
+  **Profile discovery (built 2026-09-29):** the carrier is the existing kind-0
+  **`cordn`** field (app convention, documented in NIP.md — not a new kind).
+  `EditProfileForm` accepts a pointer (nprofile / cordn.net link / npub / hex /
+  http URL), **normalises a bare pointer to Cordn's canonical add-link** before
+  saving (`coordinatorAddUrl`), and has **"Use my coordinator"**. `NIP19Page`
+  renders it as a **Coordinator** row with a one-tap **Add** (sets the viewer's
+  `useCoordinator`, with toast) plus an "Open in Cordn" link — falling back to
+  the old plain-link row when the value doesn't parse.
   **⚠️ Crew-level Cordn chat ALREADY EXISTS — do NOT rebuild it
   (2026-09-29):** `src/lib/cordn/{client,crypto,endpoint,types}.ts` +
   `useCordnChat.ts` + `CrewChat.tsx` + `crew/CrewCoordinatorCard.tsx`, driven by
@@ -608,7 +616,7 @@ session with **no other memory of this project**. So:
   Cordn's phone app (an nprofile, not a URL) was un-enterable — `CrewForm` now
   uses the shared `parseCrewCoordinatorInput` / `crewCoordinatorInputValue`
   (`lib/coordinator.ts`) and has a **"Use my coordinator"** button that prefills
-  from Settings → Coordinator. **Still future:** profile discovery, and real MLS
+  from Settings → Coordinator. **Still future:** real MLS
   (`ts-mls`) instead of group-key crypto. **Lesson: grep `src` for the feature
   before building it — this was nearly duplicated.**
 - **Empty-map nudge (2026-09-28):** `MapPage` distinguishes the two empties — the

NIP.md

@@ -14,7 +14,7 @@ other clients, and preserved on edit:
 | `noffer` | string | CLINK Offer code (`noffer1…`) — self-custodial Bitcoin tip code. |
 | `bitcoin_silent_payment` | string | Bitcoin Silent Payment address (BIP-352, `sp1…`) — a reusable, private on-chain address. |
 | `sponsors` | string | Freeform highlight of the skater's sponsors / supporters (brands, shops, people). |
-| `cordn` | string | A Cordn (cordn.net) contact URL for private, end-to-end encrypted messaging via a self-hosted coordinator. |
+| `cordn` | string | The **Cordn coordinator** others use to reach you — private, end-to-end encrypted messaging. Holds a coordinator **pointer**: either an `nprofile` (coordinator pubkey + relay hints), Cordn's canonical `https://cordn.net/chat/coordinators?c=<nprofile>` add-link, or an `http(s)` endpoint URL. This is the discovery field: clients SHOULD offer a one-tap **add** when it parses as a pointer, and otherwise open it as a plain link. See *Private Crew Chat (Cordn / MLS)*. |
 | `cashu_escrow` | string | Cashu escrow pubkey (33-byte compressed secp256k1 hex, `02…`) used as the P2PK lock target for marketplace escrow. Derived from the Cashu wallet keyring. See `ESCROW.md`. |
 
 `lud16` (Lightning address) is standard NIP-01 but is also editable directly in

scripts/smoke-test.mjs

@@ -138,6 +138,7 @@ const ROUTES = [
   '/settings',
   '/settings?section=profile',
   '/settings?section=coordinator',
+  '/npub1yrnuj56rnen08zp2h9h7p74ghgjx6ma39spmpj6w9hzxywutevsst7k5cx',
   '/stash',
   '/collections',
   '/stats',

src/components/EditProfileForm.tsx

@@ -5,6 +5,8 @@ import { useCurrentUser } from '@/hooks/useCurrentUser';
 import { useNostrPublish } from '@/hooks/useNostrPublish';
 import { useToast } from '@/hooks/useToast';
 import { Button } from '@/components/ui/button';
+import { useCoordinator } from '@/hooks/useCoordinator';
+import { coordinatorAddUrl, parseCoordinatorInput } from '@/lib/coordinator';
 import {
   Form,
   FormControl,
@@ -18,7 +20,7 @@ import { Input } from '@/components/ui/input';
 import { Textarea } from '@/components/ui/textarea';
 import { Switch } from '@/components/ui/switch';
 import { Label } from '@/components/ui/label';
-import { Loader2, Upload, Zap, ShieldCheck, AlertCircle, Bitcoin, Award, MessageSquareLock, UserRound, X, Plus, Bot, BadgeCheck, HelpCircle } from 'lucide-react';
+import { Loader2, Upload, Zap, ShieldCheck, AlertCircle, Bitcoin, Award, MessageSquareLock, UserRound, X, Plus, Bot, BadgeCheck, HelpCircle, Server } from 'lucide-react';
 import { NSchema as n, type NostrMetadata } from '@nostrify/nostrify';
 import { useQueryClient } from '@tanstack/react-query';
 import { useUploadFile } from '@/hooks/useUploadFile';
@@ -62,11 +64,15 @@ export const EditProfileForm: React.FC = () => {
   ]);
 
