docs: sync SKILL.md Organization row with README

PR #174 added longDescription and visibility to
app.certified.actor.organization and updated the README overview row,
but the matching row in SKILL.md was not updated. AGENTS.md requires
both files stay in sync so AI agents consuming the skill see the full
set of documented fields. Bring the SKILL.md Certified row in line
with README.md (legal structure, URLs, location, founding date,
optional long description, discoverability visibility).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: s-adamantine

.agents/skills/building-with-hypercerts-lexicons/SKILL.md

@@ -238,15 +238,15 @@ if (result.success) {
 
 ### Certified — shared lexicons
 
-| Lexicon              | NSID                               | Purpose                                                                         |
-| -------------------- | ---------------------------------- | ------------------------------------------------------------------------------- |
-| **Location**         | `app.certified.location`           | Geographic reference via [Location Protocol](https://spec.decentralizedgeo.org) |
-| **Profile**          | `app.certified.actor.profile`      | User profile: display name, bio, avatar, banner                                 |
-| **Organization**     | `app.certified.actor.organization` | Organization metadata: legal structure, URLs, location                          |
-| **Badge Definition** | `app.certified.badge.definition`   | Defines a badge with type, title, icon, optional issuer allowlist               |
-| **Badge Award**      | `app.certified.badge.award`        | Awards a badge to a user, project, or activity                                  |
-| **Badge Response**   | `app.certified.badge.response`     | Recipient accepts or rejects a badge award                                      |
-| **EVM Link**         | `app.certified.link.evm`           | Verifiable ATProto DID to EVM wallet link via EIP-712 signature                 |
+| Lexicon              | NSID                               | Purpose                                                                                                                      |
+| -------------------- | ---------------------------------- | ---------------------------------------------------------------------------------------------------------------------------- |
+| **Location**         | `app.certified.location`           | Geographic reference via [Location Protocol](https://spec.decentralizedgeo.org)                                              |
+| **Profile**          | `app.certified.actor.profile`      | User profile: display name, bio, avatar, banner                                                                              |
+| **Organization**     | `app.certified.actor.organization` | Organization metadata: legal structure, URLs, location, founding date, optional long description, discoverability visibility |
+| **Badge Definition** | `app.certified.badge.definition`   | Defines a badge with type, title, icon, optional issuer allowlist                                                            |
+| **Badge Award**      | `app.certified.badge.award`        | Awards a badge to a user, project, or activity                                                                               |
+| **Badge Response**   | `app.certified.badge.response`     | Recipient accepts or rejects a badge award                                                                                   |
+| **EVM Link**         | `app.certified.link.evm`           | Verifiable ATProto DID to EVM wallet link via EIP-712 signature                                                              |
 
 ## Relationship Map
 

.changeset/sync-skill-organization-fields.md

@@ -0,0 +1,5 @@
+---
+"@hypercerts-org/lexicon": patch
+---
+
+Sync `SKILL.md` Organization row with `README.md`: list `foundedDate`, `longDescription`, and `visibility` in the Certified lexicons overview table so AI agents building on top of `app.certified.actor.organization` see the full set of documented fields.