/.well-known/agent.json: what this site serves, for agents (SEO-2) (#282)

ddiff --git a/server/agent-descriptor.js b/server/agent-descriptor.js
nnew file mode 100644
iindex 0000000..745e7ff
---- /dev/null
++++ b/server/agent-descriptor.js
@@@ -0,0 +1,15 @@
++'use strict';
++// What OpenVibe.AI tells an agent about itself (openvibe-shared/agent-layer): /.well-known/agent.json (SEO-2).
++// Every field is something this site really serves; the purpose is its own llms.txt summary.
++module.exports = {
++    id: "ai",
++    name: "OpenVibe.AI",
++    purpose: "One API for chat, summaries, extraction and embeddings across many models, OpenAI-compatible. Every run says which model answered, why and what it cost.",
++    home: "https://ai.openvibe.services",
++    site: "ai.openvibe.services",
++    api: "/api/v1",
++    docs: "https://openvibe.services/docs/api",
++    policy: {
++        auth: ["Network OIDC"],
++    },
++};
ddiff --git a/server/app.js b/server/app.js
iindex d9bd734..f011909 100644
---- a/server/app.js
++++ b/server/app.js
@@@ -23,6 +23,8 @@ const pkg = require('../package.json');
  
  function createApp({ config, db, registry, pool, quotas, cache, runs, auth, keys, env = process.env, clock = { now: () => Date.now() }, fetchImpl = globalThis.fetch, log = console, credentials = null, preferences = null, grants = null, vault = null, benchEvents = null, runBudgets = null, memory = null }) {
      const app = express();
++    // /.well-known/agent.json (openvibe-shared/agent-layer, SEO-2): what this site serves, for agents.
++    require('openvibe-shared/agent-layer').mount(app, { descriptor: require('./agent-descriptor') });
      app.disable('x-powered-by');
      app.set('trust proxy', 'loopback');
      const release = createRelease({ service: 'ai', root: path.join(__dirname, '..') });
ddiff --git a/test/agent-json.test.js b/test/agent-json.test.js
nnew file mode 100644
iindex 0000000..fcd860e
---- /dev/null
++++ b/test/agent-json.test.js
@@@ -0,0 +1,19 @@
++'use strict';
++// SEO-2: /.well-known/agent.json answered 404 here (11-03 check of all 55 sites). The shared agent layer serves this
++// site's descriptor; every field is something it really serves.
++const assert = require('assert');
++const fs = require('fs');
++const path = require('path');
++const descriptor = require('../server/agent-descriptor');
++const { agentManifest } = require('openvibe-shared/agent-layer');
++
++const m = agentManifest(descriptor);
++assert.strictEqual(m.network, 'OpenVibe');
++assert.strictEqual(m.home, 'https://ai.openvibe.services');
++assert.ok(m.purpose && m.purpose.length > 40, 'a purpose');
++assert.ok(/^https:\/\//.test(m.api), 'its API, absolute');
++assert.strictEqual(m.llms, 'https://ai.openvibe.services/llms.txt');
++assert.ok(Array.isArray(m.policy.auth) && m.policy.auth.length, 'how it is called');
++const app = fs.readFileSync(path.join(__dirname, '..', 'server', 'app.js'), 'utf8');
++assert.match(app, /require\('openvibe-shared\/agent-layer'\)\.mount\(app, \{ descriptor: require\('\.\/agent-descriptor'\) \}\);/);
++console.log('agent.json: ok');