   // Cordn contact link — private (MLS-encrypted) group messaging you can own.
-  // A URL others can use to reach out to you on Cordn (cordn.net).
+  // The coordinator others can use to message you on Cordn. Accepts the same
+  // pointer formats as Settings → Coordinator (nprofile / cordn.net link /
+  // npub / hex) as well as an http(s) URL — this is the discovery field.
   const [cordn, setCordn] = useState('');
   const cordnTrimmed = cordn.trim();
+  const cordnParsed = cordnTrimmed ? parseCoordinatorInput(cordnTrimmed) : null;
   const cordnInvalid =
-    cordnTrimmed.length > 0 && !/^https?:\/\/.+/i.test(cordnTrimmed);
+    cordnTrimmed.length > 0 && !cordnParsed && !/^https?:\/\/.+/i.test(cordnTrimmed);
+  const { coordinator: myCoordinator } = useCoordinator();
 
   // Initialize the form with default values
   const form = useForm<NostrMetadata>({
@@ -230,7 +236,10 @@ export const EditProfileForm: React.FC = () => {
 
       // Cordn contact link (custom field).
       if (cordnTrimmed) {
-        data.cordn = cordnTrimmed;
+        // Normalise a bare pointer (nprofile/npub/hex) to Cordn's canonical
+        // add-link, so the profile carries a human-clickable URL other clients
+        // can parse back. A plain http(s) URL is stored as-is.
+        data.cordn = cordnParsed ? coordinatorAddUrl(cordnParsed) : cordnTrimmed;
       } else {
         delete data.cordn;
       }
@@ -512,21 +521,35 @@ export const EditProfileForm: React.FC = () => {
             </p>
           </div>
 
-          {/* Cordn contact link */}
+          {/* Cordn coordinator — the pointer others discover you by. */}
           <FieldRow
             id="profile-cordn"
             icon={<MessageSquareLock className="h-4 w-4" />}
             iconClass="text-teal-500 bg-teal-500/10"
-            label="Cordn contact link"
+            label="Coordinator"
             value={cordn}
             onChange={setCordn}
-            placeholder="https://cordn.net/…"
+            placeholder="nprofile1…  ·  cordn.net/chat/coordinators?c=…  ·  https://…"
             status={
               cordnInvalid
-                ? { kind: 'error', text: 'Paste a full link starting with https://.' }
+                ? { kind: 'error', text: "That doesn't look like a coordinator. Paste an nprofile, a cordn.net link, or an https:// URL." }
-                : { kind: 'hint', text: 'A link others use to reach you on Cordn — private, encrypted messaging you own.' }
+                : cordnTrimmed
+                  ? { kind: 'ok', text: 'Shown on your profile — others can add it in one tap.' }
+                  : { kind: 'hint', text: 'The Cordn coordinator others use to message you. Private, encrypted, yours.' }
             }
           />
+          {myCoordinator && (
+            <Button
+              type="button"
+              variant="outline"
+              size="sm"
+              className="border-teal-500/40 text-teal-600 hover:bg-teal-500/10 dark:text-teal-400"
+              onClick={() => setCordn(coordinatorAddUrl(myCoordinator))}
+            >
+              <Server className="mr-1.5 h-3.5 w-3.5" />
+              Use my coordinator
+            </Button>
+          )}
         </FormSection>
 
         {/* ── Section: Account ── */}

src/pages/NIP19Page.tsx

@@ -20,13 +20,16 @@ import { useUserCrews } from '@/hooks/useCrews';
 import { useUserPublicStash } from '@/hooks/useStashShowcase';
 import { useUserSkaterProfile } from '@/hooks/useSkaters';
 import { useCrewNip05 } from '@/hooks/useCrewNip05';
+import { useCoordinator } from '@/hooks/useCoordinator';
+import { coordinatorAddUrl, parseCoordinatorInput, shortNpub, CORDN_RELAY_URL } from '@/lib/coordinator';
+import { toast } from '@/hooks/useToast';
 import { SpotCard, SpotCardSkeleton } from '@/components/SpotCard';
 import { genUserName } from '@/lib/genUserName';
 import { cn } from '@/lib/utils';
 import { SKATER_STANCES, SKATER_STYLES, SKATER_LEVELS, NEWSLETTER_KIND } from '@/lib/types';
 import { NewsletterIssueView } from '@/components/NewsletterIssueView';
 import NotFound from './NotFound';
-import { MapPin, Store, MessageCircle, Globe, Zap, ExternalLink, Copy, Check, ShieldCheck, Instagram, Share2, Users, Crown, Bot, Pencil, Package, Tag, ArrowRightLeft, Bitcoin, Award, MessageSquareLock, PersonStanding, Sparkles, Home, Clock } from 'lucide-react';
+import { MapPin, Store, MessageCircle, Globe, Zap, ExternalLink, Copy, Check, ShieldCheck, Instagram, Share2, Users, Crown, Bot, Pencil, Package, Tag, ArrowRightLeft, Bitcoin, Award, MessageSquareLock, PersonStanding, Sparkles, Home, Clock, Server, Plus } from 'lucide-react';
 import { useState, type ReactNode } from 'react';
 import { UserStatusIndicator } from '@/components/UserStatusIndicator';
 import { ShareProfileDialog } from '@/components/ShareProfileDialog';
@@ -107,6 +110,7 @@ function StatPill({
 function ProfilePage({ pubkey }: { pubkey: string }) {
   const author = useAuthor(pubkey);
   const { user } = useCurrentUser();
+  const { coordinator: myCoordinator, setCoordinator } = useCoordinator();
   const { data: spots, isLoading: spotsLoading } = useUserSkateSpots(pubkey);
   const { data: shops, isLoading: shopsLoading } = useUserShops(pubkey);
   const { memberships: crews, isLoading: crewsLoading } = useUserCrews(pubkey);
@@ -134,6 +138,9 @@ function ProfilePage({ pubkey }: { pubkey: string }) {
   const silentPayment = typeof raw?.bitcoin_silent_payment === 'string' ? raw.bitcoin_silent_payment : undefined;
   const userBadges = parseBadges(metadata);
   const cordnUrl = typeof raw?.cordn === 'string' ? raw.cordn : undefined;
+  // When the profile's `cordn` value is a coordinator pointer, we can offer a
+  // one-tap "Add" instead of just a link.
+  const cordnPointer = cordnUrl ? parseCoordinatorInput(cordnUrl) : null;
   const [spCopied, setSpCopied] = useState(false);
   const [shareOpen, setShareOpen] = useState(false);
 
@@ -764,8 +771,43 @@ function ProfilePage({ pubkey }: { pubkey: string }) {
                   </button>
                 )}
 
-                {/* Cordn contact link */}
+                {/* Cordn coordinator — addable in one tap */}
-                {cordnUrl && (
+                {cordnPointer ? (
+                  <div className="flex items-center gap-3 p-3 rounded-lg bg-gray-900">
+                    <Server className="h-4 w-4 text-teal-400 flex-shrink-0" />
+                    <div className="min-w-0 flex-1">
+                      <p className="text-[10px] uppercase tracking-wide text-gray-500 font-bold">Coordinator</p>
+                      <span className="text-gray-300 text-sm truncate block font-mono">
+                        {shortNpub(cordnPointer.pubkey)}
+                      </span>
+                    </div>
+                    {!isOwnProfile && myCoordinator?.pubkey !== cordnPointer.pubkey && (
+                      <Button
+                        size="sm"
+                        variant="outline"
+                        className="flex-shrink-0 border-teal-500/40 text-teal-600 hover:bg-teal-500/10 dark:text-teal-400"
+                        onClick={() => {
+                          setCoordinator({
+                            pubkey: cordnPointer.pubkey,
+                            relays: cordnPointer.relays.length ? cordnPointer.relays : [CORDN_RELAY_URL],
+                          });
+                          toast({ title: 'Coordinator added', description: shortNpub(cordnPointer.pubkey) });
+                        }}
+                      >
+                        <Plus className="mr-1 h-3.5 w-3.5" /> Add
+                      </Button>
+                    )}
+                    <a
+                      href={coordinatorAddUrl(cordnPointer)}
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      className="flex-shrink-0 text-gray-500 transition-colors hover:text-teal-300"
+                      title="Open in Cordn"
+                    >
+                      <ExternalLink className="h-3.5 w-3.5" />
+                    </a>
+                  </div>
+                ) : cordnUrl ? (
                   <a
                     href={cordnUrl}
                     target="_blank"
@@ -779,7 +821,7 @@ function ProfilePage({ pubkey }: { pubkey: string }) {
                     </div>
                     <ExternalLink className="h-3 w-3 text-gray-500 ml-auto flex-shrink-0" />
                   </a>
-                )}
+                ) : null}
 
                 {/* Npub Copy */}
                 <button